Bug 211773 Legend entries overlap
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/LegendBuilder.java
dWidth = Math.max( dWidth, dRealWidth );
		return new double[]{
				dWidth, dHeight
		};
	}
	private double[] computeHorizalByTopBottomValue( IDisplayServer xs,
			Chart cm, SeriesDefinition[] seda, RunTimeContext rtc,
			ITextMetrics itm, Label la, LegendData legendData )
			throws ChartException
	{
		double dWidth = 0, dHeight = 0;
		double dH, dMaxH = 0, dRowHeight;
		double dRealWidth = 0, dExtraHeight = 0, dDeltaWidth;
		ArrayList columnList = new ArrayList( );
		
		legendData.dSeparatorThickness += legendData.dVerticalSpacing;
		for ( int j = 0; j < seda.length; j++ )
		{
			dWidth = 0;
			List al = seda[j].getRunTimeSeries( );
			FormatSpecifier fs = seda[j].getFormatSpecifier( );
			boolean oneVisibleSerie = false;
			for ( int i = 0; i < al.size( ); i++ )
			{
				Series se = (Series) al.get( i );
				if ( se.isVisible( ) )
				{
					oneVisibleSerie = true;
				}
				else