> chapter 5 device.c

#include<windows.h> HDC hdc; TEXTMETRIC tm; PAINTSTRUCT ps ; int i; #define NUMLINES (int )(sizeof(devcaps)/sizeof (devcaps[0])) struct { int iIndex; TCHAR * szLable; TCHAR * szDesc; } devcaps[]={ HORZSIZE, TEXT ("HORZSIZE"),TEXT ("Width in millimeters:"), VERTSIZE, TEXT ("VERTSIZE"),TEXT ("Height in millimeters:"), HORZRES, TEXT ("HORZRES"), TEXT ("Width in pixels:"), VERTRES, TEXT ("VERTRES"), TEXT ("Height in raster lines:"), BITSPIXEL, TEXT ("BITSPIXEL"),TEXT ("Color bits per pixel:"), PLANES, TEXT ("PLANES"), TEXT ("Number of color planes:"), NUMBRUSHES, TEXT ("NUMBRUSHES"), TEXT ("Number of device brushes:"), NUMPENS, TEXT ("NUMPENS"), TEXT ("Number of device pens:"), NUMMARKERS, TEXT ("NUMMARKERS"), TEXT ("Number of device markers:"), NUMFONTS, TEXT ("NUMFONTS"), TEXT ("Number of device fonts:"), NUMCOLORS, TEXT ("NUMCOLORS"), TEXT ("Number of device colors:"), PDEVICESIZE, TEXT ("PDEVICESIZE"), TEXT ("Size of device structure:"), ASPECTX, TEXT ("ASPECTX"), TEXT ("Relative width of pixel:"), ASPECTY, TEXT ("ASPECTY"), TEXT ("Relative height of pixel:"), ASPECTXY, TEXT ("ASPECTXY"), TEXT ("Relative diagonal of pixel:"), LOGPIXELSX, TEXT ("LOGPIXELSX"), TEXT ("Horizontal dots per inch:"), LOGPIXELSY, TEXT ("LOGPIXELSY"), TEXT ("Vertical dots per inch:"), SIZEPALETTE, TEXT ("SIZEPALETTE"), TEXT ("Number of palette entries:"), NUMRESERVED, TEXT ("NUMRESERVED"), TEXT ("Reserved palette entries:"), COLORRES, TEXT ("COLORRES"), TEXT ("Actual color resolution:") }; LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int iShowCmd ) { HWND hwnd; MSG msg; static TCHAR szAppName[]=TEXT("Device"); //design a window WNDCLASS wndcls; wndcls.cbClsExtra=0; wndcls.cbWndExtra=0; wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH); wndcls.hCursor=LoadCursor(NULL,IDC_APPSTARTING); wndcls.hIcon=LoadIcon(NULL,IDI_APPLICATION); wndcls.hInstance=hInstance; wndcls.lpfnWndProc=WndProc; wndcls.lpszClassName=szAppName; wndcls.lpszMenuName=NULL;//? wndcls.style=CS_HREDRAW | CS_VREDRAW; //register a window RegisterClass(&wndcls); //creat a window hwnd=CreateWindow( szAppName,TEXT("DEVICE"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL ); //show and update ShowWindow(hwnd,iShowCmd); UpdateWindow(hwnd); //loop while(GetMessage(&msg,NULL,0,0)){ TranslateMessage(& msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { static int cxChar,cxCaps,cyChar; TCHAR szBuffer[10]; switch(message){ case WM_CREATE: hdc=GetDC(hwnd); GetTextMetrics (hdc, &tm) ; cxChar = tm.tmAveCharWidth ; cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ; cyChar = tm.tmHeight + tm.tmExternalLeading ; ReleaseDC(hwnd,hdc); return 0; case WM_PAINT: hdc=BeginPaint(hwnd,&ps); // TCHAR * szLable; //TCHAR * szDesc; for(i=0;i<NUMLINES;++i){ TextOut(hdc,0,cyChar * i,devcaps[i].szLable,/ lstrlen(devcaps[i].szLable)); TextOut(hdc,14*cxCaps,cyChar * i,devcaps[i].szDesc,/ lstrlen(devcaps[i].szDesc)); SetTextAlign (hdc, TA_RIGHT | TA_TOP) ; TextOut (hdc, 14*cxCaps+35*cxChar, cyChar*i, szBuffer, wsprintf (szBuffer, TEXT ("%5d"), GetDeviceCaps (hdc, devcaps[i].iIndex))) ; SetTextAlign (hdc, TA_LEFT | TA_TOP) ; } EndPaint(hwnd,&ps); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd,message,wParam,lParam); }