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- Coordinates
- Using the drawing functions
- Drawing in PHP
- Drawing in Browser code
dRectangle (Function) In french: dRectangle Draws a rectangle: - in 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.
Note: To draw custom rectangles, use the dBorder function.. // Initialize the drawing in an Image control dStartDrawing(IMG_Drawing) // Draw a rectangle with a light yellow background // and light blue borders dRectangle(10, 10, 50, 50, LightYellow, LightBlue) Syntax
Drawing a rectangle by specifying the coordinates of rectangle Hide the details
dRectangle([<Image>, ] <X1> , <Y1> , <X2> , <Y2> [, <Background> [, <Line>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
<X1>: Integer X-coordinate (in pixels) of the upper-left corner of the rectangle. <Y1>: Integer Y-coordinate (in pixels) of the upper-left corner of the rectangle. <X2>: Integer X-coordinate (in pixels) of the lower-right corner of the rectangle. <Y2>: Integer Y-coordinate (in pixels) of the lower-right corner of the rectangle. <Background>: Integer, constant or Background variable (optional) - Background color of rectangle. This color can be:
- Background characteristics:
variable of type Background. In this case, the gradient defined in the variable is ignored.
- characteristics specified in the last call to dBackground if this parameter is not specified.
<Line>: Integer, constant or Border variable (optional) - Color of rectangle line. This color can be:
- an RGB color (returned by RGB),
- an HSL color (returned by HSL),
- a WLanguage preset color,
a variable of type Color, - identical to the color used for the background if this parameter is not specified and if dPen has not been used.
- Characteristics of the line:
variable of type Border. In this case, only the following properties are taken into account: - Color: if the property corresponds to the constant ColorDefined, the color defined during the last call to the dPen function is used.. If this function has not been used, the background color of the rectangle will be used.
- Thickness: if the property corresponds to the constant DefinedThickness, the thickness defined during the last call to function dPen is used.. If this function has not been used, the thickness will be set to 1.
- Trait: if the property corresponds to TraitIndéfini, the trait type defined during the last call to the dPen function is used.. If this function has not been used, the line will be solid.
- characteristics specified in the last call to dPen if this parameter is not specified.
Remarks Coordinates Coordinates are specified with respect to the upper-left corner of the image or Image control (coordinates: (0,0)). 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:
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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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Business / UI classification: Neutral code
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