Bug 120503 Cascading Parameter can not drop into layout
Details: Cascading Parameter can not drop into layout Step: 1.Open a report design and Create a Sample Data Source and data set by "select * from CLASSICMODELS.CUSTOMERS" 2.New a cascading parameter and create CUSTOMERSNUMBER and CUSTOMERSNAME in parameter named number and name. Press OK 3.Drop parameter name into layout. Actual results: The parameter in Cascading Parameter Group can not drop to layout
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
if ( element instanceof LabelHandle )
		{
			actionHandle = ( (LabelHandle) element ).setAction( action );
		}
		else if ( element instanceof DataItemHandle )
		{
			actionHandle = ( (DataItemHandle) element ).setAction( action );
		}
		else if ( element instanceof ImageHandle )
		{
			actionHandle = ( (ImageHandle) element ).setAction( action );
		}
		return actionHandle;
	}
	private static Object getModelFontSize( DesignElementHandle handle )
	{
		
		
		
		StyleHandle styleHandle = handle.getPrivateStyle( );
		Object fontSizeValue = null;
		if ( styleHandle != null )
		{
			fontSizeValue = handle.getPrivateStyle( ).getFontSize( ).getValue( );
		}
		return fontSizeValue;
	}
	public static List getDataSets( )
	{
		return SessionHandleAdapter.getInstance( ).getReportDesignHandle( )