AllowDrop not working as expected?

[Wetzorke]

Hello,

in our project, we have multiple RadPanes in a RadDocking control.
One of those RadPanes should not be draggable and the user is not allowed to drop other panes on this one.
Setting the IsDragDisabled property to true doesn't seem to change the behaviour, only in combination with PaneHeaderVisibility = Visibility.Collapsed.
But setting CanFloat to true results in the desired behaviour.

However, I cannot get the second part (about not allowing to drop other panes on this one) working.
I tried using the AllowDrop property, but setting it to true or false doesn't seem to make any difference.
Is there anything else to consider when using the AllowDrop property?

As a workaround, I tried using the PreviewDrop event of the docking control and the RadPaneGroup but neither seem to fire when a RadPane is dropped. I only get the PaneStateChanged event but as far as I know, this one does not contain any information on the drop target.

Any help would be appreciated.

Best regards.

[Martin Ivanov]

Hello Bernd,

I will check your case and get back to you with more information on the matter.

Regards,
Martin Ivanov
Progress Telerik

[Martin Ivanov]

Hello Bernd,

To achieve your requirement and disallow drop on specific position you can use the PreviewShowCompass event of RadDocking. Basically, if the pane under the mouse forbids drop you can set the event arguments' Canceled property to True. You can find this approach shown in the attached project. I hope it helps.

Regards,
Martin Ivanov
Progress Telerik

[Wetzorke]

Hello Martin,

 

thanks for your reply and the attached project. That was very helpful.

I altered your approach with the PreviewShowCompass event slightly, so that I don't need to include the MouseUtilities class.

Here is what I changed as it might be helpful to someone else

private void Docking_PreviewShowCompass(object sender, Telerik.Windows.Controls.Docking.PreviewShowCompassEventArgs e)
{
    if (e.TargetGroup != null && e.TargetGroup == paneGroup)
    {
        e.Canceled = true;
    }
}

 

Thanks again and best regards.