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- Special cases
- Characteristics of drawings in the browser
- Drawing in Browser code
- Drawing with management of opacity
- dStartDrawing, zoom and automatic scrollbars
- Pattern and PHP
dStartDrawing (Function) In french: dDébutDessin
// Start drawing in the "IMG_ImageDrawing" control ResDrawing = dStartDrawing(IMG_ImageDrawing) // Drawings performed in the "IMG_ImageDrawing" control ... // End of drawing in the "IMG_ImageDrawing" control
dStartDrawing(IMG_Image1) dFont("Arial", 12, iNormal, 0) dText(4, 0, "I am writing my text in an Image control!")
Syntax
Starting a drawing in an Image control Hide the details
<Result> = dStartDrawing(<Image control> [, <Options>])
<Result>: System integer - Memory DC (device context) of the Image control,
- 0 if an error occurred. This parameter can be used to call system routines (functions of Windows API). In this case, we recommend that you use a system integer.
<Image control>: Control name Name of Image control where the drawing will be performed. <Options>: Optional Integer constant (or combination of constants) Drawing options: | | Versions 22 and laterdDisplayAsynchronous New in version 22dDisplayAsynchronous dDisplayAsynchronous | | Versions 16 and laterdDisplayManual New in version 16dDisplayManual dDisplayManual | | dWithOpacity | Allows the opacity to be managed in the different drawing functions used by the Image control. Used for example to create a drawing saved in PNG format with management of alpha layer.
| dErase (Default value) | Erases the drawing found in the Image control. | dGridlinesOpacity | The drawing is displayed over gridlines in order to highlight the transparent or semi-transparent sections of drawing. The gridlines are not saved in the image.
| dNoErase | Does not erase the drawing found in the Image control. | dOnChart | Used to draw in an Image control in which a chart was already drawn. In this case, the chart drawing is not erased.
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Versions 17 and later New in version 17
Related Examples:
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Unit examples (WINDEV): The drawing functions
[ + ] Using the main drawing functions of WINDEV to: - Initialize an Image control for drawing - Draw simple shapes - Write a text into a drawing - Change the color in a drawing
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