ZK Developer's Reference/MVVM/Syntax/Data Binding/@command

This article is out of date, please refer to zk-mvvm-book/8.0/syntax/data_binding/command for more up to date information.

Syntax

@command( [EL-expression], [arbitraryKey]=[EL-expression] )

Description

Target Attribute: event attributes (e.g. onClick, onOK)

Purpose: Specify which command to execute when the event fires

You can pass arbitrary arguments in key-value pairs with comma separated.

[arbitraryKey]=[EL-expression]

It's key-value pairs basically. You can write multiple key-value pairs with different key names.

An EL expression without key is set to a default key named "value" implicitly.

Due to each annotation has different functions, some annotations may ignore key-value pair expression other than default key, e.g.@id.

[arbitraryKey]

It could be any name, it's used as a key for parameter related Java annotation in a ViewModel.

Example

<button label="Save" onClick="@command('saveOrder')" />

<button label="Delete" onClick="@command(empty vm.selected.id?'deleteOrder':'confirmDelete')" />

<button label="Index" onClick="@command('showIndex', index=10, keyword='myKeyword')"/>

Version History

Version	Date	Content
6.0.0	February 2012	The MVVM was introduced.