protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
EndDragOperation();
_dragOperation = new SelectCards(this);
e.Handled = true;
}
protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
if (e.MiddleButton == MouseButtonState.Pressed && _dragOperation == null)
{
_dragOperation = new Pan(this);
}
}
private void EndDragOperation()
{
if (_dragOperation != null)
{
_dragOperation.EndDrag();
_dragOperation = null;
}
}
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseLeftButtonDown(e);
if (!Keyboard.IsKeyDown(Key.Space))
{
return;
}
_dragOperation = new Pan(this);
e.Handled = true;
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
switch (e.ChangedButton)
{
case MouseButton.Left:
if (_dragOperation != null)
{
_dragOperation.EndDrag();
_dragOperation = null;
}
e.Handled = true;
break;
}
base.OnMouseUp(e);
}