Bug 190957 The cancel button in group level dialog in cube take no effect[1101]
Description: The cancel button in group level dialog in cube take no effect[1101] Build number: 2.2.0.v20070605-0630 Steps to reproduce: 1, New a cube 2, New a level 3, Do some operations on the level 4, Click cancel button Expected result: The cancel button can take effect to cancel all the operations Actual result: The cancel button take no effect and all the operations have done
UI/org.eclipse.birt.report.designer.ui.cubebuilder/src/org/eclipse/birt/report/designer/ui/cubebuilder/page/CubeGroupContent.java
Object element = item.getData( );
					if ( element instanceof CubeHandle
							|| element instanceof PropertyHandle )
					{
						event.detail = DND.DROP_NONE;
						return;
					}
					else
						event.detail = DND.DROP_MOVE;
					Object obj = (Object) dragSourceItems[0].getData( );
					ResultSetColumnHandle dataField = null;
					DataSetHandle dataset = null;
					if ( obj == null
							|| obj instanceof DataSetHandle
							|| ( obj instanceof VirtualField && ( (VirtualField) obj ).getType( )
									.equals( VirtualField.TYPE_OTHER_DATASETS ) ) )
					{
						event.detail = DND.DROP_NONE;
						return;
					}
					if ( obj instanceof ResultSetColumnHandle )
					{
						dataField = (ResultSetColumnHandle) obj;
						dataset = (DataSetHandle) dataField.getElementHandle( );
						if ( element instanceof LevelHandle )
						{
							DataSetHandle temp = ( (TabularHierarchyHandle) ( (LevelHandle) element ).getContainer( ) ).getDataSet( );
							if ( temp != null
									&& dataset != null
									&& dataset != temp )