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
{
		ScrollBar horizontal = getHorizontalBar( );
		if ( horizontal != null )
		{
			horizontal.setEnabled( false );
			horizontal.addSelectionListener( new SelectionAdapter( ) {
				public void widgetSelected( SelectionEvent event )
				{
					scrollHorizontally( (ScrollBar) event.widget );
				}
			} );
		}
		ScrollBar vertical = getVerticalBar( );
		if ( vertical != null )
		{
			vertical.setEnabled( false );
			vertical.addSelectionListener( new SelectionAdapter( ) {
				public void widgetSelected( SelectionEvent event )
				{
					scrollVertically( (ScrollBar) event.widget );
				}
			} );
		}
	}
	private void scrollHorizontally( ScrollBar scrollBar )
	{
		if ( sourceImage == null )
			return;
		AffineTransform af = transform;
		double tx = af.getTranslateX( );