Examples of org.eclipse.swt.graphics.Region.intersect()

org.eclipse.swt.graphics.Region.intersect()
Intersects the given rectangle to the collection of polygons the receiver maintains to describe its area. @param rect the rectangle to intersect with the receiver @exception IllegalArgumentException
- ERROR_NULL_ARGUMENT - if the argument is null
- ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative
@exception SWTException
- ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
@since 3.0

  void drawBackground(GC gc, int[] shape, int x, int y, int width, int height, Color defaultBackground, Image image, Color[] colors, int[] percents, boolean vertical) {
    Region clipping = new Region();
    gc.getClipping(clipping);
    Region region = new Region();
    region.add(shape);
    region.intersect(clipping);
    gc.setClipping(region);
    
    if (image != null) {
      // draw the background image in shape
      gc.setBackground(defaultBackground);

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