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Hi guys,
Firstly I'd like to say that we appreciate all the work that has been contributed to zk.
Hopefully this is a simple problem that is easy to fix if I am pointed in the right direction. I have the following semi working code:
in my GenericForwardComposer
public List<ListItem> getMyListItems() {
return myListItems;
}
in my zul page:
<listbox model="@{mainCtrl.myListItems}">
<listitem self="@{each=myListItem}">
<listcell>
<checkbox label="@{myListItem.name}" />
</listcell>
</listitem>
</listbox>
This is giving me some checkboxes dynamically generated using a list taken from a getter in the GenericForwardComposer, but I don't want to use listbox. I tried the following, but it doesn't work
<zk forEach="@{mainCtrl.myListItems}">
<checkbox label="@{each.name}" />
</zk>
I don't really understand the difference between @{} and ${} as well and it is hard to look up (since they are just symbols)
All help appreciated
thanks,
-Matt
>> I don't really understand the difference between @{} and ${} as well and it is hard to look up (since they are just symbols)
There is a big difference:
${} is JSP-stuff, and is designed as "renderhelp". It's only evaluted during the firsttime rendering. EL is a little bit more flexible, you could use i.e. conditions.
The main advantage: You could EL's for the forEach-Attribute and if-Attribute.
Note: forEach and if are also "renderhelpers" - it is only for the first time build of the GUI
@{} is two-way-binding - you could not use @{} for the attributes forEach and if
the main advantage: 2-way-binding, you can perform extra load and save
For your example:
modeldata: myListItems
${}: you get the checkboxes from the model while the GUI is rendered the first time, if there a change in the model (myListItems) - nothing happens
@{} (with listbox): the same as ${}, but could fire reload the UI via databinder, after the modelchange you could refresh the model with binder.loadXXX or
listbox model="@{mainCtrl.myListItems, load-after=....}">
The problem is, that not all components offer an model - so @databinding is not possible for all GUI-Constructs (i.e. checkboxes without Listbox or Row).
Of course you could try to mix ${} and @{}, but ${} is not reloadable....
Check also this thread.
/Robert
And next time in the help section please.
Asked: 2010-01-11 11:40:21 +0800
Seen: 991 times
Last updated: Jan 12 '10
