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
lstComponents = new List( grpDataPoint, SWT.BORDER | SWT.SINGLE );
		GridData gdLSTComponents = new GridData( GridData.FILL_BOTH );
		gdLSTComponents.horizontalSpan = 4;
		lstComponents.setLayoutData( gdLSTComponents );
		lstComponents.addSelectionListener( this );
		
		btnFormatSpecifier = new Button( grpDataPoint, SWT.PUSH );
		GridData gdBTNFormatSpecifier = new GridData( );
		btnFormatSpecifier.setLayoutData( gdBTNFormatSpecifier );
		btnFormatSpecifier.setToolTipText( Messages.getString( "Shared.Tooltip.FormatSpecifier" ) ); 
		btnFormatSpecifier.setImage( UIHelper.getImage( "icons/obj16/formatbuilder.gif" ) ); 
		btnFormatSpecifier.getImage( )
				.setBackground( btnFormatSpecifier.getBackground( ) );
		btnFormatSpecifier.addSelectionListener( this );
		btnRemoveComponent = new Button( grpDataPoint, SWT.PUSH );
		GridData gdBTNRemoveComponent = new GridData( );
		btnRemoveComponent.setLayoutData( gdBTNRemoveComponent );
		btnRemoveComponent.setText( Messages.getString( "OrthogonalSeriesAttributeSheetImpl.Lbl.Remove" ) ); 
		btnRemoveComponent.addSelectionListener( this );
		
		btnAddComponent = new Button( grpDataPoint, SWT.PUSH );
		GridData gdBTNAddComponent = new GridData( );
		btnAddComponent.setLayoutData( gdBTNAddComponent );
		btnAddComponent.setText( Messages.getString( "OrthogonalSeriesAttributeSheetImpl.Lbl.Add" ) ); 
		btnAddComponent.addSelectionListener( this );
		
		cmbComponentTypes = new Combo( grpDataPoint, SWT.DROP_DOWN
				| SWT.READ_ONLY );
		GridData gdCMBComponentTypes = new GridData( GridData.FILL_HORIZONTAL );
		gdCMBComponentTypes.grabExcessHorizontalSpace = true;