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/dialogs/PreviewLabel.java
text = ""; 
		}
		Point pt = gc.stringExtent( text );
		gc.drawString( text,
				( getSize( ).x - pt.x ) / 2,
				( getSize( ).y - pt.y ) / 2,
				true );
		if ( isUnderline )
		{
			gc.drawLine( ( getSize( ).x - pt.x ) / 2,
					( getSize( ).y - pt.y ) / 2 + pt.y,
					( getSize( ).x - pt.x ) / 2 + pt.x,
					( getSize( ).y - pt.y ) / 2 + pt.y );
		}
		if ( isLinethrough )
		{
			gc.drawLine( ( getSize( ).x - pt.x ) / 2,
					( getSize( ).y - pt.y ) / 2 + pt.y / 2,
					( getSize( ).x - pt.x ) / 2 + pt.x,
					( getSize( ).y - pt.y ) / 2 + pt.y / 2 );
		}
		if ( isOverline )
		{
			gc.drawLine( ( getSize( ).x - pt.x ) / 2,
					( getSize( ).y - pt.y ) / 2,
					( getSize( ).x - pt.x ) / 2 + pt.x,
					( getSize( ).y - pt.y ) / 2 );
		}
	}
}