第七章 鼠标（CHECKER3）

 /*---------------------------------------------

 CHECKER3.C -- Mouse Hit-Test Demo Program No.3

               (c) Charles Petzold, 1998

 ---------------------------------------------*/

 #include <Windows.h>

 #define DIVISIONS 5

 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

 LRESULT CALLBACK ChildWndProc(HWND, UINT, WPARAM, LPARAM);

 TCHAR szChildClass[] = TEXT("Checker3_Child");

 int WINAPI WinMain( __in HINSTANCE hInstance

                     , __in_opt HINSTANCE hPrevInstance

                     , __in LPSTR lpCmdLine

                     , __in int nShowCmd )

 {

     static TCHAR szAppName[] = TEXT("Checker3");

     HWND hwnd;

     MSG msg;

     WNDCLASS wndclass;

     wndclass.style = CS_HREDRAW | CS_VREDRAW;

     wndclass.lpfnWndProc = WndProc;

     wndclass.cbClsExtra = ;

     wndclass.cbWndExtra = ;

     wndclass.hInstance = hInstance;

     wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);

     wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

     wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

     wndclass.lpszMenuName = NULL;

     wndclass.lpszClassName = szAppName;

     if (!RegisterClass(&wndclass))

     {

         MessageBox(NULL, TEXT("Program requires Windows NT!")

             , szAppName, MB_ICONERROR);

         return ;

     }

     wndclass.lpfnWndProc = ChildWndProc;

     wndclass.cbWndExtra = sizeof(long);

     wndclass.hIcon = NULL;

     wndclass.lpszClassName = szChildClass;

     RegisterClass(&wndclass);

     hwnd = CreateWindow(szAppName, TEXT("Checker3 Mouse Hit-Test Demo")

         , WS_OVERLAPPEDWINDOW

         , CW_USEDEFAULT, CW_USEDEFAULT

         , CW_USEDEFAULT, CW_USEDEFAULT

         , NULL, NULL, hInstance, NULL);

     ShowWindow(hwnd, nShowCmd);

     UpdateWindow(hwnd);

     while (GetMessage(&msg, NULL, , ))

     {

         TranslateMessage(&msg);

         DispatchMessage(&msg);

     }

     return msg.wParam;

 }

 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

 {

     static HWND hwndChild[DIVISIONS][DIVISIONS];

     int cxBlock, cyBlock, x, y;

     switch (message)

     {

     case WM_CREATE:

         for (x = ; x != DIVISIONS; ++x)

             for (y = ; y != DIVISIONS; ++y)

             {

                 hwndChild[x][y] = CreateWindow(szChildClass, NULL

                     , WS_CHILDWINDOW | WS_VISIBLE

                     , , , ,

                     , hwnd, (HMENU)(y <<  | x)

                     , (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE)

                     , NULL);

             }

         return ;

     case WM_SIZE:

         cxBlock = LOWORD(lParam) / DIVISIONS;

         cyBlock = HIWORD(lParam) / DIVISIONS;

         for (x = ; x != DIVISIONS; ++x)

             for(y = ; y != DIVISIONS; ++y)

             {

                 MoveWindow(hwndChild[x][y]

                     , x * cxBlock, y * cyBlock

                     , cxBlock, cyBlock, TRUE);

             }

         return ;

     case WM_LBUTTONDOWN:

         MessageBeep();

         return ;

     case WM_DESTROY:

         PostQuitMessage();

         return ;

     }

     return DefWindowProc(hwnd, message, wParam, lParam);

 }

 LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

 {

     HDC hdc;

     PAINTSTRUCT ps;

     RECT rect;

     switch (message)

     {

     case WM_CREATE:

         SetWindowLong(hwnd, , );    // on/off flag

         return ;

     case WM_LBUTTONDOWN:

         SetWindowLong(hwnd, ,  ^ GetWindowLong(hwnd, ));

         InvalidateRect(hwnd, NULL, FALSE);

         return ;

     case WM_PAINT:

         hdc = BeginPaint(hwnd, &ps);

         GetClientRect(hwnd, &rect);

         Rectangle(hdc, , , rect.right, rect.bottom);

         if (GetWindowLong(hwnd, ))

         {

             MoveToEx(hdc, , , NULL);

             LineTo(hdc, rect.right, rect.bottom);

             MoveToEx(hdc, , rect.bottom, NULL);

             LineTo(hdc, rect.right, );

         }

         EndPaint(hwnd, &ps);

         return ;

     }

     return DefWindowProc(hwnd, message, wParam, lParam);

 }

CHECKER3.C