//private void lstSprites_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
//{
// // Store the mouse position
// dragDropPoint = e.GetPosition(null);
//}
//private void lstSprites_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
//{
// Point pos = e.GetPosition(null);
// Vector diff = dragDropPoint - pos;
// if (e.LeftButton == MouseButtonState.Pressed &&
// ( Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance ||
// Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance))
// {
// // Get dragged item
// System.Windows.Controls.ListView listView = sender as System.Windows.Controls.ListView;
// var listViewItem =
// FindAnchestor<System.Windows.Controls.ListViewItem>((DependencyObject)e.OriginalSource);
// // Find the data behind the ListViewItem
// SpriteObject sprite = listView.ItemContainerGenerator.ItemFromContainer(listViewItem) as SpriteObject;
// // Initialize the drag & drop operation
// System.Windows.DataObject dragData = new System.Windows.DataObject("SpriteObject", sprite );
// DragDrop.DoDragDrop(listViewItem, dragData, System.Windows.DragDropEffects.Move);
// }
//}
//private static T FindAnchestor<T>(DependencyObject current)
// where T : DependencyObject
//{
// do
// {
// if (current is T)
// {
// return (T)current;
// }
// current = VisualTreeHelper.GetParent(current);
// }
// while (current != null);
// return null;
//}
void dragMgr_ProcessDrop(object sender, ProcessDropEventArgs <IGameObject> e)
{
// This shows how to customize the behavior of a drop.
// Here we perform a swap, instead of just moving the dropped item.
int higherIdx = Math.Max(e.OldIndex, e.NewIndex);
int lowerIdx = Math.Min(e.OldIndex, e.NewIndex);
if (lowerIdx < 0)
{
Debug.WriteLine("=> item = {0} {1}", lowerIdx, sender.GetType().Name);
// The item came from the lower ListView
// so just insert it.
//e.ItemsSource.Insert(higherIdx, e.DataItem);
}
else
{
// null values will cause an error when calling Move.
// It looks like a bug in ObservableCollection to me.
if (e.ItemsSource[lowerIdx] == null ||
e.ItemsSource[higherIdx] == null)
{
return;
}
// The item came from the ListView into which
// it was dropped, so swap it with the item
// at the target index.
e.ItemsSource.Move(lowerIdx, higherIdx);
e.ItemsSource.Move(higherIdx - 1, lowerIdx);
}
// Set this to 'Move' so that the OnListViewDrop knows to
// remove the item from the other ListView.
e.Effects = System.Windows.DragDropEffects.Move;
ThisLevel.RemoveSpritesFrom(MainGFX);
ThisLevel.AddSpritesTo(MainGFX);
}