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Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions
  • 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 a variable of type Image.
Example
MonImage is Image = "Test.gif"
// Dessin dans une variable Image d'une corde de cercle dont le
// fond est jaune clair et le bord bleu clair
MonImage.DessineCorde(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)

IMG_MonDessin = MonImage
Syntax

Draw a rope, specifying all the coordinates of the rectangle containing the rope. Hide the details

<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 be used.
<X1>: Integer
X-coordinate of the upper-left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y1>: Integer
Y-coordinate of the upper-left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X2>: Integer
X-coordinate of the lower-right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y2>: Integer
Y-coordinate of the lower-right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X3>: Integer
X-coordinate of the start point of the chord. These coordinates are expressed in pixels.
<Y3>: Integer
Y-coordinate of the start point of the chord. These coordinates are expressed in pixels.
<X4>: Integer
X-coordinate of the end point of the chord. These coordinates are expressed in pixels.
<Y4>: Integer
Y-coordinate of the end point of the chord. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of the 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:
  • is Transparent if the function <Image variable>.Pen has not been used before.
    New in version 2024
    In the case of an Variable type Image, the row will have the black Color..
  • corresponds to the color specified in the last call to <Image variable>.Pen.
Remarks

Limits

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

Solid figure

<Image variable>.DrawChord can only be used to draw a chord: outline only or chord area. To draw a solid figure (portion defined by the center of the circle and the two points on the circle), use <Image variable>.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
Business / UI classification: Neutral code
Component: wd290pnt.dll
Minimum version required
  • Version 24
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Last update: 01/19/2024

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