///////////////////////////////////////////////////////////////////////////
// BasicWindow.cpp - Demonstrates construction of Win32 GUI application  //
//                                                                       //
// Jim Fawcett, CSE775 - Distributed Objects, Summer 2010                //
///////////////////////////////////////////////////////////////////////////
/*
   Note:
   Almost all of this code was generated by the Win32 application wizard.
*/

#include "stdafx.h"
#include "BasicWindow.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];					// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];			// the main window class name

// Forward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

///////////////////////////////////////////////////////////////////////////
//  Function: _tWinMain()
//
//  Purpose:  Create Window and start message loop
//
int APIENTRY _tWinMain(HINSTANCE hInstance,
                       HINSTANCE hPrevInstance,
                       LPTSTR    lpCmdLine,
                       int       nCmdShow
                       )
{
  UNREFERENCED_PARAMETER(hPrevInstance);
  UNREFERENCED_PARAMETER(lpCmdLine);

  // TODO: Place code here.
  MSG msg;
  HACCEL hAccelTable;

  // Initialize global strings
  LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
  LoadString(hInstance, IDC_BASICWINDOW, szWindowClass, MAX_LOADSTRING);
  MyRegisterClass(hInstance);

  // Perform application initialization:
  if (!InitInstance (hInstance, nCmdShow))
  {
    return FALSE;
  }

  hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_BASICWINDOW));

  // Main message loop:
  while (GetMessage(&msg, NULL, 0, 0))
  {
    if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
  }
  return (int) msg.wParam;
}

///////////////////////////////////////////////////////////////////////////
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage are only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
  WNDCLASSEX wcex;
  wcex.cbSize = sizeof(WNDCLASSEX);

  wcex.style			= CS_HREDRAW | CS_VREDRAW;
  wcex.lpfnWndProc	= WndProc;
  wcex.cbClsExtra		= 0;
  wcex.cbWndExtra		= 0;
  wcex.hInstance		= hInstance;
  wcex.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_BASICWINDOW));
  wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
  wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
  wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_BASICWINDOW);
  wcex.lpszClassName	= szWindowClass;
  wcex.hIconSm		= LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

  return RegisterClassEx(&wcex);
}

///////////////////////////////////////////////////////////////////////////
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
  HWND hWnd;
  hInst = hInstance; // Store instance handle in our global variable

  hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
    CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

  if (!hWnd)
  {
    return FALSE;
  }

  ShowWindow(hWnd, nCmdShow);
  UpdateWindow(hWnd);
  return TRUE;
}

///////////////////////////////////////////////////////////////////////////
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	  - Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	int wmId, wmEvent;
  PAINTSTRUCT ps;
  static HDC hdc;
  static RECT rect;
  static wchar_t* msg = L"Hello CSE775 - Distributed Objects";
  static HFONT hf = NULL;
  static UINT timer = 0;
  static int x1=0, y1=0, x2=0, y2=0;
  static bool timerSwitch = true;
  #define ID_Timer 1
  long lfHeight;
    
  HGDIOBJ hOld = NULL;

  switch (message)
  {
  case WM_CREATE:
    // set font-size to 24 point, font-family to Tahoma
    hdc = GetDC(NULL);
    lfHeight = -MulDiv(24, GetDeviceCaps(hdc, LOGPIXELSY), 72);
    ReleaseDC(NULL, hdc);
    hf = CreateFont(lfHeight, 0, 0, 0, 0, TRUE, 0, 0, 0, 0, 0, 0, 0, L"Tahoma");
    timer = SetTimer ( hWnd, ID_Timer, 500, NULL );
    break;
  case WM_COMMAND:
    wmId    = LOWORD(wParam);
    wmEvent = HIWORD(wParam);
    // Parse the menu selections:
    switch (wmId)
    {
    case IDM_ABOUT:
      DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
      break;
    case IDM_EXIT:
      DestroyWindow(hWnd);
      break;
    default:
      return DefWindowProc(hWnd, message, wParam, lParam);
    }
    break;
  case WM_LBUTTONDOWN:
    MessageBox(NULL,L"Left button clicked",L"Message Notification",MB_OK);
    break;
  case WM_TIMER:
    // paint rectangle on alternate clock ticks otherwise erase
    x1 = 100;
    y1 = 100;
    x2 = rect.right - 100;
    y2 = rect.bottom - 100;
    hdc = GetDC(hWnd); 
    MoveToEx(hdc, (int) x1, (int) y1, (LPPOINT) NULL); 
    LineTo(hdc, (int) x2, (int) y1);
    LineTo(hdc, (int) x2, (int) y2);
    LineTo(hdc, (int) x1, (int) y2);
    LineTo(hdc, (int) x1, (int) y1);
    ReleaseDC(hWnd, hdc); 
    // request call to paint
    InvalidateRect(hWnd,&rect,timerSwitch);
    // toggle timerSwitch
    timerSwitch = timerSwitch ? false : true;
    break;
  case WM_PAINT:
    hdc = BeginPaint(hWnd, &ps);
    hOld = SelectObject(hdc,hf);
    GetClientRect(hWnd,&rect);
    DrawText(hdc,msg,wcslen(msg),&rect,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
    SelectObject(hdc,hOld);
    EndPaint(hWnd, &ps);
    break;
  case WM_DESTROY:
    PostQuitMessage(0);
    break;
  default:
    return DefWindowProc(hWnd, message, wParam, lParam);
  }
  return 0;
}

///////////////////////////////////////////////////////////////////////////
// Message handler for about box.
//
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
  UNREFERENCED_PARAMETER(lParam);
  switch (message)
  {
  case WM_INITDIALOG:
    return (INT_PTR)TRUE;

  case WM_COMMAND:
    if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
    {
      EndDialog(hDlg, LOWORD(wParam));
      return (INT_PTR)TRUE;
    }
    break;
    }
  return (INT_PTR)FALSE;
}