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  • Drawing in anti-aliasing mode
  • Using the drawing functions
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Stored procedures
Colors an area:
  • in an Image control,
  • in a variable of type Image.
This coloring is applied to all the juxtaposed points that have the same color as the specified start point.
// Initialize the drawing in an Image control
dStartDrawing(IMG_Drawing)
 
// Color an area in light blue
dFill(10, 50, LightBlue)
Reports and Queries
// Color an area in light blue
dFill(IMG_Drawing, 10, 50, LightBlue)
Syntax
dFill([<Image>, ] <X> , <Y> [, <Fill color> [, <Border color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Reports and QueriesWindows Image to use. The image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<X>: Integer
X-coordinate (in pixels) of the point inside the area to color. This position is given in relation to the upper-left corner of the image control (coordinates set to (0,0)).
<Y>: Integer
Y-coordinate (in pixels) of the point inside the area to color. This position is given in relation to the upper-left corner of the image control (coordinates set to (0,0)).
<Fill color>: Integer or constant (optional)
Color used to fill the area. This color can correspond to:
If this parameter is not specified, the fill color:
  • is Transparent if dBackground has not been used beforehand,
  • corresponds to the color specified in the last call to dBackground.
<Border color>: Integer or constant (optional)
Area border color. This color can correspond to:
If this parameter is not specified, the area border color adapts to the fill color.
Remarks

Drawing in anti-aliasing mode

When drawing in anti-aliasing mode (drawAntiAliasing constant in dChangeMode), the graphics card smooths out the points and colors used in the border of shapes.
In this case, <Border color> is not displayed in the drawing and the fill is applied to the entire drawing.

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 QueriesWindows 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: wd280pnt.dll
Minimum version required
  • Version 9
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