WindowPanel limit position

DmitryAleshkovsky

When i drag my windowpanel over application window, i can drag winodow's header under the browser toolbar and under browser command line. After i release mouse button i can't get window back (look attachment).
How to limit windowpanel position inside application window?

windowpanel under browser toolbar.png

DmitryAleshkovsky

Hope, now Window Panel is designed for that

for WindowPanel.xaml.cs

        private void headerDragRectangle_MouseMove(object sender, MouseEventArgs e)
        {
            if (isTrackingMouse)
            {
                Rectangle rect = sender as Rectangle;
                Point point = e.GetPosition(null);
                double aWidth = Application.Current.Host.Content.ActualWidth / Application.Current.Host.Content.ZoomFactor;
                double aHeight = Application.Current.Host.Content.ActualHeight / Application.Current.Host.Content.ZoomFactor;
                if (point.X < 0) point.X = 0;
                if (point.Y < 0) point.Y = 0;
                if (point.X > aWidth) point.X = aWidth;
                if (point.Y > aHeight) point.Y = aHeight;
                double x0 = this.renderTransform.X;
                double y0 = this.renderTransform.Y;
                double sign = 1;
                if (FlowDirection == System.Windows.FlowDirection.RightToLeft)
                    sign = -1;
                this.renderTransform.X = x0 + (point.X - mouseOffset.X) * sign;
                this.renderTransform.Y = y0 + point.Y - mouseOffset.Y;
                mouseOffset = point;
            }
        }