DoEasy. Controles (Parte 21): O controle SplitContainer. Separador de painéis
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Exemplos
| 10 janeiro 2023, 12:54
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Conteúdo
- Ideia
- Modificando as classes da biblioteca
- Classe do objeto separador auxiliar
- Teste
- O que virá a seguir?
Ideia
No último artigo, começamos a trabalhar na criação do controle SplitContainer. Neste momento, a biblioteca pode criar um elemento como um objeto estático que possui dois painéis com valores de parâmetros padrão. O objeto tem dois painéis divididos por um separador. No objeto original no MS Visual Studio, podemos mover o separador, eventualmente alterando o tamanho dos painéis.
Ao passar o cursor do mouse sobre a área do separador, aparece um cursor característico, indicando a possibilidade de deslocamento do separador ( 
), e quando é capturado com o mouse, o separador é pintado com uma área hachurada que pode ser movida, indicando assim a nova localização do separador. Quando você solta o botão do mouse, os painéis são redimensionados de acordo com a nova posição do separador.
Como o MQL5 não oferece a capacidade de alterar a aparência do cursor, por enquanto não faremos nenhum "sinal" de que "é possível agarrar e arrastar", mas simplesmente aplicaremos a área hachurada na área do separador, indicando assim que pode ser deslocado. No objeto SplitContainer do MS Visual Studio, a ordem é:
- Ao passar o mouse sobre a área do separador, aparece um cursor indicando que pode ser movido;
- Quando você pressiona e segura o botão do mouse (mas não move o cursor), um retângulo pontilhado aparece contornando a área do separador;
- Quando o cursor do mouse é movido, uma área hachurada aparece e segue o cursor, indicando a nova posição do separador que será estabelecida quando o botão do mouse é solto. A área hachurada tem o mesmo tamanho do separador.
- Quando o botão do mouse é solto, os painéis são redimensionados de acordo com a nova posição do separador.
Teremos uma sequência de passos mais simples:
- Ao passar o mouse sobre a área do separador, uma área hachurada aparece;
- Uma vez o mouse captura a área hachurada e a move, as dimensões dos painéis são imediatamente alteradas de acordo com a nova posição do separador;
- Após soltar o botão do mouse e mover o cursor para longe da área do separador, a área hachurada fica oculta e os painéis permanecem com seus novos tamanhos.
Construiremos o objeto separador como um objeto derivado do objeto base de todos os objetos da biblioteca WinForms, isto é, da classe CWinFormBase, na qual os métodos virtuais para limpar e redesenhar o objeto serão substituídos, pois eles desenharão o campo hachurado que preenche toda a área do objeto. Controlaremos a visibilidade deste objeto a partir do manipulador de eventos do controle SplitContainer. Ao passar o mouse sobre a área do controle, o objeto será exibido e, ao afastar o cursor, ele ficará oculto. Tal área pode conter tanto o próprio separador neste objeto quanto botões de controle em outros objetos, como minimizar/maximizar/fechar a janela em futuros objetos de biblioteca, etc.
Modificando as classes da biblioteca
Para especificar as coordenadas e tamanhos da área do controle, vamos adicionar novas propriedades inteiras do objeto elemento gráfico e novos identificadores de eventos e estados do mouse.
No arquivo \MQL5\Include\DoEasy\Defines.mqh, adicionamos novos identificadores à lista de possíveis estados do mouse relativos à forma:
//+------------------------------------------------------------------+ //| The list of possible mouse states relative to the form | //+------------------------------------------------------------------+ enum ENUM_MOUSE_FORM_STATE { MOUSE_FORM_STATE_NONE = 0, // Undefined state //--- Outside the form MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED, // The cursor is outside the form, the mouse buttons are not clicked MOUSE_FORM_STATE_OUTSIDE_FORM_PRESSED, // The cursor is outside the form, the mouse button (any) is clicked MOUSE_FORM_STATE_OUTSIDE_FORM_WHEEL, // The cursor is outside the form, the mouse wheel is being scrolled //--- Within the form MOUSE_FORM_STATE_INSIDE_FORM_NOT_PRESSED, // The cursor is inside the form, no mouse buttons are clicked MOUSE_FORM_STATE_INSIDE_FORM_PRESSED, // The cursor is inside the form, the mouse button (any) is clicked MOUSE_FORM_STATE_INSIDE_FORM_WHEEL, // The cursor is inside the form, the mouse wheel is being scrolled //--- Within the window header area MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_NOT_PRESSED, // The cursor is inside the active area, the mouse buttons are not clicked MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_PRESSED, // The cursor is inside the active area, any mouse button is clicked MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_WHEEL, // The cursor is inside the active area, the mouse wheel is being scrolled MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_RELEASED, // The cursor is inside the active area, left mouse button is released //--- Within the window scrolling area MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_NOT_PRESSED, // The cursor is within the window scrolling area, the mouse buttons are not clicked MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_PRESSED, // The cursor is within the window scrolling area, the mouse button (any) is clicked MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_WHEEL, // The cursor is within the window scrolling area, the mouse wheel is being scrolled //--- Within the window resizing area MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_NOT_PRESSED, // The cursor is within the window resizing area, the mouse buttons are not clicked MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_PRESSED, // The cursor is within the window resizing area, the mouse button (any) is clicked MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_WHEEL, // The cursor is within the window resizing area, the mouse wheel is being scrolled //--- Within the window separator area MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_NOT_PRESSED, // The cursor is within the window resizing area, the mouse buttons are not clicked MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_PRESSED, // The cursor is within the window resizing area, the mouse button (any) is clicked MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_WHEEL, // The cursor is within the window separator area, the mouse wheel is being scrolled }; //+------------------------------------------------------------------+
A área de redimensionamento da janela é a área superior, inferior, esquerda e direita, ao passar o mouse sobre ela, torna-se possível alterar o tamanho do elemento gráfico para o qual essa possibilidade foi considerada durante o projeto e desenvolvimento. Inserimos esses identificadores aqui pensando no futuro, pois ainda precisaremos redimensionar a janela com o mouse e por que não inserir esses identificadores agora?
Na lista de possíveis eventos do mouse, inseriremos novos identificadores de evento correspondentes aos novos estados do mouse relativos à forma:
//+------------------------------------------------------------------+ //| List of possible mouse events | //+------------------------------------------------------------------+ enum ENUM_MOUSE_EVENT { MOUSE_EVENT_NO_EVENT = CHART_OBJ_EVENTS_NEXT_CODE, // No event //--- MOUSE_EVENT_OUTSIDE_FORM_NOT_PRESSED, // The cursor is outside the form, the mouse buttons are not clicked MOUSE_EVENT_OUTSIDE_FORM_PRESSED, // The cursor is outside the form, the mouse button (any) is clicked MOUSE_EVENT_OUTSIDE_FORM_WHEEL, // The cursor is outside the form, the mouse wheel is being scrolled //--- Within the form MOUSE_EVENT_INSIDE_FORM_NOT_PRESSED, // The cursor is inside the form, no mouse buttons are clicked MOUSE_EVENT_INSIDE_FORM_PRESSED, // The cursor is inside the form, the mouse button (any) is clicked MOUSE_EVENT_INSIDE_FORM_WHEEL, // The cursor is inside the form, the mouse wheel is being scrolled //--- Within the window header area MOUSE_EVENT_INSIDE_ACTIVE_AREA_NOT_PRESSED, // The cursor is inside the active area, the mouse buttons are not clicked MOUSE_EVENT_INSIDE_ACTIVE_AREA_PRESSED, // The cursor is inside the active area, any mouse button is clicked MOUSE_EVENT_INSIDE_ACTIVE_AREA_WHEEL, // The cursor is inside the active area, the mouse wheel is being scrolled MOUSE_EVENT_INSIDE_ACTIVE_AREA_RELEASED, // The cursor is inside the active area, left mouse button is released //--- Within the window scrolling area MOUSE_EVENT_INSIDE_SCROLL_AREA_NOT_PRESSED, // The cursor is within the window scrolling area, the mouse buttons are not clicked MOUSE_EVENT_INSIDE_SCROLL_AREA_PRESSED, // The cursor is within the window scrolling area, the mouse button (any) is clicked MOUSE_EVENT_INSIDE_SCROLL_AREA_WHEEL, // The cursor is within the window scrolling area, the mouse wheel is being scrolled //--- Within the window resizing area MOUSE_EVENT_INSIDE_RESIZE_AREA_NOT_PRESSED, // The cursor is within the window resizing area, the mouse buttons are not clicked MOUSE_EVENT_INSIDE_RESIZE_AREA_PRESSED, // The cursor is within the window resizing area, the mouse button (any) is clicked MOUSE_EVENT_INSIDE_RESIZE_AREA_WHEEL, // The cursor is within the window resizing area, the mouse wheel is being scrolled //--- Within the window separator area MOUSE_EVENT_INSIDE_SPLITTER_AREA_NOT_PRESSED, // The cursor is within the window resizing area, the mouse buttons are not clicked MOUSE_EVENT_INSIDE_SPLITTER_AREA_PRESSED, // The cursor is within the window resizing area, the mouse button (any) is clicked MOUSE_EVENT_INSIDE_SPLITTER_AREA_WHEEL, // The cursor is within the window separator area, the mouse wheel is being scrolled }; #define MOUSE_EVENT_NEXT_CODE (MOUSE_EVENT_INSIDE_SPLITTER_AREA_WHEEL+1) // The code of the next event after the last mouse event code //+------------------------------------------------------------------+
Como agora temos novas constantes de enumeração, a última constante de enumeração MOUSE_EVENT_INSIDE_SPLITTER_AREA_WHEEL deve ser inserida na macro substituição MOUSE_EVENT_NEXT_CODE em vez da anterior MOUSE_EVENT_INSIDE_SCROLL_AREA_WHEEL.
Hoje vamos trabalhar em um novo tipo de elemento gráfico auxiliar e adicioná-lo à lista de tipos de elementos gráficos
//+------------------------------------------------------------------+ //| The list of graphical element types | //+------------------------------------------------------------------+ enum ENUM_GRAPH_ELEMENT_TYPE { GRAPH_ELEMENT_TYPE_STANDARD, // Standard graphical object GRAPH_ELEMENT_TYPE_STANDARD_EXTENDED, // Extended standard graphical object GRAPH_ELEMENT_TYPE_SHADOW_OBJ, // Shadow object GRAPH_ELEMENT_TYPE_ELEMENT, // Element GRAPH_ELEMENT_TYPE_FORM, // Form GRAPH_ELEMENT_TYPE_WINDOW, // Window //--- WinForms GRAPH_ELEMENT_TYPE_WF_UNDERLAY, // Panel object underlay GRAPH_ELEMENT_TYPE_WF_BASE, // Windows Forms Base //--- 'Container' object types are to be set below GRAPH_ELEMENT_TYPE_WF_CONTAINER, // Windows Forms container base object GRAPH_ELEMENT_TYPE_WF_PANEL, // Windows Forms Panel GRAPH_ELEMENT_TYPE_WF_GROUPBOX, // Windows Forms GroupBox GRAPH_ELEMENT_TYPE_WF_TAB_CONTROL, // Windows Forms TabControl GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER, // Windows Forms SplitContainer //--- 'Standard control' object types are to be set below GRAPH_ELEMENT_TYPE_WF_COMMON_BASE, // Windows Forms base standard control GRAPH_ELEMENT_TYPE_WF_LABEL, // Windows Forms Label GRAPH_ELEMENT_TYPE_WF_BUTTON, // Windows Forms Button GRAPH_ELEMENT_TYPE_WF_CHECKBOX, // Windows Forms CheckBox GRAPH_ELEMENT_TYPE_WF_RADIOBUTTON, // Windows Forms RadioButton GRAPH_ELEMENT_TYPE_WF_ELEMENTS_LIST_BOX, // Base list object of Windows Forms elements GRAPH_ELEMENT_TYPE_WF_LIST_BOX, // Windows Forms ListBox GRAPH_ELEMENT_TYPE_WF_CHECKED_LIST_BOX, // Windows Forms CheckedListBox GRAPH_ELEMENT_TYPE_WF_BUTTON_LIST_BOX, // Windows Forms ButtonListBox //--- Auxiliary elements of WinForms objects GRAPH_ELEMENT_TYPE_WF_LIST_BOX_ITEM, // Windows Forms ListBoxItem GRAPH_ELEMENT_TYPE_WF_TAB_HEADER, // Windows Forms TabHeader GRAPH_ELEMENT_TYPE_WF_TAB_FIELD, // Windows Forms TabField GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL, // Windows Forms SplitContainerPanel GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON, // Windows Forms ArrowButton GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP, // Windows Forms UpArrowButton GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_DOWN, // Windows Forms DownArrowButton GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_LEFT, // Windows Forms LeftArrowButton GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_RIGHT, // Windows Forms RightArrowButton GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_UD_BOX, // Windows Forms UpDownArrowButtonsBox GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_LR_BOX, // Windows Forms LeftRightArrowButtonsBox GRAPH_ELEMENT_TYPE_WF_SPLITTER, // Windows Forms Splitter }; //+------------------------------------------------------------------+
Adicionaremos um novo evento à lista de eventos possíveis de elementos de controle WinForms: o movimento do separador.
//+------------------------------------------------------------------+ //| List of possible WinForms control events | //+------------------------------------------------------------------+ enum ENUM_WF_CONTROL_EVENT { WF_CONTROL_EVENT_NO_EVENT = GRAPH_OBJ_EVENTS_NEXT_CODE,// No event WF_CONTROL_EVENT_CLICK, // "Click on the control" event WF_CONTROL_EVENT_CLICK_CANCEL, // "Canceling the click on the control" event WF_CONTROL_EVENT_TAB_SELECT, // "TabControl tab selection" event WF_CONTROL_EVENT_CLICK_SCROLL_LEFT, // "Clicking the control left button" event WF_CONTROL_EVENT_CLICK_SCROLL_RIGHT, // "Clicking the control right button" event WF_CONTROL_EVENT_CLICK_SCROLL_UP, // "Clicking the control up button" event WF_CONTROL_EVENT_CLICK_SCROLL_DOWN, // "Clicking the control down button" event WF_CONTROL_EVENT_SPLITTER_MOVE, // "Control separator relocation" event }; #define WF_CONTROL_EVENTS_NEXT_CODE (WF_CONTROL_EVENT_SPLITTER_MOVE+1) // The code of the next event after the last graphical element event code //+------------------------------------------------------------------+
Aqui, da mesma forma que acima, a macro substituição WF_CONTROL_EVENTS_NEXT_CODE deve ser preenchida com a última constante de enumeração WF_CONTROL_EVENT_SPLITTER_MOVE, pois agora é a última constante desta enumeração.
Para poder especificar como o separador deve estar localizado no objeto, vamos escrever uma enumeração:
//+------------------------------------------------------------------+ //| Separator location in Split Container | //+------------------------------------------------------------------+ enum ENUM_CANV_ELEMENT_SPLITTER_ORIENTATION { CANV_ELEMENT_SPLITTER_ORIENTATION_VERTICAL, // Vertical CANV_ELEMENT_SPLITTER_ORIENTATION_HORISONTAL, // Horizontal }; //+------------------------------------------------------------------+ //| Integer properties of the graphical element on the canvas | //+------------------------------------------------------------------+
Adicionamos novas propriedades à lista de propriedades inteiras do elemento gráfico na tela e aumentamos seu número total para 122:
//+------------------------------------------------------------------+ //| Integer properties of the graphical element on the canvas | //+------------------------------------------------------------------+ enum ENUM_CANV_ELEMENT_PROP_INTEGER { CANV_ELEMENT_PROP_ID = 0, // Element ID CANV_ELEMENT_PROP_TYPE, // Graphical element type //---... //---... CANV_ELEMENT_PROP_VISIBLE_AREA_WIDTH, // Visibility scope width CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT, // Visibility scope height CANV_ELEMENT_PROP_CONTROL_AREA_X, // Control area X coordinate CANV_ELEMENT_PROP_CONTROL_AREA_Y, // Control area Y coordinate CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH, // Control area width CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT, // Control area height CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT, // Right scroll area X coordinate CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT, // Right scroll area Y coordinate CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT, // Right scroll area width CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT, // Right scroll area height CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM, // Bottom scroll area X coordinate CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM, // Bottom scroll area Y coordinate CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM, // Bottom scroll area width CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM, // Bottom scroll area height CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH, // Left edge area width CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH, // Bottom edge area width CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH, // Right edge area width CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH, // Upper edge area width CANV_ELEMENT_PROP_DISPLAYED, // Non-hidden control display flag CANV_ELEMENT_PROP_GROUP, // Group the graphical element belongs to //---... //---... CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE,// Distance from edge to separator CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH, // Separator width CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION,// Separator location CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED,// Flag for collapsed panel 1 CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE, // Panel 1 minimum size CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED,// Flag for collapsed panel 2 CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE, // Panel 2 minimum size }; #define CANV_ELEMENT_PROP_INTEGER_TOTAL (122) // Total number of integer properties #define CANV_ELEMENT_PROP_INTEGER_SKIP (0) // Number of integer properties not used in sorting //+------------------------------------------------------------------+
Vamos adicionar novos critérios de classificação por novas propriedades à lista de possíveis critérios de classificação de elementos gráficos na tela:
//+------------------------------------------------------------------+ //| Possible sorting criteria of graphical elements on the canvas | //+------------------------------------------------------------------+ #define FIRST_CANV_ELEMENT_DBL_PROP (CANV_ELEMENT_PROP_INTEGER_TOTAL-CANV_ELEMENT_PROP_INTEGER_SKIP) #define FIRST_CANV_ELEMENT_STR_PROP (CANV_ELEMENT_PROP_INTEGER_TOTAL-CANV_ELEMENT_PROP_INTEGER_SKIP+CANV_ELEMENT_PROP_DOUBLE_TOTAL-CANV_ELEMENT_PROP_DOUBLE_SKIP) enum ENUM_SORT_CANV_ELEMENT_MODE { //--- Sort by integer properties SORT_BY_CANV_ELEMENT_ID = 0, // Sort by element ID SORT_BY_CANV_ELEMENT_TYPE, // Sort by graphical element type //---... //---... SORT_BY_CANV_ELEMENT_VISIBLE_AREA_WIDTH, // Sort by visibility scope width SORT_BY_CANV_ELEMENT_VISIBLE_AREA_HEIGHT, // Sort by visibility scope height SORT_BY_CANV_ELEMENT_CONTROL_AREA_X, // Sort by control area X coordinate SORT_BY_CANV_ELEMENT_CONTROL_AREA_Y, // Sort by control area Y coordinate SORT_BY_CANV_ELEMENT_CONTROL_AREA_WIDTH, // Sort by control area width SORT_BY_CANV_ELEMENT_CONTROL_AREA_HEIGHT, // Sort by control area height SORT_BY_CANV_ELEMENT_SCROLL_AREA_X_RIGHT, // Sort by right scroll area X coordinate SORT_BY_CANV_ELEMENT_SCROLL_AREA_Y_RIGHT, // Sort by right scroll area Y coordinate SORT_BY_CANV_ELEMENT_SCROLL_AREA_WIDTH_RIGHT, // Sort by right scroll area width SORT_BY_CANV_ELEMENT_SCROLL_AREA_HEIGHT_RIGHT, // Sort by right scroll area height SORT_BY_CANV_ELEMENT_SCROLL_AREA_X_BOTTOM, // Sort by bottom scroll area X coordinate SORT_BY_CANV_ELEMENT_SCROLL_AREA_Y_BOTTOM, // Sort by bottom scroll area Y coordinate SORT_BY_CANV_ELEMENT_SCROLL_AREA_WIDTH_BOTTOM, // Sort by bottom scroll area width SORT_BY_CANV_ELEMENT_SCROLL_AREA_HEIGHT_BOTTOM, // Sort by bottom scroll area height SORT_BY_CANV_ELEMENT_BORDER_LEFT_AREA_WIDTH, // Sort by left edge area width SORT_BY_CANV_ELEMENT_BORDER_BOTTOM_AREA_WIDTH, // Sort by bottom edge area width SORT_BY_CANV_ELEMENT_BORDER_RIGHT_AREA_WIDTH, // Sort by right edge area width SORT_BY_CANV_ELEMENT_BORDER_TOP_AREA_WIDTH, // Sort by upper edge area width SORT_BY_CANV_ELEMENT_DISPLAYED, // Sort by non-hidden control display flag SORT_BY_CANV_ELEMENT_GROUP, // Sort by a group the graphical element belongs to //---... //---... SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_SPLITTER_DISTANCE,// Sort by distance from edge to separator SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_SPLITTER_WIDTH, // Sort by separator width SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_SPLITTER_ORIENTATION,// Sort by separator location SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_PANEL1_COLLAPSED,// Sort by flag for collapsed panel 1 SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_PANEL1_MIN_SIZE, // Sort by panel 1 minimum size SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_PANEL2_COLLAPSED,// Sort by flag for collapsed panel 2 SORT_BY_CANV_ELEMENT_SPLIT_CONTAINER_PANEL2_MIN_SIZE, // Sort by panel 2 minimum size //--- Sort by real properties //--- Sort by string properties SORT_BY_CANV_ELEMENT_NAME_OBJ = FIRST_CANV_ELEMENT_STR_PROP,// Sort by an element object name SORT_BY_CANV_ELEMENT_NAME_RES, // Sort by the graphical resource name SORT_BY_CANV_ELEMENT_TEXT, // Sort by graphical element text SORT_BY_CANV_ELEMENT_DESCRIPTION, // Sort by graphical element description }; //+------------------------------------------------------------------+
Agora poderemos selecionar, classificar e filtrar objetos por essas novas propriedades.
No arquivo \MQL5\Include\DoEasy\Data.mqh, escrevemos os índices das novas mensagens:
MSG_LIB_TEXT_TOP, // Top MSG_LIB_TEXT_BOTTOM, // Bottom MSG_LIB_TEXT_LEFT, // Left MSG_LIB_TEXT_RIGHT, // Right MSG_LIB_TEXT_VERTICAL, // Vertically MSG_LIB_TEXT_HORISONTAL, // Horizontally
...
MSG_GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL, // SplitContainer control panel MSG_GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER, // SplitContainer control MSG_GRAPH_ELEMENT_TYPE_WF_SPLITTER, // Splitter control MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON, // ArrowButton control MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP, // UpArrowButton control
...
MSG_CANV_ELEMENT_PROP_VISIBLE_AREA_WIDTH, // Visibility scope width MSG_CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT, // Visibility scope height MSG_CANV_ELEMENT_PROP_CONTROL_AREA_X, // Control area X coordinate MSG_CANV_ELEMENT_PROP_CONTROL_AREA_Y, // Control area Y coordinate MSG_CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH, // Control area width MSG_CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT, // Control area height MSG_CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT, // Right scroll area X coordinate MSG_CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT, // Right scroll area Y coordinate MSG_CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT, // Right scroll area width MSG_CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT, // Right scroll area height MSG_CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM, // Bottom scroll area X coordinate MSG_CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM, // Bottom scroll area Y coordinate MSG_CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM, // Bottom scroll area width MSG_CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM, // Bottom scroll area height MSG_CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH, // Left edge area width MSG_CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH, // Bottom edge area width MSG_CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH, // Right edge area width MSG_CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH, // Upper edge area width MSG_CANV_ELEMENT_PROP_DISPLAYED, // Non-hidden control display flag MSG_CANV_ELEMENT_PROP_ENABLED, // Element availability flag
...
MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE, // Distance from edge to separator MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH, // Separator width MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION, // Separator location MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED, // Flag for collapsed panel 1 MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE, // Panel 1 minimum size
e as mensagens de texto correspondentes aos índices recém-adicionados:
{"Сверху","Top"},
{"Снизу","Bottom"},
{"Слева","Left"},
{"Справа","Right"},
{"Вертикально","Vertical"},
{"Горизонтально","Horisontal"},
...
{"Панель элемента управления \"SplitContainer\"","Panel of the Control element \"SplitContainer\""},
{"Элемент управления \"SplitContainer\"","Control element \"SplitContainer\""},
{"Элемент управления \"Splitter\"","Control element \"Splitter\""},
{"Элемент управления \"ArrowButton\"","Control element \"ArrowButton\""},
{"Элемент управления \"UpArrowButton\"","Control element \"UpArrowButton\""},
...
{"Ширина области видимости","Width of object visibility area"},
{"Высота области видимости","Height of object visibility area"},
{"X-координата области управления","X-coordinate of the control area"},
{"Y-координата области управления","Y-coordinate of the control area"},
{"Ширина области управления","Control area width"},
{"Высота области управления","Control area height"},
{"X-координата области прокрутки справа","X-coordinate of the right scroll area"},
{"Y-координата области прокрутки справа","Y-coordinate of the right scroll area"},
{"Ширина области прокрутки справа","Width of the right scroll area"},
{"Высота области прокрутки справа","Height of the right scroll area"},
{"X-координата области прокрутки снизу","X-coordinate of the bottom scroll area"},
{"Y-координата области прокрутки снизу","Y-coordinate of the bottom scroll area"},
{"Ширина области прокрутки снизу","Width of the bottom scroll area"},
{"Высота области прокрутки снизу","Height of the bottom scroll area"},
{"Ширина области левой грани","Width of the left border area"},
{"Ширина области нижней грани","Width of the bottom border area"},
{"Ширина области правой грани","Width of the right border area"},
{"Ширина области верхней грани","Width of the top border area"},
{"Флаг отображения не скрытого элемента управления","Flag that sets the display of a non-hidden control"},
{"Флаг доступности элемента","Element Availability Flag"},
...
{"Расстояние от края до разделителя","Distance from edge to splitter"},
{"Толщина разделителя","Splitter Width"},
{"Расположение разделителя","Splitter orientation"},
{"Флаг свёрнутости панели 1","Flag to indicate that panel 1 is collapsed"},
{"Минимальный размер панели 1","Min size of Panel 1"},
Para poder obter uma descrição do tipo de um novo objeto, no arquivo \MQL5\Include\DoEasy\Objects\Graph\GBaseObj.mqh , adicionamos a saída da descrição do novo tipo de objeto ao método que retorna o descrição do tipo de elemento gráfico:
//+------------------------------------------------------------------+ //| Return the description of the graphical element type | //+------------------------------------------------------------------+ string CGBaseObj::TypeElementDescription(const ENUM_GRAPH_ELEMENT_TYPE type) { return ( type==GRAPH_ELEMENT_TYPE_STANDARD ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_STANDARD) : type==GRAPH_ELEMENT_TYPE_STANDARD_EXTENDED ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_STANDARD_EXTENDED) : type==GRAPH_ELEMENT_TYPE_ELEMENT ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_ELEMENT) : type==GRAPH_ELEMENT_TYPE_SHADOW_OBJ ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_SHADOW_OBJ) : type==GRAPH_ELEMENT_TYPE_FORM ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_FORM) : type==GRAPH_ELEMENT_TYPE_WINDOW ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WINDOW) : //--- WinForms type==GRAPH_ELEMENT_TYPE_WF_UNDERLAY ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_UNDERLAY) : type==GRAPH_ELEMENT_TYPE_WF_BASE ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_BASE) : //--- Containers type==GRAPH_ELEMENT_TYPE_WF_CONTAINER ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_CONTAINER) : type==GRAPH_ELEMENT_TYPE_WF_GROUPBOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_GROUPBOX) : type==GRAPH_ELEMENT_TYPE_WF_PANEL ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_PANEL) : type==GRAPH_ELEMENT_TYPE_WF_TAB_CONTROL ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_TAB_CONTROL) : type==GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER) : //--- Standard controls type==GRAPH_ELEMENT_TYPE_WF_COMMON_BASE ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_COMMON_BASE) : type==GRAPH_ELEMENT_TYPE_WF_LABEL ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_LABEL) : type==GRAPH_ELEMENT_TYPE_WF_CHECKBOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_CHECKBOX) : type==GRAPH_ELEMENT_TYPE_WF_RADIOBUTTON ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_RADIOBUTTON) : type==GRAPH_ELEMENT_TYPE_WF_BUTTON ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_BUTTON) : type==GRAPH_ELEMENT_TYPE_WF_ELEMENTS_LIST_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ELEMENTS_LIST_BOX) : type==GRAPH_ELEMENT_TYPE_WF_LIST_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_LIST_BOX) : type==GRAPH_ELEMENT_TYPE_WF_LIST_BOX_ITEM ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_LIST_BOX_ITEM) : type==GRAPH_ELEMENT_TYPE_WF_CHECKED_LIST_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_CHECKED_LIST_BOX) : type==GRAPH_ELEMENT_TYPE_WF_BUTTON_LIST_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_BUTTON_LIST_BOX) : //--- Auxiliary control objects type==GRAPH_ELEMENT_TYPE_WF_TAB_HEADER ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_TAB_HEADER) : type==GRAPH_ELEMENT_TYPE_WF_TAB_FIELD ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_TAB_FIELD) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_DOWN ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_DOWN) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_LEFT ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_LEFT) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_RIGHT ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_RIGHT) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_UD_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_UD_BOX) : type==GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_LR_BOX ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_LR_BOX) : type==GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL) : type==GRAPH_ELEMENT_TYPE_WF_SPLITTER ? CMessage::Text(MSG_GRAPH_ELEMENT_TYPE_WF_SPLITTER) : "Unknown" ); } //+------------------------------------------------------------------+
O método retorna a mensagem de texto apropriada dependendo do tipo de elemento gráfico passado para ele.
Como temos novas propriedades do elemento gráfico, precisamos adicioná-las à estrutura do objeto para que o objeto possa ser armazenado e lido corretamente de um arquivo.
No arquivo \MQL5\Include\DoEasy\Objects\Graph\GCnvElement.mqh, adicionamos novas propriedades à estrutura:
private: int m_shift_coord_x; // Offset of the X coordinate relative to the base object int m_shift_coord_y; // Offset of the Y coordinate relative to the base object struct SData { //--- Object integer properties int id; // Element ID int type; // Graphical element type //---... //---... bool displayed; // Non-hidden control display flag int split_container_fixed_panel; // Panel that retains its size when the container is resized bool split_container_splitter_fixed; // Separator moveability flag int split_container_splitter_distance; // Distance from edge to separator int split_container_splitter_width; // Separator width int split_container_splitter_orientation; // Separator location bool split_container_panel1_collapsed; // Flag for collapsed panel 1 int split_container_panel1_min_size; // Panel 1 minimum size bool split_container_panel2_collapsed; // Flag for collapsed panel 2 int split_container_panel2_min_size; // Panel 2 minimum size int control_area_x; // Control area X coordinate int control_area_y; // Control area Y coordinate int control_area_width; // Control area width int control_area_height; // Control area height int scroll_area_x_right; // Right scroll area X coordinate int scroll_area_y_right; // Right scroll area Y coordinate int scroll_area_width_right; // Right scroll area width int scroll_area_height_right; // Right scroll area height int scroll_area_x_bottom; // Bottom scroll area X coordinate int scroll_area_y_bottom; // Bottom scroll area Y coordinate int scroll_area_width_bottom; // Bottom scroll area width int scroll_area_height_bottom; // Bottom scroll area height int border_left_area_width; // Left edge area width int border_bottom_area_width; // Bottom edge area width int border_right_area_width; // Right edge area width int border_top_area_width; // Upper edge area width //--- Object real properties //--- Object string properties uchar name_obj[64]; // Graphical element object name uchar name_res[64]; // Graphical resource name uchar text[256]; // Graphical element text uchar descript[256]; // Graphical element description }; SData m_struct_obj; // Object structure
Na seção pública da classe, declararemos um método que retorna a posição do cursor em relação à área de controle do elemento:
//--- (1) Save the graphical resource to the array and (2) restore the resource from the array bool ResourceStamp(const string source); virtual bool Reset(void); //--- Return the cursor position relative to the (1) entire element, (2) the element active area and (3) control area bool CursorInsideElement(const int x,const int y); bool CursorInsideActiveArea(const int x,const int y); bool CursorInsideControlArea(const int x,const int y); //--- Create the element bool Create(const long chart_id, const int wnd_num, const int x, const int y, const int w, const int h, const bool redraw=false);
O método retornará um sinalizador que indica se o cursor está dentro da área de controle do elemento, que pode conter vários elementos de controle, neste caso o separador.
Para o método que retorna o sinalizador de visibilidade do elemento, adicionaremos o modificador de constante que faltava anteriormente:
//--- (1) Set and (2) return the flag for displaying a non-hidden control void SetDisplayed(const bool flag) { this.SetProperty(CANV_ELEMENT_PROP_DISPLAYED,flag); } bool Displayed(void) const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_DISPLAYED); } //--- (1) Set and (2) return the graphical element type
Na seção pública, vamos adicionar métodos que retornam as novas propriedades do objeto que foram adicionadas a ele hoje:
//--- Return the coordinate (1) of the left, (2) right, (3) top and (4) bottom edge of the element active area int ActiveAreaLeft(void) const { return int(this.CoordX()+this.ActiveAreaLeftShift()); } int ActiveAreaRight(void) const { return int(this.RightEdge()-this.ActiveAreaRightShift()); } int ActiveAreaTop(void) const { return int(this.CoordY()+this.ActiveAreaTopShift()); } int ActiveAreaBottom(void) const { return int(this.BottomEdge()-this.ActiveAreaBottomShift()); } //--- Return the (1) X, (2) Y coordinates, (3) width and (4) height of the element control area height int ControlAreaX(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X); } int ControlAreaY(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y); } int ControlAreaWidth(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH); } int ControlAreaHeight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT); } //--- Return the (1) X, (2) Y coordinates, (3) width and (4) height of the element right scroll area height int ScrollAreaXRight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT); } int ScrollAreaYRight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT); } int ScrollAreaWidthRight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT); } int ScrollAreaHeightRight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT); } //--- Return the (1) X, (2) Y coordinates, (3) width and (4) height of the element bottom scroll area height int ScrollAreaXBottom(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM); } int ScrollAreaYBottom(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM); } int ScrollAreaWidthBottom(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM); } int ScrollAreaHeightBottom(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM); } //--- Return the width of the (1) left, (2) right, (3) upper and (4) lower element edge area int BorderResizeAreaLeft(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH); } int BorderResizeAreaRight(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH); } int BorderResizeAreaTop(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH); } int BorderResizeAreaBottom(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH); } //--- Return the number of colors set for the gradient filling of the (1) main background, when clicking (2), (3) when hovering the mouse over the control
Nos construtores da classe, escreveremos valores padrão em todas as novas propriedades do objeto:
//+------------------------------------------------------------------+ //| Parametric constructor | //+------------------------------------------------------------------+ CGCnvElement::CGCnvElement(const ENUM_GRAPH_ELEMENT_TYPE element_type, const int element_id, const int element_num, const long chart_id, const int wnd_num, const string descript, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool movable=true, const bool activity=true, const bool redraw=false) : m_shadow(false) { this.SetTypeElement(element_type); this.m_type=OBJECT_DE_TYPE_GELEMENT; this.m_element_main=NULL; this.m_element_base=NULL; this.m_chart_color_bg=(color)::ChartGetInteger((chart_id==NULL ? ::ChartID() : chart_id),CHART_COLOR_BACKGROUND); this.m_name=this.CreateNameGraphElement(element_type); this.m_chart_id=(chart_id==NULL || chart_id==0 ? ::ChartID() : chart_id); this.m_subwindow=wnd_num; this.SetFont(DEF_FONT,DEF_FONT_SIZE); this.m_text_anchor=0; this.m_text_x=0; this.m_text_y=0; this.SetBackgroundColor(colour,true); this.SetOpacity(opacity); this.m_shift_coord_x=0; this.m_shift_coord_y=0; if(::ArrayResize(this.m_array_colors_bg,1)==1) this.m_array_colors_bg[0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_dwn,1)==1) this.m_array_colors_bg_dwn[0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_ovr,1)==1) this.m_array_colors_bg_ovr[0]=this.BackgroundColor(); if(this.Create(chart_id,wnd_num,x,y,w,h,redraw)) { this.SetProperty(CANV_ELEMENT_PROP_NAME_RES,this.m_canvas.ResourceName()); // Graphical resource name this.SetProperty(CANV_ELEMENT_PROP_CHART_ID,CGBaseObj::ChartID()); // Chart ID this.SetProperty(CANV_ELEMENT_PROP_WND_NUM,CGBaseObj::SubWindow()); // Chart subwindow index //---... //---... this.SetProperty(CANV_ELEMENT_PROP_NAME_OBJ,CGBaseObj::Name()); // Element object name this.SetProperty(CANV_ELEMENT_PROP_TYPE,element_type); // Graphical element type this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT,h); // Visibility scope height this.SetProperty(CANV_ELEMENT_PROP_DISPLAYED,true); // Non-hidden control display flag this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,0); // Control area X coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,0); // Control area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,0); // Control area width this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,0); // Control area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT,0); // Right scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT,0); // Right scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT,0); // Right scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT,0); // Right scroll area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM,0); // Bottom scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM,0); // Bottom scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM,0); // Bottom scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM,0); // Bottom scroll area height this.SetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH,0); // Left edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH,0); // Bottom edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH,0); // Right edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH,0); // Top edge area width //--- this.SetProperty(CANV_ELEMENT_PROP_BELONG,ENUM_GRAPH_OBJ_BELONG::GRAPH_OBJ_BELONG_PROGRAM); // Graphical element affiliation this.SetProperty(CANV_ELEMENT_PROP_ZORDER,0); // Priority of a graphical object for receiving the event of clicking on a chart this.SetProperty(CANV_ELEMENT_PROP_BOLD_TYPE,FW_NORMAL); // Font width type //---... //---... this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE,50); // Distance from edge to separator this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH,4); // Separator width this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION,0); // Separator location this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED,false); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE,25); // Panel 1 minimum size this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED,false); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE,25); // Panel 2 minimum size this.SetVisibleFlag(false,false); } else { ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),"\"",this.TypeElementDescription(element_type),"\" ",this.NameObj()); } } //+------------------------------------------------------------------+ //| Protected constructor | //+------------------------------------------------------------------+ CGCnvElement::CGCnvElement(const ENUM_GRAPH_ELEMENT_TYPE element_type, const long chart_id, const int wnd_num, const string descript, const int x, const int y, const int w, const int h) : m_shadow(false) { this.m_type=OBJECT_DE_TYPE_GELEMENT; this.m_element_main=NULL; this.m_element_base=NULL; this.m_chart_color_bg=(color)::ChartGetInteger((chart_id==NULL ? ::ChartID() : chart_id),CHART_COLOR_BACKGROUND); this.m_name=this.CreateNameGraphElement(element_type); this.m_chart_id=(chart_id==NULL || chart_id==0 ? ::ChartID() : chart_id); this.m_subwindow=wnd_num; this.m_type_element=element_type; this.SetFont(DEF_FONT,DEF_FONT_SIZE); this.m_text_anchor=0; this.m_text_x=0; this.m_text_y=0; this.SetBackgroundColor(CLR_CANV_NULL,true); this.SetOpacity(0); this.m_shift_coord_x=0; this.m_shift_coord_y=0; if(::ArrayResize(this.m_array_colors_bg,1)==1) this.m_array_colors_bg[0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_dwn,1)==1) this.m_array_colors_bg_dwn[0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_ovr,1)==1) this.m_array_colors_bg_ovr[0]=this.BackgroundColor(); if(this.Create(chart_id,wnd_num,x,y,w,h,false)) { this.SetProperty(CANV_ELEMENT_PROP_NAME_RES,this.m_canvas.ResourceName()); // Graphical resource name this.SetProperty(CANV_ELEMENT_PROP_CHART_ID,CGBaseObj::ChartID()); // Chart ID this.SetProperty(CANV_ELEMENT_PROP_WND_NUM,CGBaseObj::SubWindow()); // Chart subwindow index //---... //---... this.SetProperty(CANV_ELEMENT_PROP_NAME_OBJ,CGBaseObj::Name()); // Element object name this.SetProperty(CANV_ELEMENT_PROP_TYPE,element_type); // Graphical element type this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT,h); // Visibility scope height this.SetProperty(CANV_ELEMENT_PROP_DISPLAYED,true); // Non-hidden control display flag this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,0); // Control area X coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,0); // Control area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,0); // Control area width this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,0); // Control area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT,0); // Right scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT,0); // Right scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT,0); // Right scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT,0); // Right scroll area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM,0); // Bottom scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM,0); // Bottom scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM,0); // Bottom scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM,0); // Bottom scroll area height this.SetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH,0); // Left edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH,0); // Bottom edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH,0); // Right edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH,0); // Top edge area width //--- this.SetProperty(CANV_ELEMENT_PROP_BELONG,ENUM_GRAPH_OBJ_BELONG::GRAPH_OBJ_BELONG_PROGRAM); // Graphical element affiliation this.SetProperty(CANV_ELEMENT_PROP_ZORDER,0); // Priority of a graphical object for receiving the event of clicking on a chart this.SetProperty(CANV_ELEMENT_PROP_BOLD_TYPE,FW_NORMAL); // Font width type //---... //---... this.SetProperty(CANV_ELEMENT_PROP_BORDER_STYLE,FRAME_STYLE_NONE); // Control frame style this.SetProperty(CANV_ELEMENT_PROP_BORDER_SIZE_TOP,0); // Control frame top size this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE,50); // Distance from edge to separator this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH,4); // Separator width this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION,0); // Separator location this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED,false); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE,25); // Panel 1 minimum size this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED,false); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE,25); // Panel 2 minimum size this.SetVisibleFlag(false,false); } else { ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),"\"",this.TypeElementDescription(element_type),"\" ",this.NameObj()); } } //+------------------------------------------------------------------+
Todas as propriedades são definidas como zero por padrão. Para a propriedade Orientação do Separador, zero significa a posição vertical do separador.
No método que cria a estrutura do objeto, escrevemos os valores das novas propriedades do elemento nos campos da estrutura:
//+------------------------------------------------------------------+ //| Create the object structure | //+------------------------------------------------------------------+ bool CGCnvElement::ObjectToStruct(void) { //--- Save integer properties this.m_struct_obj.id=(int)this.GetProperty(CANV_ELEMENT_PROP_ID); // Element ID this.m_struct_obj.type=(int)this.GetProperty(CANV_ELEMENT_PROP_TYPE); // Graphical element type this.m_struct_obj.belong=(int)this.GetProperty(CANV_ELEMENT_PROP_BELONG); // Graphical element affiliation this.m_struct_obj.number=(int)this.GetProperty(CANV_ELEMENT_PROP_NUM); // Element ID in the list //---... //---... this.m_struct_obj.split_container_splitter_distance=(int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE); // Distance from edge to separator this.m_struct_obj.split_container_splitter_width=(int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH); // Separator width this.m_struct_obj.split_container_splitter_orientation=(int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION); // Separator location this.m_struct_obj.split_container_panel1_collapsed=(bool)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED); // Flag for collapsed panel 1 this.m_struct_obj.split_container_panel1_min_size=(int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE); // Panel 1 minimum size this.m_struct_obj.split_container_panel2_collapsed=(bool)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED); // Flag for collapsed panel 1 this.m_struct_obj.split_container_panel2_min_size=(int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE); // Panel 2 minimum size this.m_struct_obj.control_area_x=(int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X); // Control area X coordinate this.m_struct_obj.control_area_y=(int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y); // Control area Y coordinate this.m_struct_obj.control_area_width=(int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH); // Control area width this.m_struct_obj.control_area_height=(int)this.GetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT); // Control area height this.m_struct_obj.scroll_area_x_right=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT); // Right scroll area X coordinate this.m_struct_obj.scroll_area_y_right=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT); // Right scroll area Y coordinate this.m_struct_obj.scroll_area_width_right=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT); // Right scroll area width this.m_struct_obj.scroll_area_height_right=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT); // Right scroll area height this.m_struct_obj.scroll_area_x_bottom=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM); // Bottom scroll area X coordinate this.m_struct_obj.scroll_area_y_bottom=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM); // Bottom scroll area Y coordinate this.m_struct_obj.scroll_area_width_bottom=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM); // Bottom scroll area width this.m_struct_obj.scroll_area_height_bottom=(int)this.GetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM);// Bottom scroll area height this.m_struct_obj.border_left_area_width=(int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH); // Left edge area width this.m_struct_obj.border_bottom_area_width=(int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH); // Bottom edge area width this.m_struct_obj.border_right_area_width=(int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH); // Right edge area width this.m_struct_obj.border_top_area_width=(int)this.GetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH); // Top edge area width //--- Save real properties //--- Save string properties ::StringToCharArray(this.GetProperty(CANV_ELEMENT_PROP_NAME_OBJ),this.m_struct_obj.name_obj); // Graphical element object name ::StringToCharArray(this.GetProperty(CANV_ELEMENT_PROP_NAME_RES),this.m_struct_obj.name_res); // Graphical resource name ::StringToCharArray(this.GetProperty(CANV_ELEMENT_PROP_TEXT),this.m_struct_obj.text); // Graphical element text ::StringToCharArray(this.GetProperty(CANV_ELEMENT_PROP_DESCRIPTION),this.m_struct_obj.descript);// Graphical element description //--- Save the structure to the uchar array ::ResetLastError(); if(!::StructToCharArray(this.m_struct_obj,this.m_uchar_array)) { CMessage::ToLog(DFUN,MSG_LIB_SYS_FAILED_SAVE_OBJ_STRUCT_TO_UARRAY,true); return false; } return true; } //+------------------------------------------------------------------+
No método que cria um objeto a partir de uma estrutura, escrevemos os valores dos campos correspondentes da estrutura nas propriedades do objeto:
//+------------------------------------------------------------------+ //| Create the object from the structure | //+------------------------------------------------------------------+ void CGCnvElement::StructToObject(void) { //--- Save integer properties this.SetProperty(CANV_ELEMENT_PROP_ID,this.m_struct_obj.id); // Element ID this.SetProperty(CANV_ELEMENT_PROP_TYPE,this.m_struct_obj.type); // Graphical element type this.SetProperty(CANV_ELEMENT_PROP_BELONG,this.m_struct_obj.belong); // Graphical element affiliation this.SetProperty(CANV_ELEMENT_PROP_NUM,this.m_struct_obj.number); // Element index in the list //---... //---... this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE,this.m_struct_obj.split_container_splitter_distance); // Distance from edge to separator this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH,this.m_struct_obj.split_container_splitter_width); // Separator width this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION,this.m_struct_obj.split_container_splitter_orientation); // Separator location this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED,this.m_struct_obj.split_container_panel1_collapsed); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE,this.m_struct_obj.split_container_panel1_min_size); // Panel 1 minimum size this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED,this.m_struct_obj.split_container_panel2_collapsed); // Flag for collapsed panel 1 this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE,this.m_struct_obj.split_container_panel2_min_size); // Panel 2 minimum size this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,this.m_struct_obj.control_area_x); // Control area X coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,this.m_struct_obj.control_area_y); // Control area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,this.m_struct_obj.control_area_width); // Control area width this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,this.m_struct_obj.control_area_height); // Control area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT,this.m_struct_obj.scroll_area_x_right); // Right scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT,this.m_struct_obj.scroll_area_y_right); // Right scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT,this.m_struct_obj.scroll_area_width_right); // Right scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT,this.m_struct_obj.scroll_area_height_right); // Right scroll area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM,this.m_struct_obj.scroll_area_x_bottom); // Bottom scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM,this.m_struct_obj.scroll_area_y_bottom); // Bottom scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM,this.m_struct_obj.scroll_area_width_bottom); // Bottom scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM,this.m_struct_obj.scroll_area_height_bottom); // Bottom scroll area height this.SetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH,this.m_struct_obj.border_left_area_width); // Left edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH,this.m_struct_obj.border_bottom_area_width); // Bottom edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH,this.m_struct_obj.border_right_area_width); // Right edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH,this.m_struct_obj.border_top_area_width); // Top edge area width //--- Save real properties //--- Save string properties this.SetProperty(CANV_ELEMENT_PROP_NAME_OBJ,::CharArrayToString(this.m_struct_obj.name_obj)); // Graphical element object name this.SetProperty(CANV_ELEMENT_PROP_NAME_RES,::CharArrayToString(this.m_struct_obj.name_res)); // Graphical resource name this.SetProperty(CANV_ELEMENT_PROP_TEXT,::CharArrayToString(this.m_struct_obj.text)); // Graphical element text this.SetProperty(CANV_ELEMENT_PROP_DESCRIPTION,::CharArrayToString(this.m_struct_obj.descript));// Graphical element description } //+------------------------------------------------------------------+
Fora do corpo da classe, vamos escrever uma implementação do método que retorna a posição do cursor em relação à área de controle do elemento:
//+------------------------------------------------------------------+ //|Return the cursor position relative to the element control area | //+------------------------------------------------------------------+ bool CGCnvElement::CursorInsideControlArea(const int x,const int y) { return(x>=this.ControlAreaX() && x<=this.ControlAreaX()+this.ControlAreaWidth() && y>=this.ControlAreaY() && y<=this.ControlAreaY()+this.ControlAreaHeight()); } //+------------------------------------------------------------------+
O método recebe as coordenadas do cursor e retorna um sinalizador que indica se os valores das coordenadas X e Y do cursor estão dentro dos limites da área de controle definidos para o objeto
No arquivo da classe do objeto forma \MQL5\Include\DoEasy\Objects\Graph\Form.mqh, no método que mostra a forma, adicionaremos uma verificação para os objetos anexados para garantir que o sinalizador de visibilidade do objeto esteja definido e, se o objeto não deve ser exibido, ele não deve ser mostrado.
//+------------------------------------------------------------------+ //| Show the form | //+------------------------------------------------------------------+ void CForm::Show(void) { //--- If the element should not be displayed (hidden inside another control), leave if(!this.Displayed()) return; //--- If the object has a shadow, display it if(this.m_shadow_obj!=NULL) this.m_shadow_obj.Show(); //--- Display the main form CGCnvElement::Show(); //--- In the loop by all bound graphical objects, for(int i=0;i<this.m_list_elements.Total();i++) { //--- get the next graphical element CGCnvElement *element=this.m_list_elements.At(i); if(element==NULL || !element.Displayed()) continue; //--- and display it element.Show(); } //--- Update the form CGCnvElement::Update(); } //+------------------------------------------------------------------+
No método que define e retorna o estado do mouse relativo à forma, vamos escrever um bloco de código que preencha o bit da variável m_mouse_state_flags, que é responsável pela localização do cursor dentro da área de controle:
//+------------------------------------------------------------------+ //| Set and get the mouse status relative to the form | //+------------------------------------------------------------------+ ENUM_MOUSE_FORM_STATE CForm::MouseFormState(const int id,const long lparam,const double dparam,const string sparam) { //--- Get the mouse status relative to the form, as well as the states of mouse buttons and Shift/Ctrl keys this.m_mouse_form_state=MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED; ENUM_MOUSE_BUTT_KEY_STATE state=this.m_mouse.ButtonKeyState(id,lparam,dparam,sparam); //--- Get the mouse status flags from the CMouseState class object and save them in the variable this.m_mouse_state_flags=this.m_mouse.GetMouseFlags(); //--- If the cursor is inside the form if(CGCnvElement::CursorInsideElement(this.m_mouse.CoordX(),this.m_mouse.CoordY())) { //--- Set bit 8 responsible for the "cursor inside the form" flag this.m_mouse_state_flags |= (0x0001<<8); //--- If the cursor is inside the active area, set bit 9 "cursor inside the active area" if(CGCnvElement::CursorInsideActiveArea(this.m_mouse.CoordX(),this.m_mouse.CoordY())) this.m_mouse_state_flags |= (0x0001<<9); //--- otherwise, release the bit "cursor inside the active area" else this.m_mouse_state_flags &=0xFDFF; //--- If the cursor is inside the control area, set bit 10 "cursor inside the control area", if(CGCnvElement::CursorInsideControlArea(this.m_mouse.CoordX(),this.m_mouse.CoordY())) this.m_mouse_state_flags |= (0x0001<<10); //--- otherwise, remove the "cursor inside the control area" bit else this.m_mouse_state_flags &=0xFBFF; //--- If one of the mouse buttons is clicked, check the cursor location in the active area and //--- return the appropriate value of the pressed key (in the active area or the form area) if((this.m_mouse_state_flags & 0x0001)!=0 || (this.m_mouse_state_flags & 0x0002)!=0 || (this.m_mouse_state_flags & 0x0010)!=0) this.m_mouse_form_state=((this.m_mouse_state_flags & 0x0200)!=0 ? MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_PRESSED : MOUSE_FORM_STATE_INSIDE_FORM_PRESSED); //--- otherwise, if not a single mouse button is pressed else { //--- if the mouse wheel is scrolled, return the appropriate wheel scrolling value (in the active area or the form area) if((this.m_mouse_state_flags & 0x0080)!=0) this.m_mouse_form_state=((this.m_mouse_state_flags & 0x0200)!=0 ? MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_WHEEL : MOUSE_FORM_STATE_INSIDE_FORM_WHEEL); //--- otherwise, return the appropriate value of the unpressed key (in the active area or the form area) else this.m_mouse_form_state=((this.m_mouse_state_flags & 0x0200)!=0 ? MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_NOT_PRESSED : MOUSE_FORM_STATE_INSIDE_FORM_NOT_PRESSED); } } //--- If the cursor is outside the form else { //--- return the appropriate button value in an inactive area this.m_mouse_form_state= ( ((this.m_mouse_state_flags & 0x0001)!=0 || (this.m_mouse_state_flags & 0x0002)!=0 || (this.m_mouse_state_flags & 0x0010)!=0) ? MOUSE_FORM_STATE_OUTSIDE_FORM_PRESSED : MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED ); } return this.m_mouse_form_state; } //+------------------------------------------------------------------+
Se o método CursorInsideControlArea() retornar true, isso significa que o cursor está na área de controle da forma, então é necessário definir o bit 10 (colocar em 1) como um sinalizador disso. Se o cursor não estiver na área de controle, o bit 10 será removido (definido como zero).
O manipulador de eventos do mouse será simplificado, escrevendo todos os casos do operador switch em uma única linha.
//+------------------------------------------------------------------+ //| Mouse event handler | //+------------------------------------------------------------------+ void CForm::OnMouseEvent(const int id,const long &lparam,const double &dparam,const string &sparam) { switch(id) { //--- The cursor is outside the form, the mouse buttons are not clicked //--- The cursor is outside the form, any mouse button is clicked //--- The cursor is outside the form, the mouse wheel is being scrolled case MOUSE_EVENT_OUTSIDE_FORM_NOT_PRESSED : case MOUSE_EVENT_OUTSIDE_FORM_PRESSED : case MOUSE_EVENT_OUTSIDE_FORM_WHEEL : break; //--- The cursor is inside the form, the mouse buttons are not clicked case MOUSE_EVENT_INSIDE_FORM_NOT_PRESSED : this.MouseInsideNotPressedHandler(id,lparam,dparam,sparam); break; //--- The cursor is inside the form, any mouse button is clicked case MOUSE_EVENT_INSIDE_FORM_PRESSED : this.MouseInsidePressedHandler(id,lparam,dparam,sparam); break; //--- The cursor is inside the form, the mouse wheel is being scrolled case MOUSE_EVENT_INSIDE_FORM_WHEEL : this.MouseInsideWhellHandler(id,lparam,dparam,sparam); break; //--- The cursor is inside the active area, the mouse buttons are not clicked case MOUSE_EVENT_INSIDE_ACTIVE_AREA_NOT_PRESSED : this.MouseActiveAreaNotPressedHandler(id,lparam,dparam,sparam);break; //--- The cursor is inside the active area, any mouse button is clicked case MOUSE_EVENT_INSIDE_ACTIVE_AREA_PRESSED : this.MouseActiveAreaPressedHandler(id,lparam,dparam,sparam); break; //--- The cursor is inside the active area, the mouse wheel is being scrolled case MOUSE_EVENT_INSIDE_ACTIVE_AREA_WHEEL : this.MouseActiveAreaWhellHandler(id,lparam,dparam,sparam); break; //--- The cursor is inside the active area, left mouse button is released case MOUSE_EVENT_INSIDE_ACTIVE_AREA_RELEASED : this.MouseActiveAreaReleasedHandler(id,lparam,dparam,sparam); break; //--- The cursor is within the window scrolling area, the mouse buttons are not clicked case MOUSE_EVENT_INSIDE_SCROLL_AREA_NOT_PRESSED : this.MouseScrollAreaNotPressedHandler(id,lparam,dparam,sparam);break; //--- The cursor is within the window scrolling area, any mouse button is clicked case MOUSE_EVENT_INSIDE_SCROLL_AREA_PRESSED : this.MouseScrollAreaPressedHandler(id,lparam,dparam,sparam); break; //--- The cursor is within the window scrolling area, the mouse wheel is being scrolled case MOUSE_EVENT_INSIDE_SCROLL_AREA_WHEEL : this.MouseScrollAreaWhellHandler(id,lparam,dparam,sparam); break; //--- MOUSE_EVENT_NO_EVENT default: break; } this.m_mouse_event_last=(ENUM_MOUSE_EVENT)id; } //+------------------------------------------------------------------+
Dessa forma, o método se torna mais legível, pois todo o código pode ser visualizado de uma só vez. No entanto, isso é uma questão de preferências e hábitos pessoais.
No manipulador do último evento do mouse, adicionaremos estruturas para processar novos estados anteriores.
//+------------------------------------------------------------------+ //| Last mouse event handler | //+------------------------------------------------------------------+ void CForm::OnMouseEventPostProcessing(void) { if(!this.IsVisible() || !this.Enabled()) return; ENUM_MOUSE_FORM_STATE state=this.GetMouseState(); switch(state) { //--- The cursor is outside the form, the mouse buttons are not clicked //--- The cursor is outside the form, any mouse button is clicked //--- The cursor is outside the form, the mouse wheel is being scrolled case MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED : case MOUSE_FORM_STATE_OUTSIDE_FORM_PRESSED : case MOUSE_FORM_STATE_OUTSIDE_FORM_WHEEL : case MOUSE_FORM_STATE_NONE : if(this.MouseEventLast()==MOUSE_EVENT_INSIDE_ACTIVE_AREA_NOT_PRESSED || this.MouseEventLast()==MOUSE_EVENT_INSIDE_FORM_NOT_PRESSED || this.MouseEventLast()==MOUSE_EVENT_OUTSIDE_FORM_NOT_PRESSED || this.MouseEventLast()==MOUSE_EVENT_NO_EVENT) { this.SetBackgroundColor(this.BackgroundColorInit(),false); this.SetBorderColor(this.BorderColorInit(),false); this.m_mouse_event_last=ENUM_MOUSE_EVENT(state+MOUSE_EVENT_NO_EVENT); } break; //--- The cursor is inside the form, the mouse buttons are not clicked //--- The cursor is inside the form, any mouse button is clicked //--- The cursor is inside the form, the mouse wheel is being scrolled //--- The cursor is inside the active area, the mouse buttons are not clicked //--- The cursor is inside the active area, any mouse button is clicked //--- The cursor is inside the active area, the mouse wheel is being scrolled //--- The cursor is inside the active area, left mouse button is released //--- The cursor is within the window scrolling area, the mouse buttons are not clicked //--- The cursor is within the window scrolling area, any mouse button is clicked //--- The cursor is within the window scrolling area, the mouse wheel is being scrolled //--- The cursor is within the window resizing area, the mouse buttons are not clicked //--- The cursor is within the window resizing area, the mouse button (any) is clicked //--- The cursor is within the window resizing area, the mouse wheel is being scrolled //--- The cursor is within the window resizing area, the mouse buttons are not clicked //--- The cursor is within the window resizing area, the mouse button (any) is clicked //--- The cursor is within the window separator area, the mouse wheel is being scrolled case MOUSE_FORM_STATE_INSIDE_FORM_NOT_PRESSED : case MOUSE_FORM_STATE_INSIDE_FORM_PRESSED : case MOUSE_FORM_STATE_INSIDE_FORM_WHEEL : case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_NOT_PRESSED : case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_PRESSED : case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_WHEEL : case MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_RELEASED : case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_NOT_PRESSED : case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_PRESSED : case MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_WHEEL : case MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_NOT_PRESSED : case MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_PRESSED : case MOUSE_FORM_STATE_INSIDE_RESIZE_AREA_WHEEL : case MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_NOT_PRESSED: case MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_PRESSED : case MOUSE_FORM_STATE_INSIDE_SPLITTER_AREA_WHEEL : break; //--- MOUSE_EVENT_NO_EVENT default: break; } } //+------------------------------------------------------------------+
Em seguida, pode ser necessário processar esses eventos que foram os últimos do mouse em relação ao objeto, então adicionamos imediatamente modelos de manipuladores desses eventos aqui. Neste momento, eles não são processados de forma alguma.
No arquivo de classe do objeto WinForms base \MQL5\Include\DoEasy\Objects\Graph\WForms\WinFormBase.mqh, no método que redesenha o objeto, vamos inserir uma verificação do sinalizador de exibição do objeto e, se o objeto não precisa ser exibido, também não será necessário redesenhá-lo:
//+------------------------------------------------------------------+ //| Redraw the object | //+------------------------------------------------------------------+ void CWinFormBase::Redraw(bool redraw) { //--- If the object type is less than the "Base WinForms object", exit if(this.TypeGraphElement()<GRAPH_ELEMENT_TYPE_WF_BASE || !this.Displayed()) return; //--- Get the "Shadow" object CShadowObj *shadow=this.GetShadowObj(); //--- If the object has a shadow and the "Shadow" object exists, redraw it if(this.IsShadow() && shadow!=NULL) { //--- remove the previously drawn shadow, shadow.Erase(); //--- save the relative shadow coordinates, int x=shadow.CoordXRelative(); int y=shadow.CoordYRelative(); //--- redraw the shadow, if(redraw) shadow.Draw(0,0,shadow.Blur(),redraw); //--- restore relative shadow coordinates shadow.SetCoordXRelative(x); shadow.SetCoordYRelative(y); } //--- If the redraw flag is set, if(redraw) { //--- completely redraw the object and save its new initial look this.Erase(this.m_array_colors_bg,this.Opacity(),this.m_gradient_v,this.m_gradient_c,redraw); this.Done(); } //--- otherwise, remove the object else this.Erase(); //--- Redraw all bound objects with the redraw flag for(int i=0;i<this.ElementsTotal();i++) { CWinFormBase *element=this.GetElement(i); if(element==NULL) continue; if(redraw) element.Redraw(redraw); } //--- If the redraw flag is set and if this is the main object the rest are bound to, //--- redraw the chart to display changes immediately if(redraw && this.GetMain()==NULL) ::ChartRedraw(this.ChartID()); } //+------------------------------------------------------------------+
No método que retorna a descrição da propriedade inteira do elemento, vamos adicionar um bloco de código para retornar descrições das novas propriedades do elemento gráfico:
//+------------------------------------------------------------------+ //| Return the description of the control integer property | //+------------------------------------------------------------------+ string CWinFormBase::GetPropertyDescription(ENUM_CANV_ELEMENT_PROP_INTEGER property,bool only_prop=false) { return ( property==CANV_ELEMENT_PROP_ID ? CMessage::Text(MSG_CANV_ELEMENT_PROP_ID)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_TYPE ? CMessage::Text(MSG_CANV_ELEMENT_PROP_TYPE)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+this.TypeElementDescription() ) : //---... //---... property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_CONTROL_AREA_X ? CMessage::Text(MSG_CANV_ELEMENT_PROP_CONTROL_AREA_X)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_CONTROL_AREA_Y ? CMessage::Text(MSG_CANV_ELEMENT_PROP_CONTROL_AREA_Y)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT ? CMessage::Text(MSG_CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH ? CMessage::Text(MSG_CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : property==CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE ? CMessage::Text(MSG_CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE)+ (only_prop ? "" : !this.SupportProperty(property) ? ": "+CMessage::Text(MSG_LIB_PROP_NOT_SUPPORTED) : ": "+(string)this.GetProperty(property) ) : "" ); } //+------------------------------------------------------------------+
Dependendo da propriedade passada para o método, uma string de descrição é criada e retornada. Se a propriedade não for suportada pelo objeto, em vez do valor da propriedade, será exibida uma entrada indicando que a propriedade não é suportada. Dependendo do valor do sinalizador only_prop, o código exibe apenas o nome da propriedade ou o nome da propriedade juntamente com o valor atribuído a ela.
Agora podemos começar a criar um novo objeto de biblioteca.
Classe do objeto separador auxiliar
Os objetos auxiliares da biblioteca não são controles completos por si mesmos, mas são usados para construir tais objetos. Precisamos do objeto separador para sinalizar que podemos mover a área que separa os dois painéis no controle SplitContainer. Ao mover este objeto com o mouse, chamaremos o manipulador de evento do elemento SplitContainer, onde este evento será processado e os tamanhos dos painéis serão alterados. Ao mesmo tempo, podemos precisar de tal objeto para interagir com outros controles, então ele será localizado na pasta de objetos auxiliares e usado em controles que precisam implementar sua funcionalidade.
Na pasta \MQL5\Include\DoEasy\Objects\Graph\WForms\Helpers\, criamos um novo arquivo Splitter.mqh da classe CSplitter.
A classe deve ser herdada da classe do objeto base da biblioteca WinForms, e seu arquivo deve ser incluído no arquivo da classe gerada:
//+------------------------------------------------------------------+ //| Splitter.mqh | //| Copyright 2022, MetaQuotes Ltd. | //| https://mql5.com/en/users/artmedia70 | //+------------------------------------------------------------------+ #property copyright "Copyright 2022, MetaQuotes Ltd." #property link "https://mql5.com/en/users/artmedia70" #property version "1.00" #property strict // Necessary for mql4 //+------------------------------------------------------------------+ //| Include files | //+------------------------------------------------------------------+ #include "..\WinFormBase.mqh" //+------------------------------------------------------------------+ //| Splitter object class of the WForms controls | //+------------------------------------------------------------------+ class CSplitter : public CWinFormBase { }
Na seção protegida da classe, declararemos um método virtual que desenha uma grade (hachura do objeto) e um construtor protegido. Na seção pública da classe, declararemos um construtor paramétrico e métodos para redesenhar e limpar o plano de fundo do elemento gráfico:
//+------------------------------------------------------------------+ //| Splitter object class of the WForms controls | //+------------------------------------------------------------------+ class CSplitter : public CWinFormBase { private: protected: //--- Draw the grid virtual void DrawGrid(void); //--- Protected constructor with object type, chart ID and subwindow CSplitter(const ENUM_GRAPH_ELEMENT_TYPE type, const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h); public: //--- Constructor CSplitter(const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h); //--- Redraw the object virtual void Redraw(bool redraw); //--- Clear the element filling it with color and opacity virtual void Erase(const color colour,const uchar opacity,const bool redraw=false); //--- Clear the element with a gradient fill virtual void Erase(color &colors[],const uchar opacity,const bool vgradient,const bool cycle,const bool redraw=false); }; //+------------------------------------------------------------------+
O método que desenha a grade do objeto é declarado como virtual para o caso de precisarmos criar classes derivadas com uma renderização diferente.
Vamos dar uma olhada nos métodos declarados.
Construtor protegido da classe:
//+------------------------------------------------------------------+ //| Protected constructor with an object type, | //| chart ID and subwindow | //+------------------------------------------------------------------+ CSplitter::CSplitter(const ENUM_GRAPH_ELEMENT_TYPE type, const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h) : CWinFormBase(type,chart_id,subwindow,descript,x,y,w,h) { //--- Set the specified graphical element type for the object and assign the library object type to the current object this.SetTypeElement(type); this.m_type=OBJECT_DE_TYPE_GWF_HELPER; this.SetPaddingAll(0); this.SetMarginAll(0); this.SetBorderSizeAll(0); } //+------------------------------------------------------------------+
Nos parâmetros formais do construtor, é passado o tipo do objeto criado, que é passado na linha de inicialização para o construtor da classe pai. No corpo da classe, o tipo do elemento gráfico passado para o construtor e o tipo do objeto gráfico da biblioteca são definidos como objeto auxiliar. Os tamanhos de Padding, Margin e moldura são definidos como zero.
Construtor paramétrico:
//+------------------------------------------------------------------+ //| Constructor | //+------------------------------------------------------------------+ CSplitter::CSplitter(const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h) : CWinFormBase(GRAPH_ELEMENT_TYPE_WF_SPLITTER,chart_id,subwindow,descript,x,y,w,h) { this.SetTypeElement(GRAPH_ELEMENT_TYPE_WF_SPLITTER); this.m_type=OBJECT_DE_TYPE_GWF_HELPER; this.SetPaddingAll(0); this.SetMarginAll(0); this.SetBorderSizeAll(0); this.SetDisplayed(false); } //+------------------------------------------------------------------+
Neste caso, tudo é semelhante ao construtor protegido, mas o tipo de elemento gráfico é especificado diretamente e não é passado como um parâmetro formal.
Método que redesenha o objeto:
//+------------------------------------------------------------------+ //| Redraw the object | //+------------------------------------------------------------------+ void CSplitter::Redraw(bool redraw) { //--- If the element should not be displayed (hidden inside another control), leave if(!this.Displayed()) return; //--- Fill the object with background color having transparency this.Erase(this.BackgroundColor(),this.Opacity(),true); } //+------------------------------------------------------------------+
Se o sinalizador de exibição do objeto for desativado em um elemento de controle visível e disponível para interação, não é necessário redesenhar o objeto - saímos do método. Se o sinalizador de exibição estiver definido, chamamos o método de preenchimento do objeto com cor.
Métodos que limpam um elemento preenchendo-o com cor e opacidade:
//+------------------------------------------------------------------+ //| Clear the element filling it with color and opacity | //+------------------------------------------------------------------+ void CSplitter::Erase(const color colour,const uchar opacity,const bool redraw=false) { //--- If the element should not be displayed (hidden inside another control), leave if(!this.Displayed()) return; //--- Fill the element having the specified color and the redrawing flag CGCnvElement::EraseNoCrop(colour,opacity,false); //--- Draw the grid this.DrawGrid(); //--- Crop and update the element with the specified redraw flag this.Crop(); this.Update(redraw); } //+------------------------------------------------------------------+ //| Clear the element with a gradient fill | //+------------------------------------------------------------------+ void CSplitter::Erase(color &colors[],const uchar opacity,const bool vgradient,const bool cycle,const bool redraw=false) { //--- If the element should not be displayed (hidden inside another control), leave if(!this.Displayed()) return; //--- Fill the element having the specified color array and the redrawing flag CGCnvElement::EraseNoCrop(colors,opacity,vgradient,cycle,false); //--- Draw the grid this.DrawGrid(); //--- Crop and update the element with the specified redraw flag this.Crop(); this.Update(redraw); } //+------------------------------------------------------------------+
A lógica do método está totalmente comentada no código. O primeiro método preenche o plano de fundo com uma única cor, o segundo com um gradiente.
Método que desenha a grade:
//+------------------------------------------------------------------+ //| Draw the grid | //+------------------------------------------------------------------+ void CSplitter::DrawGrid(void) { for(int y=0;y<this.Height()-1;y++) for(int x=0;x<this.Width();x++) this.SetPixel(x,y,this.ForeColor(),uchar(y%2==0 ? (x%2==0 ? 255 : 0) : (x%2==0 ? 0 : 255))); } //+------------------------------------------------------------------+
Precisamos preencher o fundo do objeto com pontos em um padrão quadriculado. Para fazer isso, realizamos dois laços: um por linhas e outro por colunas.
- Se a string for par, então:
- Se a coluna for par, colocamos um ponto com opacidade total,
- Se a coluna for ímpar, colocamos um ponto com total transparência.
- Se a string for ímpar, então:
- Se a coluna for par, colocamos um ponto com total transparência,
- Se a coluna for ímpar, colocamos um ponto com opacidade total.
Assim, preenchemos todo o fundo com pontos dispostos em um padrão quadriculado.
Isso é tudo o que é necessário neste estágio para que a classe de objeto separador funcione.
Agora precisamos anexá-lo na classe do controle SplitContainer, criá-lo e gerenciá-lo.
No arquivo \MQL5\Include\DoEasy\Objects\Graph\WForms\Containers\SplitContainer.mqh, na seção privada da classe, declararemos variáveis para armazenar as coordenadas e tamanhos de painéis e separador, e declararemos um método para configuração dos parâmetros do painel:
//+------------------------------------------------------------------+ //| SplitContainer.mqh | //| Copyright 2022, MetaQuotes Ltd. | //| https://mql5.com/en/users/artmedia70 | //+------------------------------------------------------------------+ #property copyright "Copyright 2022, MetaQuotes Ltd." #property link "https://mql5.com/en/users/artmedia70" #property version "1.00" #property strict // Necessary for mql4 //+------------------------------------------------------------------+ //| Include files | //+------------------------------------------------------------------+ #include "Container.mqh" #include "..\Helpers\SplitContainerPanel.mqh" #include "..\Helpers\Splitter.mqh" //+------------------------------------------------------------------+ //| SplitContainer WForms control object class | //+------------------------------------------------------------------+ class CSplitContainer : public CContainer { private: int m_panel1_x; // panel1 X coordinate int m_panel1_y; // panel1 Y coordinate int m_panel1_w; // panel1 width int m_panel1_h; // panel1 height int m_panel2_x; // panel2 X coordinate int m_panel2_y; // panel2 Y coordinate int m_panel2_w; // panel2 width int m_panel2_h; // panel2 height int m_splitter_x; // Separator X coordinate int m_splitter_y; // Separator Y coordinate int m_splitter_w; // separator width int m_splitter_h; // separator height //--- Create a new graphical object virtual CGCnvElement *CreateNewGObject(const ENUM_GRAPH_ELEMENT_TYPE type, const int element_num, const string descript, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool movable, const bool activity); //--- Set the panel parameters bool SetsPanelParams(void); public:
Na seção pública da classe, vamos declarar/escrever novos métodos, vamos mudar o tipo a ser retornado dos métodos para obtenção de ponteiros no painel (devido a erros de compilação durante a compilação separada do arquivo de classe CSplitContainerPanel) e vamos mover a implementação de alguns métodos fora da classe, deixando aqui apenas a declaração dos métodos:
public: //--- Create the panels void CreatePanels(void); //--- Returns pointer to the specified panel CWinFormBase *GetPanel(const int index) { return CForm::GetElement(index); } //--- Return the pointer to the (1) panel1 and (2) panel2 CWinFormBase *GetPanel1(void) { return this.GetPanel(0); } CWinFormBase *GetPanel2(void) { return this.GetPanel(1); } //--- Return the element from the specified panel (1) by index, (2) by type and index and (3) by name CGCnvElement *GetPanelElement(const int panel,const int index); CGCnvElement *GetPanelElementByType(const int panel,const ENUM_GRAPH_ELEMENT_TYPE type,const int index); CGCnvElement *GetPanelElementByName(const int panel,const string name); //--- Return the pointer to the separator CSplitter *GetSplitter(void) { return this.GetElementByType(GRAPH_ELEMENT_TYPE_WF_SPLITTER,0); } //--- (1) set and (2) return the minimum possible size of the panel 1 and 2 void SetPanel1MinSize(const int value) { this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE,value); } int Panel1MinSize(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_MIN_SIZE); } void SetPanel2MinSize(const int value) { this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE,value); } int Panel2MinSize(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_MIN_SIZE); } //--- (1) set and (2) return the flag of collapsed panel 1 void SetPanel1Collapsed(const int flag); bool Panel1Collapsed(void) const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED); } //--- (1) set and (2) return the flag of collapsed panel 2 void SetPanel2Collapsed(const int flag); bool Panel2Collapsed(void) const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED); } //--- (1) set and (2) return the separator distance from the edge void SetSplitterDistance(const int value); int SplitterDistance(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE); } //--- (1) set and (2) return the separator non-removability flag void SetSplitterFixed(const bool flag) { this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_FIXED,flag); } bool SplitterFixed(void) const { return (bool)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_FIXED); } //--- (1) set and (2) return the separator width void SetSplitterWidth(const int value); int SplitterWidth(void) const { return (int)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH); } //--- (1) set and (2) return the separator location void SetSplitterOrientation(const ENUM_CANV_ELEMENT_SPLITTER_ORIENTATION value) { this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION,value); } ENUM_CANV_ELEMENT_SPLITTER_ORIENTATION SplitterOrientation(void) const { return(ENUM_CANV_ELEMENT_SPLITTER_ORIENTATION)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_ORIENTATION); } //--- (1) set and (2) return the panel that does not change its size when the container is resized void SetFixedPanel(const ENUM_CANV_ELEMENT_SPLIT_CONTAINER_FIXED_PANEL value) { this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_FIXED_PANEL,value); } ENUM_CANV_ELEMENT_SPLIT_CONTAINER_FIXED_PANEL FixedPanel(void) const { return(ENUM_CANV_ELEMENT_SPLIT_CONTAINER_FIXED_PANEL)this.GetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_FIXED_PANEL); } //--- Create a new attached element on the specified panel bool CreateNewElement(const int panel_index, const ENUM_GRAPH_ELEMENT_TYPE element_type, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool activity, const bool redraw); //--- Event handler virtual void OnChartEvent(const int id,const long& lparam,const double& dparam,const string& sparam); //--- 'The cursor is inside the active area, the mouse buttons are not clicked' event handler virtual void MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam); //--- Constructor CSplitContainer(const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h); }; //+------------------------------------------------------------------+
No método que cria um novo objeto gráfico, vamos adicionar outro tipo de objeto que pode ser criado:
//+------------------------------------------------------------------+ //| Create a new graphical object | //+------------------------------------------------------------------+ CGCnvElement *CSplitContainer::CreateNewGObject(const ENUM_GRAPH_ELEMENT_TYPE type, const int obj_num, const string descript, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool movable, const bool activity) { CGCnvElement *element=NULL; switch(type) { case GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL : element=new CSplitContainerPanel(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_SPLITTER : element=new CSplitter(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; default : break; } if(element==NULL) ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),this.TypeElementDescription(type)); return element; } //+------------------------------------------------------------------+
Como agora precisamos criar um separador dentro do objeto, além dos painéis, o método deve ser capaz de fazer isso, a linha adicionada serve para criar um novo objeto separador.
No método que cria os painéis, vamos adicionar um bloco de código para criar um objeto separador:
//+------------------------------------------------------------------+ //| Create the panels | //+------------------------------------------------------------------+ void CSplitContainer::CreatePanels(void) { this.m_list_elements.Clear(); if(this.SetsPanelParams()) { if(!this.CreateNewElement(GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL,this.m_panel1_x,this.m_panel1_y,this.m_panel1_w,this.m_panel1_h,clrNONE,255,true,false)) return; if(!this.CreateNewElement(GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL,this.m_panel2_x,this.m_panel2_y,this.m_panel2_w,this.m_panel2_h,clrNONE,255,true,false)) return; //--- if(!this.CreateNewElement(GRAPH_ELEMENT_TYPE_WF_SPLITTER,this.m_splitter_x,this.m_splitter_y,this.m_splitter_w,this.m_splitter_h,clrNONE,255,true,false)) return; CSplitter *splitter=this.GetSplitter(); if(splitter!=NULL) { splitter.SetMovable(true); splitter.SetDisplayed(false); splitter.Hide(); } } } //+------------------------------------------------------------------+
Aqui: se não foi possível criar um objeto separador, saímos método. Em seguida, obtemos um ponteiro para o objeto separador criado, definimos o sinalizador de realocação para ele (ele também precisará ser movido com o mouse), definimos o sinalizador de que não precisa ser exibido e ocultamos o objeto criado.
A criação de painéis também é alterada. Agora, primeiro definimos o método SetsPanelParams() que é responsável por estabelecer as coordenadas e tamanhos iniciais dos painéis, dependendo da localização do separador e dos sinais de recolhimento dos painéis. Estes valores são então passados para os métodos de criação de painéis. Isso é feito antes de criarmos os objetos painéis para garantir que eles tenham as configurações corretas desde o início.
Método que define parâmetros dos painéis:
//+------------------------------------------------------------------+ //| Set the panel parameters | //+------------------------------------------------------------------+ bool CSplitContainer::SetsPanelParams(void) { switch(this.SplitterOrientation()) { //--- The separator is positioned vertically case CANV_ELEMENT_SPLITTER_ORIENTATION_VERTICAL : //--- If both panels are not collapsed, if(!this.Panel1Collapsed() && !this.Panel2Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.SplitterDistance(); this.m_panel1_h=this.Height(); //--- set the panel2 coordinates and size this.m_panel2_x=this.SplitterDistance()+this.SplitterWidth(); this.m_panel2_y=0; this.m_panel2_w=this.Width()-this.m_panel2_x; this.m_panel2_h=this.Height(); //--- write separator coordinates and size this.m_splitter_x=this.SplitterDistance(); this.m_splitter_y=0; this.m_splitter_w=this.SplitterWidth(); this.m_splitter_h=this.Height(); } //--- If panel2 is collapsed else if(this.Panel2Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.Width(); this.m_panel1_h=this.Height(); //--- set the panel2 coordinates and size this.m_panel2_x=this.SplitterDistance()+this.SplitterWidth(); this.m_panel2_y=0; this.m_panel2_w=this.Width()-this.m_panel2_x; this.m_panel2_h=this.Height(); //--- write separator coordinates and size this.m_splitter_x=-this.SplitterWidth(); this.m_splitter_y=0; this.m_splitter_w=this.SplitterWidth(); this.m_splitter_h=this.Height(); } //--- If panel1 is collapsed else if(this.Panel1Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.SplitterDistance(); this.m_panel1_h=this.Height(); //--- set the panel2 coordinates and size this.m_panel2_x=0; this.m_panel2_y=0; this.m_panel2_w=this.Width(); this.m_panel2_h=this.Height(); //--- write separator coordinates and size this.m_splitter_x=-this.SplitterWidth(); this.m_splitter_y=0; this.m_splitter_w=this.SplitterWidth(); this.m_splitter_h=this.Height(); } break; //--- The separator is located horizontally case CANV_ELEMENT_SPLITTER_ORIENTATION_HORISONTAL : if(!this.Panel1Collapsed() && !this.Panel2Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.Width(); this.m_panel1_h=this.SplitterDistance(); //--- set the panel2 coordinates and size this.m_panel2_x=0; this.m_panel2_y=this.SplitterDistance()+this.SplitterWidth(); this.m_panel2_w=this.Width(); this.m_panel2_h=this.Height()-this.m_panel2_y; //--- write separator coordinates and size this.m_splitter_x=0; this.m_splitter_y=this.SplitterDistance(); this.m_splitter_w=this.Width(); this.m_splitter_h=this.SplitterWidth(); } //--- If panel2 is collapsed else if(this.Panel2Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.Width(); this.m_panel1_h=this.Height(); //--- set the panel2 coordinates and size this.m_panel2_x=0; this.m_panel2_y=this.SplitterDistance()+this.SplitterWidth(); this.m_panel2_w=this.Width(); this.m_panel2_h=this.Height()-this.m_panel2_y; //--- write separator coordinates and size this.m_splitter_x=0; this.m_splitter_y=-this.SplitterDistance(); this.m_splitter_w=this.Width(); this.m_splitter_h=this.SplitterWidth(); } //--- If panel1 is collapsed else if(this.Panel1Collapsed()) { //--- set the panel1 coordinates and size this.m_panel1_x=0; this.m_panel1_y=0; this.m_panel1_w=this.Width(); this.m_panel1_h=this.SplitterDistance(); //--- set the panel2 coordinates and size this.m_panel2_x=0; this.m_panel2_y=0; this.m_panel2_w=this.Width(); this.m_panel2_h=this.Height(); //--- write separator coordinates and size this.m_splitter_x=0; this.m_splitter_y=-this.SplitterDistance(); this.m_splitter_w=this.Width(); this.m_splitter_h=this.SplitterWidth(); } break; default: return false; break; } //--- Set the coordinates and sizes of the control area equal to the properties set by the separator this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,this.m_splitter_x); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,this.m_splitter_y); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,this.m_splitter_w); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,this.m_splitter_h); return true; } //+------------------------------------------------------------------+
Dependendo da localização do separador (vertical ou horizontal) e dependendo de se ambos os painéis estão recolhidos ou um deles está recolhido, escrevemos as coordenadas e tamanhos dos painéis e do separador em variáveis auxiliares. No final do método, os parâmetros do separador definidos no método são escritos nas propriedades das coordenadas e das dimensões da área de controle.
Método que define o sinalizador de minimização do painel 1:
//+------------------------------------------------------------------+ //| Set the flag of collapsed panel 1 | //+------------------------------------------------------------------+ void CSplitContainer::SetPanel1Collapsed(const int flag) { //--- Set the flag, passed to the method, to the object property this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL1_COLLAPSED,flag); //--- If panel1 should be collapsed if(this.Panel1Collapsed()) { //--- set the expanded flag for panel2 this.SetPanel2Collapsed(false); //--- If the pointer to panel1 is received if(this.GetPanel1()!=NULL) { //--- set the flag for not displaying the panel and hide it this.GetPanel1().SetDisplayed(false); this.GetPanel1().Hide(); } //--- If the pointer to panel2 is received, if(this.GetPanel2()!=NULL) { //--- set the panel display flag, display it and bring it to the foreground this.GetPanel2().SetDisplayed(true); this.GetPanel2().Show(); this.GetPanel2().BringToTop(); } } } //+------------------------------------------------------------------+
O método é totalmente comentado no código. Este método define o sinalizador de minimização do painel 1. Se o sinalizador for definido como false, o painel 1 ficará oculto e o sinalizador de invisibilidade será definido. Ao mesmo tempo, o painel 2 é exibido e o sinalizador de visibilidade é colocado e é trazido para o primeiro plano. Isto permite alternar entre os painéis, escondendo um e exibindo o outro.
Método que define o sinalizador de minimização do painel 2:
//+------------------------------------------------------------------+ //| Set the flag of collapsed panel 2 | //+------------------------------------------------------------------+ void CSplitContainer::SetPanel2Collapsed(const int flag) { //--- Set the flag, passed to the method, to the object property this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_PANEL2_COLLAPSED,flag); //--- If panel2 should be collapsed, if(Panel2Collapsed()) { //--- set the expanded flag for panel1 this.SetPanel1Collapsed(false); //--- If the pointer to panel2 is received, if(this.GetPanel2()!=NULL) { //--- set the flag for not displaying the panel and hide it this.GetPanel2().SetDisplayed(false); this.GetPanel2().Hide(); } //--- If the pointer to panel1 is received if(this.GetPanel1()!=NULL) { //--- set the panel display flag, display it and bring it to the foreground this.GetPanel1().SetDisplayed(true); this.GetPanel1().Show(); this.GetPanel1().BringToTop(); } } } //+------------------------------------------------------------------+
A lógica do método é semelhante à discutida acima, mas se aplica ao painel 2.
Método que define a distância do separador em relaçã à borda:
//+------------------------------------------------------------------+ //| Set the separator distance from the edge | //+------------------------------------------------------------------+ void CSplitContainer::SetSplitterDistance(const int value) { //--- Set the value, passed to the method, to the object property this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_DISTANCE,value); //--- Depending on the direction of the separator (vertical or horizontal), //--- set the values to the coordinates of the object control area switch(this.SplitterOrientation()) { case CANV_ELEMENT_SPLITTER_ORIENTATION_VERTICAL : this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,this.SplitterDistance()); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,0); break; //---CANV_ELEMENT_SPLITTER_ORIENTATION_HORISONTAL default: this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,0); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,this.SplitterDistance()); break; } } //+------------------------------------------------------------------+
O local onde o separador é posicionado determina a origem das coordenadas da área de controle do objeto. Portanto, dependendo da orientação do separador, devemos escrever as coordenadas do separador na área de controle, pois ela é uma representação física dessa área virtual.
Método que define a espessura do separador:
//+------------------------------------------------------------------+ //| Set the separator width | //+------------------------------------------------------------------+ void CSplitContainer::SetSplitterWidth(const int value) { //--- Set the value, passed to the method, to the object property this.SetProperty(CANV_ELEMENT_PROP_SPLIT_CONTAINER_SPLITTER_WIDTH,value); //--- Depending on the direction of the separator (vertical or horizontal), //--- set the values to the object control area width and height switch(this.SplitterOrientation()) { case CANV_ELEMENT_SPLITTER_ORIENTATION_VERTICAL : this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,this.SplitterWidth()); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,this.Height()); break; //---CANV_ELEMENT_SPLITTER_ORIENTATION_HORISONTAL default: this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,this.Width()); this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,this.SplitterWidth()); break; } } //+------------------------------------------------------------------+
O método é o mesmo acima. Dependendo da orientação do separador, escrevemos as dimensões do separador na área de controle, para que ele exiba fisicamente essa área virtual.
Manipulador de eventos:
//+------------------------------------------------------------------+ //| Event handler | //+------------------------------------------------------------------+ void CSplitContainer::OnChartEvent(const int id,const long &lparam,const double &dparam,const string &sparam) { //--- Adjust subwindow Y shift CGCnvElement::OnChartEvent(id,lparam,dparam,sparam); //--- If the event ID is moving the separator if(id==WF_CONTROL_EVENT_SPLITTER_MOVE) { //--- Get the pointer to the separator object CSplitter *splitter=this.GetSplitter(); if(splitter==NULL) return; //--- Declare the variables for separator coordinates int x=(int)lparam; int y=(int)dparam; //--- Depending on the separator direction, switch(this.SplitterOrientation()) { //--- vertical position case CANV_ELEMENT_SPLITTER_ORIENTATION_VERTICAL : //--- Set the Y coordinate equal to the Y coordinate of the control element y=this.CoordY(); //--- Adjust the X coordinate so that the separator does not go beyond the control element //--- taking into account the resulting minimum width of the panels if(x<this.CoordX()+this.Panel1MinSize()) x=this.CoordX()+this.Panel1MinSize(); if(x>this.CoordX()+this.Width()-this.Panel2MinSize()-this.SplitterWidth()) x=this.CoordX()+this.Width()-this.Panel2MinSize()-this.SplitterWidth(); break; //---CANV_ELEMENT_SPLITTER_ORIENTATION_HORISONTAL //--- horizontal position of the separator default: //--- Set the X coordinate equal to the X coordinate of the control element x=this.CoordX(); //--- Adjust the Y coordinate so that the separator does not go beyond the control element //--- taking into account the resulting minimum height of the panels if(y<this.CoordY()+this.Panel1MinSize()) y=this.CoordY()+this.Panel1MinSize(); if(y>this.CoordY()+this.Height()-this.Panel2MinSize()-this.SplitterWidth()) y=this.CoordY()+this.Height()-this.Panel2MinSize()-this.SplitterWidth(); break; } //--- If the separator is shifted by the calculated coordinates, if(splitter.Move(x,y,true)) { //--- set the separator relative coordinates splitter.SetCoordXRelative(splitter.CoordX()-this.CoordX()); splitter.SetCoordYRelative(splitter.CoordY()-this.CoordY()); //--- Get the pointers to both panels CSplitContainerPanel *p1=this.GetPanel1(); CSplitContainerPanel *p2=this.GetPanel2(); if(p1==NULL || p2==NULL) return; //--- Depending on the direction of the separator, set its new coordinates this.SetSplitterDistance(!this.SplitterOrientation() ? splitter.CoordX()-this.CoordX() : splitter.CoordY()-this.CoordY()); //--- Set the panel new coordinates and sizes depending on the separator coordinates if(this.SetsPanelParams()) { //--- If panel 1 is resized successfully if(p1.Resize(this.m_panel1_w,this.m_panel1_h,true)) { //--- If panel 2 coordinates are changed to new ones if(p2.Move(this.CoordX()+this.m_panel2_x,this.CoordY()+this.m_panel2_y,true)) { //--- if panel 2 has been successfully resized, if(p2.Resize(this.m_panel2_w,this.m_panel2_h,true)) { //--- set new relative coordinates of panel 2 p2.SetCoordXRelative(p2.CoordX()-this.CoordX()); p2.SetCoordYRelative(p2.CoordY()-this.CoordY()); } } } } } } } //+------------------------------------------------------------------+
A lógica do método é descrita nos comentários ao código. Resumindo: o manipulador recebe o identificador do evento "Movimento do separador" e calcula as novas coordenadas e tamanhos dos painéis. O painel 1 sempre permanece em suas coordenadas e somente redimensiona conforme o divisor é movido. E o painel 2, além de redimensionar, também deve se mover após o separador, porque, afinal, suas coordenadas iniciais estão vinculadas a ele. Dessa forma, o tamanho do painel é redimensionado para que sempre permaneça dentro do seu contêiner quando movido além do separador.
Manipulador do evento “Cursor dentro da área ativa, botões do mouse não pressionados”:
//+------------------------------------------------------------------+ //| 'The cursor is inside the active area, | //| no mouse buttons are clicked' event handler | //+------------------------------------------------------------------+ void CSplitContainer::MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam) { //--- Get the pointer to the separator CSplitter *splitter=this.GetSplitter(); if(splitter==NULL) { ::Print(DFUN,CMessage::Text(MSG_ELM_LIST_ERR_FAILED_GET_GRAPH_ELEMENT_OBJ),": ",this.TypeElementDescription(GRAPH_ELEMENT_TYPE_WF_SPLITTER)); return; } //--- If the separator is not displayed if(!splitter.Displayed()) { //--- Enable the display of the separator, show and redraw it splitter.SetDisplayed(true); splitter.Show(); splitter.Redraw(true); } } //+------------------------------------------------------------------+
A lógica do método é descrita nos comentários ao código. Quando movemos o ponteiro do mouse sobre a área de controle, é gerado um evento que é enviado ao manipulador de eventos do mouse do objeto forma da classe CForm. Dentro do manipulador existe um redirecionamento para tratar cada evento em seu próprio método virtual. No objeto forma, todos esses métodos não fazem nada - eles devem ser substituídos em classes herdadas. O manipulador desta classe SplitContainer recebe um ponteiro para o objeto separador e, se ele não estiver sendo exibido (seu sinalizador de exibição estiver definido como false), o sinalizador de exibição é redefinido para true, o objeto é exibido e redesenhado. Isso garante que o separador fique sempre visível e dentro do contêiner enquanto é movido.
Vamos modificar um pouco a classe do objeto painel do controle SplitContainer.
No arquivo da classe \MQL5\Include\DoEasy\Objects\Graph\WForms\Helpers\SplitContainerPanel.mqh, na seção pública, escreveremos métodos para definir sinalizadores para minimizar o painel e declaramos um método para exibir o painel e o manipulador do evento "Cursor dentro da área ativa, botão do mouse não pressionado":
//+------------------------------------------------------------------+ //| SplitContainerPanel object class | //| of the SplitContainer WForms control | //+------------------------------------------------------------------+ class CSplitContainerPanel : public CContainer { private: //--- Create a new graphical object virtual CGCnvElement *CreateNewGObject(const ENUM_GRAPH_ELEMENT_TYPE type, const int element_num, const string descript, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool movable, const bool activity); protected: //--- Protected constructor with object type, chart ID and subwindow CSplitContainerPanel(const ENUM_GRAPH_ELEMENT_TYPE type, const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h); public: //--- (1) Set and (2) return the flag of collapsed panel void SetCollapsed(const bool flag) { this.SetDisplayed(!flag); } bool Collapsed(void) const { return !this.Displayed(); } //--- Display the panel virtual void Show(void); //--- Draw the panel frame virtual void DrawFrame(void); //--- Clear the element filling it with color and opacity virtual void Erase(const color colour,const uchar opacity,const bool redraw=false); //--- Clear the element with a gradient fill virtual void Erase(color &colors[],const uchar opacity,const bool vgradient,const bool cycle,const bool redraw=false); //--- 'The cursor is inside the active area, the mouse buttons are not clicked' event handler virtual void MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam); //--- Constructor CSplitContainerPanel(const long chart_id, const int subwindow, const string descript, const int x, const int y, const int w, const int h); }; //+------------------------------------------------------------------+
Os métodos SetCollapsed() e Collapsed() são o oposto dos métodos SetDisplayed() e Displayed(). Portanto, eles são chamados dentro dos métodos declarados, mas o sinalizador passado para o método ou retornado do método é invertido.
No método que cria um novo objeto gráfico, vamos adicionar a criação de um objeto separador:
//+------------------------------------------------------------------+ //| Create a new graphical object | //+------------------------------------------------------------------+ CGCnvElement *CSplitContainerPanel::CreateNewGObject(const ENUM_GRAPH_ELEMENT_TYPE type, const int obj_num, const string descript, const int x, const int y, const int w, const int h, const color colour, const uchar opacity, const bool movable, const bool activity) { CGCnvElement *element=NULL; switch(type) { case GRAPH_ELEMENT_TYPE_ELEMENT : element=new CGCnvElement(type,this.ID(),obj_num,this.ChartID(),this.SubWindow(),descript,x,y,w,h,colour,opacity,movable,activity); break; case GRAPH_ELEMENT_TYPE_FORM : element=new CForm(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_CONTAINER : element=new CContainer(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_GROUPBOX : element=new CGroupBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_PANEL : element=new CPanel(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_LABEL : element=new CLabel(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_CHECKBOX : element=new CCheckBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_RADIOBUTTON : element=new CRadioButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_BUTTON : element=new CButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_LIST_BOX : element=new CListBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_LIST_BOX_ITEM : element=new CListBoxItem(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_CHECKED_LIST_BOX : element=new CCheckedListBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_BUTTON_LIST_BOX : element=new CButtonListBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_TAB_HEADER : element=new CTabHeader(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_TAB_FIELD : element=new CTabField(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_TAB_CONTROL : element=new CTabControl(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON : element=new CArrowButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP : element=new CArrowUpButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_DOWN : element=new CArrowDownButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_LEFT : element=new CArrowLeftButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_RIGHT : element=new CArrowRightButton(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_UD_BOX : element=new CArrowUpDownBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTONS_LR_BOX : element=new CArrowLeftRightBox(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER : element=new CSplitContainer(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; case GRAPH_ELEMENT_TYPE_WF_SPLITTER : element=new CSplitter(this.ChartID(),this.SubWindow(),descript,x,y,w,h); break; default : break; } if(element==NULL) ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),this.TypeElementDescription(type)); return element; } //+------------------------------------------------------------------+
Todos os objetos contêineres devem ser capazes de criar qualquer tipo de objeto auxiliar que possam conter, mesmo que esses objetos auxiliares não tenham valor em si. Portanto, escrevemos a criação de todos os objetos existentes e novos em objetos contêineres, independentemente de qual categoria de objetos de biblioteca eles pertençam.
Método que exibe o painel:
//+------------------------------------------------------------------+ //| Display the panel | //+------------------------------------------------------------------+ void CSplitContainerPanel::Show(void) { //--- If the panel is collapsed, leave if(this.Collapsed()) return; //--- Display the panel and all objects attached to it CForm::Show(); } //+------------------------------------------------------------------+
Aqui, primeiro verificamos o sinalizador do painel minimizado e, se o painel estiver em estado minimizado, não há nada para exibir - saímos. Caso contrário, exibimos o painel usando o método da classe pai do objeto forma.
Manipulador do evento "Cursor dentro da área ativa, nenhum botão do mouse pressionado":
//+------------------------------------------------------------------+ //| 'The cursor is inside the active area, | //| no mouse buttons are clicked' event handler | //+------------------------------------------------------------------+ void CSplitContainerPanel::MouseActiveAreaNotPressedHandler(const int id,const long& lparam,const double& dparam,const string& sparam) { //--- Get the pointer to the base object CSplitContainer *base=this.GetBase(); if(base==NULL) return; //--- Get the pointer to the separator object from the base object CSplitter *splitter=base.GetSplitter(); if(splitter==NULL) { ::Print(DFUN,CMessage::Text(MSG_ELM_LIST_ERR_FAILED_GET_GRAPH_ELEMENT_OBJ),": ",this.TypeElementDescription(GRAPH_ELEMENT_TYPE_WF_SPLITTER)); return; } //--- If the separator is displayed if(splitter.Displayed()) { //--- Disable the display of the separator and hide it splitter.SetDisplayed(false); splitter.Hide(); } } //+------------------------------------------------------------------+
A lógica do método é comentada no código. Resumindo, quando o cursor é movido fora da área de controle do controle SplitContainer, ele imediatamente é colocado na área do primeiro ou segundo painel desse controle. Quer dizer, no objeto da classe CSplitContainer não podemos saber se o cursor saiu da área de controle, pois ele imediatamente se posiciona na área do objeto painel anexado ao contêiner. Mas nele, é acionado o evento de que o cursor está sobre a forma ou sobre sua área ativa. Para garantir que o cursor não saia da área de controle do objeto SplitContainer, é necessário obter um ponteiro para o separador a partir do objeto base e ocultá-lo. Isso é o que é feito aqui.
No arquivo \MQL5\Include\DoEasy\Objects\Graph\WForms\Containers\Container.mqh da classe do objeto contêiner, em seu método que define os parâmetros do objeto anexado, adicionamos um bloco de código para definir os parâmetros do novo objeto separador criado:
//+------------------------------------------------------------------+ //| Set parameters for the attached object | //+------------------------------------------------------------------+ void CContainer::SetObjParams(CWinFormBase *obj,const color colour) { obj.SetMain(this.GetMain()==NULL ? this.GetObject() : this.GetMain()); obj.SetBase(this.GetObject()); //--- Set the text color of the object to be the same as that of the base container obj.SetForeColor(this.ForeColor(),true); //--- If the created object is not a container, set the same group for it as the one for its base object if(obj.TypeGraphElement()<GRAPH_ELEMENT_TYPE_WF_CONTAINER || obj.TypeGraphElement()>GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER) obj.SetGroup(this.Group()); //--- Depending on the object type switch(obj.TypeGraphElement()) { //--- For the Container, Panel and GroupBox WinForms objects case GRAPH_ELEMENT_TYPE_WF_CONTAINER : case GRAPH_ELEMENT_TYPE_WF_PANEL : case GRAPH_ELEMENT_TYPE_WF_GROUPBOX : obj.SetBorderColor(obj.BackgroundColor(),true); break; //--- For "Label", "CheckBox" and "RadioButton" WinForms objects case GRAPH_ELEMENT_TYPE_WF_LABEL : case GRAPH_ELEMENT_TYPE_WF_CHECKBOX : case GRAPH_ELEMENT_TYPE_WF_RADIOBUTTON : obj.SetForeColor(colour==clrNONE ? this.ForeColor() : colour,true); obj.SetBorderColor(obj.ForeColor(),true); obj.SetBackgroundColor(CLR_CANV_NULL,true); obj.SetOpacity(0,false); break; //--- For "Button", "TabHeader", TabField and "ListBoxItem" WinForms objects case GRAPH_ELEMENT_TYPE_WF_BUTTON : case GRAPH_ELEMENT_TYPE_WF_TAB_HEADER : case GRAPH_ELEMENT_TYPE_WF_TAB_FIELD : case GRAPH_ELEMENT_TYPE_WF_LIST_BOX_ITEM : obj.SetForeColor(this.ForeColor(),true); obj.SetBackgroundColor(colour==clrNONE ? CLR_DEF_CONTROL_STD_BACK_COLOR : colour,true); obj.SetBorderColor(obj.ForeColor(),true); obj.SetBorderStyle(FRAME_STYLE_SIMPLE); break; //--- For "ListBox", "CheckedListBox" and "ButtonListBox" WinForms object case GRAPH_ELEMENT_TYPE_WF_LIST_BOX : case GRAPH_ELEMENT_TYPE_WF_CHECKED_LIST_BOX : case GRAPH_ELEMENT_TYPE_WF_BUTTON_LIST_BOX : obj.SetBackgroundColor(colour==clrNONE ? CLR_DEF_CONTROL_STD_BACK_COLOR : colour,true); obj.SetBorderColor(CLR_DEF_BORDER_COLOR,true); obj.SetForeColor(CLR_DEF_FORE_COLOR,true); break; //--- For "TabControl" WinForms object case GRAPH_ELEMENT_TYPE_WF_TAB_CONTROL : obj.SetBackgroundColor(colour==clrNONE ? CLR_DEF_CONTROL_TAB_BACK_COLOR : colour,true); obj.SetBorderColor(CLR_DEF_CONTROL_TAB_BORDER_COLOR,true); obj.SetForeColor(CLR_DEF_FORE_COLOR,true); obj.SetOpacity(CLR_DEF_CONTROL_TAB_OPACITY); break; //--- For "SplitContainer" WinForms object case GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER : obj.SetBackgroundColor(colour==clrNONE ? CLR_CANV_NULL : colour,true); obj.SetBorderColor(CLR_CANV_NULL,true); obj.SetForeColor(CLR_DEF_FORE_COLOR,true); obj.SetOpacity(0); break; //--- For "SplitContainerPanel" WinForms object case GRAPH_ELEMENT_TYPE_WF_SPLIT_CONTAINER_PANEL: obj.SetBackgroundColor(colour==clrNONE ? CLR_DEF_CONTROL_SPLIT_CONTAINER_BACK_COLOR : colour,true); obj.SetBorderColor(CLR_DEF_CONTROL_SPLIT_CONTAINER_BORDER_COLOR,true); obj.SetForeColor(CLR_DEF_FORE_COLOR,true); break; //--- For "Splitter" WinForms object case GRAPH_ELEMENT_TYPE_WF_SPLITTER : obj.SetBackgroundColor(colour==clrNONE ? CLR_CANV_NULL : colour,true); obj.SetBorderColor(CLR_CANV_NULL,true); obj.SetForeColor(CLR_DEF_FORE_COLOR,true); obj.SetOpacity(0); obj.SetDisplayed(false); obj.Hide(); break; //--- For the "ArrowButton" WinForms object case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON : case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_UP : case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_DOWN : case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_LEFT : case GRAPH_ELEMENT_TYPE_WF_ARROW_BUTTON_RIGHT : obj.SetBorderColor(CLR_DEF_CONTROL_TAB_HEAD_BORDER_COLOR,true); obj.SetBorderStyle(FRAME_STYLE_SIMPLE); break; default: break; } obj.Crop(); } //+------------------------------------------------------------------+
Para o objeto separador recém-criado, configuramos a cor de fundo transparente (usando a cor "clrNONE" como parâmetro para o método), a cor da borda também é definida como transparente, tornamos o objeto totalmente transparente, desativamos a exibição dele e escondemos o objeto recém-criado - inicialmente, o objeto separador não deve ser visível.
No arquivo \MQL5\Include\DoEasy\Collections\GraphElementsCollection.mqh da classe coleção de elementos gráficos, adicionamos um bloco de código ao seu manipulador de eventos para processar o movimento do objeto separador:
//--- In case of the mouse movement event if(id==CHARTEVENT_MOUSE_MOVE) { //--- If the cursor is above the form if(form!=NULL) { //--- If the move flag is set if(move) { //--- calculate the cursor movement relative to the form coordinate origin int x=this.m_mouse.CoordX()-form.OffsetX(); int y=this.m_mouse.CoordY()-form.OffsetY(); //--- get the width and height of the chart the form is located at int chart_width=(int)::ChartGetInteger(form.ChartID(),CHART_WIDTH_IN_PIXELS,form.SubWindow()); int chart_height=(int)::ChartGetInteger(form.ChartID(),CHART_HEIGHT_IN_PIXELS,form.SubWindow()); //--- If the form is not within an extended standard graphical object if(form_index==WRONG_VALUE) { //--- If the form is a separator object, if(form.TypeGraphElement()==GRAPH_ELEMENT_TYPE_WF_SPLITTER) { //--- get its base object CWinFormBase *base=form.GetBase(); if(base==NULL) return; //--- and send the "Separator movement" event to the event handler of the base object const long lp=x; const double dp=y; base.OnChartEvent(WF_CONTROL_EVENT_SPLITTER_MOVE,lp,dp,sparam); } //--- Adjust the calculated form coordinates if the form is out of the chart range if(x<0) x=0; if(x>chart_width-form.Width()) x=chart_width-form.Width(); if(y<0) y=0; if(y>chart_height-form.Height()) y=chart_height-form.Height(); //--- If the one-click trading panel is not present on the chart, if(!::ChartGetInteger(form.ChartID(),CHART_SHOW_ONE_CLICK)) { //--- calculate the form coordinates so that the form does not overlap with the one-click trading panel button
No método, dentro do bloco de processamento do movimento do objeto gráfico, verificamos o tipo do objeto que está sendo movido, e se for um objeto separador, então chamamos o seu manipulador de eventos, enviando para ele o evento WF_CONTROL_EVENT_SPLITTER_MOVE. Dentro do manipulador de eventos deste elemento gráfico, este evento é processado conforme discutimos acima.
Hoje, todas essas são mudanças e melhorias na biblioteca.
Vamos testar o que temos.
Teste
Para testar, vamos pegar o Expert Advisor do artigo anterior e salvá-lo na nova pasta \MQL5\Experts\TestDoEasy\Part121\ com o novo nome TestDoEasy121.mq5.
Tudo o que precisa ser alterado no EA são as coordenadas e tamanhos dos rótulos de texto nos painéis do controle SplitContainer:
//--- On each of the control panels... for(int j=0;j<2;j++) { CSplitContainerPanel *panel=split_container.GetPanel(j); if(panel==NULL) continue; //--- ...create a text label with the panel name if(split_container.CreateNewElement(j,GRAPH_ELEMENT_TYPE_WF_LABEL,3,3,panel.Width()-6,panel.Height()-6,clrDodgerBlue,255,true,false)) { CLabel *label=split_container.GetPanelElementByType(j,GRAPH_ELEMENT_TYPE_WF_LABEL,0); if(label==NULL) continue; label.SetTextAlign(ANCHOR_CENTER); label.SetText(TextByLanguage("Панель","Panel")+string(j+1)); } }
Por que assim e não de outro modo? Simplesmente, se os tamanhos dos rótulos de texto corresponderem às dimensões dos painéis nos quais são criados, quando o cursor sair da área de controle, o cursor não irá para a área do painel, mas irá imediatamente para a área do rótulo. Assim, o objeto separador não pode ser ocultado. Isso é uma falha e precisa de uma solução. Vamos resolver isso, mas conforme o controle SplitContainer evolui.
Compilamos o Expert Advisor e o iniciamos no gráfico:
Basicamente, o código está funcionando satisfatoriamente, mas há atrasos na atualização da tela. Infelizmente, não posso testar o motivo exato desses atrasos no meu antigo laptop de baixo desempenho. Pode ser que o laptop esteja sobrecarregado e não consiga atualizar suavemente as alterações nas coordenadas e nos tamanhos dos painéis, ou pode ser que seja necessário otimizar o código em algum lugar. No entanto, percebi que esses atrasos nem sempre ocorrem comigo. De qualquer forma, o código da biblioteca será otimizado após o desenvolvimento do controle. Além disso, notei que o objeto-separador nem sempre é exibido/ocultado de forma confiável. Isso também será resolvido durante o desenvolvimento do controle.
O que virá a seguir?
No próximo artigo, continuaremos desenvolvendo o controle SplitContainer e começaremos a criar funcionalidades para alterar os parâmetros do controle existente.
Todos os arquivos da versão atual da biblioteca, os arquivos do EA de teste e o indicador do controle de eventos dos gráficos para MQL5 estão anexados abaixo. Você pode baixá-los e testar tudo sozinho. Se você tiver dúvidas, comentários e sugestões, pode colocá-los nos comentários do artigo.
*Artigos desta série:
DoEasy. Controles (Parte 13): Otimizando a interação de objetos WinForms com o mouse, dando início ao desenvolvimento do objeto WinForms TabControl
DoEasy. Controles (Parte 14): Novo algoritmo para nomear elementos gráficos. Continuando o trabalho no objeto WinForms TabControl
DoEasy. Controles (Parte 15): Objeto WinForms TabControl - múltiplas fileiras de cabeçalhos de guias, métodos de manuseio de guias
DoEasy. Controles (Parte 16): Objeto WinForms TabControl - múltiplas fileiras de cabeçalhos de guias, modo esticamento de cabeçalhos consoante o tamanho do contêiner
DoEasy. Controles (Parte 17): Recorte de seções invisíveis de objetos, objetos-botões WinForms auxiliares com setas
DoEasy. Controles (Parte 18): Preparando a funcionalidade para rolagem de guias no TabControl
DoEasy. Controles (Parte 19): Guias de rolagem no elemento TabControl, eventos de objetos WinForms
DoEasy. Controles (Parte 20): Objeto WinForms SplitContainer
Traduzido do russo pela MetaQuotes Ltd.
Artigo original: https://www.mql5.com/ru/articles/11564
Arquivos anexados |
MQL5.zip
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Aviso: Todos os direitos sobre esses materiais pertencem à MetaQuotes Ltd. É proibida a reimpressão total ou parcial.
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