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
int positionScope = ( getSeriesForProcessing( ) instanceof PieSeries || getSeriesForProcessing( ) instanceof BarSeries )
				? LabelAttributesComposite.ALLOW_INOUT_POSITION
				: ( LabelAttributesComposite.ALLOW_HORIZONTAL_POSITION | LabelAttributesComposite.ALLOW_VERTICAL_POSITION );
		Position lpCurrent = getSeriesForProcessing( ).getLabelPosition( );
		if ( positionScope == LabelAttributesComposite.ALLOW_ALL_POSITION )
		{
			cmbPosition.setItems( LiteralHelper.fullPositionSet.getDisplayNames( ) );
			if ( lpCurrent != null )
			{
				if ( context.getModel( ) instanceof ChartWithAxes )
				{
					cmbPosition.select( LiteralHelper.fullPositionSet.getSafeNameIndex( ChartUIUtil.getFlippedPosition( lpCurrent,
							isFlippedAxes( ) )
							.getName( ) ) );
				}
				else
				{
					cmbPosition.select( LiteralHelper.fullPositionSet.getSafeNameIndex( lpCurrent.getName( ) ) );
				}
			}
		}
		else
		{
			
			if ( ( positionScope & LabelAttributesComposite.ALLOW_VERTICAL_POSITION ) != 0 )
			{
				if ( context.getModel( ) instanceof ChartWithAxes
						&& isFlippedAxes( ) )
				{