Inconsistent Behavior with afterCompose + template in zul + data binding

asked 2010-02-09 11:43:07 +0800

fmcypriano
612 ● 1 ● 7
http://felipecypriano.com...

updated 2010-02-09 11:44:30 +0800

Hello all,

This thread is about an inconsistence of behavior when using the same code in doAfterCompose() and on any event - like onClick. It's not a problem without "solution", but it's a problem to find out when it's causing "bugs".

I want to show a grid and have this grid populated when the page opens. This is the grid's code:

<button id="btnLoadData" label="Load data"/>
<grid id="grid">
    <columns>
        <column label="Foo"/>
        <column label="Bar"/>
    </columns>
    <rows>
        <row self="@{each=obj}" value="@{obj}">
            <label value="@{obj.foo}"/>
            <label value="@{obj.bar}"/>
        </row>
    </rows>
</grid>

On the composer I'll load the data:

public void loadGridData() {
    List<MyObj> objList = myService.getAllObjs();
    grid.setModel(new ListModelList(objList));
}

public void onClick$btnLoadData(){
    loadGridData();
}

This code works as expected. But what if I want to load the grid without clicking the button, the first idea is to use doAfterCompose method, so lets create it:

public void doAfterCompose(Component comp) {
    super.doAfterCompose(comp);
    loadGridData();
}

Now, when the page is loaded the grid shows a list of obj.toString(), ignoring the template configured in the zul page. Zk apparently changes the template to something like this:

<!-- other tags aren't changed -->
<row self="@{each=obj}">
    <label value="@{obj}"/>
</row>

This it the inconsistence behavior: setModel works as expected when called from events, but it mess up the template when called from doAfterCompose. Is this a design decision? I think it should be "fixed", what do you think?

P.S.: If you need more explanation on this, please let me know. I try to keep this first as small as possible.

P.S 2: I'm using ZK 3.6.3

Regards,