Bug 144590 [Accessibility] BIRT custom controls should support active accessibility
Description: BIRT custom controls should support active accessibility. There are some custom controls in BIRT GUI. In Eclipse, when implementing a custom control you should also implement some or all of (as they apply to your control) org.eclipse.swt.accessibility.AccessibleListener, org.eclipse.swt.accessibility.AccessibleControlListener and org.eclipse.swt.accessibility.AccessibleTextListener. Also, the custom control can notify Active Accessibility of changes within the control using org.eclipse.swt.accessibility.Accessible methods such as setFocus(), selectionChanged(), textCaretMoved(), textChanged() and textSelectionChanged().
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/graphics/ImageCanvas.java
}
			horizontal.setSelection( (int) ( -tx ) );
			horizontal.setThumb( (int) ( getClientArea( ).width ) );
		}
		ScrollBar vertical = getVerticalBar( );
		if ( vertical != null )
		{
			vertical.setIncrement( (int) ( getClientArea( ).height / 100 ) );
			vertical.setPageIncrement( (int) ( getClientArea( ).height ) );
			if ( imageBound.height * sy > ch )
			{
				vertical.setMaximum( (int) ( imageBound.height * sy ) );
				vertical.setEnabled( true );
				if ( ( (int) -ty ) > vertical.getMaximum( ) - ch )
					ty = -vertical.getMaximum( ) + ch;
			}
			else
			{
				vertical.setEnabled( false );
				ty = ( ch - imageBound.height * sy ) / 2;
			}
			vertical.setSelection( (int) ( -ty ) );
			vertical.setThumb( (int) ( getClientArea( ).height ) );
		}
		af = AffineTransform.getScaleInstance( sx, sy );
		af.preConcatenate( AffineTransform.getTranslateInstance( tx, ty ) );
		transform = af;
		redraw( );
	}
	/**