/*
* Ext GWT 2.2.0 - Ext for GWT
* Copyright(c) 2007-2010, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
package com.extjs.gxt.ui.client.dnd;
import java.util.ArrayList;
import java.util.List;
import com.extjs.gxt.ui.client.binder.TreeBinder;
import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.data.TreeModel;
import com.extjs.gxt.ui.client.dnd.DND.Operation;
import com.extjs.gxt.ui.client.dnd.DND.TreeSource;
import com.extjs.gxt.ui.client.event.DNDEvent;
import com.extjs.gxt.ui.client.store.TreeStore;
import com.extjs.gxt.ui.client.util.Format;
import com.extjs.gxt.ui.client.widget.tree.Tree;
import com.extjs.gxt.ui.client.widget.tree.TreeItem;
/**
* A <code>DragSource</code> implementation for Trees.
*
* @deprecated {@link TreePanelDragSource}
*/
public class TreeDragSource extends DragSource {
protected Tree tree;
protected TreeSource treeSource = TreeSource.BOTH;
protected TreeBinder<ModelData> binder;
/**
* Creates a new drag source instance. The default code will set the selected
* TreeItems as the data being dragged.
*
* @param tree the source tree
*/
public TreeDragSource(Tree tree) {
super(tree);
this.tree = tree;
setStatusText("{0} items selected");
}
/**
* Creates a new drag source instance. The default code will set a list of
* TreeModels as the data being dragged. Each TreeModel instance is retrieved
* from the {@link TreeStore#getModelState(ModelData)}.
*
* @param binder the tree binder
*/
public TreeDragSource(TreeBinder<ModelData> binder) {
this(binder.getTree());
this.binder = binder;
}
/**
* Returns the type if items that can be dragged.
*
* @return the tree source type
*/
public TreeSource getTreeSource() {
return treeSource;
}
/**
* Sets witch tree items can be dragged (defaults to BOTH).
*
* @param treeSource the tree source type
*/
public void setTreeSource(TreeSource treeSource) {
this.treeSource = treeSource;
}
@Override
protected void onDragDrop(DNDEvent event) {
if (event.getOperation() == Operation.MOVE) {
if (binder != null) {
List<TreeModel> sel = event.getData();
for (TreeModel tm : sel) {
ModelData m = (ModelData)tm.get("model");
ModelData p = binder.getTreeStore().getParent(m);
if (p != null) {
binder.getTreeStore().remove(p, m);
} else {
binder.getTreeStore().remove(m);
}
}
} else {
List<TreeItem> sel = event.getData();
for (TreeItem item : sel) {
TreeItem p = item.getParentItem();
if (p != null) {
p.remove(item);
}
}
}
}
}
@Override
@SuppressWarnings({"unchecked", "rawtypes"})
protected void onDragStart(DNDEvent e) {
TreeItem item = tree.findItem(e.getTarget());
if (item == null || e.getTarget(".my-tree-joint", 3) != null) {
e.setCancelled(true);
return;
}
boolean leaf = treeSource == TreeSource.LEAF || treeSource == TreeSource.BOTH;
boolean node = treeSource == TreeSource.NODE || treeSource == TreeSource.BOTH;
List<TreeItem> sel = tree.getSelectionModel().getSelectedItems();
if (sel.size() > 0) {
boolean ok = true;
for (TreeItem ti : sel) {
if ((leaf && ti.isLeaf()) || (node && !ti.isLeaf())) {
continue;
}
ok = false;
break;
}
if (ok) {
if (sel.get(0).getModel() != null) {
List models = new ArrayList();
for (TreeItem ti : sel) {
models.add(binder.getTreeStore().getModelState((ModelData)ti.getModel()));
}
e.setData(models);
} else {
e.setData(sel);
}
e.setCancelled(false);
e.getStatus().update(Format.substitute(getStatusText(), sel.size()));
} else {
e.setCancelled(true);
}
} else {
e.setCancelled(true);
}
}
}