I drag a item to a control to create an object ,when drag over it,it should display an allowed dragVisual,when drag over another control is should display an Forbidden dragVisual ,the two DragVisual is create by different Template
it seems AddGiveFeedbackHandler is useful, in OnGiveFeedback can change the DragVisual when the target control is Allow, but I do not know how to get the target control
how to resolve this
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Hello Rui,
To get the drop target control you can use the OriginalSource property of the event arguments of the drag/drop event which you are using. Note that the property might return a child element instead of the logical element defined in XAML. In this case you can use the ParentOfType<T>() extension method to get the element subscribed to the drag/drop events.
You can also check the Set Drag Visual article. Basically, you can define a DragVisual only on start of the drag operation. However, further in the drag/drop you can update the DragVisual element. I prepared a basic example that shows a sample implementation.
I hope that helps.
Regards,
Martin Ivanov
Progress Telerik
To get the drop target control you can use the OriginalSource property of the event arguments of the drag/drop event which you are using. Note that the property might return a child element instead of the logical element defined in XAML. In this case you can use the ParentOfType<T>() extension method to get the element subscribed to the drag/drop events.
You can also check the Set Drag Visual article. Basically, you can define a DragVisual only on start of the drag operation. However, further in the drag/drop you can update the DragVisual element. I prepared a basic example that shows a sample implementation.
I hope that helps.
Regards,
Martin Ivanov
Progress Telerik
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answered on 27 Dec 2017, 08:30 AM
Thank you very much
Inspired by your demo,I find a solution set dragvisual as a global property when init the drag, and listen to the allowed target control 's dragover and dragleave event, then change the template of the dragvisual
it is not a perfect design, but soled my issue
Inspired by your demo,I find a solution set dragvisual as a global property when init the drag, and listen to the allowed target control 's dragover and dragleave event, then change the template of the dragvisual
it is not a perfect design, but soled my issue