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index.zulzul<zk>
<window border="normal" title="hello" apply="pkg$.TestComposer">
<div>This demonstrates a problem with the fireEvent Method in TreeModel when trying to render an item which has the attribute selected = true.</div>
<button id="btnRemove" label="First remove" />
<button id="btnAdd" label="Then add" />
<tree id="tree" height="200px" width="200px"/>
</window>
</zk>
TestComposer.javajavaimport org.zkoss.zk.ui.*;
import org.zkoss.zk.ui.event.*;
import org.zkoss.zk.ui.util.*;
import org.zkoss.zk.ui.ext.*;
import org.zkoss.zk.au.*;
import org.zkoss.zk.au.out.*;
import org.zkoss.zul.*;
import java.util.*;
public class TestComposer extends GenericForwardComposer{
Tree tree;
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
tree = (Tree)comp.getFellow("tree");
tree.setItemRenderer(new TreeitemRenderer() {
public void render(Treeitem item, Object data) {
item.setLabel((String)((TestNode)data).getLabel());
// THIS IS THE PROBLEM!
item.setSelected(true);
}
});
// some example content
TestNode node1 = new TestNode("test");
List<TestNode> list = new ArrayList<TestNode>();
list.add(node1);
TestNode node2 = new TestNode("test2",list);
TestTreeModel model = new TestTreeModel(node2);
tree.setModel(model);
}
public void onClick$btnAdd(Event e) throws InterruptedException{
((TestTreeModel)tree.getModel()).add();
}
public void onClick$btnRemove(Event e) throws InterruptedException{
((TestTreeModel)tree.getModel()).remove();
}
}
TestTreeModel.javajava
import org.zkoss.zul.*;
import org.zkoss.zul.event.*;
public class TestTreeModel extends AbstractTreeModel{
public TestTreeModel(TestNode root) {
super(root);
}
public void remove() {
((TestNode)getRoot()).getChildren().remove(0);
this.fireEvent(getRoot(), 0, 0,
TreeDataEvent.INTERVAL_REMOVED);
}
public void add() {
((TestNode)getRoot()).getChildren().add(new TestNode("test"));
this.fireEvent(getRoot(), 0, 0,
TreeDataEvent.INTERVAL_ADDED);
}
/**
* @see org.zkoss.zul.TreeModel#getChild(java.lang.Object, int)
*/
public Object getChild(final Object parentObject, final int index)
{
TestNode node = (TestNode)parentObject;
return node.getChildren().get(index);
}
/**
* @see org.zkoss.zul.TreeModel#getChildCount(java.lang.Object)
*/
public int getChildCount(final Object parentObject)
{
return ((TestNode)parentObject).getChildren().size();
}
/**
* @see org.zkoss.zul.TreeModel#isLeaf(java.lang.Object)
*/
public boolean isLeaf(final Object parentObject)
{
return getChildCount(parentObject) == 0;
}
@Override
public int getIndexOfChild(Object parent, Object child)
{
TestNode node = (TestNode)parent;
return node.getChildren().indexOf((TestNode)child);
}
}
TestNode.javajavaimport org.zkoss.zk.ui.*;
import org.zkoss.zk.ui.event.*;
import org.zkoss.zk.ui.util.*;
import org.zkoss.zk.ui.ext.*;
import org.zkoss.zk.au.*;
import org.zkoss.zk.au.out.*;
import org.zkoss.zul.*;
import java.util.*;
public class TestNode {
List<TestNode> children;
String label;
public TestNode(String label) {
this(label, new ArrayList<TestNode>());
}
public TestNode(String label, List<TestNode> children) {
this.label = label;
this.children = children;
}
public String getLabel() {
return label;
}
public List<TestNode> getChildren() {
return children;
}
}