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  • Coordinates
  • Non-solid figure
  • Drawing with opacity or anti-aliasing
  • Using the drawing functions
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Stored procedures
Draws a circle section or an ellipse section:
  • in an Image control,
  • in an Image variable.
Versions 16 and later
Android This function is now available for Android applications.
New in version 16
Android This function is now available for Android applications.
Android This function is now available for Android applications.
Versions 17 and later
iPhone/iPad This function is now available for iPhone/iPad applications.
New in version 17
iPhone/iPad This function is now available for iPhone/iPad applications.
iPhone/iPad This function is now available for iPhone/iPad applications.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
// Initialize the drawing in an Image control
dStartDrawing(IMG_Drawing)
 
// Draw a circle section whose
// background is light yellow and whose border is light blue
dSlice(10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
Versions 24 and later
iPhone/iPadUniversal Windows 10 App
// Draw a circle section whose
// background is light yellow and whose border is light blue
dSlice(IMG_Drawing, 10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
New in version 24
iPhone/iPadUniversal Windows 10 App
// Draw a circle section whose
// background is light yellow and whose border is light blue
dSlice(IMG_Drawing, 10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
iPhone/iPadUniversal Windows 10 App
// Draw a circle section whose
// background is light yellow and whose border is light blue
dSlice(IMG_Drawing, 10, 10, 50, 50, 20, 20, 40, 50, LightYellow, LightBlue)
Syntax
dSlice([<Image>, ] <X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Background color> [, <Line color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Versions 24 and later
AndroidiPhone/iPadUniversal Windows 10 App Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of an Image variable.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
New in version 24
AndroidiPhone/iPadUniversal Windows 10 App Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of an Image variable.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
AndroidiPhone/iPadUniversal Windows 10 App Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of an Image variable.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<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:
If this parameter is not specified, the background color:
  • is Transparent if dBackground was not used beforehand,
  • corresponds to the color specified during the last call to dBackground.
<Line color>: Integer or constant (optional)
Color of the line for the circle section. This color can correspond to:
If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to dPen,
  • is identical to the color used for the background if dPen 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).
The coordinates are given in relation to the top left corner of the image or Image control ((0, 0) coordinates).
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 dChord.
AndroidiPhone/iPad

Drawing with opacity or anti-aliasing

For a drawing with opacity (dStartDrawing with the dWithOpacity constant) or anti-aliasing (dChangeMode 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.

Using the drawing functions

The drawing functions can be used according to 2 methods:
  • Method 1: Using dStartDrawing
    • dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or variable) to which the drawing functions will be applied.
    • When drawing on an Image control:
      • The drawing functions operate on a copy ("bitmap") of the image. You can use the drawing functions of Windows (via API or CallDLL32) but these functions must use the DC (Device Context) returned by dStartDrawing.
      • dEndDrawing and dStartDrawing must not be called in the same process.
        The drawing will not be displayed if dEndDrawing and dStartDrawing are called in the same process: it will be automatically erased.
  • Versions 24 and later
    AndroidiPhone/iPadUniversal Windows 10 App Method 2: indicating the drawing target directly in the syntax (via a parameter)
    The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless. This function must be deleted.
    Versions 25 and later
    Android This syntax is now available.
    New in version 25
    Android This syntax is now available.
    Android This syntax is now available.
    New in version 24
    AndroidiPhone/iPadUniversal Windows 10 App Method 2: indicating the drawing target directly in the syntax (via a parameter)
    The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless. This function must be deleted.
    Versions 25 and later
    Android This syntax is now available.
    New in version 25
    Android This syntax is now available.
    Android This syntax is now available.
    AndroidiPhone/iPadUniversal Windows 10 App Method 2: indicating the drawing target directly in the syntax (via a parameter)
    The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless. This function must be deleted.
    Versions 25 and later
    Android This syntax is now available.
    New in version 25
    Android This syntax is now available.
    Android This syntax is now available.
Related Examples:
The drawing functions 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
Minimum version required
  • Version 9
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