带垂直和水平滚动条的系统度量展示程序
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/*---------------------------------------------------- sysmets.h -- system metrics display structure ----------------------------------------------------*/ #define NUMLINES ((int) (sizeof sysmetrics / sizeof sysmetrics[0])) struct { int iIndex; TCHAR* szLabel; TCHAR* szDesc; } sysmetrics[]= { SM_CXSCREEN, TEXT("SM_CXSCREEN"), TEXT("Screen width in pixels"), SM_CYSCREEN, TEXT("SM_CYSCREEN"), TEXT("Screen height in pixels"), SM_CXVSCROLL, TEXT("SM_CXVSCROLL"), TEXT("Vertical scroll width"), SM_CYHSCROLL, TEXT("SM_CYHSCROLL"), TEXT("Horizontal scroll height"), SM_CYCAPTION, TEXT("SM_CYCAPTION"), TEXT("Caption bar height"), SM_CXBORDER, TEXT("SM_CXBORDER"), TEXT("Window border width"), SM_CYBORDER, TEXT("SM_CYBORDER"), TEXT("Window border height"), SM_CXFIXEDFRAME, TEXT("SM_CXFIXEDFRAME"), TEXT("Dialog window frame width"), SM_CYFIXEDFRAME, TEXT("SM_CYFIXEDFRAME"), TEXT("Dialog window frame height"), SM_CYVTHUMB, TEXT("SM_CYVTHUMB"), TEXT("Vertical scroll thumb height"), SM_CXHTHUMB, TEXT("SM_CXHTHUMB"), TEXT("Horizontal scroll thumb width"), SM_CXICON, TEXT("SM_CXICON"), TEXT("Icon width"), SM_CYICON, TEXT("SM_CYICON"), TEXT("Icon height"), SM_CXCURSOR, TEXT("SM_CXCURSOR"), TEXT("Cursor width"), SM_CYCURSOR, TEXT("SM_CYCURSOR"), TEXT("Cursor height"), SM_CYMENU, TEXT("SM_CYMENU"), TEXT("Menu bar height"), SM_CXFULLSCREEN, TEXT("SM_CXFULLSCREEN"), TEXT("Full screen client area width"), SM_CYFULLSCREEN, TEXT("SM_CYFULLSCREEN"), TEXT("Full screen client area height"), SM_CYKANJIWINDOW, TEXT("SM_CYKANJIWINDOW"), TEXT("Kanji window height"), SM_MOUSEPRESENT, TEXT("SM_MOUSEPRESENT"), TEXT("Mouse present flag"), SM_CYVSCROLL, TEXT("SM_CYVSCROLL"), TEXT("Vertical scroll arrow height"), SM_CXHSCROLL, TEXT("SM_CXHSCROLL"), TEXT("Horizontal scroll arrow width"), SM_DEBUG, TEXT("SM_DEBUG"), TEXT("Debug version flag"), SM_SWAPBUTTON, TEXT("SM_SWAPBUTTON"), TEXT("Mouse buttons swapped flag"), SM_CXMIN, TEXT("SM_CXMIN"), TEXT("Minimum window width"), SM_CYMIN, TEXT("SM_CYMIN"), TEXT("Minimum window height"), SM_CXSIZE, TEXT("SM_CXSIZE"), TEXT("Min/Max/Close button width"), SM_CYSIZE, TEXT("SM_CYSIZE"), TEXT("Min/Max/Close button height"), SM_CXSIZEFRAME, TEXT("SM_CXSIZEFRAME"), TEXT("Window sizing frame width"), SM_CYSIZEFRAME, TEXT("SM_CYSIZEFRAME"), TEXT("Window sizing frame height"), SM_CXMINTRACK, TEXT("SM_CXMINTRACK"), TEXT("Minimum window tracking width"), SM_CYMINTRACK, TEXT("SM_CYMINTRACK"), TEXT("Minimum window tracking height"), SM_CXDOUBLECLK, TEXT("SM_CXDOUBLECLK"), TEXT("Double click x tolerance"), SM_CYDOUBLECLK, TEXT("SM_CYDOUBLECLK"), TEXT("Double click y tolerance"), SM_CXICONSPACING, TEXT("SM_CXICONSPACING"), TEXT("Horizontal icon spacing"), SM_CYICONSPACING, TEXT("SM_CYICONSPACING"), TEXT("Vertical icon spacing"), SM_MENUDROPALIGNMENT, TEXT("SM_MENUDROPALIGNMENT"), TEXT("Left or right menu drop"), SM_PENWINDOWS, TEXT("SM_PENWINDOWS"), TEXT("Pen extensions installed"), SM_DBCSENABLED, TEXT("SM_DBCSENABLED"), TEXT("Double-Byte Char Set enabled"), SM_CMOUSEBUTTONS, TEXT("SM_CMOUSEBUTTONS"), TEXT("Number of mouse buttons"), SM_SECURE, TEXT("SM_SECURE"), TEXT("Security present flag"), SM_CXEDGE, TEXT("SM_CXEDGE"), TEXT("3-D border width"), SM_CYEDGE, TEXT("SM_CYEDGE"), TEXT("3-D border height"), SM_CXMINSPACING, TEXT("SM_CXMINSPACING"), TEXT("Minimized window spacing width"), SM_CYMINSPACING, TEXT("SM_CYMINSPACING"), TEXT("Minimized window spacing height"), SM_CXSMICON, TEXT("SM_CXSMICON"), TEXT("Small icon width"), SM_CYSMICON, TEXT("SM_CYSMICON"), TEXT("Small icon height"), SM_CYSMCAPTION, TEXT("SM_CYSMCAPTION"), TEXT("Small caption height"), SM_CXSMSIZE, TEXT("SM_CXSMSIZE"), TEXT("Small caption button width"), SM_CYSMSIZE, TEXT("SM_CYSMSIZE"), TEXT("Small caption button height"), SM_CXMENUSIZE, TEXT("SM_CXMENUSIZE"), TEXT("Menu bar button width"), SM_CYMENUSIZE, TEXT("SM_CYMENUSIZE"), TEXT("Menu bar button height"), SM_ARRANGE, TEXT("SM_ARRANGE"), TEXT("How minimized windows arranged"), SM_CXMINIMIZED, TEXT("SM_CXMINIMIZED"), TEXT("Minimized window width"), SM_CYMINIMIZED, TEXT("SM_CYMINIMIZED"), TEXT("Minimized window height"), SM_CXMAXTRACK, TEXT("SM_CXMAXTRACK"), TEXT("Maximum draggable width"), SM_CYMAXTRACK, TEXT("SM_CYMAXTRACK"), TEXT("Maximum draggable height"), SM_CXMAXIMIZED, TEXT("SM_CXMAXIMIZED"), TEXT("Width of maximized window"), SM_CYMAXIMIZED, TEXT("SM_CYMAXIMIZED"), TEXT("Height of maximized window"), SM_NETWORK, TEXT("SM_NETWORK"), TEXT("Network present flag"), SM_CLEANBOOT, TEXT("SM_CLEANBOOT"), TEXT("How system was booted"), SM_CXDRAG, TEXT("SM_CXDRAG"), TEXT("Avoid drag x tolerance"), SM_CYDRAG, TEXT("SM_CYDRAG"), TEXT("Avoid drag y tolerance"), SM_SHOWSOUNDS, TEXT("SM_SHOWSOUNDS"), TEXT("Present sounds visually"), SM_CXMENUCHECK, TEXT("SM_CXMENUCHECK"), TEXT("Menu check-mark width"), SM_CYMENUCHECK, TEXT("SM_CYMENUCHECK"), TEXT("Menu check-mark height"), SM_SLOWMACHINE, TEXT("SM_SLOWMACHINE"), TEXT("Slow processor flag"), SM_MIDEASTENABLED, TEXT("SM_MIDEASTENABLED"), TEXT("Hebrew and Arabic enabled flag"), SM_MOUSEWHEELPRESENT, TEXT("SM_MOUSEWHEELPRESENT"), TEXT("Mouse wheel present flag"), SM_XVIRTUALSCREEN, TEXT("SM_XVIRTUALSCREEN"), TEXT("Virtual screen x origin"), SM_YVIRTUALSCREEN, TEXT("SM_YVIRTUALSCREEN"), TEXT("Virtual screen y origin"), SM_CXVIRTUALSCREEN, TEXT("SM_CXVIRTUALSCREEN"), TEXT("Virtual screen width"), SM_CYVIRTUALSCREEN, TEXT("SM_CYVIRTUALSCREEN"), TEXT("Virtual screen height"), SM_CMONITORS, TEXT("SM_CMONITORS"), TEXT("Number of monitors"), SM_SAMEDISPLAYFORMAT, TEXT("SM_SAMEDISPLAYFORMAT"), TEXT("Same color format flag") };
/*-------------------------------------- system metrics display program no.3 --------------------------------------*/ #include <windows.h> #include "sysmets.h" LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); int max(int iLeftParam, int iRightParam) { return iLeftParam > iRightParam ? iLeftParam : iRightParam; } int min(int iLeftParam, int iRightParam) { return iLeftParam < iRightParam ? iLeftParam : iRightParam; } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT("SysMets3"); HWND hwnd; MSG msg; WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR); return 0; } hwnd = CreateWindow(szAppName, TEXT("Get System Metrics NO.3"), WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); ShowWindow(hwnd,iCmdShow); UpdateWindow(hwnd); 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, cxClient, cyClient, iMaxWidth; HDC hdc; int i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd; PAINTSTRUCT ps; SCROLLINFO si; TCHAR szBuffer[10]; TEXTMETRIC tm; 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); //save the width of the three columns iMaxWidth = 40*cxChar+22*cxCaps; return 0; case WM_SIZE: cxClient = LOWORD(lParam); cyClient = HIWORD(lParam); //set vertical scroll bar range and page size si.cbSize = sizeof(si); si.fMask = SIF_RANGE | SIF_PAGE; si.nMin = 0; si.nMax = NUMLINES-1; si.nPage = cyClient/cyChar; SetScrollInfo(hwnd, SB_VERT, &si, TRUE); //set horizontal scroll bar range and page size si.cbSize = sizeof(si); si.fMask = SIF_RANGE | SIF_PAGE; si.nMin = 0; si.nMax = 2+iMaxWidth/cxChar; si.nPage = cxClient/cxChar; SetScrollInfo(hwnd, SB_HORZ, &si, TRUE); return 0; case WM_VSCROLL: //get all the vertical scroll bar information si.cbSize = sizeof(si); si.fMask = SIF_ALL; GetScrollInfo(hwnd, SB_VERT, &si); //save the position for comparison later on iVertPos = si.nPos; switch(LOWORD(wParam)) { case SB_TOP: si.nPos = si.nMin; break; case SB_BOTTOM: si.nPos = si.nMax; break; case SB_LINEUP: si.nPos -= 1; break; case SB_LINEDOWN: si.nPos += 1; break; case SB_PAGEUP: si.nPos -= si.nPage; break; case SB_PAGEDOWN: si.nPos += si.nPage; break; case SB_THUMBTRACK: si.nPos = si.nTrackPos; break; default: break; } //set the position and then retrieve it. Due to adjustments //by windows it may not be the same as the value set. si.fMask = SIF_POS; SetScrollInfo(hwnd, SB_VERT, &si, TRUE); GetScrollInfo(hwnd, SB_VERT, &si); //if the position has changed, scroll the window and update it if(si.nPos != iVertPos) { ScrollWindow(hwnd, 0, cyChar*(iVertPos-si.nPos), NULL, NULL); UpdateWindow(hwnd); } return 0;
case WM_HSCROLL: //get all the horizontal scroll bar information si.cbSize = sizeof(si); si.fMask = SIF_ALL; //save the position for comparison later on GetScrollInfo(hwnd, SB_HORZ, &si); iHorzPos = si.nPos; switch(LOWORD(wParam)) { case SB_LINELEFT: si.nPos -= 1; break; case SB_LINERIGHT: si.nPos += 1; break; case SB_PAGELEFT: si.nPos -= si.nPage; break; case SB_PAGERIGHT: si.nPos += si.nPage; break; case SB_THUMBPOSITION: si.nPos = si.nTrackPos; break; default: break; } //set the position and then retrieve it. Due to adjustments //by windows it may not be the same as the value set. si.fMask = SIF_POS; SetScrollInfo(hwnd, SB_HORZ, &si, TRUE); GetScrollInfo(hwnd, SB_HORZ, &si); //if the position has changed, scroll the window if(si.nPos != iHorzPos) { ScrollWindow(hwnd, cxChar*(iHorzPos-si.nPos), 0, NULL, NULL); } return 0; case WM_PAINT: hdc = BeginPaint(hwnd, &ps); //get vertical scroll bar position si.cbSize = sizeof(si); si.fMask = SIF_POS; GetScrollInfo(hwnd, SB_VERT, &si); iVertPos = si.nPos; //get horizontal scroll bar position GetScrollInfo(hwnd, SB_HORZ, &si); iHorzPos = si.nPos; //Find painting limits iPaintBeg = max(0, iVertPos + ps.rcPaint.top/cyChar); iPaintEnd = min(NUMLINES-1, iVertPos + ps.rcPaint.bottom/cyChar); for(i = iPaintBeg; i <= iPaintEnd; i++) { x = cxChar * (1 - iHorzPos); y = cyChar * (i - iVertPos); TextOut(hdc, x, y, sysmetrics[i].szLabel, lstrlen(sysmetrics[i].szLabel)); TextOut(hdc, x+22*cxCaps, y, sysmetrics[i].szDesc, lstrlen(sysmetrics[i].szDesc)); SetTextAlign(hdc, TA_RIGHT | TA_TOP); TextOut(hdc, x+22*cxCaps+40*cxChar, y, szBuffer, wsprintf(szBuffer, TEXT("%5d"), GetSystemMetrics(sysmetrics[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); }
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