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index.zulzul<zk>
<!-- tested with ZK 6.5.1.1 -->
<window apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('test.TestVM')">
<hlayout>
Selected Node (as path):
<label value="@load(vm.selectedNodePath)" />
</hlayout>
<hlayout>
Add or Append to child:
<textbox value="@bind(vm.valueToAdd)" />
<button label="Add" onClick="@command('addValue')" />
<button label="Append to child" onClick="@command('appendValueToChild')" />
</hlayout>
<hlayout>
<button label="Delete" onClick="@command('removeSelectedNode')" />
</hlayout>
<hlayout>
Update:
<textbox value="@bind(vm.valueToUpdate)" />
<button label="Update Value" onClick="@command('updateSelectedNode')" />
</hlayout>
<tree id="tree" model="@bind(vm.model)"
width="600px" height="200px"
onSelect="@command('keepSelectedNode')">
<treecols>
<treecol label="data" />
</treecols>
<template name="model" var="node">
<treeitem>
<treerow>
<treecell label="@bind(node.data)" />
</treerow>
</treeitem>
</template>
</tree>
</window>
</zk>
TestVM.javajavaimport java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.ContextParam;
import org.zkoss.bind.annotation.ContextType;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.zk.ui.event.SelectEvent;
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.Tree;
import org.zkoss.zul.TreeModel;
/**
* tested with ZK 6.5.1.1
*
* @author benbai
*
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class TestVM {
File file = new File("C:" + File.separator + "Program Files");
DefaultTreeModel _model;
DefaultTreeNode _selectedNode;
String _valueToAdd;
String _valueToUpdate;
public TreeModel<DefaultTreeNode<String>> getModel () {
DefaultTreeNode root = new DefaultTreeNode(null,
new DefaultTreeNode[] {new DefaultTreeNode("aaa", (List)null)
});
if (_model == null) {
_model = new DefaultTreeModel<String>(root);
}
return _model;
}
public void setValueToAdd (String valueToAdd) {
_valueToAdd = valueToAdd;
}
public String getValueToAdd () {
return _valueToAdd;
}
public void setValueToUpdate (String valueToUpdate) {
_valueToUpdate = valueToUpdate;
}
public String getValueToUpdate () {
return _valueToUpdate;
}
public String getSelectedNodePath () {
StringBuilder sb = new StringBuilder("");
if (_selectedNode != null) {
List<DefaultTreeNode> nodes = new ArrayList<DefaultTreeNode>();
DefaultTreeNode node = _selectedNode;
while (node.getParent() != null) {
nodes.add(0, node);
node = (DefaultTreeNode)node.getParent();
}
for (int i = 0; i < nodes.size(); i++) {
if (i > 0) {
sb.append(" - ");
}
sb.append(nodes.get(i).getData());
}
}
return sb.toString();
}
@Command
@NotifyChange("selectedNodePath")
public void keepSelectedNode (@ContextParam(ContextType.TRIGGER_EVENT) SelectEvent event) {
_selectedNode = ((Tree)event.getTarget()).getSelectedItem().getValue();
}
@Command
@NotifyChange("model")
public void addValue () {
addNode(false);
}
@Command
public void appendValueToChild () {
addNode(true);
}
@Command
@NotifyChange("selectedNodePath")
public void removeSelectedNode () {
if (_selectedNode != null) {
_selectedNode.getParent().remove(_selectedNode);
_selectedNode = null;
}
}
@Command
@NotifyChange({"model", "selectedNodePath"}) // 6.5.1 bug, node becomes leaf node after setData
public void updateSelectedNode () {
if (_valueToUpdate != null
&& _selectedNode != null) {
_selectedNode.setData(_valueToUpdate);
}
}
public void addNode (boolean asChild) {
if (_valueToAdd != null && !_valueToAdd.isEmpty()
&& _selectedNode != null) {
DefaultTreeNode parent = asChild? _selectedNode : (DefaultTreeNode)_selectedNode.getParent();
List children = parent.getChildren();
if (asChild) {
parent.add(new DefaultTreeNode(_valueToAdd, (List)null));
} else {
children.add(children.indexOf(_selectedNode)+1, new DefaultTreeNode(_valueToAdd, (List)null));
}
}
}
}