Bug 199009 [Automation][Regression] 2D percent stacked area chart did not render properly
steps to reproduce: - use the attached report design - preview in html expected behavior: - chart was renderred properly actual behavior: - it simply did not do so please refer to the attached screen captures
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/PaletteEditorComposite.java
}
			iViewY = iMoveUpTo * iItemHeight;
		}
		else
		{
			
			int iY = ( iIndex - iStartIndex )
					* iItemHeight
					- ( iViewY % iItemHeight );
			if ( iY + iItemHeight > iViewHeight ) 
			{
				iViewY += iY + iItemHeight - iViewHeight;
			}
		}
		updateScrollBar( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.swt.events.ControlListener#controlResized(org.eclipse.swt.events.ControlEvent)
	 */
	public void controlResized( ControlEvent arg0 )
	{
		updateScrollBar( );
		if ( imgBuffer != null )
		{
			gc.dispose( );
			imgBuffer.dispose( );
			gc = null;
			imgBuffer = null;