private async void OnPlayItemsListViewDrop(object sender, DragEventArgs e)
{
IEnumerable <MusicPlaybackItem> addItems = null;
if (e.DataView.Contains(StandardDataFormats.StorageItems))
{
var items = await e.DataView.GetStorageItemsAsync();
addItems = await FileOpen.GetPlaybackItemsFromFilesAsync(
await FileOpen.GetAllFiles(items));
}
else if (e.DataView.Contains(StandardDataFormats.Text))
{
var items = DragHelper.Get(await e.DataView.GetTextAsync());
if (items is Playlist)
{
var list = items as Playlist;
addItems =
from i
in list.Items
select MusicPlaybackItem.CreateFromMediaFile(i.ToMediaFile());
}
else if (items is PlaylistItem)
{
addItems = new MusicPlaybackItem[]
{
MusicPlaybackItem.CreateFromMediaFile(
(items as PlaylistItem).ToMediaFile())
};
}
else if (items is IEnumerable <DbMediaFile> )
{
addItems =
from i
in items as IEnumerable <DbMediaFile>
select MusicPlaybackItem.CreateFromMediaFile(i);
}
else if (items is DbMediaFile)
{
addItems = new MusicPlaybackItem[]
{
MusicPlaybackItem.CreateFromMediaFile(items as DbMediaFile)
};
}
}
if (addItems != null)
{
var targetListView = sender as ListView;
if (targetListView == null)
{
return;
}
targetListView.Background = null;
Border border = VisualTreeHelper.GetChild(targetListView, 0) as Border;
ScrollViewer scrollViewer = border.Child as ScrollViewer;
var droppedPosition = e.GetPosition(targetListView).Y + scrollViewer.VerticalOffset;
var itemsSource = targetListView.ItemsSource as IList;
var highWaterMark = 3d; // 3px of padding
var dropIndex = 0;
var foundDropLocation = false;
for (int i = 0; i < itemsSource.Count && !foundDropLocation; i++)
{
var itemContainer = (ListViewItem)targetListView.ContainerFromIndex(i);
if (itemContainer != null)
{
highWaterMark = highWaterMark + itemContainer.ActualHeight;
}
if (droppedPosition <= highWaterMark)
{
dropIndex = i;
foundDropLocation = true;
}
}
if (foundDropLocation)
{
await Core.PlaybackControl.Instance.AddFile(addItems, dropIndex);
}
else
{
await Core.PlaybackControl.Instance.AddFile(addItems);
}
}
}