private void AssociatedObject_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Point position = e.GetPosition(_associatedObject);
DragManager.InitializeDrag(_associatedObject, position);
_isMouseDown = true;
}
private void AssociatedObject_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (_isMouseDown)
{
Point position = e.GetPosition(_associatedObject);
DragManager.InitiateDrag(_associatedObject, position);
}
}
private void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
{
if (!(sender is Panel panel))
{
return;
}
if (panel.Background == null)
{
panel.Background = Brushes.Transparent;
}
panel.AllowDrop = true;
panel.DragEnter += new DragEventHandler(AssociateObject_DragEnter);
panel.DragOver += new DragEventHandler(AssociatedObject_DragOver);
DragManager.RegisterDragContext(panel, AssociatedObject_DropCompleted);
}
protected override void OnChanged()
{
DragManager.RegisterDragSource(AssociatedObject, OnDragInitialize, OnDropComplete, null, null, null);
}
private void AssociatedObject_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
_isMouseDown = false;
DragManager.FinalizeDrag();
}