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 WINDEV, WEBDEV AND WINDEV MOBILE
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  • Using the drawing functions
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Stored procedures
Draws RTF text:
  • in an Image control,
  • in a variable of type Image.
  • WINDEVWEBDEV - Server code in a variable of type WDPic (on the background layer),
  • WINDEVWEBDEV - Server code in a variable of type picLayer.
Example
// Initialize the drawing in an Image control
dStartDrawing(IMG_Drawing)
 
// Draw RTF text
dTextRTF(10, 20, MyRTFText)
// Draw RTF text
dTextRTF(IMG_Drawing, 10, 20, MyRTFText)
Syntax
dTextRTF([<Image>, ] <X-coordinate> , <Y-coordinate> , <RTF text> [, <Width> [, <Height>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Reports and QueriesWindowsUser code (UMC) Image to use. The image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • WINDEVWEBDEV - Server code the name of a variable of type WDPic. Only the background layer will be handled.
  • WINDEVWEBDEV - Server code the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<X-coordinate>: Integer
X-coordinate of the RTF text to draw (in pixels).
<Y-coordinate>: Integer
Y-coordinate of the RTF text to draw (in pixels).
<RTF text>: Character string
RTF text to draw.
<Width>: Optional integer
Maximum width of the text. No maximum width is defined by default.
<Height>: Optional integer
Maximum height of the text. No maximum height is defined by default.
Remarks

Coordinates

Coordinates are specified with respect to the upper-left corner of the image or Image control (coordinates: (0,0)).
The coordinates correspond to the upper-left corner of the rectangle into which the text will be drawn.

Using the drawing functions

The drawing functions can be used according to 2 methods:
  • Method 1: Using dStartDrawing
    • 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.
        The drawing will not be displayed if dEndDrawing and dStartDrawing are called in the same process: it will be automatically erased.
  • Reports and QueriesWindowsUser code (UMC) Method 2: indicating the drawing target 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:
The drawing functions 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
Component: wd270pnt.dll
See also
Minimum version required
  • Version 20
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