<Image>.DrawSlice (Function)

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Coordinates
Non-solid figure
Drawing with opacity or anti-aliasing

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See also

<Image>.DrawSlice (Function)

In french: <Image>.DessinePortion

Draws a circle or an ellipse section in an Image control.

Example

// Draw a circle section whose
// background is light yellow and whose border is light blue
IMG_Drawing.DrawSlice(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)

Syntax

<Image control>.DrawSlice(<X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])

<Image control>: Control name

Name of Image control 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 corresponds to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a preset color of WLanguage,
Versions 22 and later
a Color variable.
New in version 22
a Color variable.
a Color variable.
If this parameter is not specified, the background color:
is Transparent if <Image>.Background was not used beforehand,
corresponds to the color specified in the last call to <Image>.Background.

<Line color>: Integer or constant (optional)

Color of the line for the circle section. This color corresponds to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a preset color of WLanguage,
Versions 22 and later
a Color variable.
New in version 22
a Color variable.
a Color variable.
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

Coordinates

If the start point and the end point are not located on the circle border (or on the ellipse border), 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).

The coordinates are specified in relation to the top left corner of the Image control (coordinates set to (0,0)).

The drawing sections are drawn anticlockwise.

Non-solid figure

To draw a non-solid figure, use <Image>.DrawChord.

Drawing with opacity or anti-aliasing

For a drawing with opacity (<Image>.StartDrawing with the constant dWithOpacity) or anti-aliasing (<Image>.ChangeMode with the constantdrawAntiAliasing), the border is drawn on top of 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:

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