Bug 136538 chart cannot inherite table's columns binding when drag into table's group header
steps to reproduce: - create a table - define columns binding - insert a group - drag a chart into table's group header expected behavior: - chart can inherite table's columns binding actual behavior: - it simply couldn't
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/extension/ExtendedEditPart.java
}
	/**
	 * @return The constraint
	 */
	protected Object getConstraint( )
	{
		ExtendedItemHandle handle = getExtendedItemHandle( );
		ReportItemConstraint constraint = new ReportItemConstraint( );
		String type = handle.getPrivateStyle( ).getDisplay( );
		if ( type == null )
		{
			type = DesignChoiceConstants.DISPLAY_BLOCK;
		}
		constraint.setDisplay( type );
		constraint.setMargin(  getModelAdapter( ).getMargin( null ) ); 
		return constraint;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
	 */
	protected IFigure createFigure( )
	{
		return getExtendedElementUI( ).createFigure( getExtendedItemHandle( ) );
	}
	public void performDirectEdit( )
	{
		IReportItemBuilderUI builder = ExtensionPointManager.getInstance( )
				.getExtendedElementPoint( ( (ExtendedItemHandle) getModel( ) ).getExtensionName( ) )