<Image>.DrawSlice (Function)

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<Image>.DrawSlice (Function)

In french: <Image>.DessinePortion

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

Caution: In Linux, this function requires a specific configuration. For more details, see Drawing in WINDEV, WEBDEV and WINDEV Mobile.

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

Drawing a sector 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:
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 <Image variable>.Background has not been used beforehand,
corresponds to the color specified in 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 WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the line color:
is Transparent if <Image>.Pen has not been previously used.
For a variable of type Image, the line will be black.
corresponds to the color specified in the last call to <Image>.Pen.

Drawing a sector 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 Rectangle variable that corresponds to the rectangle containing the circle.

<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 <Image variable>.Background has not been used beforehand,
corresponds to the color specified in 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 WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the line color:
is Transparent if <Image>.Pen has not been previously used.
For a variable of type Image, the line will be black.
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 counterclockwise.

Non-solid figure

To draw a non-solid figure (without taking into account the center of the circle), use <Image>.DrawChord.

Drawing with opacity or anti-aliasing

In the case of drawing with opacity (function <Image>.StartDrawing with constant dWithOpacity) or anti-aliasing (function <Image>.ChangeMode with constant drawingAntiAliasing), the outline is drawn over the inside of the portion: the line is therefore partly combined with the inside of the portion. 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: wd300pnt.dll