Helper class to play with Window (Owners and position)

Lot of usercontrols like popup windows, custom-built tooltip windoes, detail-descriptive windows are launched from our code using the
Show or ShowDialog methods.

But most of the times we incorrectly determine the parent of the such a window. And moreover, we can't position them aptly.



The following code shows how to use the helper class to do all these.
Popupdialog is the Popup window.  The MovewindowIntoBoundsOfScreen moves the Popup dialog and sets the location of the popup aptly.

private

void PopupDialog_Loaded(object sender, RoutedEventArgs e)

{

      WindowHelper.MoveWindowIntoBoundsOfScreen(this);

      //
      
      //

}

//Toset the owner property use the GetOwnerWindow method of the helper class.

newPopupDialog

.Owner = WindowHelper.GetOwnerWindow(panel1);
CODE:  

using System;
using System.Windows;
using System.Windows.Media;

namespace Helpers
{
    /// <summary>
    /// Window Helper class.
    /// </summary>
    public class WindowHelper
    {
         /// <summary>
        /// Gets the owner window.
        /// </summary>
        /// <param name="dependencyObject">The dependency object.</param>
        /// <returns></returns>
        public static Window GetOwnerWindow(DependencyObject dependencyObject)
        {
            DependencyObject parent = dependencyObject;
            DependencyObject nextParent = parent;
             while (nextParent != null && !(nextParent is Window))
            {
                parent = LogicalTreeHelper.GetParent(nextParent);
                 if (parent == null && nextParent is Visual)
                {
                    parent = VisualTreeHelper.GetParent(nextParent);
                }
                nextParent = parent;
            }

            Window w = parent as Window;

             if (w != null)
            {
                 return w;
            }
            return Application.Current.MainWindow;
         }

        /// <summary>
        /// Moves the window into bounds of screen.
        /// </summary>
        /// <param name="window">The window.</param>
        public static void MoveWindowIntoBoundsOfScreen(Window window)
        {
            Rect screenDimensions = SystemParameters.WorkArea;

             if (window.ActualWidth > (screenDimensions.Right - screenDimensions.Left))
            {
                window.Width = screenDimensions.Right - screenDimensions.Left;
             }

             if (window.ActualHeight > (screenDimensions.Bottom - screenDimensions.Top))
            {
                window.Height = screenDimensions.Bottom - screenDimensions.Top;
             }

             if (!double.IsNaN(screenDimensions.Left) && screenDimensions.Left > window.Left)
            {
                window.Left = screenDimensions.Left;
             }
             else if (!double.IsNaN(screenDimensions.Right) && screenDimensions.Right < (window.Left + window.ActualWidth))
            {
                window.Left = screenDimensions.Right - window.ActualWidth;
             }

             if (!double.IsNaN(screenDimensions.Top) && screenDimensions.Top > window.Top)
            {
                window.Top = screenDimensions.Top;
             }
             else if (!double.IsNaN(screenDimensions.Bottom) && screenDimensions.Bottom < (window.Top + window.ActualHeight))
            {
                window.Top = screenDimensions.Bottom - window.ActualHeight;
             }

         }
    }
}