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#include <windows.h>
#include <commctrl.h>
#include <algorithm>
#include <richedit.h>

enum WindowCtrlId
{
   EditWindowId = 130
};

enum CommandEnum
{
   AboutCmd = 1025,
   ChooseFontCmd,
};

HINSTANCE InstanceHandle;
HWND  MainWindow, EditWindow;
HFONT Font;
LOGFONT LogFont;

void OnChooseFont()
{
   CHOOSEFONT ChooseFontStruct;
   memset(&ChooseFontStruct, 0, sizeof(ChooseFontStruct));
   ChooseFontStruct.lStructSize = sizeof(ChooseFontStruct);
   ChooseFontStruct.hwndOwner = MainWindow;
   ChooseFontStruct.lpLogFont = &LogFont;
   ChooseFontStruct.rgbColors = RGB(0, 0, 0);
   ChooseFontStruct.Flags = CF_INITTOLOGFONTSTRUCT | CF_SCREENFONTS | CF_EFFECTS;
   if(ChooseFont(&ChooseFontStruct))
   {
      DeleteObject(Font);
      Font = CreateFontIndirect(&LogFont);
      SendMessage(EditWindow, WM_SETFONT, (WPARAM)Font, TRUE);
   }
}

LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
   switch (msg)
   {
   case WM_DESTROY:
      PostQuitMessage(0);
      break;
   case WM_CREATE:
      MainWindow = hwnd;
      EditWindow = CreateWindow(RICHEDIT_CLASS,
                                "",
                                WS_VISIBLE | WS_VSCROLL | WS_CHILD | ES_MULTILINE | WS_HSCROLL,
                                20, 20, 100, 100,
                                MainWindow,
                                (HMENU )EditWindowId,
                                InstanceHandle,
                                0);


      SendMessage(EditWindow, WM_SETFONT, (WPARAM )Font, FALSE);
      SetFocus(EditWindow);
      break;
   case WM_COMMAND:
      switch(LOWORD(wParam))
      {
      case AboutCmd:
         MessageBox(MainWindow, "TextEditor\\r\\nCopyright Bertel Brander 2006", "TextEditor", MB_OK);
         break;
      case ChooseFontCmd:
         OnChooseFont();
         break;
      }
      break;
   case WM_SIZE:
      RECT ClientRect;
      GetClientRect(hwnd, &ClientRect);
      MoveWindow(EditWindow, ClientRect.left, ClientRect.top, ClientRect.right - ClientRect.left, ClientRect.bottom - ClientRect.top, TRUE);
      break;
   default:
      return DefWindowProc(hwnd, msg, wParam, lParam);
   }
   return 0;
}

HWND CreateMainWindow()
{
   WNDCLASS wc;
   memset(&wc, 0, sizeof(WNDCLASS));
   wc.style = CS_HREDRAW | CS_VREDRAW  | CS_DBLCLKS ;
   wc.lpfnWndProc = (WNDPROC )MainWndProc;
   wc.hInstance = InstanceHandle;
   wc.hbrBackground = (HBRUSH )(COLOR_WINDOW + 1);
   wc.lpszClassName = "SimpleWinWndClass";
   wc.lpszMenuName = 0;
   wc.hCursor = LoadCursor(NULL, IDC_ARROW);
   wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
   if(!RegisterClass(&wc))
      return 0;

   HMENU OptionsMenu = CreateMenu();
   AppendMenu(OptionsMenu, MF_STRING, ChooseFontCmd, "Font");

   HMENU HelpMenu = CreateMenu();
   AppendMenu(HelpMenu, MF_STRING, AboutCmd, "About");

   HMENU MainMenu = CreateMenu();
   AppendMenu(MainMenu, MF_POPUP, (UINT )OptionsMenu, "Options");
   AppendMenu(MainMenu, MF_POPUP, (UINT )HelpMenu, "Help");

   return CreateWindow("SimpleWinWndClass",
                       "Simple Text Editor",
                       WS_MINIMIZEBOX | WS_VISIBLE | WS_MAXIMIZEBOX |
                       WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_CAPTION |
                       WS_BORDER | WS_SYSMENU | WS_THICKFRAME,
                       CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,
                       0,
                       MainMenu,
                       InstanceHandle,
                       0);
}

int WINAPI WinMain(HINSTANCE Instance,
                   HINSTANCE,
                   LPSTR,
                   INT)
{
   InstanceHandle = Instance;

   InitCommonControls();
   HMODULE hMod = LoadLibrary("riched20.DLL");
   if(!hMod)
   {
      MessageBox(0, "Failed to load dll", "TextApp", MB_OK);
   }

   if((MainWindow = CreateMainWindow()) == (HWND )0)
   {
      MessageBox(0, "Failed to create MainWindow!", "TextEditor", MB_OK);
      return 0;
   }

   Font = (HFONT )GetStockObject(DEFAULT_GUI_FONT);

   ShowWindow(MainWindow, SW_SHOW);
   MSG Msg;
   while(GetMessage(&Msg, 0, 0, 0))
   {
      TranslateMessage(&Msg);
      DispatchMessage(&Msg);
   }
   return Msg.wParam;
}