Expand Collapse containing window

[Xaria D]

I have a Rad Expander inside a RadPane.
I wish to expand or resize the width of the pane when the expander is expanded and likewise, reduce the width when expander is collapsed.
How to get the desired behavior?

[Xaria D]

Bump.

[Miroslav]

Hi Xaria D,

Is it a floating / undocked pane?

Then you can use this code:

static MainWindow()
{
    EventManager.RegisterClassHandler(typeof(RadPane),
        RadExpander.CollapsedEvent, new RoutedEventHandler(OnExpanderToggled));
    EventManager.RegisterClassHandler(typeof(RadPane),
        RadExpander.ExpandedEvent, new RoutedEventHandler(OnExpanderToggled));
}

private static void OnExpanderToggled(object sender, RoutedEventArgs e)
{
    var pane = sender as RadPane;
    var window = pane.GetVisualParent<ToolWindow>();

    if (window != null
        && (pane.IsFloating || pane.IsFloatingOnly))
    {
        window.ClearValue(Control.HeightProperty);
    }
}

Whenever an expander in the content is toggled, the height would size to the desired size of the content.

Regards,
Miroslav
the Telerik team