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
import org.eclipse.birt.chart.model.ChartWithAxes;
import org.eclipse.birt.chart.model.attribute.AttributePackage;
import org.eclipse.birt.chart.model.attribute.ChartDimension;
import org.eclipse.birt.chart.model.attribute.ColorDefinition;
import org.eclipse.birt.chart.model.attribute.DataPoint;
import org.eclipse.birt.chart.model.attribute.DataPointComponent;
import org.eclipse.birt.chart.model.attribute.DataPointComponentType;
import org.eclipse.birt.chart.model.attribute.Fill;
import org.eclipse.birt.chart.model.attribute.FontDefinition;
import org.eclipse.birt.chart.model.attribute.FormatSpecifier;
import org.eclipse.birt.chart.model.attribute.Insets;
import org.eclipse.birt.chart.model.attribute.JavaNumberFormatSpecifier;
import org.eclipse.birt.chart.model.attribute.LineStyle;
import org.eclipse.birt.chart.model.attribute.Orientation;
import org.eclipse.birt.chart.model.attribute.Position;
import org.eclipse.birt.chart.model.attribute.impl.DataPointComponentImpl;
import org.eclipse.birt.chart.model.attribute.impl.JavaNumberFormatSpecifierImpl;
import org.eclipse.birt.chart.model.component.Series;
import org.eclipse.birt.chart.model.data.SeriesDefinition;
import org.eclipse.birt.chart.model.type.BarSeries;
import org.eclipse.birt.chart.model.type.PieSeries;
import org.eclipse.birt.chart.ui.extension.i18n.Messages;
import org.eclipse.birt.chart.ui.swt.composites.FillChooserComposite;
import org.eclipse.birt.chart.ui.swt.composites.FontDefinitionComposite;
import org.eclipse.birt.chart.ui.swt.composites.FormatSpecifierDialog;
import org.eclipse.birt.chart.ui.swt.composites.InsetsComposite;
import org.eclipse.birt.chart.ui.swt.composites.LabelAttributesComposite;
import org.eclipse.birt.chart.ui.swt.composites.LineAttributesComposite;
import org.eclipse.birt.chart.ui.swt.composites.TextEditorComposite;
import org.eclipse.birt.chart.ui.swt.wizard.ChartWizardContext;