private void DisplayList_PreviewMouseMove(object sender, MouseEventArgs e)
{
//if the left mouse button is not pressed, then we can't be dragging anything
if (e.LeftButton != MouseButtonState.Pressed || !(sender is ListBox) || (_clickedGame == null))
{
return;
}
var mousePos = e.GetPosition(null);
var diff = _startPoint - mousePos;
//If we travel far enough, begin the drag
if (Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance || Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance)
{
_clickedGame = null;
foreach (object selItem in _selItems)
{
if (!DisplayList.SelectedItems.Contains(selItem))
{
DisplayList.SelectedItems.Add(selItem);
}
}
//The sender is always the list box
var listBox = (ListBox)sender;
var items = listBox.SelectedItems.OfType <RemoteSteamApp>().ToArray();
FriendTransfer transferData = new FriendTransfer((FriendViewModel)listBox.DataContext, items);
DataObject dragData = new DataObject(DRAG_DATA_NAME, transferData);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
}
}
private void DisplayList_PreviewMouseMove(object sender, MouseEventArgs e)
{
//if the left mouse button is not pressed, then we can't be dragging anything
if (e.LeftButton != MouseButtonState.Pressed || !(_mousePressOrigSource is DependencyObject))
{
return;
}
if (!(sender is ListBox))
{
return;
}
var mousePos = e.GetPosition(null);
var diff = _startPoint - mousePos;
//If we travel far enough, begin the drag
if (Math.Abs(diff.X) > SystemParameters.MinimumHorizontalDragDistance || Math.Abs(diff.Y) > SystemParameters.MinimumVerticalDragDistance)
{
//The sender is always the list box
var listBox = (ListBox)sender;
//Find a ListBoxItem ancestor of the mouse press original source (the top hit-detection item, not the item that handled the event)
var listBoxItem = FindAncestor <ListBoxItem>((DependencyObject)_mousePressOrigSource);
if (listBoxItem != null && listBoxItem.DataContext is RemoteSteamApp)
{
var item = listBoxItem.DataContext;
FriendTransfer transferData = new FriendTransfer((FriendViewModel)listBox.DataContext, (RemoteSteamApp)listBoxItem.DataContext);
DataObject dragData = new DataObject(DRAG_DATA_NAME, transferData);
DragDrop.DoDragDrop(listBoxItem, dragData, DragDropEffects.Move);
}
}
}
