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The source code
/*
* Sun Public License Notice
*
* The contents of this file are subject to the Sun Public License
* Version 1.0 (the "License"). You may not use this file except in
* compliance with the License. A copy of the License is available at
* http://www.sun.com/
*
* The Original Code is NetBeans. The Initial Developer of the Original
* Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
* Microsystems, Inc. All Rights Reserved.
*/
package org.openide.explorer.view;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants; // TEMP
import java.util.Iterator;
import javax.swing.JScrollPane;
import org.openide.nodes.Node;
import org.openide.util.WeakSet;
/**
* Manager for explorer DnD.
*
*
* @author Jiri Rechtacek
*
* @see TreeViewDragSupport
* @see TreeViewDropSupport
*/
final class ExplorerDnDManager {
/** Singleton instance of explorer dnd manager. */
private static ExplorerDnDManager defaultDnDManager;
/** Creates a new instance of WindowsDnDManager . */
private ExplorerDnDManager () {
}
private Node[] draggedNodes;
private Transferable draggedTransForCut;
private Transferable draggedTransForCopy;
private boolean isDnDActive = false;
private int allowedActions = 0;
private int supportedActions = DnDConstants.ACTION_MOVE | DnDConstants.ACTION_COPY |
DnDConstants.ACTION_LINK;
private transient WeakSet setOfTargets;
/** Gets the singleton instance of this window dnd manager. */
static synchronized ExplorerDnDManager getDefault () {
if (defaultDnDManager == null) {
defaultDnDManager = new ExplorerDnDManager ();
}
return defaultDnDManager;
}
void setDraggedNodes (Node[] n) {
draggedNodes = n;
}
Node[] getDraggedNodes () {
return draggedNodes;
}
void setDraggedTransferable (Transferable trans, boolean isCut) {
if (isCut) {
draggedTransForCut = trans;
} else {
draggedTransForCopy = trans;
}
}
Transferable getDraggedTransferable (boolean isCut) {
if (isCut) {
return draggedTransForCut;
}
// only for copy
return draggedTransForCopy;
}
void setAllowedDragActions (int actions) {
allowedActions= actions;
}
int getAllowedDragActions () {
if (allowedActions==0) {
return DnDConstants.ACTION_NONE;
}
return allowedActions;
}
void setSupportedDragActions (int actions) {
supportedActions= actions;
}
int getSupportedDragActions () {
if (supportedActions==0) {
return DnDConstants.ACTION_NONE;
}
return supportedActions;
}
void setDnDActive (boolean state) {
isDnDActive = state;
if (setOfTargets != null && !setOfTargets.isEmpty ()) {
Iterator it = setOfTargets.iterator();
while (it.hasNext ()) {
JScrollPane pane = (JScrollPane)it.next ();
if (pane.isEnabled ()) {
if (pane instanceof TreeView) {
((TreeView)pane).setDropTarget (state);
} else if (pane instanceof ListView) {
((ListView)pane).setDropTarget (state);
}
}
}
}
}
boolean isDnDActive () {
return isDnDActive;
}
void addFutureDropTarget (JScrollPane view) {
if (setOfTargets == null)
setOfTargets = new WeakSet ();
setOfTargets.add (view);
}
}
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