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Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions
  • Coordinates
  • Non-solid figure
  • Drawing with opacity or anti-aliasing
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Stored procedures
Draws a circle or an ellipse section in an Image control.
Example
// Dessin d'une portion de cercle dont le
// fond est jaune clair et le bord bleu clair
IMG_Dessin.DessinePortion(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
Syntax

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

<Image control>.DrawSlice(<X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])
<Image control>: Control name
Name of the Image control 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 circle section. These coordinates are expressed in pixels.
<Y3>: Integer
Y-coordinate of the start point of the circle section. These coordinates are expressed in pixels.
<X4>: Integer
X-coordinate of the end point of the circle section. These coordinates are expressed in pixels.
<Y4>: Integer
Y-coordinate of the end point of the circle section. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of the 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:
  • is Transparent if the function <Image>.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>.Pen.
New in version 2024
Universal Windows 10 AppAndroidiPhone/iPadIOS WidgetMac Catalyst

Drawing a section of a circle using a Rectangle Variable Hide the details

<Image control>.DrawSlice(<Rectangle> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])
<Image control>: Control name
Name of the Image control to be used.
<Rectangle>: Rectangle variable
Name of the Variable type Rectangle Receiver in which the circle is inscribed..
<X3>: entier
X-coordinate of the start point of the circle section. These coordinates are expressed in pixels.
<Y3>: entier
Y-coordinate of the start point of the circle section. These coordinates are expressed in pixels.
<X4>: entier
X-coordinate of the end point of the circle section. These coordinates are expressed in pixels.
<Y4>: entier
Y-coordinate of the end point of the circle section. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of the 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:
  • is Transparent if the function <Image>.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>.Pen.
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 specified with respect to the upper-left corner of the Image control (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 <Image>.DrawChord.
AndroidiPhone/iPadIOS WidgetMac Catalyst

Drawing with opacity or anti-aliasing

For a drawing with opacity (<Image>.StartDrawing with the dWithOpacity constant) or anti-aliasing (<Image>.ChangeMode with the drawAntiAliasing constant), the outline is drawn inside 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: wd290pnt.dll
Minimum version required
  • Version 24
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Last update: 01/19/2024

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