<Image variable>.DrawSlice (Function)

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

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<Image variable>.DrawSlice (Function)

In french: <Variable Image>.DessinePortion

Draws a section of a circle or an ellipse in an Image variable.

Versions 25 and later

This function is now available for Java applications.

New in version 25

This function is now available for Java applications.

Versions 15 and later

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

New in version 15

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

This function is now available for WEBDEV sites in Linux.

Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.

Versions 18 and later

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Example

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

Syntax

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

<Image variable>: Image variable

Name of Image 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:
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 variable>.Background was not used beforehand,
corresponds to the color specified during the last call to <Image 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 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 in the last call to <Image variable>.Pen,
is identical to the color used for the background if <Image variable>.Pen was not 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 <Image variable>.DrawChord.

Drawing with opacity or anti-aliasing

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

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