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澳门新葡4473网站第五章 绘图基础(DEVCAPS1)

发布时间:2019-10-11 03:51编辑:澳门新葡4473网站浏览(166)

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      1 //DEVCAPS1.C--Device Capabilities Display Program No.1 (c) Charles Petzold, 1998
      2 #include <Windows.h>
      3 
      4 #define NUMLINES ((int) (sizeof(devcaps) / sizeof(devcaps[0])))
      5 struct  
      6 {
      7     int iIndex;
      8     TCHAR *szLabel;
      9     TCHAR *szDesc;
     10 }
     11 devcaps[] =
     12 {
     13     HORZSIZE,        TEXT("HORZSIZE"),        TEXT("Width in millimeters:"),
     14     VERTSIZE,        TEXT("VERTSIZE"),        TEXT("Height in milimeters:"),
     15     HORZRES,        TEXT("HORZRES"),        TEXT("Width in pixels:"),
     16     VERTRES,        TEXT("VERTRES"),        TEXT("Height in raster lines:"),
     17     BITSPIXEL,        TEXT("BITSPIXEL"),        TEXT("Color bits per pixel:"),
     18     PLANES,            TEXT("PLANES"),            TEXT("Number of color planes:"),
     19     NUMBRUSHES,        TEXT("NUMBRUSHES"),        TEXT("Number of device brushes"),
     20     NUMPENS,        TEXT("NUMPENS"),        TEXT("Number of device pens:"),
     21     NUMMARKERS,        TEXT("NUMMARKERS"),        TEXT("Number of device markers:"),
     22     NUMFONTS,        TEXT("NUMFONTS"),        TEXT("Number of device fonts:"),
     23     NUMCOLORS,        TEXT("NUMCOLORS"),        TEXT("Number of device colors:"),
     24     PDEVICESIZE,    TEXT("PDEVICESIZE"),    TEXT("Size of device structure:"),
     25     ASPECTX,        TEXT("ASPECTX"),        TEXT("Relative width of pixel:"),
     26     ASPECTY,        TEXT("ASPECTY"),        TEXT("Relative height of pixel:"),
     27     ASPECTXY,        TEXT("ASPECTXY"),        TEXT("Relative diagonal of pixel:"),
     28     LOGPIXELSX,        TEXT("LOGPIXELSX"),        TEXT("Horizontal dots per inch:"),
     29     LOGPIXELSY,        TEXT("LOGPIXELSY"),        TEXT("Vertical dots per inch:"),
     30     SIZEPALETTE,    TEXT("SIZEPALETTE"),    TEXT("Number of palette entries:"),
     31     NUMRESERVED,    TEXT("NUMRESERVED"),    TEXT("Reserved palette entries:"),
     32     COLORRES,        TEXT("COLORRES"),        TEXT("Actual color resolution:")
     33 };
     34 
     35 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
     36 
     37 int WINAPI WinMain( __in HINSTANCE hInstance
     38                     , __in_opt HINSTANCE hPrevInstance
     39                     , __in LPSTR lpCmdLine
     40                     , __in int nShowCmd )
     41 {
     42     static TCHAR szAppName[] = TEXT("DevCaps1");
     43     HWND hwnd;
     44     MSG msg;
     45     WNDCLASS wndclass;
     46 
     47     wndclass.style = CS_HREDRAW | CS_VREDRAW;
     48     wndclass.lpfnWndProc = WndProc;
     49     wndclass.cbClsExtra = 0;
     50     wndclass.cbWndExtra = 0;
     51     wndclass.hInstance = hInstance;
     52     wndclass.hIcon= LoadIcon(NULL, IDI_APPLICATION);
     53     wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
     54     wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
     55     wndclass.lpszMenuName = NULL;
     56     wndclass.lpszClassName = szAppName;
     57 
     58     if (!RegisterClass(&wndclass))
     59     {
     60         MessageBox(NULL, TEXT("This program requires Window NT!")
     61             , szAppName, MB_ICONERROR);
     62         return 0;
     63     }
     64 
     65     hwnd = CreateWindow(szAppName, TEXT("Device Capabilities")
     66         , WS_OVERLAPPEDWINDOW
     67         , CW_USEDEFAULT, CW_USEDEFAULT
     68         , CW_USEDEFAULT, CW_USEDEFAULT
     69         , NULL, NULL, hInstance, NULL);
     70 
     71     ShowWindow(hwnd, nShowCmd);
     72     UpdateWindow(hwnd);
     73 
     74     while (GetMessage(&msg, NULL, 0, 0))
     75     {
     76         TranslateMessage(&msg);
     77         DispatchMessage(&msg);
     78     }
     79 
     80     return msg.wParam;
     81 }
     82 
     83 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
     84 {
     85     static int cxChar, cxCaps, cyChar;
     86     TCHAR szBuffer[10];
     87     HDC hdc;
     88     int i;
     89     PAINTSTRUCT ps;
     90     TEXTMETRIC tm;
     91 
     92     switch (message)
     93     {
     94     case WM_CREATE:
     95         hdc = GetDC(hwnd);
     96         GetTextMetrics(hdc, &tm);
     97         cxChar = tm.tmAveCharWidth;
     98         cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;
     99         cyChar = tm.tmHeight + tm.tmExternalLeading;
    100         ReleaseDC(hwnd, hdc);
    101         return 0;
    102 
    103     case WM_PAINT:
    104         hdc = BeginPaint(hwnd, &ps);
    105         for (i = 0; i != NUMLINES; ++i)
    106         {
    107             TextOut(hdc, 0, cyChar * i, devcaps[i].szLabel
    108                 , lstrlen(devcaps[i].szLabel));
    109             TextOut(hdc, 14 * cxCaps, cyChar * i, devcaps[i].szDesc
    110                 , lstrlen(devcaps[i].szDesc));
    111             SetTextAlign(hdc, TA_RIGHT | TA_TOP);
    112             TextOut(hdc, 14 * cxCaps + 35 * cxChar, cyChar * i, szBuffer
    113                 , wsprintf(szBuffer, TEXT("%5d"), GetDeviceCaps(hdc, devcaps[i].iIndex)));
    114             SetTextAlign(hdc, TA_LEFT | TA_TOP);
    115         }
    116         EndPaint(hwnd, &ps);
    117         return 0;
    118 
    119     case WM_DESTROY:
    120         PostQuitMessage(0);
    121         return 0;
    122     }
    123 
    124     return DefWindowProc(hwnd, message, wParam, lParam);
    125 }
    

    DEVCAPS1.C

     

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