/*************************************************************************************

   Extended WPF Toolkit

   Copyright (C) 2007-2013 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 

   For more features, controls, and fast professional support,
   pick up the Plus Edition at http://xceed.com/wpf_toolkit

   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids

  ***********************************************************************************/

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

namespace Xceed.Wpf.AvalonDock
{
  static class WindowHelper
  {
    public static bool IsAttachedToPresentationSource( this Visual element )
    {
      return PresentationSource.FromVisual( element as Visual ) != null;
    }

    public static void SetParentToMainWindowOf( this Window window, Visual element )
    {
      var wndParent = Window.GetWindow( element );
      if( wndParent != null )
        window.Owner = wndParent;
      else
      {
        IntPtr parentHwnd;
        if( GetParentWindowHandle( element, out parentHwnd ) )
          Win32Helper.SetOwner( new WindowInteropHelper( window ).Handle, parentHwnd );
      }
    }

    public static IntPtr GetParentWindowHandle( this Window window )
    {
      if( window.Owner != null )
        return new WindowInteropHelper( window.Owner ).Handle;
      else
        return Win32Helper.GetOwner( new WindowInteropHelper( window ).Handle );
    }


    public static bool GetParentWindowHandle( this Visual element, out IntPtr hwnd )
    {
      hwnd = IntPtr.Zero;
      HwndSource wpfHandle = PresentationSource.FromVisual( element ) as HwndSource;

      if( wpfHandle == null )
        return false;

      hwnd = Win32Helper.GetParent( wpfHandle.Handle );
      if( hwnd == IntPtr.Zero )
        hwnd = wpfHandle.Handle;
      return true;
    }

    public static void SetParentWindowToNull( this Window window )
    {
      if( window.Owner != null )
        window.Owner = null;
      else
      {
        Win32Helper.SetOwner( new WindowInteropHelper( window ).Handle, IntPtr.Zero );
      }
    }
  }
}