Bug 192347 [acceptance]Theme cannot be deleted[01]
Description: [acceptance]Theme cannot be deleted Build number:2.2.0.v20070613 Steps to reproduce: 1. New a library. 2. New a theme and delete it. Expected result: Theme can be deleted Actual result: Delete key doesn't work and no delete item in context menu. Error log:n/a
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
if ( !childHandle.getElement( ).getDefn( ).canExtend( ) )
			{
				return CONTAIN_NO;
			}
			return targetHandle.getElementHandle( )
					.canContain( targetHandle.getSlotID( ), childHandle ) ? CONTAIN_THIS
					: CONTAIN_NO;
		}
		return CONTAIN_NO;
	}
	protected static int handleValidateTargetCanContainByContainer(
			Object targetObj, Object[] childHandles, boolean validateContainer )
	{
		if ( childHandles.length == 0 )
		{
			return CONTAIN_NO;
		}
		for ( int i = 0; i < childHandles.length; i++ )
		{
			if ( !( childHandles[i] instanceof DesignElementHandle )
					|| handleValidateTargetCanContainByContainer( targetObj,
							(DesignElementHandle) childHandles[i],
							validateContainer ) == CONTAIN_NO )
			{
				return CONTAIN_NO;
			}
		}
		return CONTAIN_THIS;
	}
	protected static int handleValidateTargetCanContainElementHandle(