/* Copyright 2002-2005 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ojb.tools.mapping.reversedb2.ojbmetatreemodel;
import org.apache.ojb.tools.mapping.reversedb2.dnd2.*;
import java.awt.Component;
import java.awt.datatransfer.Transferable;
import java.awt.Image;
import org.apache.ojb.broker.metadata.AttributeDescriptorBase;
/**
*
* @author Florian Bruckner
*/
public class OjbMetaTreeNodesDragWorker implements DragCopyCutWorkerInterface
{
/** Creates a new instance of OjbMetaTreeNodesDragWorker */
public OjbMetaTreeNodesDragWorker()
{
}
/** Is called to notify you that the export this Worker has been notified of
* has finished. action shows you which action has been performed, e.g. if it
* is DRAG_MOVE you can remove the dragged items from your model.
* @param c The component that acts as the drag source
* @param action The drag action that has been performed
*
*/
public void exportDone(Component c, int action)
{
}
/** Is called to notify you that the export has started. This is always
* called after getTransferable, so you should know which items are exported.
* This method is currently not called by the framework, but may be in future.
* @param c The component that acts as the drag source
* @param action The drag action that is going to be performed
*
*/
public void exportStarted(Component c, int action)
{
}
/** Return a bitmask of acceptable actions. In most cases you will only support
* DRAG_COPY, but sometimes you might support DRAG_LINK or DRAG_MOVE as well.
* @param c The component that acts as the drag source
* @return A bitmask of possible drag actions for the given Component
*
*/
public int getAcceptableActions(Component c)
{
if (c instanceof javax.swing.JTree
&& ((javax.swing.JTree)c).getModel() instanceof OjbMetaDataTreeModel)
return DnDWorkerConstants.DRAG_COPY | DnDWorkerConstants.DRAG_LINK;
else return DnDWorkerConstants.NONE;
}
/** DnD on some platforms supports displaying a drag image in addition
* to the drag cursor (Windows is known not to support it, so if you are
* on Windows you might be doing all right, but still see no image)
* @return an Image that shall be displayed with the cursor.
* @param c The component that acts as the drag source
* @param t The transferable that is used in this DnD process
* @param action The currently requested action for the ongoing drag process
*
*/
public Image getDragImage(Component c, Transferable t, int action)
{
return null;
}
/** Return a Transferable with the data you whish to export. You also get
* the Component the DnD actions has been started for. If the component
* supports selection you must first check which items are selected and
* afterwards put those items in the Transferable.
* @param c The component that acts as the drag source
* @return a Transferable containing the exported data
*
*/
public Transferable getTransferable(Component c)
{
if (c instanceof javax.swing.JTree
&& ((javax.swing.JTree)c).getModel() instanceof OjbMetaDataTreeModel)
{
try
{
javax.swing.JTree tree = (javax.swing.JTree)c;
OjbMetaDataTreeModel model = (OjbMetaDataTreeModel)tree.getModel();
AttributeDescriptorBase descriptors[] = new AttributeDescriptorBase[tree.getSelectionCount()];
for (int i = 0; tree.getSelectionPaths() != null && i < tree.getSelectionPaths().length; i++)
{
Object o = ((OjbMetaTreeNode)tree.getSelectionPaths()[i].getLastPathComponent()).getAssociatedDescriptor();
if (o instanceof AttributeDescriptorBase)
{
System.err.println(" adding Node" + o);
descriptors[i] = (AttributeDescriptorBase) o;
}
}
return new OjbMetadataTransferable(descriptors);
}
catch (Throwable t)
{
t.printStackTrace();
}
}
return null;
}
}