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Stored procedures
Performs a rotation:
  • in an Image control,
  • in a variable of type Image.
Example
// Rotate the IMG_Image1 control by 45 degrees
Result1 is boolean
Result1 = dRotation(IMG_Image1, 45)
IF Result1 = False THEN Error("The operation failed")
Syntax

Performing a simple rotation Hide the details

<Result> = dRotation(<Image> , <Rotation angle> [, <Options>])
<Result>: Boolean
  • True if the rotation was performed,
  • False otherwise.
<Image>: Control name, Image variable or picLayer variable
Image to use. The image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
The rotation is performed in relation to the center of the image. The image is directly modified.
<Rotation angle>: Real
Rotation angle (in degrees).
  • If the angle is positive, the image rotates clockwise.
  • If the angle is negative, the image rotates counterclockwise.
<Options>: Integer constant
Reports and QueriesWindows Rotation options:
drAdaptThe image is flipped and enlarged. Then, its size is reduced to correspond to the initial image size.
drDefaultEnlarge the image (if necessary) so that it corresponds to the dimensions of rotated image.
Constant used by default for Image or picLayer variables.
drNoEnlargingThe image is flipped but not enlarged: the image may be truncated.
Constant used by default for the Image controls.

Reports and QueriesWindows

Performing a rotation while modifying the center of rotation Hide the details

<Result> = dRotation(<Image control> , <Rotation angle> , <X of rotation center> , <Y of rotation center> [, <Options>])
<Result>: Boolean
  • True if the rotation was performed,
  • False otherwise.
<Image control>: Control name
Name of the Image control to be used. The rotation is performed in relation to the center of the Image control. The image found in the Image control is modified.
<Rotation angle>: Real
Rotation angle (in degrees).
<X of rotation center>: Integer
X-coordinate (in pixels) of the new rotation center.
<Y of rotation center>: Integer
Y-coordinate (in pixels) of the new rotation center.
<Options>: Integer constant
Rotation options:
drDefaultEnlarge the image (if necessary) so that it corresponds to the dimensions of rotated image.
Constant used by default for Image or picLayer variables.
drNoEnlargingThe image is flipped but not enlarged
Constant used by default for the Image controls.

Remarks

End of drawing

If dEndDrawing and dRotation are called in the same process, the image changes will not be displayed.
Related Examples:
Image rotation Unit examples (WINDEV): Image rotation
[ + ] Image rotation from any point that will be used as rotation center.
Business / UI classification: Neutral code
Component: wd280pnt.dll
See also
Minimum version required
  • Version 9
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