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index.zulzul<zk>
<div
apply="pkg$.TreeReproComposer">
<tree id="tree" height="800px" width="600px" checkmark="true">
<treecols>
<treecol label="Name" />
</treecols>
</tree>
</div>
</zk>TreeReproComposer.javajava
import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.tree.DefaultTreeModel;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.select.SelectorComposer;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.Tree;
import org.zkoss.zul.TreeModel;
import org.zkoss.zul.TreeNode;
public class TreeReproComposer extends SelectorComposer<Component> {
@Wire
private Tree tree;
private MyTreeModel myModel;
@Override
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
DefaultTreeNode<String> root = new DefaultTreeNode<String>("root", new ArrayList<DefaultTreeNode<String>>());
myModel = new MyTreeModel(root);
buildChildrenRecursivelly(root, 5);
myModel.setMultiple(true);
tree.setModel(myModel);
}
private void buildChildrenRecursivelly(DefaultTreeNode<String> node, int depth) {
if(depth>0) {
for (int j = 0; j < 2; j++) {
DefaultTreeNode<String> newNode = new DefaultTreeNode<String>(depth + " - " + j, new ArrayList<DefaultTreeNode<String>>());
node.add(newNode);
myModel.addOpenObject(newNode);
buildChildrenRecursivelly(newNode, depth-1);
}
}
}
}
MyTreeModel.javajava
import org.zkoss.zul.AbstractTreeModel;
import org.zkoss.zul.DefaultTreeNode;
public class MyTreeModel extends AbstractTreeModel<DefaultTreeNode<String>> {
public MyTreeModel(DefaultTreeNode<String> root) {
super(root);
}
@Override
public boolean isLeaf(DefaultTreeNode<String> node) {
return node.getChildCount()==0;
}
@Override
public DefaultTreeNode<String> getChild(DefaultTreeNode<String> parent, int index) {
if(index < parent.getChildCount()) {
return (DefaultTreeNode<String>) parent.getChildAt(index);
}else {
System.out.println("Tree tried to access item index " + index + " out of a max index of " + (parent.getChildCount() - 1));
return null;
}
}
@Override
public int getChildCount(DefaultTreeNode<String> parent) {
return parent.getChildCount();
}
}