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Stored procedures
Draws the chord of a circle (intersection between an ellipse and a straight line) in an Image variable.
Versions 15 and later
WEBDEV - Server codeLinux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
New in version 15
WEBDEV - Server codeLinux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
WEBDEV - Server codeLinux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
Example
MyImage is Image = "Test.gif"
// In an Image variable, 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 can correspond to:
If this parameter is not specified, the background color:
<Line color>: Integer or constant (optional)
Line color for the circle chord. This color can correspond to:
If this parameter is not specified, the line color:
Remarks

Limits

  • <Image variable>.DrawChord is not available in Anti-aliasing mode (for more details, see the help on <Image variable>.ChangeMode).
  • <Image variable>.DrawChord is not available for a drawing with management of alpha channel (see the help about <Image variable>.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 with respect to the top left corner of the Image control (coordinates set to (0,0)).

Solid figure

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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 : wd250pnt.dll
Minimum version required
  • Version 24
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