08 Windows編程——畫圖

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源碼

  1 #include<Windows.h>  2 #include<tchar.h>  3 #include<stdio.h>  4 #define NUM 1000  5   6 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);  7   8 int WinMain(HINSTANCE hInst, HINSTANCE tmp, LPSTR szCmd, int nShow)  9 { 10     WNDCLASS WndClass; 11     TCHAR* ClassName = TEXT("MyClass"); 12     HWND hwnd; 13     MSG msg; 14     HBRUSH hBrush; 15  16     hBrush = CreateSolidBrush(RGB(0x20, 0x85, 0x41)); 17     WndClass.cbClsExtra = 0; 18     WndClass.cbWndExtra = 0; 19     WndClass.hbrBackground = hBrush; 20     WndClass.hCursor = LoadCursor(NULL, IDC_ARROW); 21     WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION); 22     WndClass.hInstance = hInst; 23     WndClass.lpfnWndProc = WindProc; 24     WndClass.lpszClassName = ClassName; 25     WndClass.lpszMenuName = NULL; 26     WndClass.style = CS_VREDRAW | CS_HREDRAW; 27  28     if (!RegisterClass(&WndClass)) 29     { 30         MessageBox(NULL, TEXT("Gegister Class Fail!!"), TEXT("error"), MB_OK); 31         return 0; 32     } 33  34     //WS_VSCROLL視窗捲軸 35     hwnd = CreateWindow(ClassName, TEXT("Hello"), WS_OVERLAPPEDWINDOW | WS_VSCROLL, 0, 0, 1000, 800, NULL, NULL, hInst, NULL); 36     if (hwnd == NULL) 37     { 38         MessageBox(NULL, TEXT("Create Window Fail!!"), TEXT("error"), MB_OK); 39         return 0; 40     } 41     ShowWindow(hwnd, nShow); 42     UpdateWindow(hwnd); 43  44     while (GetMessage(&msg, NULL, 0, 0)) 45     { 46         TranslateMessage(&msg); 47         DispatchMessage(&msg); 48     } 49  50     return 0; 51 } 52  53 LRESULT CALLBACK WindProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 54 { 55     HDC hdc; 56     static HPEN hPen1,hPen2; 57     static HBRUSH hBrush; 58     PAINTSTRUCT pt; 59     TEXTMETRIC ts; 60     TCHAR buf[1024]; 61     int i;                //行數 62     static int cyChar;    //字型大小 63     static int cy;        //客戶區高度 64     static SCROLLINFO si; 65     static int position = 0; 66     switch (message) 67     { 68     case WM_CREATE: 69         hdc = GetDC(hwnd); 70         hBrush = CreateSolidBrush(RGB(249, 98, 241)); 71         hPen1 = CreatePen(PS_SOLID,100, RGB(0, 0, 255)); 72         GetTextMetrics(hdc, &ts); 73         ReleaseDC(hwnd, hdc); 74         cyChar = ts.tmHeight; 75         si.cbSize = sizeof(si); 76         return 0; 77     case WM_SIZE: 78         //視窗高度 79         cy = HIWORD(lParam); 80         si.fMask = SIF_ALL; 81         si.nMax = NUM - 1; 82         si.nMin = 0; 83         si.nPage = cy / cyChar; 84         si.nPos = position; 85         si.nTrackPos = 0; 86         SetScrollInfo(hwnd, SB_VERT, &si, TRUE); 87     case WM_VSCROLL: 88         //當捲軸是視窗的一部分時，可以忽略IParam參數 89         switch (LOWORD(wParam)) 90         { 91         case SB_BOTTOM: 92             si.nPos = si.nMax; 93             break; 94         case SB_LINEDOWN: 95             si.nPos++; 96             break; 97         case SB_LINEUP: 98             si.nPos--; 99             break;100         case SB_PAGEDOWN:101             si.nPos = si.nPos + cy / cyChar;102             break;103         case SB_PAGEUP:104             si.nPos = si.nPos - cy / cyChar;105             break;106         case SB_THUMBPOSITION:107             si.nPos = HIWORD(wParam);108             break;109         default:110             break;111         }112         si.fMask = SIF_POS;113         SetScrollInfo(hwnd, SB_VERT, &si, TRUE);114         GetScrollBarInfo(hwnd, SB_VERT, &si);115         position = si.nPos;116         //UpdateWindow(hwnd);//視窗必須有無效區，否則重新整理也是白刷。替換為InvalidateRect強制重新整理117         //InvalidateRect函數會產生WM_PAINT訊息118         InvalidateRect(hwnd, NULL, FALSE);119         return 0;120     case WM_PAINT:121         GetScrollBarInfo(hwnd, SB_VERT, &si);122         //調用BeginPaint後整個客戶去都是有效。ValidateRect使客戶區中任意矩形地區變成有效123         hdc = BeginPaint(hwnd, &pt);124         hPen2=(HPEN)SelectObject(hdc, hPen1);125         SelectObject(hdc, hBrush);126         MoveToEx(hdc, 500, 100, NULL);127         LineTo(hdc, 100, 100);128         Rectangle(hdc, 500, 50, 200, 200);129         SelectObject(hdc, hPen2);130 131         for (i = 0; i < NUM; i++)132         {133             _stprintf(buf, TEXT("---------------%d--------------"), si.nPos + i);134             TextOut(hdc, 0, i * cyChar, buf, _tcslen(buf));135         }136         EndPaint(hwnd, &pt);137         return 0;138     case WM_DESTROY:139         PostQuitMessage(0);//發送WM_QUIT訊息140         return 0;141     default:142         break;143     }144 145     return DefWindowProc(hwnd, message, wParam, lParam);146 }

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08 Windows編程——畫圖