Hi, I'm new on 6.5 and I'd like testing MVVM in a simple example. So I created a little form for viewing a listbox. In this listbox I can only view data or delete only record one-by-one. When I delete a record how can I refresh (automatically?!?) the listbox?
Thanks
My simple form
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<window title="Gestione Utenti" border="normal" apply="org.zkoss.bind.BindComposer"
viewModel="@id('vm') @init('rvl.stcc.ui.aaa')" >
<caption>
<button label="Cancella" onClick="@command('delUtente')" />
</caption>
<listbox sizedByContent="true" span="true" autopaging="true" model="@load(vm.lstUtenti)" selectedItem="@bind(vm.selected)">
<listhead sizable="true">
<listheader label="index"/>
<listheader label="Utente" sort="auto(utente)"/>
</listhead>
<template name="model" var="Item" status="s">
<listitem>
<listcell label="@bind(s.index)"/>
<listcell label="@bind(Item.utente)" />
</listitem>
</template>
</listbox>
My simple class
public class aaa{
private List<Utenti> lstUtenti;
private Utenti selected;
@init
public void init()
{
System.out.println("init");
}
public List<Utenti> getlstUtenti()
{
UtentiDAO pdao = (UtentiDAO)SpringUtil.getBean("UtentiDAO");
lstUtenti=pdao.findAll();
System.out.println("getUtenti");
return lstUtenti;
}
@NotifyChange("selected")
public void setSelected(Utenti selected)
{
this.selected = selected;
}
public Utenti getSelected()
{
return selected;
}
@Command
@NotifyChange({"utenti","selected"})
public void delUtente() throws Exception
{
Messagebox.show("Confermi la cancellazione di "+selected.getUtente()+" ?","Confirm",Messagebox.YES | Messagebox.NO,Messagebox.QUESTION,
new EventListener<Event>()
{
@Override
public void onEvent(Event event) throws Exception
{
if (event.getName().equals("onYes"))
{
System.out.println("Cancellato");
UtentiDAO pdao = (UtentiDAO)SpringUtil.getBean("UtentiDAO");
pdao.delete(selected.getUtente());
selected=null;
getlstUtenti().remove(selected);
}
}
});
}
Yes you can You did some mistakes see this line of code
selected=null;
getlstUtenti().remove(selected);
When you already initialize selected=null; how can yoy remove this object from your main list? and rather than using NotifyChange you can use...
utenti.remove(selected);
selected = new HashSet<E>(); //E will be your object
BindUtils.postNotifyChange(null,null,this,utenti);
BindUtils.postNotifyChange(null,null,this,selected);
I think this code snippet will help you to overcome the issue.
This code works
private List<Utenti> lstUtenti;
private Utenti selected;
@Init
public void init()
{
UtentiDAO pdao = (UtentiDAO)SpringUtil.getBean("UtentiDAO");
lstUtenti=pdao.findAll();
System.out.println("init");
}
public List<Utenti> getlstUtenti()
{
return lstUtenti;
}
...
@Command
@NotifyChange({"lstUtenti","selected"})
public void delUtente() throws Exception
{
Messagebox.show("Confermi la cancellazione di "+selected.getUtente()+" ?","Confirm",Messagebox.YES | Messagebox.NO,Messagebox.QUESTION,
new EventListener<Event>()
{
@Override
public void onEvent(Event event) throws Exception
{
if (event.getName().equals("onYes"))
{
System.out.println("Cancellato");
UtentiDAO pdao = (UtentiDAO)SpringUtil.getBean("UtentiDAO");
pdao.delete(selected.getUtente());
lstUtenti.remove(lstUtenti.indexOf(selected));
BindUtils.postNotifyChange(null,null,aaa.this,"lstUtenti");
selected=null;
}
}
});
}
I hope it can help someone Luca
The problem is easaliy solved.. your NotifyChange is wrong. You changed another field in your model, which is not listed there.. Try this:
@NotifyChange({"utenti","selected", "lstUtenti"})
I know, your list is not a "real" member, but it has been changed anyway. So you have to notify the controller of the change and he will redraw the list.
Asked: 2013-01-30 17:34:00 +0800
Seen: 86 times
Last updated: Jan 31 '13