Bug 161429 center position missing for gantt chart
When designing a gantt chart, it should be possible to display the labels inside the bar, using a new "center" attribute. See how it should like in UI and output in attached screenshot.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/format/popup/series/SeriesLabelSheet.java
}
	private void addDataPointComponent( int iComponentIndex )
	{
		DataPoint dp = getSeriesForProcessing( ).getDataPoint( );
		DataPointComponent dpc = null;
		String dpDisplayName = lstComponents.getItem( iComponentIndex );
		if ( mapDataPointNames.containsKey( dpDisplayName ) )
		{
			
			dpc = DataPointComponentImpl.create( DataPointComponentType.ORTHOGONAL_VALUE_LITERAL,
					null );
			dpc.setOrthogonalType( (String) mapDataPointNames.get( dpDisplayName ) );
		}
		else
		{
			DataPointComponentType dpct = DataPointComponentType.getByName( LiteralHelper.dataPointComponentTypeSet.getNameByDisplayName( lstComponents.getItem( iComponentIndex ) ) );
			dpc = DataPointComponentImpl.create( dpct, null );
			
			if ( dpct == DataPointComponentType.PERCENTILE_ORTHOGONAL_VALUE_LITERAL )
			{
				JavaNumberFormatSpecifier fs = JavaNumberFormatSpecifierImpl.create( "##.##%" ); 
				dpc.setFormatSpecifier( fs );
			}
		}
		dpc.eAdapters( ).addAll( dp.eAdapters( ) );
		dp.getComponents( ).add( dpc );
		dataPointIndex.add( iComponentIndex, new Integer( dp.getComponents( )
				.size( ) - 1 ) );
	}
	private void setDataPointComponentFormatSpecifier( int iComponentIndex )