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  • Coordinates of the arc
  • Drawing a solid figure
  • Using the drawing functions
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Stored procedures
Draws an arc of circle or an arc of ellipse:
  • in an Image control,
  • in an Image variable.
The arc is drawn anticlockwise.
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.
Versions 24 and later
Android The syntax that manages the Color type is now available for Android applications.
New in version 24
Android The syntax that manages the Color type is now available for Android applications.
Android The syntax that manages the Color type is now available for Android applications.
// Initialize the drawing in the Image control IMG_MyDrawing
dStartDrawing(IMG_MyDrawing)
 
// Draw an arc of circle in light yellow
dArc(10, 10, 50, 50, 20, 20, 40, 50, LightYellow)
Versions 24 and later
iPhone/iPadUniversal Windows 10 App
// Draw an arc of circle in light yellow
dArc(IMG_MyDrawing,10, 10, 50, 50, 20, 20, 40, 50, LightYellow)
New in version 24
iPhone/iPadUniversal Windows 10 App
// Draw an arc of circle in light yellow
dArc(IMG_MyDrawing,10, 10, 50, 50, 20, 20, 40, 50, LightYellow)
iPhone/iPadUniversal Windows 10 App
// Draw an arc of circle in light yellow
dArc(IMG_MyDrawing,10, 10, 50, 50, 20, 20, 40, 50, LightYellow)
Syntax

Drawing an arc Hide the details

dArc([<Image>, ] <X1> , <Y1> , <X2> , <Y2> , <X3> , <Y3> , <X4> , <Y4> [, <Line color> [, <Line thickness>]])
<Image>: Optional control name or optional Image variable
Versions 24 and later
iPhone/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
iPhone/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.
iPhone/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 (in pixels) of top left corner of the rectangle containing the circle.
<Y1>: Integer
Y coordinate (in pixels) of top left corner of the rectangle containing the circle.
<X2>: Integer
X coordinate (in pixels) of bottom right corner of the rectangle containing the circle.
<Y2>: Integer
Y coordinate (in pixels) of bottom right corner of the rectangle containing the circle.
<X3>: Integer
X coordinate (in pixels) of start point of the arc of circle.
<Y3>: Integer
Y coordinate (in pixels) of start point of the arc of circle.
<X4>: Integer
X coordinate (in pixels) of end point of the arc of circle.
<Y4>: Integer
Y coordinate (in pixels) of end point of the arc of circle.
<Line color>: Integer or constant (optional)
Color of the arc of circle. This color corresponds to:If this parameter is not specified, the line color:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Line thickness>: Optional integer
Versions 22 and later
iPhone/iPadUniversal Windows 10 App Thickness (in pixels) of the arc of circle to draw. If this parameter is not specified, the value taken into account is:
  • the last value specified during the last call to dPen.
  • 1 if dPen was not used beforehand.
New in version 22
iPhone/iPadUniversal Windows 10 App Thickness (in pixels) of the arc of circle to draw. If this parameter is not specified, the value taken into account is:
  • the last value specified during the last call to dPen.
  • 1 if dPen was not used beforehand.
iPhone/iPadUniversal Windows 10 App Thickness (in pixels) of the arc of circle to draw. If this parameter is not specified, the value taken into account is:
  • the last value specified during the last call to dPen.
  • 1 if dPen was not used beforehand.
Remarks

Coordinates of the arc

If the start and end points are not located on the circle border (or on the ellipse border), the point taken into account corresponds to the intersection between the circle and the line that joins the specified point and the center of rectangle (which means the center of the circle).
The origin used to calculate the coordinates corresponds to the top left corner of Image control ((0,0) coordinates).

Drawing a solid figure

To draw a solid figure (a full arc), use dChord or dSlice.

Using the drawing functions

The drawing functions can be used according to 2 methods:
  • Method 1: Using dDrawing
    • dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or Image variable) onto 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
    iPhone/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.
    New in version 24
    iPhone/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.
    iPhone/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.
Limitation for dArc: The opacity defined by dBackground is ignored.
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
Component : wd240pnt.dll
Minimum version required
  • Version 9
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