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Help / WLanguage / WLanguage functions / Controls, pages and windows / Drawing functions
  • Using the drawing functions
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Stored procedures
Declares the font that will be used by dText:
  • in an Image control,
  • in a variable of type Image.
// Initialise le dessin dans un champ Image
dStartDrawing(IMG_Dessin)

// Déclaration de la police de caractères:
// Arial, taille 12, gras
dFont("Arial", 12, iBold)
AndroidiPhone/iPadIOS WidgetMac Catalyst
// Déclaration de la police de caractères:
// Arial, taille 12, gras
dFont(IMG_Dessin, "Arial", 12, iBold)
Syntax

Using a specific font for the drawings Hide the details

dFont([<Image>, ] <Font> [, <Font size> [, <Font attributes> [, <Text inclination>]]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
AndroidiPhone/iPadIOS WidgetMac Catalyst Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Font>: Character string
Name of the font used when the text is drawn by dText. This parameter must not correspond to a font family. The list of fonts installed on the current computer is returned by FontList.
<Font size>: Optional integer
Size of the font (in pixels). The default value is 12.
<Font attributes>: Optional constant (or combination of constants)
Font attributes to use:
iBoldAssigns the bold attribute to the text drawn.
iItalicAssigns the italic attribute to the text drawn.
iNormal
(Default value)
Normalizes the text drawn
iStrikeOutStrikes the text drawn.
iUnderlinedUnderlines the text drawn.
<Text inclination>: Optional integer
Specifies the inclination of the text (in degrees). The default value is 0.
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.
  • AndroidiPhone/iPadIOS WidgetMac Catalyst 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.
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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