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第七章 鼠标(CHECKER3)

发布时间:2019-10-11 03:51编辑:新葡亰平台娱乐浏览(116)

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      1 /*---------------------------------------------
      2 CHECKER3.C -- Mouse Hit-Test Demo Program No.3
      3               (c) Charles Petzold, 1998
      4 ---------------------------------------------*/
      5 
      6 #include <Windows.h>
      7 
      8 #define DIVISIONS 5
      9 
     10 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
     11 LRESULT CALLBACK ChildWndProc(HWND, UINT, WPARAM, LPARAM);
     12 
     13 TCHAR szChildClass[] = TEXT("Checker3_Child");
     14 
     15 int WINAPI WinMain( __in HINSTANCE hInstance
     16                     , __in_opt HINSTANCE hPrevInstance
     17                     , __in LPSTR lpCmdLine
     18                     , __in int nShowCmd )
     19 {
     20     static TCHAR szAppName[] = TEXT("Checker3");
     21     HWND hwnd;
     22     MSG msg;
     23     WNDCLASS wndclass;
     24 
     25     wndclass.style = CS_HREDRAW | CS_VREDRAW;
     26     wndclass.lpfnWndProc = WndProc;
     27     wndclass.cbClsExtra = 0;
     28     wndclass.cbWndExtra = 0;
     29     wndclass.hInstance = hInstance;
     30     wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     31     wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
     32     wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
     33     wndclass.lpszMenuName = NULL;
     34     wndclass.lpszClassName = szAppName;
     35 
     36     if (!RegisterClass(&wndclass))
     37     {
     38         MessageBox(NULL, TEXT("Program requires Windows NT!")
     39             , szAppName, MB_ICONERROR);
     40         return 0;
     41     }
     42 
     43     wndclass.lpfnWndProc = ChildWndProc;
     44     wndclass.cbWndExtra = sizeof(long);
     45     wndclass.hIcon = NULL;
     46     wndclass.lpszClassName = szChildClass;
     47 
     48     RegisterClass(&wndclass);
     49 
     50     hwnd = CreateWindow(szAppName, TEXT("Checker3 Mouse Hit-Test Demo")
     51         , WS_OVERLAPPEDWINDOW
     52         , CW_USEDEFAULT, CW_USEDEFAULT
     53         , CW_USEDEFAULT, CW_USEDEFAULT
     54         , NULL, NULL, hInstance, NULL);
     55 
     56     ShowWindow(hwnd, nShowCmd);
     57     UpdateWindow(hwnd);
     58 
     59     while (GetMessage(&msg, NULL, 0, 0))
     60     {
     61         TranslateMessage(&msg);
     62         DispatchMessage(&msg);
     63     }
     64 
     65     return msg.wParam;
     66 }
     67 
     68 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
     69 {
     70     static HWND hwndChild[DIVISIONS][DIVISIONS];
     71     int cxBlock, cyBlock, x, y;
     72 
     73     switch (message)
     74     {
     75     case WM_CREATE:
     76         for (x = 0; x != DIVISIONS; ++x)
     77             for (y = 0; y != DIVISIONS; ++y)
     78             {
     79                 hwndChild[x][y] = CreateWindow(szChildClass, NULL
     80                     , WS_CHILDWINDOW | WS_VISIBLE
     81                     , 0, 0, 0, 0
     82                     , hwnd, (HMENU)(y << 8 | x)
     83                     , (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE)
     84                     , NULL);
     85             }
     86         return 0;
     87 
     88     case WM_SIZE:
     89         cxBlock = LOWORD(lParam) / DIVISIONS;
     90         cyBlock = HIWORD(lParam) / DIVISIONS;
     91 
     92         for (x = 0; x != DIVISIONS; ++x)
     93             for(y = 0; y != DIVISIONS; ++y)
     94             {
     95                 MoveWindow(hwndChild[x][y]
     96                     , x * cxBlock, y * cyBlock
     97                     , cxBlock, cyBlock, TRUE);
     98             }
     99         return 0;
    100 
    101     case WM_LBUTTONDOWN:
    102         MessageBeep(0);
    103         return 0;
    104 
    105     case WM_DESTROY:
    106         PostQuitMessage(0);
    107         return 0;
    108     }
    109 
    110     return DefWindowProc(hwnd, message, wParam, lParam);
    111 }
    112 
    113 LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    114 {
    115     HDC hdc;
    116     PAINTSTRUCT ps;
    117     RECT rect;
    118 
    119     switch (message)
    120     {
    121     case WM_CREATE:
    122         SetWindowLong(hwnd, 0, 0);    // on/off flag
    123         return 0;
    124 
    125     case WM_LBUTTONDOWN:
    126         SetWindowLong(hwnd, 0, 1 ^ GetWindowLong(hwnd, 0));
    127         InvalidateRect(hwnd, NULL, FALSE);
    128         return 0;
    129 
    130     case WM_PAINT:
    131         hdc = BeginPaint(hwnd, &ps);
    132 
    133         GetClientRect(hwnd, &rect);
    134         Rectangle(hdc, 0, 0, rect.right, rect.bottom);
    135 
    136         if (GetWindowLong(hwnd, 0))
    137         {
    138             MoveToEx(hdc, 0, 0, NULL);
    139             LineTo(hdc, rect.right, rect.bottom);
    140             MoveToEx(hdc, 0, rect.bottom, NULL);
    141             LineTo(hdc, rect.right, 0);
    142         }
    143 
    144         EndPaint(hwnd, &ps);
    145         return 0;
    146     }
    147 
    148     return DefWindowProc(hwnd, message, wParam, lParam);
    149 }
    

    CHECKER3.C

     

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