CODEWITHSUNDEEP
c#drag-and-dropwindows-runtime
Lars Düwel
Lars Düwel

Reputation: 127

Is there an Drag/Drop Cancelled Event in WinRT?

im looking for an Drag/Drop cancelled event in Metro, this means if the user drags an item and drops it outside of an droppable area.

how can i achieve this or is there any workaround?

Upvotes: 3

Views: 1093

Answers (2)

Bassem Wissa
Bassem Wissa

Reputation: 2976

Dude, instead of capturing pointer released on the whole page you can register "pointer capture lost" on the listview or the item that you drag, i believe it fires less times at least :D

 listView_PointerCaptureLost(object sender, PointerRoutedEventArgs e){
//do the logic you want;
}

Upvotes: 0

HCL
HCL

Reputation: 36785

I have not found such an event (for c#/XAML)! Perhaps (hopefully) an event will exists in the final release!

As a temporary workaround, I have registered to the Window.Current.CoreWindow.PointerReleased-event.
On drag start then, I set a boolean indicator to true, and if drag ends, the PointerReleased-event will be fired and I can test for the boolean indicator.

Workaround
In the constructor of the Page (or whatever element) register to PointerReleased:

Window.Current.CoreWindow.PointerReleased+=CoreWindow_PointerReleased;

The eventhandler could look somehow like this:

void CoreWindow_PointerReleased(CoreWindow sender, PointerEventArgs args) {
     if (m_isDragging) {
           m_isDragging = false;
           // Here you know that a drag-operation came to a end
     }
}

And the indicator you can set for example as follows; 

    private void Entries_DragStarting(object sender, DragItemsStartingEventArgs e){            
        m_isDragging = true;
        // ...
    }

Upvotes: 5

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