ping-pong.cpp

// lab1-cs.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "lab1-cs.h"

#define MAX_LOADSTRING 100

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

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

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: Place code here.

    // Initialize global strings
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_LAB1CS, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);
	RegisterBallClass(hInstance);
	RegisterPaddleClass(hInstance);

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

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_LAB1CS));

    MSG msg;

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

    return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEXW 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_LAB1CS));
    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground  = CreateSolidBrush(RGB(255, 242, 0));
    wcex.lpszMenuName   = MAKEINTRESOURCEW(IDC_LAB1CS);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassExW(&wcex);
}

ATOM RegisterBallClass(HINSTANCE hInstance)
{
	WNDCLASSEXW wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = BallWndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_LAB1CS));
	wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
	wcex.hbrBackground = CreateSolidBrush(RGB(255, 0, 0));
	wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_LAB1CS);
	wcex.lpszClassName = _T("ball");
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassExW(&wcex);
}

ATOM RegisterPaddleClass(HINSTANCE hInstance)
{
	WNDCLASSEXW wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);

	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = PaddleWndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_LAB1CS));
	wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)(COLOR_ACTIVECAPTION);
	wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_LAB1CS);
	wcex.lpszClassName = _T("paddle");
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

	return RegisterClassExW(&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)
{
   hInst = hInstance; // Store instance handle in our global variable

   int screenWidth = GetSystemMetrics(SM_CXSCREEN),
	   screenHeight = GetSystemMetrics(SM_CYSCREEN);

   
   mainWindow = CreateWindowW(szWindowClass, szTitle, (WS_OVERLAPPEDWINDOW | WS_CAPTION | WS_MINIMIZEBOX | WS_MAXIMIZEBOX),
      (screenWidth - 200) / 2, (screenHeight - 300) / 2, 200, 300, nullptr, nullptr, hInstance, nullptr);
   
   if (!mainWindow)
   {
      return FALSE;
   }
   SetWindowLong(mainWindow, GWL_EXSTYLE,
	   GetWindowLong(mainWindow, GWL_EXSTYLE) | WS_EX_LAYERED | WS_EX_TOPMOST);
   SetLayeredWindowAttributes(mainWindow, 0, 255 * 0.2, LWA_ALPHA);
   SetWindowPos(mainWindow, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);

   ShowWindow(mainWindow, nCmdShow);
   UpdateWindow(mainWindow);

   ball = CreateWindowW(_T("ball"), _T("hello"), WS_CHILDWINDOW, 0, 0, 10, 10, mainWindow, nullptr, hInstance, nullptr);
   if (!ball)
	   return FALSE;
   SetLayeredWindowAttributes(ball, 0, 255, LWA_ALPHA);

   HRGN region = CreateEllipticRgn(0, 0, 10, 10);
   SetWindowRgn(ball, region, true);


   ShowWindow(ball, nCmdShow);
   UpdateWindow(ball);


   paddle = CreateWindowW(_T("paddle"), _T("hello"), WS_CHILDWINDOW, 40, 232, 40, 10, mainWindow, nullptr, hInstance, nullptr);
   if (!paddle)
	   return FALSE;
	SetLayeredWindowAttributes(paddle, 0, 255, LWA_ALPHA);

   ShowWindow(paddle, nCmdShow);
   UpdateWindow(paddle);

   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
//
//
void MovePaddle(int mouseX, int mouseY)
{
	POINT mousePos;
	mousePos.x = mouseX;
	mousePos.y = mouseY;

	int maxPossibleMouseX = WINDOW_WIDTH - PADDLE_WIDTH / 2;

	if (mousePos.x > maxPossibleMouseX)
		mousePos.x = maxPossibleMouseX;
	if (mousePos.x - PADDLE_WIDTH / 2 < 0)
		mousePos.x = PADDLE_WIDTH / 2;

	RECT paddleRect;
	GetWindowRect(paddle, &paddleRect);
	POINT topLeft;
	topLeft.x = paddleRect.left;
	topLeft.y = paddleRect.top;
	ScreenToClient(mainWindow, &topLeft);
	MoveWindow(paddle, mousePos.x - PADDLE_WIDTH / 2, topLeft.y, PADDLE_WIDTH, PADDLE_HEIGHT, TRUE);
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
	case WM_CREATE:
	{
		RECT rect;
		GetClientRect(hWnd, &rect);
		windowInsideWidth = rect.right - rect.left;
		windowInsideHeight = rect.bottom - rect.top;

		SetLayeredWindowAttributes(hWnd, NULL, 255 * 0.2, LWA_ALPHA);
		UpdateWindow(hWnd);
	}
	break;
		

	case WM_MOUSEMOVE:
		if (gameRunning)
			MovePaddle(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
		break;

    case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDM_ABOUT:
                DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                break;
			case ID_ACCELERATOR32771:
				PostQuitMessage(0);
				break;
            case IDM_EXIT:
                DestroyWindow(hWnd);
                break;
            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
            }
        }
        break;
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hWnd, &ps);
            // TODO: Add any drawing code that uses hdc here...
            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;
}

void MoveBall()
{
	RECT ballRect;
	GetWindowRect(ball, &ballRect);
	POINT ballTopLeft;
	ballTopLeft.x = ballRect.left;
	ballTopLeft.y = ballRect.top;
	ScreenToClient(mainWindow, &ballTopLeft);

	if (ballTopLeft.y >= windowInsideHeight - PADDLE_HEIGHT - BALL_HEIGHT)
	{
		// Odbicie lub nie, w zależności gdzie jest paletka
		RECT paddleRect;
		GetWindowRect(paddle, &paddleRect);
		POINT paddleTopLeft;
		paddleTopLeft.x = paddleRect.left;
		paddleTopLeft.y = paddleRect.top;
		ScreenToClient(mainWindow, &paddleTopLeft);

		if (paddleTopLeft.x <= ballTopLeft.x && paddleTopLeft.x + PADDLE_WIDTH >= ballTopLeft.x)
			ballSpeedY = -ballSpeedY;
		else
		{
			gameRunning = false;
		}
	}

	if (ballTopLeft.y < 0)
		ballSpeedY = -ballSpeedY;
	if (ballTopLeft.x < 0)
		ballSpeedX = -ballSpeedX;
	if (ballTopLeft.x >= windowInsideWidth - BALL_WIDTH)
		ballSpeedX = -ballSpeedX;
	

	MoveWindow(ball, ballTopLeft.x + ballSpeedX, ballTopLeft.y + ballSpeedY, BALL_WIDTH, BALL_HEIGHT, TRUE);
}

LRESULT CALLBACK BallWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_CREATE:
		SetTimer(hWnd, 0, 50, NULL);
		break;

	case WM_TIMER:
		if (gameRunning)
			MoveBall();
		else
			KillTimer(hWnd, NULL);
		break;

	case WM_COMMAND:
	{
		int wmId = LOWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
	}
	break;
	case WM_PAINT:
	{
		PAINTSTRUCT ps;
		HDC hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code that uses hdc here...
		EndPaint(hWnd, &ps);
	}
	break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}

LRESULT CALLBACK PaddleWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_COMMAND:
	{
		int wmId = LOWORD(wParam);
		// Parse the menu selections:
		switch (wmId)
		{
		case IDM_EXIT:
			DestroyWindow(hWnd);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
		}
	}
	break;
	case WM_PAINT:
	{
		PAINTSTRUCT ps;
		HDC hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code that uses hdc here...
		EndPaint(hWnd, &ps);
	}
	break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);
	}
	return 0;
}