Change data in Combobox and setSelectedItem throws exception

answered 2012-08-22 12:47:02 +0800

tisaksen
46 ● 6

Yes I am using BindComposer

answered 2012-08-22 18:11:27 +0800

tisaksen
46 ● 6

Here is demo code. the ZK version used is 6.01.

To reproduce problem, load demo.zul and select and item, then click on "Change entries!" and you will see the exception.
If you reload the page, then just click "Change entries!" without doing a selection first, then it works as expected (2 new items in combobox instead of original data)

demo.zul:

<?xml version="1.0" encoding="UTF-8"?>
<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" ?>
<zk xmlns="http://www.zkoss.org/2005/zul"
xmlns:h="http://www.w3.org/1999/xhtml"
>
<div id="theGrid"
apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('no.toyota.etmadmin.etmadminWeb.DemoViewModel')"
>

<combobox readonly="true" model="@bind(vm.demoList)" selectedItem="@bind(vm.selectedItem)">
<template name="model" var="s">
<comboitem label="@load(s)"/>
</template>
</combobox>
<button onClick="@command('changeEntries')" label="Change entries!"/>
</div>
</zk>

DemoViewModel.java:

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package no.toyota.etmadmin.etmadminWeb;

import java.util.Arrays;
import java.util.List;
import org.apache.log4j.Logger;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.Init;
import org.zkoss.bind.annotation.NotifyChange;

/**
*
* @author tisaksen
*/
public class DemoViewModel
{
private Logger log = Logger.getLogger(DemoViewModel.class);

private List<String> demoList;
private String selectedItem;


public DemoViewModel()
{

}

@Init
public void init() {
setDemoList(getAllDemos());
}

public void setDemoList(List<String> demoList) {
this.demoList = demoList;
}

public List<String> getDemoList() {
return demoList;
}

public List<String> getAllDemos() {
return Arrays.asList("A","B","C","D","E","F","G");
}

public String getSelectedItem() {
return selectedItem;
}

public void setSelectedItem(String selectedItem) {
this.selectedItem = selectedItem;
}

@Command
@NotifyChange("demoList")
public void changeEntries()
{
setDemoList(Arrays.asList("Foo","Bar"));
}
}

answered 2012-08-23 07:19:16 +0800

tisaksen
46 ● 6

I found the problem, I tried to instansiate an instance from zkplus AnnotateBinderInit. Line 2 in demo.zul.

This created an instance from 5.x zplus package when I should be using 6.x org.zkoss.bind stuff, so I simply removed line 2 and it all works as expected.
Easy fix, hard to find ;)

Now I'm having another problem setting the selected item gives me out of bounds exception but at least I'm on step further.

answered 2012-08-27 07:34:10 +0800

tisaksen
46 ● 6

sjoshi, thank you very much for your help.
It was a jar issue indeed! I had just upgraded from 5.x to 6.0.2 when I discovered the error. Now I have cleaned up jar files and everything is working just fine :-) Joy!