|
|
|
|
|
- Anti-aliasing
- Using the drawing functions
- Drawing in PHP
- Drawing in Browser code
dChangeMode (Function) In french: dChangeMode Changes the drawing mode used by the drawing functions ( dLine, dRectangle, ...). The change is applied to the element being drawn. This element can be: - an Image control,
- in a variable of type Image.
 This type of variable is not available. in a variable of type WDPic (on the background layer), in a variable of type picLayer.
Syntax
dChangeMode([<Image>, ] <New mode>)
<Image>: Optional control name or optional Image, WDPic or picLayer variable If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing. <New mode>: Integer constant Mode for drawing in the image:
| | drawAntiAliasing | Uses the GDI+ and/or the features of the video card to draw the lines and the circles without jagged effects. This drawing mode is slower but the results are better than with the standard mode.
| drawDefault | Standard colors. | drawXOR | Colors applied via an "exclusive or" operation with the background. Erases a drawing if this option is used twice. WARNING: This drawing mode is not compatible with opacity management (the drawing no longer fades).. Caution: - The drawing in XOR mode is available for the Image controls only. The drawing in XOR mode is not available for the Image variables.
- The drawXOR constant cannot be combined with the drawAntiAliasing constant.
|
Remarks Using the drawing functions The drawing functions can be used according to 2 methods: - Method 1: Using the dDrawingStartfunction
- dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or variable) to which the drawing functions will be applied.
- When drawing on an Image control:
- The drawing functions operate on a copy ("bitmap") of the image. You can use the drawing functions of Windows (via API or CallDLL32) but these functions must use the DC (Device Context) returned by dStartDrawing.
- dEndDrawing and dStartDrawing must not be called in the same process.
If function dEndDrawing is called in the same process as function dStartDrawing, the drawing will not appear: it will be automatically deleted.
 Method 2: Indicate the design destination directly in the syntax (via a parameter) The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless. This function must be deleted.
Related Examples:
|
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
|
Business / UI classification: Neutral code
This page is also available for…
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|