Right Click Context Menu Problem

[JDT]

Hi Telerik, appreciate the help as always. Here's the problem. When I right click a node (it doesn't get selected, it should, but since it doesn't I can't use the selecteditem property of the tree). I therefore use the method in the documentation.

 RadMenuItem menuItem = ((RadRoutedEventArgs)e).OriginalSource as RadMenuItem;
 RadTreeViewItem riParent = FindParentOfType<RadTreeViewItem>(menuItem);

private static T FindParentOfType<T>(UIElement element) where T : UIElement
        {
            if (element == null)
                return null;
            DependencyObject parent =
                Telerik.Windows.RoutedEvent.GetLogicalParent(element) ??
                VisualTreeHelper.GetParent(element);
            while ((parent != null) && !(parent is T))
            {
                parent =
                    Telerik.Windows.RoutedEvent.GetLogicalParent(parent) ??
                    VisualTreeHelper.GetParent(parent);
            }
            return (T)parent;
        }

The FindParentOfType<T> method ALWAYS returns null. I can't get it to return the object that was right clicked. Any suggestions? I would prefer that the right click just selected the node. If there isn't a straightforward way could I trap the right click button down/up events to achieve this?

Thanks!

[Kiril Stanoev]

Hi Jerry,

RadContextMenu has a really useful method called GetClickedElement<T>() that returns the item that is being clicked.

private void ContextMenuOpened(object sender, RoutedEventArgs e)
{
    RadContextMenu menu = sender as RadContextMenu;
    if(menu != null)
    {
        RadTreeViewItem clickedItem = menu.GetClickedElement<RadTreeViewItem>();
        if(clickedItem != null)
        {
            clickedItem.IsSelected = true;
        }
    }
}

I've attached a sample project demonstrating this functionality. Give it a try and let me know how it works for you.

All the best,
Kiril Stanoev
the Telerik team

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[JDT]

Worked great thanks.

[Tina Stancheva]

Hi JDT,

We are glad we were able to help.

Please let us know if we can further assist you.

Kind regards,
Tina Stancheva
the Telerik team

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[JDT]

Here's a quick code snippet of what I had to do to get right click and multiselect to play nice. In case anyone needs it.

ObservableCollection<RadTreeViewItem> lastItemsClicked = new ObservableCollection<RadTreeViewItem>();

void contextMenuFolder_Opened(object sender, RoutedEventArgs e)
        {
            RadContextMenu rcm = sender as RadContextMenu;
            if (rcm != null)
            {
                RadTreeViewItem clickedItem = rcm.GetClickedElement<RadTreeViewItem>();
                if (clickedItem != null)
                {
                    if (!lastItemsClicked.Contains(clickedItem))
                    {
                        foreach (RadTreeViewItem ris in lastItemsClicked)
                            ris.IsSelected = false;
                        lastItemsClicked.Clear();
                    }

                    clickedItem.IsSelected = true;
                }
            }
        }

[Bobi]

Hi JDT,

Thank you very much for the helpfull example.
Any suggestion and feedback is highly appreciated.

Best wishes,
Bobi
the Telerik team

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