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Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions
  • Using the drawing functions
  • Drawing in PHP
  • Drawing in Browser code
WINDEV
WindowsLinuxJavaReports and QueriesUser code (UMC)
WEBDEV
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WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac Catalyst
Others
Stored procedures
Declares the default background color for the rectangles, circles, etc::
  • in an Image control,
  • in a variable of type Image.
    WEBDEV - Browser codePHP This type of variable is not available.
  • WINDEVWEBDEV - Server code in a variable of type WDPic (on the background layer),
  • WINDEVWEBDEV - Server code in a variable of type picLayer.
Linux Caution: Using this function under Linux requires a specific configuration.. For more details, see The drawings.
// Initialise le dessin dans un champ Image
dStartDrawing(IMG_Dessin)

// Déclaration de la couleur de fond des différents dessins réalisés dans le champ Image
dBackground(LightGreen)
WINDEVWEBDEV - Server codeReports and QueriesiPhone/iPadIOS WidgetMac CatalystUser code (UMC)Ajax
// Déclaration de la couleur de fond des différents dessins réalisés dans le champ Image IMG_Dessin
dBackground(IMG_Dessin, LightGreen)
Syntax
dBackground([<Image>, ] <Color> [, <Fill style> [, <Type of hatching> [, <Opacity>]]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Reports and QueriesWindowsLinuxAndroidiPhone/iPadIOS WidgetMac CatalystJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • WINDEVWEBDEV - Server code the name of a variable of type WDPic. Only the background layer will be handled.
  • WINDEVWEBDEV - Server code the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Color>: Integer or constant
Default background color of different drawings. 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. In this case, the opacity specified in the variable is taken into account.
    WEBDEV - Browser codePHP Not available.
<Fill style>: Optional integer or Integer constant
Default background fill of different drawings:
BackgroundHatchedBackground filled with hatching.
Corresponds to value 2 for compatibility.
BackgroundSolid
(Default value)
Solid background.
Corresponds to value 0 for compatibility.
BackgroundTransparentTransparent background (<Color> is ignored).
Corresponds to value 1 for compatibility.

WEBDEV - Browser code This value is ignored. In this version, you cannot hatch the background of a drawing.
iPhone/iPadIOS WidgetMac Catalyst The drawing of hatching is not supported.
<Type of hatching>: Optional integer
Type of background hatching used by default in the different drawings. To use this parameter, the value of <Fill style> must be equal to 2. If the value of <Fill style> is different from 2, <Type of hatching> is ignored. The different types of hatching are:
  • 0: Horizontal hatching
  • 1: Vertical crosshatching
  • 2: 60% diagonal cut
  • 3: 120% diagonal hatching
  • 4 (default): Cross-hatching
  • 5: Diagonal cross-hatching
WEBDEV - Browser code This value is ignored. In this version, you cannot hatch the background of a drawing.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity set to 128 is used to blend 50% of the color with the existing color found in the control.
Remarks:
  • This opacity will be taken into account if the drawing was initialized with the dWithOpacity constant (dStartDrawing).
  • If parameter <Couleur> corresponds to a variable of type Color, this parameter must not be specified: the opacity specified in the variable will be taken into account.
Remarks

Using the drawing functions

The drawing functions can be used according to 2 methods:
  • Method 1: Using the dDrawingStartfunction
    • 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.
        If function dEndDrawing is called in the same process as function dStartDrawing, the drawing will not appear: it will be automatically deleted.
  • Reports and QueriesWindowsLinuxAndroidiPhone/iPadIOS WidgetMac CatalystJavaUser code (UMC) Method 2: Indicate the design destination 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.
PHP

Drawing in PHP

In PHP, the drawing functions are based on the graphic library GD. This library is commonly used by the PHP hosting providers 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.
WEBDEV - Browser code

Drawing in Browser code

Some drawing functions are available in Browser code. The drawing functions in Browser code are based on the HTML 5 standard. More specifically, these functions are based on the "canvas" tag of HTML 5.
The drawing features in browser code are available for the recent browsers only (supporting the HTML 5 standard). To find out whether the drawing features are proposed by your browser, use DrawingAvailable.
Attention: To use the drawing functions with Internet Explorer 9, the project must include the reference to the DTD file. To do so, the HTML mode must be "HTML 4.01 Transitional + DTD". This option is available in the "Advanced" tab of the project description window.
Reminder: To display the project description window, under the "Project" pane, in the "Project" group, click on "Description".
Special case: Drawing in the browser of an Android phone: Browser drawing functions are only available in Android version 3 and higher..
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: wd300pnt.dll
Minimum version required
  • Version 9
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Last update: 09/24/2024

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