<WDPic variable>.DrawSlice (Function)

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

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<WDPic variable>.DrawSlice (Function)

In french: <Variable WDPic>.DessinePortion

Draws a section of a circle or an ellipse in a variable of type WDPic (on the background layer).

Example

MyWDPicImage is WDPic = "Test.gif"
// Draw a circle section whose
// background is light yellow and whose border is light blue
MyWDPicImage.DrawSlice(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
IMG_MyDrawing = MyWDPicImage

Syntax

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

<WDPic image>: WDPic variable

Name of the WDPic variable to be used. Only the background layer will be handled.

<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:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the background color:
is Transparent if <WDPic variable>.Background has not been used beforehand,
corresponds to the color specified in the last call to <WDPic variable>.Background.

<Line color>: Integer or constant (optional)

Color of the line for the circle section. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to <WDPic variable>.Pen,
is the same as the background color if <WDPic variable>.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 specified with respect to the upper-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 <WDPic variable>.DrawChord.

Drawing with opacity or anti-aliasing

For a drawing with opacity (<WDPic variable>.StartDrawing with the dWithOpacity constant) or anti-aliasing (<WDPic variable>.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:

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: wd280pnt.dll