第七章 7-5 子窗口和键盘

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这里写图片描述
// Win32Project3.cpp : 定义应用程序的入口点。//#include "stdafx.h"#include "Win32Project3.h"#define MAX_LOADSTRING 100#define DIVISIONS 5// 全局变量: HINSTANCE hInst;                                // 当前实例WCHAR szTitle[MAX_LOADSTRING];                  // 标题栏文本WCHAR szWindowClass[MAX_LOADSTRING];            // 主窗口类名TCHAR szChildClass[] = TEXT("Checker_Child");int idFocus = 0;// 此代码模块中包含的函数的前向声明: ATOM                MyRegisterClass(HINSTANCE hInstance);ATOM                MyRegisterChildClass(HINSTANCE hInstance);BOOL                InitInstance(HINSTANCE, int);LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);LRESULT CALLBACK    ChildWndProc(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: 在此放置代码。    // 初始化全局字符串    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);    LoadStringW(hInstance, IDC_WIN32PROJECT3, szWindowClass, MAX_LOADSTRING);    MyRegisterClass(hInstance);    MyRegisterChildClass(hInstance);    // 执行应用程序初始化:     if (!InitInstance (hInstance, nCmdShow))    {        return FALSE;    }    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32PROJECT3));    MSG msg;    // 主消息循环:     while (GetMessage(&msg, nullptr, 0, 0))    {        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))        {            TranslateMessage(&msg);            DispatchMessage(&msg);        }    }    return (int) msg.wParam;}////  函数: MyRegisterClass()////  目的: 注册窗口类。//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_WIN32PROJECT3));    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);    wcex.lpszMenuName = NULL;//MAKEINTRESOURCEW(IDC_WIN32PROJECT3);    wcex.lpszClassName  = szWindowClass;    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));    return RegisterClassExW(&wcex);}ATOM MyRegisterChildClass(HINSTANCE hInstance){    WNDCLASSEXW wcex;    wcex.cbSize = sizeof(WNDCLASSEX);    wcex.style = CS_HREDRAW | CS_VREDRAW;    wcex.lpfnWndProc = ChildWndProc;    wcex.cbClsExtra = 0;    wcex.cbWndExtra = sizeof(long);    wcex.hInstance = hInstance;    wcex.hIcon = NULL;//LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT3));    wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);    wcex.lpszMenuName = NULL;//MAKEINTRESOURCEW(IDC_WIN32PROJECT3);    wcex.lpszClassName = szChildClass;    wcex.hIconSm = NULL;//LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));    return RegisterClassExW(&wcex);}////   函数: InitInstance(HINSTANCE, int)////   目的: 保存实例句柄并创建主窗口////   注释: ////        在此函数中，我们在全局变量中保存实例句柄并//        创建和显示主程序窗口。//BOOL InitInstance(HINSTANCE hInstance, int nCmdShow){   hInst = hInstance; // 将实例句柄存储在全局变量中   HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);   if (!hWnd)   {      return FALSE;   }   ShowWindow(hWnd, nCmdShow);   UpdateWindow(hWnd);   return TRUE;}////  函数: WndProc(HWND, UINT, WPARAM, LPARAM)////  目的:    处理主窗口的消息。////  WM_COMMAND  - 处理应用程序菜单//  WM_PAINT    - 绘制主窗口//  WM_DESTROY  - 发送退出消息并返回////LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){    int x, y;    static int cxBlock, cyBlock;    static HWND hwndChild[DIVISIONS][DIVISIONS];    switch (message)    {    case WM_CREATE:        for(x = 0;x<DIVISIONS;x++)            for (y = 0; y < DIVISIONS; y++)            {               hwndChild[x][y] = CreateWindow(szChildClass, NULL, WS_CHILDWINDOW|WS_VISIBLE,                    0, 0, 0, 0, hWnd,(HMENU)(y<<8|x), hInst, NULL);            }        break;    case WM_SIZE:        cxBlock = LOWORD(lParam) / DIVISIONS;        cyBlock = HIWORD(lParam) / DIVISIONS;        for(x = 0;x<DIVISIONS;x++)            for (y = 0; y < DIVISIONS; y++)            {                MoveWindow(hwndChild[x][y], x*cxBlock, y*cyBlock, cxBlock, cyBlock, TRUE);            }        break;    case WM_PAINT:        {            PAINTSTRUCT ps;            HDC hdc = BeginPaint(hWnd, &ps);            // TODO: 在此处添加使用 hdc 的任何绘图代码...            EndPaint(hWnd, &ps);        }        break;    case WM_SETFOCUS:        SetFocus(GetDlgItem(hWnd, idFocus));//点击鼠标时给子窗口设置焦点        break;    case WM_KEYDOWN:        x = idFocus & 0xFF;        y = idFocus >> 8;        switch (wParam)        {        case VK_UP: y--; break;        case VK_DOWN: y++; break;        case VK_LEFT: x--; break;        case VK_RIGHT: x++; break;        case VK_HOME: x = y = 0;        case VK_END: x = y = DIVISIONS - 1;        default:            break;        }        x = (x + DIVISIONS) % DIVISIONS;        y = (y + DIVISIONS) % DIVISIONS;        idFocus = y << 8 | x;        SetFocus(GetDlgItem(hWnd, idFocus));//移动键盘是将x,y所对应的子窗口设置如焦点        break;    case WM_DESTROY:        PostQuitMessage(0);        break;    default:        return DefWindowProc(hWnd, message, wParam, lParam);    }    return 0;}LRESULT CALLBACK ChildWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){    RECT rect;    switch (message)    {    case WM_CREATE:        SetWindowLong(hWnd, 0, 0);        break;    case WM_KEYDOWN:        if (wParam != VK_SPACE && wParam != VK_RETURN)        {            //getParent 用于获得主窗口的句柄            SendMessage(GetParent(hWnd), message, wParam, lParam);            return 0;        }    case WM_LBUTTONDOWN:        SetWindowLong(hWnd, 0, 1^GetWindowLong(hWnd, 0));        SetFocus(hWnd);//强制当前子窗口获取焦点         InvalidateRect(hWnd, NULL, FALSE);        break;    case WM_SETFOCUS:        idFocus = GetWindowLong(hWnd, GWL_ID);//获取一个具体子窗口的ID    case WM_KILLFOCUS:        InvalidateRect(hWnd, NULL, TRUE);        break;    case WM_PAINT:    {        PAINTSTRUCT ps;        HDC hdc = BeginPaint(hWnd, &ps);        // TODO: 在此处添加使用 hdc 的任何绘图代码...        GetClientRect(hWnd, &rect);        Rectangle(hdc, 0, 0, rect.right, rect.bottom);        if (GetWindowLong(hWnd, 0))        {            MoveToEx(hdc, 0, 0, NULL);            LineTo(hdc, rect.right, rect.bottom);            MoveToEx(hdc, 0, rect.bottom, NULL);            LineTo(hdc, rect.right, 0);        }        if (hWnd == GetFocus())        {            rect.left += rect.right / 10;            rect.right -= rect.left;            rect.top += rect.bottom / 10;            rect.bottom -= rect.top;            SelectObject(hdc, GetStockObject(NULL_BRUSH));            SelectObject(hdc, CreatePen(PS_DASH, 0, 0));            Rectangle(hdc, rect.left, rect.top, rect.right, rect.bottom);            DeleteObject(SelectObject(hdc, GetStockObject(BLACK_PEN)));        }        EndPaint(hWnd, &ps);    }    break;    case WM_DESTROY:        PostQuitMessage(0);        break;    default:        return DefWindowProc(hWnd, message, wParam, lParam);    }    return 0;}// “关于”框的消息处理程序。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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