Discussion of article "Graphical Interfaces I: Form for Controls (Chapter 2)"
Greetings Anatoly, I didn't see any methods for saving, loading form parameters (position, state...) in the base class. Are you planning to add such methods in the future, taking into account the type of forms?
Ruslan Khasanov:
Greetings Anatoly, I didn't see any methods for saving, loading form parameters (position, state...) in the base class. Are you planning to add such methods in the future, taking into account the type of forms?
Greetings Anatoly, I didn't see any methods for saving, loading form parameters (position, state...) in the base class. Are you planning to add such methods in the future, taking into account the type of forms?
Such an article is planned. But in my version, which parameters to save and load will be determined by the developer of MQL-application.
Good afternoon. Anatoly, of course I want to express my deepest respect for your labour and the work you have done. But I have a question while testing the library on the example of an Expert Advisor. Why is the window colour black, while all the colours of the elements that make up the window are set as LightGray by default? Isn't there a colour overlap somewhere, which results in a black window? I attach a screenshot:
Pavel Trofimov:
Good afternoon. Anatoly, of course I want to express my deepest respect for your labour and the work you have done. But I have a question while testing the library on the example of an Expert Advisor. Why is the window colour black, while all the colours of the elements that make up the window are set as LightGray by default? Isn't there a colour overlap somewhere, which results in a black window? I have attached a screenshot:
You can see the default colours of the form in the constructor of the CWindow class (file Window.mqh).
If you need to change the colours of the form, use the corresponding methods of the CWindow class. Properties of the form are set before its creation.
This example was shown in the article:
//+------------------------------------------------------------------+ //|| Creates a form for the | controls //+------------------------------------------------------------------+ bool CProgram::CreateWindow(const string caption_text) { //--- Add the window pointer to the window array CWndContainer::AddWindow(m_window); //--- Properties m_window.XSize(200); m_window.YSize(200); m_window.WindowBgColor(clrWhiteSmoke); m_window.WindowBorderColor(clrLightSteelBlue); m_window.CaptionBgColor(clrLightSteelBlue); m_window.CaptionBgColorHover(C'200,210,225'); //--- Form creation if(!m_window.CreateWindow(m_chart_id,m_subwin,caption_text,1,1)) return(false); //--- return(true); }
//---
Result:
Thanks for the clarification!
I couldn't find a method that changed the colour of the Header text, so I decided to add in window.mqh:
//--- Header properties
string m_caption_text;
int m_caption_height;
color m_caption_text_color;
color m_caption_bg_color;
color m_caption_bg_color_off;
color m_caption_bg_color_hover;
color m_caption_color_bg_array[];
string m_caption_text;
int m_caption_height;
color m_caption_text_color;
color m_caption_bg_color;
color m_caption_bg_color_off;
color m_caption_bg_color_hover;
color m_caption_color_bg_array[];
And methods:
void CaptionTextColor(const color text_color) { m_caption_text_color=text_color; }
color CaptionTextColor(void) const { return(m_caption_text_color); }
color CaptionTextColor(void) const { return(m_caption_text_color); }
Well and this method changes accordingly:
//+------------------------------------------------------------------+
//|| Creates a header text label|
//+------------------------------------------------------------------+
bool CWindow::CreateLabel(void)
{
string name=CElementBase::ProgramName()+"_window_label_"+(string)CElementBase::Id();
//--- Object coordinates
int x=CElementBase::X()+m_label_x_gap;
int y=CElementBase::Y()+m_label_y_gap;
//--- Set the text label
if(!m_label.Create(m_chart_id,name,m_subwin,x,y))
return(false);
//--- Set properties
m_label.Description(m_caption_text);
m_label.Font(CElementBase::Font());
m_label.FontSize(CElementBase::FontSize());
m_label.Color(m_caption_text_color);
m_label.Corner(m_corner);
m_label.Selectable(false);
m_label.Z_Order(m_button_zorder);
m_label.Tooltip("\n");
//--- Save the coordinates
m_label.X(x);
m_label.Y(y);
//--- Indents from the end point
m_label.XGap(x-m_x);
m_label.YGap(y-m_y);
//--- Save dimensions
m_label.XSize(m_label.X_Size());
m_label.YSize(m_label.Y_Size());
//--- Save the object pointer
CElementBase::AddToArray(m_label);
return(true);
}
//|| Creates a header text label|
//+------------------------------------------------------------------+
bool CWindow::CreateLabel(void)
{
string name=CElementBase::ProgramName()+"_window_label_"+(string)CElementBase::Id();
//--- Object coordinates
int x=CElementBase::X()+m_label_x_gap;
int y=CElementBase::Y()+m_label_y_gap;
//--- Set the text label
if(!m_label.Create(m_chart_id,name,m_subwin,x,y))
return(false);
//--- Set properties
m_label.Description(m_caption_text);
m_label.Font(CElementBase::Font());
m_label.FontSize(CElementBase::FontSize());
m_label.Color(m_caption_text_color);
m_label.Corner(m_corner);
m_label.Selectable(false);
m_label.Z_Order(m_button_zorder);
m_label.Tooltip("\n");
//--- Save the coordinates
m_label.X(x);
m_label.Y(y);
//--- Indents from the end point
m_label.XGap(x-m_x);
m_label.YGap(y-m_y);
//--- Save dimensions
m_label.XSize(m_label.X_Size());
m_label.YSize(m_label.Y_Size());
//--- Save the object pointer
CElementBase::AddToArray(m_label);
return(true);
}
Alexander Fedosov:
I couldn't find a method that changed the colour of the Header text, so I decided to add in window.mqh:
Good. I will also add this feature in one of the next articles.
The latest version of the library can be downloaded in this article: GUIs X: New features for a drawn table (build 9).
Hello Mr. Anatoli, your articles are so nice and the coding are impressive.
I need a help to build my panel on the chart. Can you please help me?
Thanks.
HI. I would like to ask how I can fix all these errors. Thank you
'Window.mqh' Window.mqh 1 1 'Element.mqh' Element.mqh 1 1 'Objects.mqh' Objects.mqh 1 1 'Enums.mqh' Enums.mqh 1 1 'Defines.mqh' Defines.mqh 1 1 'ChartObjectsBmpControls.mqh' ChartObjectsBmpControls.mqh 1 1 'ChartObject.mqh' ChartObject.mqh 1 1 'Object.mqh' Object.mqh 1 1 'StdLibErr.mqh' StdLibErr.mqh 1 1 'ChartObjectsTxtControls.mqh' ChartObjectsTxtControls.mqh 1 1 'Colors.mqh' Colors.mqh 1 1 undefined class 'CBmpLabel' cannot be used Window.mqh 25 15 see declaration of class 'CBmpLabel' Objects.mqh 20 7 undefined class 'CLabel' cannot be used Window.mqh 26 12 see declaration of class 'CLabel' Objects.mqh 19 7 undefined class 'CBmpLabel' cannot be used Window.mqh 27 15 see declaration of class 'CBmpLabel' Objects.mqh 20 7 undefined class 'CBmpLabel' cannot be used Window.mqh 28 15 see declaration of class 'CBmpLabel' Objects.mqh 20 7 undefined class 'CBmpLabel' cannot be used Window.mqh 29 15 see declaration of class 'CBmpLabel' Objects.mqh 20 7 undefined class 'CBmpLabel' cannot be used Window.mqh 30 15 see declaration of class 'CBmpLabel' Objects.mqh 20 7 'ENUM_WINDOW_TYPE' - unexpected token, probably type is missing? Window.mqh 36 5 'm_window_type' - semicolon expected Window.mqh 36 22 'ENUM_WINDOW_TYPE' - unexpected token, probably type is missing? Window.mqh 99 5 'WindowType' - semicolon expected Window.mqh 99 23 'void' - name expected Window.mqh 102 5 '}' - expressions are not allowed on a global scope Window.mqh 104 5 'const' modifier not allowed for nonmember functions Window.mqh 118 28 'const' modifier not allowed for nonmember functions Window.mqh 126 30 'const' modifier not allowed for nonmember functions Window.mqh 132 29 'const' modifier not allowed for nonmember functions Window.mqh 138 32 'const' modifier not allowed for nonmember functions Window.mqh 144 37 'public' - unexpected token, probably type is missing? Window.mqh 168 3 'long' - unexpected token, probably type is missing? Window.mqh 170 46 'double' - unexpected token, probably type is missing? Window.mqh 170 66 'string' - unexpected token, probably type is missing? Window.mqh 170 88 'virtual' - unexpected token Window.mqh 172 5 'virtual' - unexpected token Window.mqh 174 5 'virtual' - unexpected token Window.mqh 176 5 'virtual' - unexpected token Window.mqh 177 5 'virtual' - unexpected token Window.mqh 178 5 'virtual' - unexpected token Window.mqh 179 5 'virtual' - unexpected token Window.mqh 181 5 'virtual' - unexpected token Window.mqh 182 5 '}' - expressions are not allowed on a global scope Window.mqh 183 1 'RollUpSubwindowMode' - member function not defined Window.mqh 222 15 'ChangeSubwindowHeight' - member function not defined Window.mqh 235 15 'Hide' - member function not defined Window.mqh 294 15 'DefaultIcon' - member function not defined Window.mqh 362 17 'advisor.bmp' as resource "::Images\EasyAndFastGUI\Icons\bmp16\advisor.bmp" advisor.bmp 1 1 'indicator.bmp' as resource "::Images\EasyAndFastGUI\Icons\bmp16\indicator.bmp" indicator.bmp 1 1 'script.bmp' as resource "::Images\EasyAndFastGUI\Icons\bmp16\script.bmp" script.bmp 1 1 'm_window_type' - struct member undefined Window.mqh 193 5 'm_chart' - undeclared identifier Window.mqh 210 5 'SetWindowProperties' - undeclared identifier Window.mqh 212 5 ')' - expression expected Window.mqh 212 25 'm_window_type' - undeclared identifier Window.mqh 286 8 'W_DIALOG' - undeclared identifier Window.mqh 286 25 '.' - struct or class type expected Window.mqh 396 15 'Create' - undeclared identifier Window.mqh 396 16 'Create' - some operator expected Window.mqh 396 16 '(' - unbalanced left parenthesis Window.mqh 396 7 ',' - unexpected token Window.mqh 396 33 'name' - some operator expected Window.mqh 396 35 expression has no effect Window.mqh 396 23 ',' - unexpected token Window.mqh 396 49 expression has no effect Window.mqh 396 41 ',' - unexpected token Window.mqh 396 52 expression has no effect Window.mqh 396 51 ')' - unexpected token Window.mqh 396 55 expression has no effect Window.mqh 396 54 ')' - unexpected token Window.mqh 396 56 '.' - struct or class type expected Window.mqh 402 11 'BmpFileOn' - undeclared identifier Window.mqh 402 12 'BmpFileOn' - some operator expected Window.mqh 402 12 ')' - unexpected token Window.mqh 402 40 expression has no effect Window.mqh 402 27 '.' - struct or class type expected Window.mqh 403 11 'BmpFileOff' - undeclared identifier Window.mqh 403 12 'BmpFileOff' - some operator expected Window.mqh 403 12 ')' - unexpected token Window.mqh 403 41 expression has no effect Window.mqh 403 28 '.' - struct or class type expected Window.mqh 404 11 'Corner' - undeclared identifier Window.mqh 404 12 'Corner' - some operator expected Window.mqh 404 12 ')' - unexpected token Window.mqh 404 27 expression has no effect Window.mqh 404 19 '.' - struct or class type expected Window.mqh 405 11 'Selectable' - undeclared identifier Window.mqh 405 12 'Selectable' - some operator expected Window.mqh 405 12 ')' - unexpected token Window.mqh 405 28 expression has no effect Window.mqh 405 23 '.' - struct or class type expected Window.mqh 406 11 'Z_Order' - undeclared identifier Window.mqh 406 12 'Z_Order' - some operator expected Window.mqh 406 12 ')' - unexpected token Window.mqh 406 35 expression has no effect Window.mqh 406 20 '.' - struct or class type expected Window.mqh 407 11 'Tooltip' - undeclared identifier Window.mqh 407 12 'Tooltip' - some operator expected Window.mqh 407 12 ')' - unexpected token Window.mqh 407 24 expression has no effect Window.mqh 407 21 '.' - struct or class type expected Window.mqh 409 11 'X' - some operator expected Window.mqh 409 12 '.' - struct or class type expected Window.mqh 410 11 'Y' - some operator expected Window.mqh 410 12 '.' - struct or class type expected Window.mqh 412 11 'XGap' - some operator expected Window.mqh 412 12 '.' - struct or class type expected Window.mqh 413 11 'YGap' - some operator expected Window.mqh 413 12 '.' - struct or class type expected Window.mqh 415 11 '.' - struct or class type expected Window.mqh 415 24 'X_Size' - undeclared identifier Window.mqh 415 25 'X_Size' - some operator expected Window.mqh 415 25 '(' - unexpected token Window.mqh 415 31 'XSize' - some operator expected Window.mqh 415 12 '.' - struct or class type expected Window.mqh 416 11 '.' - struct or class type expected Window.mqh 416 24 'Y_Size' - undeclared identifier Window.mqh 416 25 'Y_Size' - some operator expected Window.mqh 416 25 '(' - unexpected token Window.mqh 416 31 'YSize' - some operator expected Window.mqh 416 12 'm_icon' - parameter conversion not allowed Window.mqh 418 26 void CElement::AddToArray(CChartObject&) Element.mqh 195 10 'm_icon_file' - undeclared identifier Window.mqh 109 9 'm_tooltips_button' - undeclared identifier Window.mqh 112 9 'm_right_limit' - undeclared identifier Window.mqh 115 9 'm_is_minimized' - undeclared identifier Window.mqh 119 16 expression not boolean Window.mqh 119 16 'm_is_minimized' - undeclared identifier Window.mqh 122 9 100 errors, 11 warnings 101 12
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New article Graphical Interfaces I: Form for Controls (Chapter 2) has been published:
This article is the continuation of the first part of the series about graphical interfaces. The first article Graphical Interfaces I: Preparation of the Library Structure (Chapter 1) considers in detail what this library is for. A full list of the links to the articles of the first part is at the end of each chapter. There you can also find and download a complete version of the library at the current stage of development. The files must be located in the same directories as in the archive.
In the previous chapter we discussed a library structure for creating graphical interfaces. There (1) derived classes for primitive objects, (2) a base class for all controls, (3) principle classes for storing control pointers and managing those controls in the common event handler were created.
In this article we shall create the first and main element of the graphical interface — a form for controls. Multiple controls can be attached to this form anywhere and in any combination. The form will be movable and all controls attached to it will be moved together with it.
What parts will constitute the window that we are going to create?
Fig. 1. Compound parts of the form for controls
Author: Anatoli Kazharski