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index.zulzul<?xml version="1.0" encoding="UTF-8"?>
<!--
B70-ZK-2589.zul
Purpose:
Description:
History:
Mon, Jan 26, 2015 4:44:37 PM, Created by Chunfu
Copyright (C) Potix Corporation. All Rights Reserved.
-->
<zk>
<zscript><![CDATA[
import pkg$.B70_ZK_2589HierarchyTreeModel;
TreeModel model = new B70_ZK_2589HierarchyTreeModel("test");
model.setMultiple(true);
]]></zscript>
<label multiline="true">
1. scroll down slightly
2. open one of these nodes
3. close it again
4. scroll down to the bottom
5. you should see all nodes rendered properly
</label>
<tree model="${model}" height="300px" checkmark="true" width="350px" mold="paging" pageSize="59">
<treecols>
<treecol label="col 1"/>
<treecol label="col 2"/>
</treecols>
<template name="model">
<treeitem>
<treerow>
<treecell>
<label value="${each.data}" />
</treecell>
<treecell>
<label value="${each.data}" />
</treecell>
</treerow>
</treeitem>
</template>
</tree>
</zk>
B70_ZK_2589HierarchyTreeModel.javajava
import org.zkoss.zul.AbstractTreeModel;
public class B70_ZK_2589HierarchyTreeModel extends AbstractTreeModel<B70_ZK_2589Hierarchy<String>> {
private static final long serialVersionUID = 1L;
public B70_ZK_2589HierarchyTreeModel(String data) {
super(new B70_ZK_2589Hierarchy<String>(data, false));
}
public boolean isLeaf(B70_ZK_2589Hierarchy<String> node) {
return node.isLeaf();
}
public B70_ZK_2589Hierarchy<String> getChild(B70_ZK_2589Hierarchy<String> parent, int index) {
if(parent.getChildren() == null) {
System.out.println("loading children of: " + parent.getData());
//alternatively load from DB here
for(int i = 0; i < getChildCount(parent); i++) {
String childData = parent.getData() + "-" + (i + 1);
parent.addChildData(childData, parent.getLevel() >= 2);
}
}
return parent.getChildren().get(index);
}
public int getChildCount(B70_ZK_2589Hierarchy<String> parent) {
//alternatively load from DB here
return parent.isLeaf() ? 0 : 60;
}
}B70_ZK_2589Hierarchy.javajava
import java.util.ArrayList;
import java.util.List;
public class B70_ZK_2589Hierarchy<T> {
private B70_ZK_2589Hierarchy<T> parent;
private List<B70_ZK_2589Hierarchy<T>> children;
private T data;
private boolean leaf;
public B70_ZK_2589Hierarchy(T childData, boolean leaf) {
this.data = childData;
this.leaf = leaf;
}
public B70_ZK_2589Hierarchy<T> getParent() {
return parent;
}
public void setParent(B70_ZK_2589Hierarchy<T> parent) {
this.parent = parent;
}
public List<B70_ZK_2589Hierarchy<T>> getChildren() {
return children;
}
public T getData() {
return data;
}
public void addChildData(T childData, boolean leaf) {
if(children == null) {
children = new ArrayList<B70_ZK_2589Hierarchy<T>>();
}
B70_ZK_2589Hierarchy<T> child = new B70_ZK_2589Hierarchy<T>(childData, leaf);
child.setParent(this);
this.getChildren().add(child);
}
public int getLevel() {
if(this.parent == null) {
return 0;
} else {
return this.getParent().getLevel() + 1;
}
}
public boolean isLeaf() {
return leaf;
}
}