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New WINDEV, WEBDEV, WINDEV Mobile 24 feature!
  • Limits
  • Coordinates
  • Solid figure
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Stored procedures
Draws the chord of a circle (intersection between an ellipse and a straight line) in an Image variable.
Example
MyImage is Image = "Test.gif"
// Draw the chord of a circle whose
// background is light yellow and whose border is light blue
MyImage.DrawChord(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
 
IMG_MyDrawing = MyImage
 
Syntax
<Image variable>.DrawChord(<X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])
<Image variable>: Image variable
Name of the Image variable to use.
<X1>: Integer
X coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y1>: Integer
Y coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X2>: Integer
X coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y2>: Integer
Y coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X3>: Integer
X coordinate of start point of the chord. These coordinates are expressed in pixels.
<Y3>: Integer
Y coordinate of start point of the chord. These coordinates are expressed in pixels.
<X4>: Integer
X coordinate of end point of the chord. These coordinates are expressed in pixels.
<Y4>: Integer
Y coordinate of end point of the chord. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of chord. This color corresponds to:
If this parameter is not specified, the background color:
<Line color>: Integer or constant (optional)
Line color for the circle chord. This color corresponds to:
If this parameter is not specified, the line color:
  • corresponds to the color specified during the last call to <Image>.Pen,
  • is identical to the color used for the background if <Image>.Pen was not used.
Remarks

Limits

  • <Image variable>.DrawChord is not available in Anti-aliasing mode (see the help about <Image>.ChangeMode for more details).
  • <Image variable>.DrawChord is not available for a drawing with management of alpha channel (see the help about <Image>.StartDrawing for more details). This function has no effect.

Coordinates

If the start and end points are not located on the outline of the circle (or on the outline of the ellipse), the point taken into account is the intersection between the circle and the line that joins the specified point and the center of the rectangle (which means the center of the circle).
The coordinates are specified in relation to the top left corner of the Image control (coordinates set to (0, 0)).

Solid figure

To draw a solid shape, use <Image>.DrawSlice.
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
Component : wd240pnt.dll
Minimum required version
  • Version 24
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