private void listView_Drop(object sender, DragEventArgs e)
{
bool isListViewEx = e.Data.GetDataPresent(typeof(ListViewEx <VMSong>));
if (!isListViewEx)
{
return;
}
List <string> itemsToMove = new List <string>();
ListViewEx <VMSong> source = e.Data.GetData(typeof(ListViewEx <VMSong>)) as ListViewEx <VMSong>;
int index = listView.CurrentIndex;//GetCurrentIndex(e.GetPosition);
/*
* if(index >= Items.Count)
* {
* throw new Exception("Index should be valid with the range");
* }
*/
// index = listView.GetCurrentIndex(e.GetPosition);
listView.SelectedItems.Clear();
listView._selItems.Clear();
foreach (VMSong s in source._selItems)
{
itemsToMove.Add(s.Filepath);
}
listView.AddDataFromFiles(index, itemsToMove);
}
private void BeingMultiDrag(MouseEventArgs e)
{
ListViewEx <T> listView = this;
ListViewItem listViewItem =
FindAnchestor <ListViewItem>((DependencyObject)e.OriginalSource);
if (listViewItem == null)
{
return;
}
//the listviewitem can be selected on drag before the cache has updated.
//In this case, add the item to _selitems
//when dragging between listviews, we use _selitems to get the selected items
if (!_selItems.Contains((T)listViewItem.DataContext))
{
_selItems.Clear(); //make this item the only selected item
_selItems.Add((T)listViewItem.DataContext);
}
RestoreCacheSelectedItems();
SortCachedSelectedItems();
//setup the drag adorner.
InitialiseAdorner(listViewItem);
//add handles to update the adorner.
listView.PreviewDragOver += ListViewDragOver;
listView.DragLeave += ListViewDragLeave;
listView.DragEnter += ListViewDragEnter;
DataObject data = new DataObject(typeof(ListViewEx <T>), this);
DragDropEffects de = DragDrop.DoDragDrop(this, data, DragDropEffects.Move);
_selItems.Clear();
//cleanup
listView.PreviewDragOver -= ListViewDragOver;
listView.DragLeave -= ListViewDragLeave;
listView.DragEnter -= ListViewDragEnter;
if (_adorner != null)
{
AdornerLayer.GetAdornerLayer(listView).Remove(_adorner);
_adorner = null;
}
}
private void HandleDragDrop(DragEventArgs e)
{
bool isListViewEx = e.Data.GetDataPresent(typeof(ListViewEx <T>));
if (isListViewEx)
{
List <T> itemsToMove = new List <T>();
ListViewEx <T> source = e.Data.GetData(typeof(ListViewEx <T>)) as ListViewEx <T>;
int index = CurrentIndex;//GetCurrentIndex(e.GetPosition);
/*
* if(index >= Items.Count)
* {
* throw new Exception("Index should be valid with the range");
* }
*/
if (source == this)
{
foreach (T o in _selItems)
{
itemsToMove.Add(o);
}
MoveData(index, itemsToMove);
_selItems.Clear();
return;
}
index = GetCurrentIndex(e.GetPosition);
if (index < 0)
{
index = Items.Count;
}
SelectedItems.Clear();
_selItems.Clear();
foreach (T o in source._selItems)
{
itemsToMove.Add(o);
}
AddData(index, itemsToMove);
}
else
{
DataObject dataObj = e.Data as DataObject;
List <string> StringSource = dataObj.GetData(typeof(List <string>)) as List <string>;
if (StringSource != null)
{
int index = GetCurrentIndex(e.GetPosition);
if (index < 0)
{
index = Items.Count;
}
SelectedItems.Clear();
_selItems.Clear();
AddDataFromFiles(index, StringSource);
}
}
}