protected virtual void OnHeaderMouseMove(object sender, MouseEventArgs e)
{
//Point ptMouseMove = e.GetPosition(this);
Point ptMouseMove = e.GetPosition((IInputElement)System.Windows.Media.VisualTreeHelper.GetParent(this));
if (!e.Handled && isMouseDown && e.LeftButton == MouseButtonState.Pressed)
{
if (_partHeader != null &&
_partHeader.IsMouseOver)
{
DockingManager manager = GetManager();
if (!manager.DragPaneServices.IsDragging &&
!IsMouseCaptured)
{
if (Math.Abs(ptMouseMove.X - ptStartDrag.X) > SystemParameters.MinimumHorizontalDragDistance ||
Math.Abs(ptMouseMove.Y - ptStartDrag.Y) > SystemParameters.MinimumVerticalDragDistance)
{
isMouseDown = false;
ReleaseMouseCapture();
manager.Drag(this, this.PointToScreenDPI(e.GetPosition(this)), e.GetPosition(this));
e.Handled = true;
}
}
}
}
}