Remove RadDocumentPane from PRISM region when closed

[Marcel]

Hello,

I am trying to remove a RadDocumentPane from a region when its closed, but I cant find a way to catch the close event in my viewmodel?

Whats the best approach to accomplished this with the Docking control?

 

Marcel

 

[Vladi]

Hello Marcel,

When a RadPane/RadDocumentPane instance is closed via its "Close" button the Close event of the RadDocking control is raised. In that event you can get the closed instances from the event args Pane collection. When working in a more MVVM scenarios you could use our EventToCommandBehavior in order to bring the Close event handler to the ViewModel. The next code snippet shows how the EventToCommandBehavior could be used in the RadDocking control.

the ViewModel's code should include something like this:

public class ViewModel
{
    public ICommand CustomCommand { get; set; }

    public ViewModel()
    {
        this.CustomCommand = new DelegateCommand(OnCustomCommandExecuted);
    }

    private void OnCustomCommandExecuted(object obj)
    {
        var args = obj as Telerik.Windows.Controls.Docking.StateChangeEventArgs;
        var closedPanes = args.Panes.ToList();
        foreach (var pane in closedPanes)
        {
            MessageBox.Show(string.Format("{0} pane closed", pane.Header));

            // Add your custom logic that removes the instance from the region here.
        }
    }
}

and the the XAML code:

<Window ...
        xmlns:local="clr-namespace:DockingClosedEvent"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
         ...>
    <Window.DataContext>
        <local:ViewModel/>
    </Window.DataContext>
    <Grid>
        <telerik:RadDocking>
            <telerik:EventToCommandBehavior.EventBindings>
                <telerik:EventBinding Command="{Binding CustomCommand}"
                                      EventName="Close"
                                      PassEventArgsToCommand="True"/>
            </telerik:EventToCommandBehavior.EventBindings>
             ...
        </telerik:RadDocking>
    </Grid>
</Window>

Hope this is helpful.

Regards,
Vladi
Telerik