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1830
EventTrigger for Contentpane Closing
posted

I'm using MVVM and I need to be able to cancel contentpane close events in a viewmodel class.  Originally I thought to use a HeaderTemplate with my own close button, but there are a few scenarios where the stock close button will still show up in a floating window, even if you turn it off with CloseButtonVisibility, and I don't want to re-template any of the DockManager controls.  The goal is to handle the closing event for all panes in the viewmodel.  Therefore, I'm wondering if I can set up an interaction trigger to invoke a command action for the contentpane's closing event.

Does anyone know how to do this? Any other ideas for a complete MVVM-style contentpane close architecture are also welcome.  Thanks.

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  • 1830
    Offline posted

    There are a few areas of basic infrastructure (i.e. closing) that appear to not lend themselves to an MVVM apporach apart from re-templating (a daunting thought given the complexity of this massive control).  However, I believe I have a decent enough workaround.  I'm using Brian Lagunas' attached behavior, and I added the following line of code to the PrepareContainerForItem method:

    container.Closing += (s, e) => e.Cancel = !(item as ViewModel).Close();

    which provides an adapter of sorts to map ContentPane.Closing events into the viewmodel plumbing.

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