第四章 文本输出
1 //SYSMETS.H -- System metrics display structure 2 #include <Windows.h> 3 4 #define NUMLINES ((int) (sizeof(sysmetrics) / sizeof(sysmetrics[0]))) 5 6 struct 7 { 8 int iIndex; 9 TCHAR *szLabel; 10 TCHAR *szDesc; 11 } 12 sysmetrics[] = 13 { 14 SM_CXSCREEN, TEXT("SM_CXSCREEN"), TEXT("Screen width in pixels"), 15 SM_CYSCREEN, TEXT("SM_CYSCREEN"), TEXT("Screen height in pixels"), 16 SM_CXVSCROLL, TEXT("SM_CXVSCROLL"), TEXT("Vertical scroll width"), 17 SM_CYHSCROLL, TEXT("SM_CYHSCROLL"), TEXT("Horizontal scroll height"), 18 SM_CYCAPTION, TEXT("SM_CYCAPTION"), TEXT("Caption bar height"), 19 SM_CXBORDER, TEXT("SM_CXBORDER"), TEXT("Window border width"), 20 SM_CYBORDER, TEXT("SM_CYBORDER"), TEXT("Window border height"), 21 SM_CXFIXEDFRAME, TEXT("SM_CXFIXEDFRAME"), TEXT("Dialog window frame width"), 22 SM_CYFIXEDFRAME, TEXT("SM_CYFIXEDFRAME"), TEXT("Dialog window frame height"), 23 SM_CYVTHUMB, TEXT("SM_CYVTHUMB"), TEXT("Vertical scroll thumb height"), 24 SM_CXHTHUMB, TEXT("SM_CXHTHUMB"), TEXT("Horizontal scroll thumb width"), 25 SM_CXICON, TEXT("SM_CXICON"), TEXT("Icon width"), 26 SM_CYICON, TEXT("SM_CYICON"), TEXT("Icon height"), 27 SM_CXCURSOR, TEXT("SM_CXCURSOR"), TEXT("Cursor width"), 28 SM_CYCURSOR, TEXT("SM_CYCURSOR"), TEXT("Cursor height"), 29 SM_CYMENU, TEXT("SM_CYMENU"), TEXT("Menu bar height"), 30 SM_CXFULLSCREEN, TEXT("SM_CXFULLSCREEN"), TEXT("Full screen client area width"), 31 SM_CYFULLSCREEN, TEXT("SM_CYFULLSCREEN"), TEXT("Full screen client area height"), 32 SM_CYKANJIWINDOW, TEXT("SM_CYKANJIWINDOW"), TEXT("Kanji window height"), 33 SM_MOUSEPRESENT, TEXT("SM_MOUSEPRESENT"), TEXT("Mouse present flag"), 34 SM_CYVSCROLL, TEXT("SM_CYVSCROLL"), TEXT("Vertical scroll arrow height"), 35 SM_CXHSCROLL, TEXT("SM_CXHSCROLL"), TEXT("Horizontal scroll arrow width"), 36 SM_DEBUG, TEXT("SM_DEBUG"), TEXT("Debug version flag"), 37 SM_SWAPBUTTON, TEXT("SM_SWAPBUTTON"), TEXT("Mouse buttons swapped flag"), 38 SM_CXMIN, TEXT("SM_CXMIN"), TEXT("Minimum window width"), 39 SM_CYMIN, TEXT("SM_CYMIN"), TEXT("Minimum window height"), 40 SM_CXSIZE, TEXT("SM_CXSIZE"), TEXT("Min/Max/Close button width"), 41 SM_CYSIZE, TEXT("SM_CYSIZE"), TEXT("Min/Max/Close button height"), 42 SM_CXSIZEFRAME, TEXT("SM_CXSIZEFRAME"), TEXT("Window sizing frame width"), 43 SM_CYSIZEFRAME, TEXT("SM_CYSIZEFRAME"), TEXT("Window sizing frame height"), 44 SM_CXMINTRACK, TEXT("SM_CXMINTRACK"), TEXT("Minimum window tracking width"), 45 SM_CYMINTRACK, TEXT("SM_CYMINTRACK"), TEXT("Minimum window tracking height"), 46 SM_CXDOUBLECLK, TEXT("SM_CXDOUBLECLK"), TEXT("Double click x tolerance"), 47 SM_CYDOUBLECLK, TEXT("SM_CYDOUBLECLK"), TEXT("Double click y tolerance"), 48 SM_CXICONSPACING, TEXT("SM_CXICONSPACING"), TEXT("Horizontal icon spacing"), 49 SM_CYICONSPACING, TEXT("SM_CYICONSPACING"), TEXT("Vertical icon spacing"), 50 SM_MENUDROPALIGNMENT, TEXT("SM_MENUDROPALIGMENT"), TEXT("Left or right menu drop"), 51 SM_PENWINDOWS, TEXT("SM_PENWINDOWS"), TEXT("Pen extensions installed"), 52 SM_DBCSENABLED, TEXT("SM-DBCSENABLED"), TEXT("Double-Byte Char Set enable"), 53 SM_CMOUSEBUTTONS, TEXT("SM_CMOUSEBUTTONS"), TEXT("Number of mouse buttons"), 54 SM_SECURE, TEXT("SM_SECURE"), TEXT("Security present flag"), 55 SM_CXEDGE, TEXT("SM_CXEDGE"), TEXT("3-D border width"), 56 SM_CYEDGE, TEXT("SM_CYEDGE"), TEXT("3-D border height"), 57 SM_CXMINSPACING, TEXT("SM_CXMINSPACING"), TEXT("Minimized window spacing width"), 58 SM_CYMINSPACING, TEXT("SM-CYMINSPACING"), TEXT("Minimized window spacing height"), 59 SM_CXSMICON, TEXT("SM_CXSMICON"), TEXT("Small icon width"), 60 SM_CYSMICON, TEXT("SM_CYSMICON"), TEXT("Small icon height"), 61 SM_CYSMCAPTION, TEXT("SM_CYSMCAPTION"), TEXT("Small caption height"), 62 SM_CXSMSIZE, TEXT("SM_CXSMSIZE"), TEXT("Small caption button width"), 63 SM_CYSMSIZE, TEXT("SM_CYSMSIZE"), TEXT("Small caption button height"), 64 SM_CXMENUSIZE, TEXT("SM_CXMENUSIZE"), TEXT("Menu bar button width"), 65 SM_CYMENUSIZE, TEXT("SM_CYMENUSIZE"), TEXT("Menu bar button height"), 66 SM_ARRANGE, TEXT("SM_ARRANGE"), TEXT("How minimized windows arranged"), 67 SM_CXMINIMIZED, TEXT("SM_CXMINIMIZED"), TEXT("Minimized window width"), 68 SM_CYMINIMIZED, TEXT("SM_CYMINIMIZED"), TEXT("Minimized window height"), 69 SM_CXMAXTRACK, TEXT("SM_CXMAXTRACK"), TEXT("Maximum draggable width"), 70 SM_CYMAXTRACK, TEXT("SM_CYMAXTRACK"), TEXT("Maximum draggable height"), 71 SM_CXMAXIMIZED, TEXT("SM_CXMAXIMIZED"), TEXT("Width of maximized window"), 72 SM_CYMAXIMIZED, TEXT("SM_CYMAXIMIZED"), TEXT("Height of maximized windwo"), 73 SM_NETWORK, TEXT("SM_NETWORK"), TEXT("Network present flag"), 74 SM_CLEANBOOT, TEXT("SM_CLEANBOOT"), TEXT("How system was booted"), 75 SM_CXDRAG, TEXT("SM_CXDRAG"), TEXT("Avoid drag x tolerance"), 76 SM_CYDRAG, TEXT("SM_CYDRAG"), TEXT("Avoid drag x tolerance"), 77 SM_SHOWSOUNDS, TEXT("SM_SHOWSOUNDS"), TEXT("Present sounds visually"), 78 SM_CXMENUCHECK, TEXT("SM_CXMENUCHECK"), TEXT("Menu check-mark width"), 79 SM_CYMENUCHECK, TEXT("SM_CYMENUCHECK"), TEXT("Menu check-mark height"), 80 SM_SLOWMACHINE, TEXT("SM_SLOWMACHINE"), TEXT("Slow processor flag"), 81 SM_MIDEASTENABLED, TEXT("SM_MIDEASTENABLE"), TEXT("Hebrew and Arabic enabled flag"), 82 SM_MOUSEWHEELPRESENT, TEXT("SM_MOUSEWHEELPRESENT"), TEXT("Mouse wheel present flag"), 83 SM_XVIRTUALSCREEN, TEXT("SM_XVIRTUALSCREEN"), TEXT("Virtual screen x origin"), 84 SM_YVIRTUALSCREEN, TEXT("SM_YVIRTUALSCREEN"), TEXT("Virtual screen y origin"), 85 SM_CXVIRTUALSCREEN, TEXT("SM_CXVIRTUALSCREEN"), TEXT("Virtual screen width"), 86 SM_CYVIRTUALSCREEN, TEXT("SM_CYVIRTUALSCREEN"), TEXT("Virtual screen height"), 87 SM_CMONITORS, TEXT("SM_CMONITORS"), TEXT("Number of monitors"), 88 SM_SAMEDISPLAYFORMAT, TEXT("SM_SAMEDISPLAYFORMAT"), TEXT("Same color format flag") 89 };
1 //SYSMETS3.C--System Metrics Display Program No.3(c) Charles Petzold, 1998 2 #include <Windows.h> 3 #include "SYSMETS.h" 4 5 LRESULT CALLBACK WndPorc(HWND, UINT, WPARAM, LPARAM); 6 7 int WINAPI WinMain( __in HINSTANCE hInstance 8 , __in_opt HINSTANCE hPrevInstance 9 , __in LPSTR lpCmdLine 10 , __in int nShowCmd ) 11 { 12 static TCHAR szAppName[] = TEXT("Sysmets3"); 13 HWND hwnd; 14 MSG msg; 15 WNDCLASS wndclass; 16 17 wndclass.style = CS_HREDRAW | CS_VREDRAW; 18 wndclass.lpfnWndProc = WndPorc; 19 wndclass.cbClsExtra = 0; 20 wndclass.cbWndExtra = 0; 21 wndclass.hInstance = hInstance; 22 wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); 23 wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); 24 wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); 25 wndclass.lpszClassName = szAppName; 26 wndclass.lpszMenuName = NULL; 27 28 if (!RegisterClass(&wndclass)) 29 { 30 MessageBox(NULL, TEXT("Program requires windows NT!") 31 , szAppName, MB_ICONERROR); 32 return 0; 33 } 34 35 hwnd = CreateWindow(szAppName, TEXT("Get System Metrics No.3") 36 , WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL 37 , CW_USEDEFAULT, CW_USEDEFAULT 38 , CW_USEDEFAULT, CW_USEDEFAULT 39 , NULL, NULL, hInstance, NULL); 40 41 ShowWindow(hwnd, nShowCmd); 42 UpdateWindow(hwnd); 43 44 while (GetMessage(&msg, hwnd, 0, 0)) 45 { 46 TranslateMessage(&msg); 47 DispatchMessage(&msg); 48 } 49 50 return msg.wParam; 51 } 52 53 LRESULT CALLBACK WndPorc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 54 { 55 static int cxChar, cxCaps, cyChar, cxClient, cyClient, iMaxWidth; 56 HDC hdc; 57 int i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd; 58 PAINTSTRUCT ps; 59 SCROLLINFO si; 60 TCHAR szBuffer[10]; 61 TEXTMETRIC tm; 62 63 switch (message) 64 { 65 case WM_CREATE: 66 hdc = GetDC(hwnd); 67 GetTextMetrics(hdc, &tm); 68 cxChar = tm.tmAveCharWidth; 69 cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2; 70 cyChar = tm.tmHeight + tm.tmExternalLeading; 71 ReleaseDC(hwnd, hdc); 72 73 //save the width of the three columns 74 iMaxWidth = 40 * cxChar + 22 * cxCaps; 75 return 0; 76 77 case WM_SIZE: 78 cxClient = LOWORD(lParam); 79 cyClient = HIWORD(lParam); 80 81 //set vertical scroll bar range and page size 82 si.cbSize = sizeof(SCROLLINFO); 83 si.fMask = SIF_RANGE | SIF_PAGE; 84 si.nMin = 0; 85 si.nMax = NUMLINES - 1; 86 si.nPage = cyClient / cyChar; 87 SetScrollInfo(hwnd, SB_VERT, &si, TRUE); 88 89 //set horizontal scroll bar range and page size 90 si.cbSize = sizeof(SCROLLINFO); 91 si.fMask = SIF_RANGE | SIF_PAGE; 92 si.nMin = 0; 93 si.nMax = iMaxWidth / cxChar; 94 si.nPage = cxClient / cxChar; 95 SetScrollInfo(hwnd, SB_HORZ, &si, TRUE); 96 97 return 0; 98 99 case WM_VSCROLL: 100 //get all the vertical scroll bar information 101 si.cbSize = sizeof(SCROLLINFO); 102 si.fMask = SIF_ALL; 103 GetScrollInfo(hwnd, SB_VERT, &si); 104 105 //save the position for comparison later on 106 iVertPos = si.nPos; 107 108 switch (LOWORD(wParam)) 109 { 110 case SB_TOP: 111 si.nPos = si.nMin; 112 break; 113 case SB_BOTTOM: 114 si.nPos = si.nMax; 115 break; 116 case SB_LINEUP: 117 si.nPos -= 1; 118 break; 119 case SB_LINEDOWN: 120 si.nPos += 1; 121 break; 122 case SB_PAGEUP: 123 si.nPos -= si.nPage; 124 break; 125 case SB_PAGEDOWN: 126 si.nPos += si.nPage; 127 break; 128 case SB_THUMBTRACK: 129 si.nPos = si.nTrackPos; 130 break; 131 default: 132 break; 133 } 134 135 //set the position and then retrieve it. Due to adjustments 136 //by windows it may not be the same as the value set. 137 si.fMask = SIF_POS; 138 SetScrollInfo(hwnd, SB_VERT, &si, TRUE); 139 GetScrollInfo(hwnd, SB_VERT, &si); 140 141 //if the position has changed, scroll the window and update it 142 if (si.nPos != iVertPos) 143 { 144 ScrollWindow(hwnd, 0, cyChar * (iVertPos - si.nPos) 145 , NULL, NULL); 146 UpdateWindow(hwnd); 147 } 148 149 return 0; 150 151 case WM_HSCROLL: 152 //get all the vertical scroll bar information 153 si.cbSize = sizeof(SCROLLINFO); 154 si.fMask = SIF_ALL; 155 156 //save the position for comparison later on 157 GetScrollInfo(hwnd, SB_HORZ, &si); 158 iHorzPos = si.nPos; 159 160 switch (LOWORD(wParam)) 161 { 162 case SB_LINELEFT: 163 si.nPos -= 1; 164 break; 165 case SB_LINERIGHT: 166 si.nPos += 1; 167 break; 168 case SB_PAGELEFT: 169 si.nPos -= si.nPage; 170 break; 171 case SB_PAGERIGHT: 172 si.nPos += si.nPage; 173 case SB_THUMBPOSITION: 174 si.nPos = si.nTrackPos; 175 break; 176 default: 177 break; 178 } 179 180 //set the position and then retrieve it. Due to adjustments 181 //by windows it may not be the same as the value set. 182 si.fMask = SIF_POS; 183 SetScrollInfo(hwnd, SB_HORZ, &si, TRUE); 184 GetScrollInfo(hwnd, SB_HORZ, &si); 185 186 //if the position has changed, scroll the window 187 if (si.nPos != iHorzPos) 188 { 189 ScrollWindow(hwnd, cxChar * (iHorzPos - si.nPos) 190 , 0, NULL, NULL); 191 } 192 193 return 0; 194 195 case WM_PAINT: 196 hdc = BeginPaint(hwnd, &ps); 197 198 //get vertical scroll bar position 199 si.cbSize = sizeof(SCROLLINFO); 200 si.fMask = SIF_POS; 201 GetScrollInfo(hwnd, SB_VERT, &si); 202 iVertPos = si.nPos; 203 204 //get horizontal scroll bar position 205 GetScrollInfo(hwnd, SB_HORZ, &si); 206 iHorzPos = si.nPos; 207 208 //find painting limits 209 iPaintBeg = max(0, iVertPos + ps.rcPaint.top / cyChar); 210 iPaintEnd = min(NUMLINES - 1, iVertPos + ps.rcPaint.bottom / cyChar); 211 212 for (i = iPaintBeg; i <= iPaintEnd; ++i) 213 { 214 x = cxChar * (1 - iHorzPos); 215 y = cyChar * (i - iVertPos); 216 217 TextOut(hdc, x, y, sysmetrics[i].szLabel 218 , lstrlen(sysmetrics[i].szLabel)); 219 220 TextOut(hdc, x + 22 * cxCaps, y 221 , sysmetrics[i].szDesc, lstrlen(sysmetrics[i].szDesc)); 222 223 SetTextAlign(hdc, TA_RIGHT | TA_TOP); 224 225 TextOut(hdc, x + 22 * cxCaps + 40 * cxChar, y, szBuffer 226 , wsprintf(szBuffer, TEXT("%5d"), GetSystemMetrics(sysmetrics[i].iIndex))); 227 228 SetTextAlign(hdc, TA_LEFT | TA_TOP); 229 } 230 231 EndPaint(hwnd, &ps); 232 return 0; 233 234 case WM_DESTROY: 235 PostQuitMessage(0); 236 return 0; 237 } 238 239 return DefWindowProc(hwnd, message, wParam, lParam); 240 }
