ZK6: How to getr context in the ViewModel

answered 2011-12-09 10:30:13 +0800

dennis
3679 ● 1 ● 6
http://www.javaworld.com....

updated 2011-12-21 05:04:17 +0800

I post a feature here, http://tracker.zkoss.org/browse/ZK-667
Currently, annotate @Init on a method of viewmodel with one parameter which type is BindContext

@Init
public void myinit(BindContext ctx){
..
}

it is the correct time to get value from Executions.getCurrent()

===
Supports after 12/21

@BindingParam (same as @Param, @Param was deprecated) to get binding arg
@ExecutionParam to get current execution attribute
@ExecutionArgParam to get current execution arg attribute
@ScopeParam to get attribute from scopes
@ContextParam to get special context object (ex, execution, desktop, session...)
@SelectorParam to get components by selector.

can use @*Param both in @Init and @Command, for example
@Init
public void myinit(@ExecutionArgParam("mode") String mode){
..
}

answered 2011-12-15 12:11:15 +0800

avidD
166 ● 2

Hi,
I am also currently struggling with passing arguments between composers. I used put them into the args using Exceutions.createComponents(String, Component, Map). As I understand, the execution pushes the arg map into a list which it must be popped from lateron. Sometime ZK takes care about popping it, sometimes not. Now what I need to do is
I have a form in which I can edit resources that are displayed in a tree. When the user clicks save / apply I want to update the view of the resource in the tree. Therefore, I must tell the view model which tree item(s) to update when the data was successfully updated. The form displaying the resource is opened by clicking on a tree item. In the listener I push the arguments into the execution:

Executions.getCurrent().pushArg(
        new ScreenModel.Args()
            .selectedItems(item.getTree().getSelectedItems())
            .getArgMap());

mRootComponent = 
      Executions.createComponents(content.getSubscreen().getZul(), mWest, null);

Regards,
David