Can we change the drag/drop tooltip when e.QueryResult = true

[James]

Hi,

Im trying to change the drag/drop tooltip and I followed this post: http://www.telerik.com/help/silverlight/radtreeview-how-to-set-drag-cue-feedback-deny-drop.html

Our scenario is allow client to drop item before/after another item but we need to change the tooltip message, so my code is:private void OnDropQuery( object sender, DragDropQueryEventArgs e )
{
    var destination = e.Options.Destination as RadTreeViewItem;
    var cue = e.Options.DragCue as TreeViewDragCue;
    // Do not allow dropping inside items which start with "B", only handle cases
    // where a drop is currently allowed.
    if ( destination != null
        && e.Options.Status == DragStatus.DropDestinationQuery
        && e.QueryResult == true
        && destination.DropPosition == DropPosition.Before
        && ( destination.Item as MyViewModel ).Title.StartsWith( "B" ) )
    {
        // Debying a drop will set the cue.IsDropPossible = false
        e.QueryResult = true;
        // We only need to give a reason:
        cue.DragActionContent = "Can drop before Bs, hahaha";
    }
}

Howevere, it never worked when e.QueryResult = true.  Could you guys help me with this one, please?  Doe it work in your end or there is something at my end is wrong?


Regards

Bill

[Petar Mladenov]

Hi James,

 When setting e.QueryResult = true in Drop Query then you need to use the DropInfo event with DragStatus = DropPossible in order to set the DragActionContent:

// OnDropInfo event handler
        private void OnDropInfo(object sender, DragDropEventArgs e)
        {
            if (e.Options.Status == DragStatus.DropPossible)
            {
                (e.Options.DragCue as TreeViewDragCue).DragActionContent = "POSSIBLE DROP ";
            }
        }

You can find this realized in the attached example. Please give it a try and let us know if it satisfies you.

Kind regards,
Petar Mladenov
the Telerik team

[James]

Thanks Petar!  Our issue is resolved.

One more question: I found that we can only update the prefix of the tooltip message. For example,  in "drop before aaa", only the "drop before" can be updated, the header of the treeview item will always get into the tooltip.  Is there any way to change the whole tooltip message?


Regards

Bill

[Petar Mladenov]

Hello James,

 Yes, this is possible. Please check out the following code and its comments:

// OnDropInfo event handler
        private void OnDropInfo(object sender, DragDropEventArgs e)
        {
            if (e.Options.Status == DragStatus.DropPossible)
            {
                (e.Options.DragCue as TreeViewDragCue).DragActionContent = "ACTION :";

                //// DragTooltipContent properties are responsible to represent the second part of the informative text in the drag cue.
                //// The object placed in the content will be show using the template.
                //// The template should be set to null or other template. By default it is the same as the header template of the item.
                (e.Options.DragCue as TreeViewDragCue).DragTooltipContentTemplate = null;
                (e.Options.DragCue as TreeViewDragCue).DragTooltipContent = ": CONTENT";
            }
        }

All the best,
Petar Mladenov
the Telerik team

[Miroslav]

I am wondering can we remove the tooltip template  with the arrow and replace it with our custom template.And remove the cue.ItemTemplate.The desired effect is in the attached picture.

[Petar Mladenov]

Hi Miroslav,

 The attached example shows how you can define a custom DracCueTemplate. Please let us know if this helps you or not.

Regards,
Petar Mladenov
the Telerik team