private void _adorner_MouseUp(object sender, MouseEventArgs e)
{
switch (_adorner.AdornerDropState)
{
case DropState.CanDrop:
try
{
((Storyboard)_adorner.Resources["canDrop"]).Completed += (s, args) =>
{
_adornerLayer.Children.Clear();
_adornerLayer.Visibility = Visibility.Collapsed;
};
((Storyboard)_adorner.Resources["canDrop"]).Begin(_adorner);
if (ItemDropped != null)
{
ItemDropped(_adorner, new DragDropEventArgs(_draggedData));
}
}
catch (Exception ex)
{ }
break;
case DropState.CannotDrop:
try
{
Storyboard sb = _adorner.Resources["cannotDrop"] as Storyboard;
DoubleAnimation aniX = sb.Children[0] as DoubleAnimation;
aniX.To = _delta.X;
DoubleAnimation aniY = sb.Children[1] as DoubleAnimation;
aniY.To = _delta.Y;
sb.Completed += (s, args) =>
{
_adornerLayer.Children.Clear();
_adornerLayer.Visibility = Visibility.Collapsed;
};
sb.Begin(_adorner);
}
catch (Exception ex) { }
break;
}
_draggedData = null;
_adornerLayer.PreviewMouseMove -= new MouseEventHandler(_adorner_MouseMove);
_adornerLayer.PreviewMouseUp -= new MouseButtonEventHandler(_adorner_MouseUp);
if (_adorner != null)
{
_adorner.ReleaseMouseCapture();
}
_adorner = null;
_mouseCaptured = false;
}
// Drag = mouse down + move by a certain amount
private void DragSource_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (!_mouseCaptured && _draggedData != null)
{
// Only drag when user moved the mouse by a reasonable amount.
if (DragDropHelper.IsMovementBigEnough(_initialMousePosition, e.GetPosition(_topWindow)))
{
_adorner = (DragDropAdornerBase)GetDragDropControl(sender as DependencyObject);
_adorner.DataContext = _draggedData;
_adorner.Opacity = 0.7;
_adornerLayer.Visibility = Visibility.Visible;
_adornerLayer.Children.Add(_adorner);
_mouseCaptured = Mouse.Capture(_adorner);
Canvas.SetLeft(_adorner, _initialMousePosition.X - 20);
Canvas.SetTop(_adorner, _initialMousePosition.Y - 15);
_adornerLayer.PreviewMouseMove += new MouseEventHandler(_adorner_MouseMove);
_adornerLayer.PreviewMouseUp += new MouseButtonEventHandler(_adorner_MouseUp);
}
}
}
private void _adorner_MouseUp(object sender, MouseEventArgs e)
{
switch (_adorner.AdornerDropState)
{
case DropState.CanDrop:
try
{
((Storyboard)_adorner.Resources["canDrop"]).Completed += (s, args) =>
{
_adornerLayer.Children.Clear();
_adornerLayer.Visibility = Visibility.Collapsed;
};
((Storyboard)_adorner.Resources["canDrop"]).Begin(_adorner);
if (ItemDropped != null)
ItemDropped(_adorner, new DragDropEventArgs(_draggedData));
}
catch (Exception ex)
{ }
break;
case DropState.CannotDrop:
try
{
Storyboard sb = _adorner.Resources["cannotDrop"] as Storyboard;
DoubleAnimation aniX = sb.Children[0] as DoubleAnimation;
aniX.To = _delta.X;
DoubleAnimation aniY = sb.Children[1] as DoubleAnimation;
aniY.To = _delta.Y;
sb.Completed += (s, args) =>
{
_adornerLayer.Children.Clear();
_adornerLayer.Visibility = Visibility.Collapsed;
};
sb.Begin(_adorner);
}
catch (Exception ex) { }
break;
}
_draggedData = null;
_adornerLayer.PreviewMouseMove -= new MouseEventHandler(_adorner_MouseMove);
_adornerLayer.PreviewMouseUp -= new MouseButtonEventHandler(_adorner_MouseUp);
if (_adorner != null)
{
_adorner.ReleaseMouseCapture();
}
_adorner = null;
_mouseCaptured = false;
}
// Drag = mouse down + move by a certain amount
private void DragSource_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (!_mouseCaptured && _draggedData != null)
{
// Only drag when user moved the mouse by a reasonable amount.
if (DragDropHelper.IsMovementBigEnough(_initialMousePosition, e.GetPosition(_topWindow)))
{
_adorner = (DragDropAdornerBase)GetDragDropControl(sender as DependencyObject);
_adorner.DataContext = _draggedData;
_adorner.Opacity = 0.7;
_adornerLayer.Visibility = Visibility.Visible;
_adornerLayer.Children.Add(_adorner);
_mouseCaptured = Mouse.Capture(_adorner);
Canvas.SetLeft(_adorner, _initialMousePosition.X - 20);
Canvas.SetTop(_adorner, _initialMousePosition.Y - 15);
_adornerLayer.PreviewMouseMove+=new MouseEventHandler(_adorner_MouseMove);
_adornerLayer.PreviewMouseUp += new MouseButtonEventHandler(_adorner_MouseUp);
}
}
}
public static void DropStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DragDropAdornerBase myclass = (DragDropAdornerBase)d;
myclass.StateChangedHandler(d, e);
}
