Win32API C语言 InputBox输入框实现

  1 #define ID_INPUTEDIT 1001
  2 #define ID_OK 1002
  3 
  4 BOOL closing = FALSE;
  5 HWND dialogHandle = 0;
  6 
  7 LRESULT CALLBACK inputBoxWndProc(HWND wndHandle, UINT message, WPARAM wParam, LPARAM lParam)
  8 {    
  9     static char **result = 0;
 10     static HWND inputHandle = 0;    
 11     
 12     switch (message)
 13     {
 14     case WM_NCCREATE:
 15         result = ((CREATESTRUCT *)lParam)->lpCreateParams;        
 16         break;
 17     
 18     case WM_CLOSE:
 19     case WM_DESTROY:
 20         closing = TRUE;
 21         dialogHandle = 0;
 22         PostQuitMessage(0);
 23         break;
 24     
 25     case WM_COMMAND:    
 26         int notifyCode = HIWORD(wParam);    
 27         int controlId = LOWORD(wParam);    
 28         HWND controlHandle = (HWND)lParam;
 29         
 30         switch (controlId)
 31         {
 32         case ID_INPUTEDIT:
 33             inputHandle = controlHandle;
 34             
 35             if (notifyCode == EN_UPDATE)
 36             {
 37                 if (*result == 0)
 38                     *result = malloc(256);
 39                 GetWindowText(inputHandle, *result, 256);
 40                 PostQuitMessage(0);
 41             }
 42             break;
 43             
 44         case ID_OK:
 45             SendMessage(wndHandle, WM_CLOSE, 0, 0);
 46             break;
 47         }
 48         break;
 49     }
 50     
 51     return DefWindowProc(wndHandle, message, wParam, lParam);
 52 }
 53 
 54 WNDCLASS wndClass; // 全局变量自动清0
 55 
 56 void inputbox_init(void)
 57 {
 58     wndClass.hCursor = LoadCursor(0, IDC_ARROW);
 59 //    WndClass.hIcon = LoadIcon(0, IDI_APPLICATION);
 60 //    wndClass.cbSize = sizeof wndClass;
 61     wndClass.style = CS_HREDRAW | CS_VREDRAW;
 62     wndClass.lpfnWndProc = inputBoxWndProc;
 63     wndClass.hbrBackground = (HBRUSH)COLOR_WINDOWFRAME;
 64     wndClass.lpszClassName = "InputBox";
 65     wndClass.hInstance = GetModuleHandle(0);
 66 
 67     RegisterClass(&wndClass);
 68 }
 69 
 70 HWND dialog_init(char *hint, char **result)
 71 {
 72 #define X 5
 73 #define OKBUTTON_WIDTH 75
 74 #define INPUTEDIT_WIDTH (width0 - OKBUTTON_WIDTH)
 75 #define INPUTEDIT_Y 29
 76 #define HINT_HEIGHT 24
 77 #define CHAR_WIDTH 8
 78     HWND dialogHandle, inputLabelHandle, inputHandle, okButtonHandle;
 79     
 80     int hint_width = strlen(hint) * CHAR_WIDTH,
 81         width0 = hint_width + OKBUTTON_WIDTH,
 82         height = HINT_HEIGHT + INPUTEDIT_Y + 50;
 83     
 84     dialogHandle = CreateWindow(
 85         wndClass.lpszClassName, "文本输入框的标题", WS_OVERLAPPEDWINDOW,
 86         100, 100, width0 + 50, height,
 87         0, 0, wndClass.hInstance, result);
 88 
 89     inputLabelHandle = CreateWindow(
 90         "STATIC", hint, WS_CHILD | WS_VISIBLE,
 91         X, 5, hint_width, HINT_HEIGHT,
 92         dialogHandle, 0, wndClass.hInstance, 0);
 93 
 94     inputHandle = CreateWindow(
 95         "EDIT", "", WS_BORDER | WS_CHILD | WS_VISIBLE,
 96         X, INPUTEDIT_Y, INPUTEDIT_WIDTH, 24,
 97         dialogHandle, (HMENU)ID_INPUTEDIT, wndClass.hInstance, 0);
 98 
 99     okButtonHandle = CreateWindow(
100         "BUTTON", "确定按钮", WS_CHILD | WS_VISIBLE,
101         X + INPUTEDIT_WIDTH + 5, INPUTEDIT_Y, OKBUTTON_WIDTH, 24,
102         dialogHandle, (HMENU)ID_OK, wndClass.hInstance, 0);
103     
104     return dialogHandle;
105 }
106 
107 char *inputbox(char *hint)
108 {
109     static char *result = 0;
110     MSG msg;
111     
112     if (dialogHandle == 0)
113     {
114         dialogHandle = dialog_init(hint, &result);
115         
116         if (dialogHandle == 0)
117             return 0;
118     }
119  
120     // 在桌面显示窗口
121     ShowWindow(dialogHandle, SW_SHOWNORMAL);
122  
123     // 刷新窗口客户区
124     // UpdateWindow(dialogHandle);
125  
126     while (GetMessage(&msg, 0, 0, 0))
127     {
128         TranslateMessage(&msg);
129         DispatchMessage(&msg);
130     }
131  
132     return result;
133 }