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Moving Bitmaps

levijgraham (27)
I am trying to move the player.bmp but i just cant figure it out i have tried over and over again but i just dont know how to update the players position.

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// ZombieGame.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "ZombieGame.h"
#include "tchar.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

int iPlayerXold = 0;
int iPlayerYold = 0;

// 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);

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_ZOMBIEGAME, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

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

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

	// 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_ZOMBIEGAME));
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName	= MAKEINTRESOURCE(IDC_ZOMBIEGAME);
	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, false,
      0, 0, 640, 480, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}


bool LoadAndBlitBitmap(LPCWSTR szFileName, HDC hWinDC, int iPlayerX = iPlayerXold, int iPlayerY = iPlayerYold)
{
	// Load the bitmap image file
	HBITMAP hBitmap;
	hBitmap = (HBITMAP)::LoadImage(NULL, szFileName, IMAGE_BITMAP, iPlayerX, iPlayerY,
		LR_LOADFROMFILE);
	// Verify that the image was loaded
	if (hBitmap == NULL) {
		::MessageBox(NULL, __T("LoadImage Failed"), __T("Error"), MB_OK);
		return false;
	}

	// Create a device context that is compatible with the window
	HDC hLocalDC;
	hLocalDC = ::CreateCompatibleDC(hWinDC);
	// Verify that the device context was created
	if (hLocalDC == NULL) {
		::MessageBox(NULL, __T("CreateCompatibleDC Failed"), __T("Error"), MB_OK);
		return false;
	}

	// Get the bitmap's parameters and verify the get
	BITMAP qBitmap;
	int iReturn = GetObject(reinterpret_cast<HGDIOBJ>(hBitmap), sizeof(BITMAP),
		reinterpret_cast<LPVOID>(&qBitmap));
	if (!iReturn) {
		::MessageBox(NULL, __T("GetObject Failed"), __T("Error"), MB_OK);
		return false;
	}

	// Select the loaded bitmap into the device context
	HBITMAP hOldBmp = (HBITMAP)::SelectObject(hLocalDC, hBitmap);
	if (hOldBmp == NULL) {
		::MessageBox(NULL, __T("SelectObject Failed"), __T("Error"), MB_OK);
		return false;
	}

	// Blit the dc which holds the bitmap onto the window's dc
	BOOL qRetBlit = ::BitBlt(hWinDC, iPlayerXold, iPlayerYold, qBitmap.bmWidth, qBitmap.bmHeight,
		hLocalDC, 0, 0, SRCCOPY);
	if (!qRetBlit) {
		::MessageBox(NULL, __T("Blit Failed"), __T("Error"), MB_OK);
		return false;
	}

	// Unitialize and deallocate resources
	::SelectObject(hLocalDC, hOldBmp);
	::DeleteDC(hLocalDC);
	::DeleteObject(hBitmap);
	return true;
}
levijgraham (27)
Part 2

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//
//  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;
	HDC hdc;

	switch (message)
	{
case WM_CHAR:
{
    switch (wParam) {
        case _T('d'):
        {
            ::MessageBox(hWnd, _T("d") , _T("Key Pressed"), MB_OK);
            break;
        }
        case _T('D'):
        {
            ::MessageBox(hWnd, _T("D") , _T("Key Pressed"), MB_OK);
            break;
        }
    }
	 switch (wParam) {
        case _T('a'):
        {
            ::MessageBox(hWnd, _T("a") , _T("Key Pressed"), MB_OK);
            break;
        }
        case _T('A'):
        {
            ::MessageBox(hWnd, _T("A") , _T("Key Pressed"), MB_OK);
            break;
        }
    }
	  switch (wParam) {
        case _T('s'):
        {
			iPlayerXold = ++iPlayerXold;
            ::MessageBox(hWnd, _T("s") , _T("Key Pressed"), MB_OK);
            break;
        }
        case _T('S'):
        {
            ::MessageBox(hWnd, _T("S") , _T("Key Pressed"), MB_OK);
            break;
        }
    }
	 switch (wParam) {
        case _T('w'):
        {
            ::MessageBox(hWnd, _T("w") , _T("Key Pressed"), MB_OK);
            break;
        }
        case _T('W'):
        {
            ::MessageBox(hWnd, _T("W") , _T("Key Pressed"), MB_OK);
            break;
        }
    }
    break;
}

	case WM_LBUTTONDOWN:
{
    int iPosX = LOWORD(lParam);
    int iPosY = HIWORD(lParam);
    wchar_t waCoord[20];
    wsprintf(waCoord, _T("(%i, %i)"), iPosX, iPosY);
    ::MessageBox(hWnd, waCoord, _T("LMB Click"), MB_OK);
    break;
}
case WM_RBUTTONDOWN:
{
    int iPosX = LOWORD(lParam);
    int iPosY = HIWORD(lParam);
    wchar_t waCoord[20];
    wsprintf(waCoord, _T("(%i, %i)"), iPosX, iPosY);
    ::MessageBox(hWnd, waCoord, _T("RMB Click"), MB_OK);
    break;
}
	case WM_COMMAND:
		wmId    = LOWORD(wParam);
		wmEvent = HIWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case IDM_ABOUT:
			::MessageBox(hWnd, _T("ZombieGame, Version 1.0\nCopyright(C) 2011\nLithium Designs") , _T("About"), MB_OK);
			break;
		case IDM_EXIT:
			{
			int iMessage = ::MessageBox(hWnd, _T("Are you sure you want to quit?") , _T("Quit"), MB_YESNO | MB_ICONQUESTION);
			switch (iMessage) {
			case IDYES:
				{
			DestroyWindow(hWnd);
			break;
				}
			case IDNO:
				{
			break;
				}
			}
			}
		case IDM_NEWGAME:
			{
			int iMessage = ::MessageBox(hWnd, _T("Are you sure you want to start a new game?") , _T("New Game"), MB_YESNO | MB_ICONQUESTION);
			switch (iMessage) {
			case IDYES:
				{
			::MessageBox(hWnd, _T("New Game not implemented yet") , _T("New Game"), MB_OK | MB_ICONHAND);
			break;
				}
			case IDNO:
				{
			break;
				}
			}
			}
		case IDM_LOADGAME:
			{
			int iMessage = ::MessageBox(hWnd, _T("Are you sure you want to load a game?") , _T("New Game"), MB_YESNO | MB_ICONQUESTION);
			switch (iMessage) {
			case IDYES:
				{
			::MessageBox(hWnd, _T("Load Game not implemented yet") , _T("Load Game"), MB_OK | MB_ICONHAND);
			break;
				}
			case IDNO:
				{
			break;
				}
			}
			}
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);

		// TODO: Add any drawing code here...
		LoadAndBlitBitmap( _T("DirtyGrass.bmp") , hdc , 0 , 0);
		LoadAndBlitBitmap( _T("Player.bmp") , hdc , iPlayerXold , iPlayerYold);
		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;
}
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