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  • Drawing a polygon in an Image control
dPolygon (Example)
Drawing a polygon in an Image control
The following code is used to draw a 4-side polygon in an Image control (IMG_ImageDrawing). The coordinates of the polygon segments are entered by the user in edit controls (X1, Y1, X2, Y2, X3, Y3, X4, Y4). The background color and the side color are selected by the user via two radio buttons (RADIO_SelectBackground and RADIO_SelectLine).
// Declare the variables
BackgroundColor is int
LineColor is int
 
// Declare the drawing in the "IMG_ImageDrawing" control
dStartDrawing(IMG_ImageDrawing)
 
// Retrieve the selected background color
SWITCH RADIO_SelectBackground
CASE 1: BackgroundColor = LightRed
CASE 2: BackgroundColor = LightBlue
CASE 3: BackgroundColor = LightGreen
CASE 4: BackgroundColor = LightYellow
END
 
// Retrieve the selected line color
SWITCH RADIO_SelectLine
CASE 1: LineColor = LightRed
CASE 2: LineColor = LightBlue
CASE 3: LineColor = LightGreen
CASE 4: LineColor = LightYellow
END
 
// Draw the polygon
dPolygon(4, X1, Y1, X2, Y2, X3, Y3, X4, Y4, BackgroundColor, LineColor)
Minimum version required
  • Version 9
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