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Drag from ListView to Panorama

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jesse
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jesse asked on 25 Jul 2015, 02:07 PM
I would like to Drag an item from a RadListView into a Panorama, which in turn would create a new tile based on some data from the dragged Item, can someone point me to documentation or code that does something like this?

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Stefan
Telerik team
answered on 27 Jul 2015, 07:41 AM
Hi Jessie,

Thank you for writing.

For the purpose, you should use the DragDropService of RadListView. Here is a small example to get you started:
private void DragDropService_PreviewDragDrop2(object sender, RadDropEventArgs e)
{
    if (radPanorama1.ShowGroups)
    {
        TileGroupElement hoveredGroup = radPanorama1.ElementTree.GetElementAtPoint(e.DropLocation) as TileGroupElement;
        if (hoveredGroup != null)
        {
            RadTileElement newTile = new RadTileElement();
            newTile.Text = ((SimpleListViewVisualItem)e.DragInstance).Data.Text;
            hoveredGroup.Items.Add(newTile);
            //newTile.row
            //newTile.Column
            //newTile.RowSpan
            //newTile.ColSpan
        }
 
        RadTileElement hoveredTile = radPanorama1.ElementTree.GetElementAtPoint(radPanorama1.PointToScreen(e.DropLocation)) as RadTileElement;
        if (hoveredTile != null)
        {
            TileGroupElement tileGroup = hoveredTile.FindAncestor<TileGroupElement>();
            if (tileGroup != null)
            {
                RadTileElement newTile = new RadTileElement();
                newTile.Text = ((SimpleListViewVisualItem)e.DragInstance).Data.Text;
                tileGroup.Items.Add(newTile);
            }
        }
 
        RadPanoramaElement hoveredControl = radPanorama1.ElementTree.GetElementAtPoint(radPanorama1.PointToScreen(e.DropLocation)) as RadPanoramaElement;
        if (hoveredControl != null)
        {
            RadTileElement newTile = new RadTileElement();
            newTile.Text = ((SimpleListViewVisualItem)e.DragInstance).Data.Text;
            hoveredControl.Items.Add(newTile);
        }
    }
    else
    {
        RadTileElement newTile = new RadTileElement();
        newTile.Text = ((SimpleListViewVisualItem)e.DragInstance).Data.Text;
        radPanorama1.Items.Add(newTile);
    }
}

I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.

Regards,
Stefan
Telerik
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jesse
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answered on 27 Jul 2015, 05:28 PM
Thank you, this was most helpful.  The only issue i have now is that when there are several tiles in a group, moving them is *very* slow.  Is there a way to improve that by maybe turning off the animation?
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Stefan
Telerik team
answered on 28 Jul 2015, 05:53 AM
Hello Jesse,

I am unable to replicate slow down with the tiles in the panorama. Attached you can find the project I've tested with. Can you have a look at it and let me know if I am missing something?

I am looking forward to your reply.

Regards,
Stefan
Telerik
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