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
* @return If target elements can't be dropped, return CONTAIN_NO.
	 *         <p>
	 *         If target elements can be dropped, return CONTAIN_THIS.
	 *         <p>
	 *         If target's container can be dropped, return CONTAIN_PARENT
	 */
	public static int handleValidateTargetCanContain( Object targetObj,
			Object transferData, boolean validateContainer )
	{
		if ( targetObj == null || transferData == null )
			return CONTAIN_NO;
		if ( transferData instanceof StructuredSelection )
		{
			return handleValidateTargetCanContain( targetObj,
					( (StructuredSelection) transferData ).toArray( ),
					validateContainer );
		}
		else if ( transferData instanceof Object[] )
		{
			Object[] array = (Object[]) transferData;
			if ( array.length == 1 )
			{
				return handleValidateTargetCanContain( targetObj,
						array[0],
						validateContainer );
			}
			int canContainAll = CONTAIN_NO;
			for ( int i = 0; i < array.length; i++ )
			{
				int canContain = handleValidateTargetCanContain( targetObj,