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index.zulzul<zk>
<div apply="pkg$.CascaderComposer">
<cascader id="cascader" width="360px"/>
<separator/>
<button id="selectNodeInModel" label="Select 'Node 2.3' in Model"/>
</div>
</zk>CascaderComposer.javajava
import org.zkoss.util.Converter;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.OpenEvent;
import org.zkoss.zk.ui.event.SelectEvent;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Listen;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zk.ui.util.Notification;
import org.zkoss.zkmax.zul.Cascader;
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.ItemRenderer;
import org.zkoss.zul.TreeNode;
import java.util.Collection;
import java.util.stream.Collectors;
public class CascaderComposer extends SelectorComposer {
@Wire
private Cascader cascader;
private DefaultTreeModel model;
@Override
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
cascader.setPlaceholder("select your node");
model = CascaderData.buildModel();
cascader.setModel(model);
cascader.setItemRenderer(itemRenderer());
cascader.setItemConverter(itemConverter());
}
private Converter<Collection<TreeNode<MyNodeData>>, String> itemConverter() {
return nodePath -> nodePath.stream()
.map(node -> node.getData().getLabel())
.collect(Collectors.joining(" > "));
}
private ItemRenderer<TreeNode<MyNodeData>> itemRenderer() {
return (component, data, i) ->
data.getData().getLabel();
}
@Listen("onClick=#selectNodeInModel")
public void onSelectNodeInModel() {
model.addSelectionPath(new int[]{1, 2});
}
@Listen("onSelect=#cascader")
public void onCascaderSelect(SelectEvent event) {
Notification.show("selected item: " +
event.getSelectedObjects() +
"<br/><br/>" +
"selected path: " +
cascader.getSelectedItems());
}
}CascaderData.javajava
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import java.util.List;
import static java.util.Arrays.asList;
public class CascaderData {
public static DefaultTreeModel<MyNodeData> buildModel() {
return new DefaultTreeModel<>(node("root", asList(
node("Node-1"),
node("Node-2", asList(
node("Node-2.1"),
node("Node-2.2", asList(
node("Node-2.2.1"),
node("Node-2.2.2"),
node("Node-2.2.3"),
node("Node-2.2.4"),
node("Node-2.2.5"))
),
node("Node-2.3", asList(
node("Node-2.3.1"),
node("Node-2.3.2", asList(
node("Node-2.3.2.1"),
node("Node-2.3.2.2"))
),
node("Node-2.3.3"))
),
node("Node-2.4"))
),
node("Node-3"),
node("Node-4"))
));
}
private static DefaultTreeNode<MyNodeData> node(String label) {
return new DefaultTreeNode<>(new MyNodeData(label));
}
private static DefaultTreeNode<MyNodeData> node(String label, List<DefaultTreeNode<MyNodeData>> children) {
return new DefaultTreeNode<>(new MyNodeData(label), children);
}
public static class MyNodeData {
private final String label;
public MyNodeData(String label) {
this.label = label;
}
public String getLabel() {
return label;
}
@Override
public String toString() {
return "MyNodeData{" +
"label='" + label + '\'' +
'}';
}
}
}