Discussão do artigo "Outras classes na biblioteca DoEasy (Parte 67): classe de objeto-gráfico"

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Novo artigo Outras classes na biblioteca DoEasy (Parte 67): classe de objeto-gráfico foi publicado:

Neste artigo, vamos criar uma classe de um objeto-gráfico (um gráfico de um instrumento de negociação) e modificar a classe-coleção de objetos de sinal mql5 para que cada objeto-sinal armazenado na coleção também atualize todos os seus parâmetros quando a lista é atualizada.

Vamos compilar o Expert Advisor, abrir três gráficos no terminal e iniciar o Expert Advisor no primeiro deles, tendo especificado anteriormente nos parâmetros "trabalhar apenas com o símbolo atual e período gráfico":


Quando aparece o primeiro tick, o EA irá criar três objetos-gráficos e exibir no log, além de mensagens sobre a inicialização de várias classes da biblioteca, bem como breves descrições dos três objetos-gráficos criados:

Chart window EURUSD H4 ID: 131733844391938630, HWND: 918600
Chart window AUDUSD H1 ID: 131733844391938632, HWND: 1182638
Chart window GBPUSD H4 ID: 131733844391938633, HWND: 1705036

Em seguida, ele exibirá uma descrição completa de todas as propriedades do objeto-gráfico, descrevendo o primeiro gráfico do terminal:

============= The beginning of the parameter list (Chart window EURUSD H4) =============
Chart ID: 131733844391938630
Timeframe: H4
Drawing attributes of a price chart: Yes
Object "Chart": No
Chart on top of other charts: No
Accessing the context menu by pressing the right mouse button: Yes
Accessing the "Crosshair tool" by pressing the middle mouse button: Yes
Scrolling the chart horizontally using the left mouse button: Yes
Sending messages about mouse wheel events to all mql5 programs on a chart: No
Send notifications of mouse move and mouse click events to all mql5 programs on a chart: No
Send a notification of an event of new object creation to all mql5-programs on a chart: No
Send a notification of an event of object deletion to all mql5-programs on a chart: No
Chart type: Display as Japanese candlesticks
Price chart in the foreground: No
Price chart indent from the right border: Yes
Automatic moving to the right border of the chart: Yes
Managing the chart using a keyboard: Yes
Allowed to intercept Space and Enter key presses on the chart to activate the quick navigation bar: Yes
Scale: 2
Fixed scale mode: No
Scale 1:1 mode: No
Scale to be specified in points per bar: No
Display a symbol ticker in the upper left corner: Yes
Display OHLC values in the upper left corner: Yes
Display Bid values as a horizontal line in a chart: Yes
Display Ask values as a horizontal line in a chart: Yes
Display Last values as a horizontal line in a chart: No
Display vertical separators between adjacent periods: No
Display grid in the chart: No
Display volume in the chart: Tick volumes
Display textual descriptions of objects: Yes
The number of bars on the chart that can be displayed: 96
The total number of chart windows, including indicator subwindows: 1
Chart window handle: 918600
Number of the first visible bar in the chart: 95
Chart width in bars: 117
Chart width in pixels: 466
Chart background color: clrWhite
Color of axes, scales and OHLC line: clrBlack
Grid color: clrSilver
Color of volumes and position opening levels: clrGreen
Color for the up bar, shadows and body borders of bull candlesticks: clrBlack
Color for the down bar, shadows and body borders of bear candlesticks: clrBlack
Line chart color and color of "Doji" Japanese candlesticks: clrBlack
Body color of a bull candlestick: clrWhite
Body color of a bear candlestick: clrBlack
Bid price level color: clrLightSkyBlue
Ask price level color: clrCoral
Line color of the last executed deal price (Last): clrSilver
Color of stop order levels (Stop Loss and Take Profit): clrOrangeRed
Displaying trade levels in the chart (levels of open positions, Stop Loss, Take Profit and pending orders): Yes
Permission to drag trading levels on a chart with a mouse: Yes
Showing the time scale on a chart: Yes
Showing the price scale on a chart: Yes
Showing the "One click trading" panel on a chart: No
Chart window is maximized: No
Chart window is minimized: No
The chart window is docked: Yes
The left coordinate of the undocked chart window relative to the virtual screen: 0
The top coordinate of the undocked chart window relative to the virtual screen: 0
The right coordinate of the undocked chart window relative to the virtual screen: 0
The bottom coordinate of the undocked chart window relative to the virtual screen: 0
------
The size of the zero bar indent from the right border in percents: 18.63
Chart fixed position from the left border in percent value: 0.00
Fixed  chart maximum: 1.22650
Fixed  chart minimum : 1.17770
Scale in points per bar: 1.00
Chart minimum: 1.17770
Chart maximum: 1.22650
------
Text of a comment in a chart: ""
The name of the Expert Advisor running on the chart: "TestDoEasyPart67"
The name of the script running on the chart: ""
Symbol: "EURUSD"
============= End of the parameter list (Chart window EURUSD H4) =============

Autor: Artyom Trishkin

 
informacao muito importante!
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