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Touch Drag and Drop between Two Grid Views

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GridView
This is a migrated thread and some comments may be shown as answers.
Mansi A.
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Mansi A. asked on 13 May 2015, 03:30 PM

Hello, 

 

    I have two Grid Views with drag and drop behavior. working perfect. 

     Gesture is enabled on both.

     However, When I try to use Touch (on Tablet)  to drag row from Grid1 to Grid2 is not working, What am I missing ? 

     

Thank You

Mansi Mansi 

 

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Dess | Tech Support Engineer, Principal
Telerik team
answered on 18 May 2015, 12:16 PM
Hello Mansi,

Thank you for writing.

RadGridView drag and drop functionality should be handled differently when using gestures. You can override the RadGridView.OnPanGesture method and start the service when necessary. You can refer to our Extending RadGridView to Enable Row Drag and Drop Functionality blog post which is quite useful on this topic. As to the gestures support, you should start the RadDragDropService as follows:
public class DragAndDropRadGrid : RadGridView
{
protected override void OnPanGesture(PanGestureEventArgs args)
{
    base.OnPanGesture(args);
    GridCellElement cell = this.GridViewElement.ElementTree.GetElementAtPoint(args.Location) as GridCellElement;
    RadDragDropService dragDropService = this.GridViewElement.GetService<RadDragDropService>();
   
    if (args.IsBegin)
    {
        dragDropService.BeginDrag(this.ElementTree.Control.PointToScreen(args.Location),cell);
        
    }
 
    if (dragDropService.State == RadServiceState.Working)
    {
        dragDropService.DoMouseMove(this.ElementTree.Control.PointToScreen(args.Location));
    }
 
    if (args.IsEnd)
    {
        dragDropService.EndDrag();
    }
 
    args.Handled = true;
}
 //drag and drop implementation
}

It would necessary to modify the service events a little bit as the DragInstance is actually the cell, not the row element.

I hope this information helps. Should you have further questions, I would be glad to help.
 
Regards,
Dess
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GridView
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Mansi A.
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Answers by
Dess | Tech Support Engineer, Principal
Telerik team
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