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  • Using the drawing functions
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Stored procedures
Draws a point:
  • in an Image control,
  • Versions 17 and later
    WINDEVWindowsLinuxUser code (UMC) in an Image variable.
    New in version 17
    WINDEVWindowsLinuxUser code (UMC) in an Image variable.
    WINDEVWindowsLinuxUser code (UMC) in an Image variable.
    in an Image variable.
Versions 15 and later
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
New in version 15
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. See The drawings for more details.
Versions 24 and later
Java The syntax that uses the Point variables is now available for Java applications.
New in version 24
Java The syntax that uses the Point variables is now available for Java applications.
Java The syntax that uses the Point variables is now available for Java applications.
// Initialize the drawing in an Image control
dStartDrawing(IMG_Drawing)

// Draw a point in light yellow
dPoint(10, 50, LightYellow)
Versions 24 and later
WINDEVUser code (UMC)
// Draw a point in light yellow
dPoint(IMG_Drawing, 10, 50, LightYellow)
New in version 24
WINDEVUser code (UMC)
// Draw a point in light yellow
dPoint(IMG_Drawing, 10, 50, LightYellow)
WINDEVUser code (UMC)
// Draw a point in light yellow
dPoint(IMG_Drawing, 10, 50, LightYellow)
Syntax

Drawing a point by specifying its coordinates Hide the details

dPoint([<Image>, ] <X coordinate> , <Y coordinate> [, <Point color> [, <Opacity>]])
<Image>: Optional control name or optional Image variable
Versions 24 and later
WindowsLinuxUser code (UMC) 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
WindowsLinuxUser code (UMC) 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.
WindowsLinuxUser code (UMC) 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.
<X coordinate>: Integer
Horizontal position (in pixels) of the point to draw.
<Y coordinate>: Integer
Vertical position (in pixels) of the point to draw.
<Point color>: Integer or constant (optional)
Color that must be assigned to the point. This color corresponds to:
If this parameter is not specified, the color of the point:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity sets to 128 indicates that the relevant pixel will have a transparency of 50% when it is drawn on the screen or saved in an image in PNG format.
Note: This opacity will be taken into account if the drawing found in the image was initialized with the dWithOpacity constant (dStartDrawing).
Versions 21 and later
WINDEV

Drawing a point via a Point variable Hide the details

dPoint(<Point> [, <Point color> [, <Opacity>]])
<Point>: Point variable
Name of the Point variable containing the coordinates of the point to draw.
<Point color>: Integer or constant (optional)
Color that must be assigned to the point. This color corresponds to:
If this parameter is not specified, the color of the point:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity sets to 128 indicates that the relevant pixel will have a transparency of 50% when it is drawn on the screen or saved in an image in PNG format.
Note: This opacity will be taken into account if the drawing found in the image was initialized by the dWithOpacity constant (dStartDrawing).
New in version 21
WINDEV

Drawing a point via a Point variable Hide the details

dPoint(<Point> [, <Point color> [, <Opacity>]])
<Point>: Point variable
Name of the Point variable containing the coordinates of the point to draw.
<Point color>: Integer or constant (optional)
Color that must be assigned to the point. This color corresponds to:
If this parameter is not specified, the color of the point:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity sets to 128 indicates that the relevant pixel will have a transparency of 50% when it is drawn on the screen or saved in an image in PNG format.
Note: This opacity will be taken into account if the drawing found in the image was initialized by the dWithOpacity constant (dStartDrawing).
WINDEV

Drawing a point via a Point variable Hide the details

dPoint(<Point> [, <Point color> [, <Opacity>]])
<Point>: Point variable
Name of the Point variable containing the coordinates of the point to draw.
<Point color>: Integer or constant (optional)
Color that must be assigned to the point. This color corresponds to:
If this parameter is not specified, the color of the point:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity sets to 128 indicates that the relevant pixel will have a transparency of 50% when it is drawn on the screen or saved in an image in PNG format.
Note: This opacity will be taken into account if the drawing found in the image was initialized by the dWithOpacity constant (dStartDrawing).
WINDEVJava

Drawing a point via a Point variable Hide the details

dPoint([<Image>, ] <Point> [, <Point color> [, <Opacity>]])
<Image>: Optional control name or optional Image variable
Versions 24 and later
WindowsLinuxUser code (UMC) 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
WindowsLinuxUser code (UMC) 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.
WindowsLinuxUser code (UMC) 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.
<Point>: Point variable
Name of the Point variable containing the coordinates of the point to draw.
<Point color>: Integer or constant (optional)
Color that must be assigned to the point. This color corresponds to:
If this parameter is not specified, the color of the point:
  • is Transparent if dPen was not used beforehand,
  • corresponds to the color specified in the last call to dPen.
<Opacity>: Optional integer
Opacity of color, included between 0 (transparent) and 255 (opaque). An opacity sets to 128 indicates that the relevant pixel will have a transparency of 50% when it is drawn on the screen or saved in an image in PNG format.
Note: This opacity will be taken into account if the drawing found in the image was initialized by the dWithOpacity constant (dStartDrawing).
Remarks

Coordinates

The coordinates are specified in relation to the top left corner of the Image control (coordinates set to (0, 0)).

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
    WindowsLinuxUser 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. dStartDrawing becomes useless.
    New in version 24
    WindowsLinuxUser 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. dStartDrawing becomes useless.
    WindowsLinuxUser 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. dStartDrawing becomes useless.
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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