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index.zulzul<zk>
<script><![CDATA[
zk.afterLoad("zk", function () {
var _xcmd1 = {};
zk.override(zAu.cmd1, _xcmd1, {
outer: function(t, e) {
var scrollTop = -1;
if(t && t.className == "zul.sel.Tree"){
scrollTop = t.$n("body").scrollTop;
}
var result = _xcmd1.outer.apply(this, arguments);
if(scrollTop > -1){
zk.$(t.uuid)._positionBeforeOuter = scrollTop;
}
return result;
}
});
});
]]></script>
<script><![CDATA[
zk.afterLoad("zul.sel", function () {
var _xTree = {};
zk.override(zul.sel.Tree.prototype, _xTree, {
_onDataLoading: function() {
var currentScroll = this.$n("body").scrollTop;
console.log(currentScroll);
var result = _xTree._onDataLoading.apply(this, arguments);
console.log(currentScroll);
this.$n("body").scrollTop = currentScroll;
return result;
},
_onRender: function() {
var result = _xTree._onRender.apply(this, arguments);
if(this._positionBeforeOuter){
this.$n("body").scrollTop = this._positionBeforeOuter;
delete this._positionBeforeOuter;
}
return result;
}
});
});
]]></script>
<div viewModel="@id('vm')@init('pkg$.TreeModelReplaceMvvm')">
<button label="update" onClick="@command('update')" />
<button label="delete" onClick="@command('delete')" />
<tree model="@bind(vm.model)" width="400px" height="600px">
<custom-attributes org.zkoss.zul.client.rod="true"/>
<!-- <custom-attributes org.zkoss.zul.tree.initRodSize="10"/> -->
<treecols>
<treecol label="name"/>
<treecol label="index"/>
</treecols>
<template name="model" var="node" status="s">
<treeitem>
<treerow>
<treecell label="@bind(s.index)"/>
<treecell label="@bind(node.data)"/>
</treerow>
</treeitem>
</template>
</tree>
</div>
</zk>TreeModelReplaceMvvm.javajavaimport java.util.ArrayList;
import java.util.Collections;
import org.zkoss.bind.BindUtils;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.Init;
import org.zkoss.zul.DefaultTreeModel;
import org.zkoss.zul.DefaultTreeNode;
import org.zkoss.zul.TreeModel;
import org.zkoss.zul.TreeNode;
public class TreeModelReplaceMvvm {
private DefaultTreeModel<String> model;
private int k;
public DefaultTreeModel<String> getModel() {
return model;
}
public void setModel(DefaultTreeModel<String> model) {
this.model = model;
}
@Init
public void init() {
renewModel();
}
private void renewModel() {
DefaultTreeNode<String> root = new DefaultTreeNode<String>("root", new ArrayList<>());
model = new DefaultTreeModel<String>(root);
for (int i = 0; i < 20; i++) {
DefaultTreeNode<String> child = new DefaultTreeNode<String>("foo-"+k+i, new ArrayList<>());
root.add(child);
model.addOpenObject(child);
for (int j = 0; j < 10; j++) {
child.add(new DefaultTreeNode<String>("foo-"+k+i+j));
}
}
}
@Command
public void update() {
k++;
renewModel();
BindUtils.postNotifyChange(this, "model");
}
@Command
public void delete() {
k++;
renewModel();
TreeNode<String> root = model.getRoot();
root.remove(0);
BindUtils.postNotifyChange(this, "model");
}
}