<Image variable>.DrawArc (Function)

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Prefix syntax

Drawing functions on Image variables

DrawArc

Presentation

Example

Coordinates of the arc

Drawing a solid figure

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See also

<Image variable>.DrawArc (Function)

In french: <Variable Image>.DessineArc

Draws a circle arc or an ellipse arc in a variable of type Image.

The arc is drawn counterclockwise.

Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.

Example

MyImage is Image = "Test.gif"
// Draw a light yellow arc of circle in MyImage variable
MyImage.DrawArc(10, 10, 50, 50, 20, 20, 40, 50, LightYellow)

IMG_MyDrawing = MyImage

Syntax

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

<Image variable>: Image variable

Name of the Image variable to be used.

<X1>: Integer

X-coordinate (in pixels) of the upper-left corner of the rectangle containing the circle.

<Y1>: Integer

Y-coordinate (in pixels) of the upper-left corner of the rectangle containing the circle.

<X2>: Integer

X-coordinate (in pixels) of the lower-right corner of the rectangle containing the circle.

<Y2>: Integer

Y-coordinate (in pixels) of the lower-right corner of the rectangle containing the circle.

<X3>: Integer

X-coordinate (in pixels) of the starting point of the arc.

<Y3>: Integer

Y-coordinate (in pixels) of the starting point of the arc.

<X4>: Integer

X-coordinate (in pixels) of the end point of the arc.

<Y4>: Integer

Y-coordinate (in pixels) of the end point of the arc.

<Line color>: Integer or constant (optional)

Color of the arc of circle. 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 variable>.Pen has not been used beforehand,
corresponds to the color specified in the last call to <Image variable>.Pen.

<Line thickness>: Optional integer

Thickness (in pixels) of the arc of circle to draw. If this parameter is not specified, the value taken into account can be:
the last value specified in the last call to <Image variable>.Pen.
1 if <Image variable>.Pen was not used beforehand.

Remarks

Coordinates of the arc

If the start and end points 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).

The origin used to calculate the coordinates corresponds to the upper-left corner of the image (coordinates: (0,0)).

Drawing a solid figure

To draw a solid figure (a full arc), use <Image variable>.DrawChord or <Image variable>.DrawSlice.

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