using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Urasandesu.NTroll.PInvoke;

using System.Diagnostics;

using Urasandesu.NAnonym.Linq;

using System.ComponentModel;

using System.Runtime.InteropServices;

using Urasandesu.NTroll.PInvoke.Structures;

using Urasandesu.NTroll.PInvoke.Enums;

using System.Drawing;

using System.Windows.Interop;

using System.Collections.ObjectModel;



namespace Urasandesu.NTroll.EnumerateWindowsSample

{

    /// <summary>

    /// Window1.xaml の相互作用ロジック

    /// </summary>

    public partial class Window1 : Window

    {

        public Window1()

        {

            InitializeComponent();

        }



        private void button1_Click(object sender, RoutedEventArgs e)

        {

            IntPtr window1HWnd = ((HwndSource)HwndSource.FromVisual(this)).Handle;

            //var zOrder = new LinkedList<IntPtr>();

            //var zOrder = new List<IntPtr>();



            bool success = 

            User32.EnumWindows(

                (hWnd, lParam) =>

                {

                    if (!User32.IsWindowVisible(hWnd)) return true;



                    // MEMO: ／(^o^)＼ http://stackoverflow.com/questions/295996/is-the-order-in-which-handles-are-returned-by-enumwindows-meaningful

                    string title = GetWindowTitle(hWnd);

                    if (!string.IsNullOrEmpty(title))

                    {

                        Console.WriteLine("Window: {0}", title);

                    }



                    //IntPtr hWndPrev = IntPtr.Zero;

                    //var hWndNode = default(LinkedListNode<IntPtr>);

                    //var hWndPrevNode = default(LinkedListNode<IntPtr>);

                    //if ((hWndPrev = User32.GetWindow(hWnd, GetWindow_Cmd.GW_HWNDPREV)) != IntPtr.Zero)

                    //{

                    //    if (zOrder.Count == 0)

                    //    {

                    //        hWndNode = zOrder.AddFirst(hWnd);

                    //        zOrder.AddAfter(hWndNode, hWndPrev);

                    //    }

                    //    else

                    //    {

                    //        if ((hWndNode = zOrder.Find(hWnd)) != null)

                    //        {

                    //            if ((hWndPrevNode = zOrder.FindLast(hWndPrev)) != null)

                    //            {

                    //                zOrder.Remove(hWndPrevNode);

                    //            }

                    //            zOrder.AddAfter(hWndNode, hWndPrev);

                    //        }

                    //        else if ((hWndPrevNode = zOrder.Find(hWndPrev)) != null)

                    //        {

                    //            if ((hWndNode = zOrder.FindLast(hWnd)) != null)

                    //            {

                    //                zOrder.Remove(hWndNode);

                    //            }

                    //            zOrder.AddBefore(hWndPrevNode, hWnd);

                    //        }

                    //        else

                    //        {

                    //            hWndNode = zOrder.AddLast(hWnd);

                    //            zOrder.AddAfter(hWndNode, hWndPrev);

                    //        }

                    //    }

                    //}

                    //else

                    //{

                    //    Console.WriteLine("Expected error at GetWindow. {0}", new Win32Exception(Marshal.GetLastWin32Error()).Message);

                    //}



                    return true;

                }, 

                IntPtr.Zero);



            if (!success)

            {

                Console.WriteLine("Expected error at EnumThreadWindows.");

            }



            //Console.WriteLine("Z-Order: ");

            //zOrder.ForEach(

            //hWnd =>

            //{

            //    string title = GetWindowTitle(hWnd);

            //    if (!string.IsNullOrEmpty(title))

            //    {

            //        Console.WriteLine("Window: {0}", title);

            //    }

            //});

        }



        private void button2_Click(object sender, RoutedEventArgs e)

        {

            new Window2() { Owner = this, Title = "Hoge" }.Show();

        }



        string GetWindowTitle(IntPtr hWnd)

        {

            int length = User32.GetWindowTextLength(hWnd);

            if (0 < length)

            {

                var lpString = new StringBuilder(length + 1);

                if (0 < User32.GetWindowText(hWnd, lpString, lpString.Capacity))

                {

                    return lpString.ToString();

                }

                else

                {

                    //Console.WriteLine("Expected error at GetWindowText. {0}", new Win32Exception(Marshal.GetLastWin32Error()).Message);

                    return null;

                }

            }

            else

            {

                //Console.WriteLine("Expected error at GetWindowTextLength. {0}", new Win32Exception(Marshal.GetLastWin32Error()).Message);

                return null;

            }

        }

    }

}