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New WINDEV and WEBDEV 25 feature!
  • Coordinates
  • Non-solid figure
  • Drawing with opacity or anti-aliasing
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Stored procedures
Draws a section of a circle or an ellipse in a picLayer variable.
Example
MyWDPicImage is WDPic = "Test.gif"
MyLayer is picLayer
 
// Draw a circle section whose
// background is light yellow and whose border is light blue
MyLayer.DrawSlice(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
IMG_MyDrawing = MyWDPicImage
Syntax
<picLayer image>.DrawSlice(<X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])
<picLayer image>: picLayer variable
Name of the picLayer 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 circle section. These coordinates are expressed in pixels.
<Y3>: Integer
Y coordinate of start point of the circle section. These coordinates are expressed in pixels.
<X4>: Integer
X coordinate of end point of the circle section. These coordinates are expressed in pixels.
<Y4>: Integer
Y coordinate of end point of the circle section. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of circle section. This color can correspond to:
If this parameter is not specified, the background color:
<Line color>: Integer or constant (optional)
Color of the line for the circle section. This color can correspond to:
If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to <Image>.Pen,
  • is identical to the color used for the background if <Image>.Pen has not been used.
Remarks

Coordinates

If the start point and the end point are not located on the border of the circle (or on the border of the ellipse), the point taken into account corresponds to 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).
Coordinates are given with respect to the top left corner of the image (coordinates: (0.0)).
The drawing sections are drawn anticlockwise.

Non-solid figure

To draw a non-solid figure (without taking into account the center of the circle), use <picLayer variable>.DrawChord.
Reports and QueriesWindows

Drawing with opacity or anti-aliasing

In the case of a drawing with opacity (<picLayer variable>.StartDrawing with the dWithOpacity constant) or anti-aliasing (<picLayer variable>.ChangeMode with the drawAntiAliasing constant), the outline is drawn over the inside of the section: therefore, the line is partly combined with the inside of the section. If the line is very thick, it will be displayed in two colors.
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 25
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