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  • Coordinates
  • Non-solid figure
  • Drawing with opacity or anti-aliasing
  • Using the drawing functions
  • Pattern and PHP
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Stored procedures
Draws a circle section or an ellipse section:
  • in an Image control,
  • in an Image variable.
    PHP This type of variable is not available.
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
Universal Windows 10 AppiPhone/iPadUser code (UMC)Ajax
// 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
Universal Windows 10 AppiPhone/iPadUser code (UMC)Ajax
// 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)
Universal Windows 10 AppiPhone/iPadUser code (UMC)Ajax
// 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
Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • on behalf of an Variable of type Image.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
New in version 24
Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • on behalf of an Variable of type Image.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • on behalf of an Variable of type Image.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<X1>: entier
X coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y1>: entier
Y coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X2>: entier
X coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<Y2>: entier
Y coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.
<X3>: entier
X coordinate of start point of the circle section. These coordinates are expressed in pixels.
<Y3>: entier
Y coordinate of start point of the circle section. These coordinates are expressed in pixels.
<X4>: entier
X coordinate of end point of the circle section. These coordinates are expressed in pixels.
<Y4>: entier
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 function dBackground has not been used before,
  • corresponds to the Color specified in the last call to function 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 the dPen function has not been 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/iPadJavaUser code (UMC)PHPAjax

Drawing with opacity or anti-aliasing

In the case of a drawing with opacity (function dStartDrawing with the constant dWithOpacity) or anti-aliasing (function dChangeMode with the constant drawAntiAliasing), the contour is drawn by-Above inside the portion: 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
    Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    AndroidJava This syntax is now available.
    New in version 25
    AndroidJava This syntax is now available.
    AndroidJava This syntax is now available.
    New in version 24
    Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    AndroidJava This syntax is now available.
    New in version 25
    AndroidJava This syntax is now available.
    AndroidJava This syntax is now available.
    Universal Windows 10 AppAndroidiPhone/iPadJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    AndroidJava This syntax is now available.
    New in version 25
    AndroidJava This syntax is now available.
    AndroidJava This syntax is now available.
PHP

Pattern and PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting companies and therefore it is always enabled. The version of the GD library must be version 2.0.28 (or later). This library can be downloaded from the PHP site.
To enable (if necessary) this library locally, the following elements are required:
  • PHP installed.
  • the PHP.INI file found in the Windows directory must contain the following line: "extension=php_gd2.dll" (instead of ";extension=php_gd2.dll").
  • the php_gd2.dll file must exist in the directory of PHP extensions. This directory is defined in the PHP.INI file by the "extension_dir" variable.
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: wd260pnt.dll
Minimum version required
  • Version 9
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