private void OnDragOver(object sender, Telerik.Windows.DragDrop.DragEventArgs e)
{
TreeViewDragDropOptions options = DragDropPayloadManager.GetDataFromObject(e.Data, TreeViewDragDropOptions.Key) as TreeViewDragDropOptions;
if (options == null)
{
e.Effects = DragDropEffects.None;
e.Handled = true;
return;
}
var draggedItem = options.DraggedItems.FirstOrDefault();
var itemsType = (this.AssociatedObject.ItemsSource as IList).AsQueryable().ElementType;
if (draggedItem.GetType() != itemsType)
{
e.Effects = DragDropEffects.None;
}
else
{
(options.DragVisual as TreeViewDragVisual).IsDropPossible = true;
options.DropAction = DropAction.Move;
options.UpdateDragVisual();
}
e.Handled = true;
}
private void OnDrop(object sender, Telerik.Windows.DragDrop.DragEventArgs e)
{
TreeViewDragDropOptions options = DragDropPayloadManager.GetDataFromObject(e.Data, TreeViewDragDropOptions.Key) as TreeViewDragDropOptions;
if (options == null)
{
return;
}
var draggedItem = options.DraggedItems.Cast <ProductViewModel>().ToList();
if (draggedItem == null)
{
return;
}
if (e.Effects != DragDropEffects.None)
{
var collection = (sender as System.Windows.Controls.ListBox).ItemsSource as IList;
foreach (var s in draggedItem)
{
collection.Add(s);
}
}
e.Handled = true;
}
private static Group GetDropGroup(TreeViewDragDropOptions options)
{
Group result = null;
if (options != null && options.DropTargetItem != null)
{
result = options.DropTargetItem.Item as Group;
}
return result;
}
private void OnDrop(object sender, Telerik.Windows.DragDrop.DragEventArgs e)
{
TreeViewDragDropOptions options = DragDropPayloadManager.GetDataFromObject(e.Data, TreeViewDragDropOptions.Key) as TreeViewDragDropOptions;
if (options == null)
{
return;
}
var draggedItem = options.DraggedItems.FirstOrDefault();
if (draggedItem == null)
{
return;
}
if (e.Effects != DragDropEffects.None)
{
var collection = (sender as System.Windows.Controls.ListBox).ItemsSource as IList;
collection.Add(draggedItem);
}
e.Handled = true;
}
