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Right Click Context Menu Problem

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JDT
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JDT asked on 20 May 2010, 06:42 AM
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!

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Kiril Stanoev
Telerik team
answered on 20 May 2010, 08:27 AM
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
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answered on 20 May 2010, 04:53 PM
Worked great thanks.
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Tina Stancheva
Telerik team
answered on 20 May 2010, 05:36 PM
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
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answered on 21 May 2010, 06:45 PM
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
                } 
            } 
        } 

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Bobi
Telerik team
answered on 25 May 2010, 02:02 PM
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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Kiril Stanoev
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JDT
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Tina Stancheva
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Bobi
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