Windows键盘操作
Author：秋时残叶
Date：2018.01.01
《Windows程序设计》笔记
1.获取键的状态
//若被按下，iState为负
iState = GetKeyState(VK_SHIFT);//返回值最低位为1,与小灯保持一致
iState = GetKeyState(VK_CAPITAL); //CapsLock2.左右Shift键
GetKeyState(VK_LSHIFT);
GetKeyState(VK_RSHIFT);3.四类字符消息
非系统字符（来自WM_KEYDOWN）:
WM_CHAR
WM_DEADCHAR系统字符（来自WM_SYSKEYDOWN）：
WM_SYSCHAR
WM_DEADSYSCHAR4.
lParam：和产生此字符码的击键消息中的lParam一样。
wParam：不是虚拟键码，为ANSI或UNICODE字符码。
5. SysMets4
//sysmets.h
#pragma once
#include
#define NUMLINES ((int)(sizeof sysmetrics / sizeof sysmetrics[0]))struct
{int iIndex;TCHAR * szLabel;TCHAR * szDesc;
}
sysmetrics[] =
{SM_CXSCREEN, L"SM_CXSCREEN",L"Screen width in pixels",SM_CYSCREEN, L"SM_CYSCREEN",L"Screen height in pixels",SM_CXVSCROLL, L"SM_CXVSCROLL",L"Vertical scroll width",SM_CYHSCROLL, L"SM_CYHSCROLL",L"Horizontal scroll height",SM_CYCAPTION, L"SM_CYCAPTION",L"Caption bar height",SM_CXBORDER, L"SM_CXBORDER",L"Window border width",SM_CYBORDER, L"SM_CYBORDER",L"Window border height",SM_CXFIXEDFRAME, L"SM_CXFIXEDFRAME",L"Dialog window frame width",SM_CYFIXEDFRAME, L"SM_CYFIXEDFRAME",L"Dialog window frame height",SM_CYVTHUMB, L"SM_CYVTHUMB",L"Vertical scroll thumb height",SM_CXHTHUMB, L"SM_CXHTHUMB",L"Horizontal scroll thumb width",SM_CXICON, L"SM_CXICON",L"Icon width",SM_CYICON, L"SM_CYICON",L"Icon height",SM_CXCURSOR, L"SM_CXCURSOR",L"Cursor width",SM_CYCURSOR, L"SM_CYCURSOR",L"Cursor height",SM_CYMENU, L"SM_CYMENU",L"Menu bar height",SM_CXFULLSCREEN, L"SM_CXFULLSCREEN",L"Full screen client area width",SM_CYFULLSCREEN, L"SM_CYFULLSCREEN",L"Full screen client area height",SM_CYKANJIWINDOW, L"SM_CYKANJIWINDOW",L"Kanji window height",SM_MOUSEPRESENT, L"SM_MOUSEPRESENT",L"Mouse present flag",SM_CYVSCROLL, L"SM_CYVSCROLL",L"Vertical scroll arrow height",SM_CXHSCROLL, L"SM_CXHSCROLL",L"Horizontal scroll arrow width",SM_DEBUG, L"SM_DEBUG",L"Debug version flas",SM_SWAPBUTTON, L"SM_SWAPBUTTON",L"Mouse buttons swapped flag",SM_CXMIN, L"SM_CXMIN",L"Minimum window width",SM_CYMIN, L"SM_CYMIN",L"Mininmum window height",SM_CXSIZE, L"SM_CXSIZE",L"Min/Max/Close button width",SM_CYSIZE, L"SM_CYSIZE",L"Min/Max/Close button height",SM_CXSIZEFRAME, L"SM_CXSIZEFRAME",L"Window sizing frame width",SM_CYSIZEFRAME, L"SM_CYSIZEFRAME",L"Window sizing frame height",SM_CXMINTRACK, L"SM_CXMINTRACK",L"Minimum window tracking width",SM_CYMINTRACK, L"SM_CYMINTRACK",L"Minimum window tracking height",SM_CXDOUBLECLK, L"SM_CXDOUBLECLK",L"Double click x tolerance",SM_CYDOUBLECLK, L"SM_CYDOUBLECLK",L"Double click y tolerance",SM_CXICONSPACING, L"SM_CXICONSPACING",L"Horizontal icon spacing",SM_CYICONSPACING, L"SM_CYICONSPACING",L"Vertical icon spacing",SM_MENUDROPALIGNMENT, L"SM_MENUDROPALIGNMENT",L"Left or right menu drop",SM_PENWINDOWS, L"SM_PENWINDOWS",L"Pen extensions installed",SM_DBCSENABLED, L"SM_DBCSENABLED",L"Double-byte Char Set enabled",SM_SECURE, L"SM_SECURE",L"Security present flag",SM_CXEDGE, L"SM_CXEDGE",L"3 - D border width",SM_CYEDGE, L"SM_CYEDGE",L"3 - D border height",SM_CXMINSPACING, L"SM_CXMINSPACING",L"Minimized window spacing width",SM_CYMINSPACING, L"SM_CYMINSPACING",L"Minimized window spacing height",SM_CXSMICON, L"SM_CXSMICON",L"Small icon width",SM_CYSMICON, L"SM_CYSMICON",L"Small icon height",SM_CYSMCAPTION, L"SM_CYSMCAPTION",L"Small caption height",SM_CXSMSIZE, L"SM_CXSMSIZE",L"Small caption button width",SM_CYSMSIZE, L"SM_CYSMSIZE",L"Small caption button height",SM_CXMENUSIZE, L"SM_CXMENUSIZE",L"Menu bar button width",SM_CYMENUSIZE, L"SM_CYMENUSIZE",L"Menu bar button height",SM_ARRANGE, L"SM_ARRANGE",L"How minimized",SM_CXMINIMIZED, L"SM_CXMINIMIZED",L"Minimized window width",SM_CYMINIMIZED, L"SM_CYMINIMIZED",L"Minimized window height",SM_CXMAXTRACK, L"SM_CXMAXTRACK",L"Maximum draggable width",SM_CYMAXTRACK, L"SM_CYMAXTRACK",L"Maximum draggable height",SM_CXMAXIMIZED, L"SM_CXMAXIMIZED",L"Width of maximized window",SM_CYMAXIMIZED, L"SM_CYMAXIMIZED",L"Height of maximized window",SM_NETWORK, L"SM_NETWORK",L"Network present flag",SM_CLEANBOOT, L"SM_CLEANBOOT",L"How system was booted",SM_CXDRAG, L"SM_CXDRAG",L"Avoid drag x tolerance",SM_CYDRAG, L"SM_CYDRAG",L"Avoid drag y tolerance",SM_SHOWSOUNDS, L"SM_SHOWSOUNDS",L"Present sounds visually",SM_CXMENUCHECK, L"SM_CXMENUCHECK",L"Menu check-mark width",SM_CYMENUCHECK, L"SM_CYMENUCHECK",L"Menu check-mark height",SM_SLOWMACHINE, L"SM_SLOWMACHINE",L"Slow processor flag",SM_MIDEASTENABLED, L"SM_MIDEASTNABLED",L"Hebrew and Arabic enabled flag",SM_MOUSEWHEELPRESENT, L"SM_MOUSEWHEELPRESENT",L"Mouse wheel present flag",SM_XVIRTUALSCREEN, L"SM_XVIRTUALSCREEN",L"Virtual screen x origin",SM_YVIRTUALSCREEN, L"SM_YVIRTUALSCREEN",L"Virtual screen y origin",SM_CXVIRTUALSCREEN, L"SM_CXVIRTUALSCREEN",L"Virtual screen width",SM_CYVIRTUALSCREEN, L"SM_VYVIRTUALSCREEN",L"Virtual screen height",SM_CMONITORS, L"SM_CMONITORS",L"Number of monitors",SM_SAMEDISPLAYFORMAT, L"SM_SAMEDISPLAYFORMAT",L"Same color format flag"
}; //main.cpp
#include
#include "sysmets.h"LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{static TCHAR szAppName[] = L"SysMets4";HWND hWnd;WNDCLASS wndclass;MSG msg;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, L"This program requires Windows!", szAppName, MB_ICONERROR);return 0;}hWnd = CreateWindow(szAppName, L"Get System Metrics No. 1",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 uMsg, WPARAM wParam, LPARAM lParam)
{static int cxChar, cyChar, cxCaps, cyClient, cxClient, iMaxWidth;HDC hdc;int i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd;PAINTSTRUCT ps;SCROLLINFO si;TCHAR szBuffer[10];TEXTMETRIC tm;switch (uMsg){case WM_CREATE:hdc = GetDC(hWnd);GetTextMetrics(hdc, &tm); //获取字体尺寸cxChar = tm.tmAveCharWidth;cyChar = tm.tmHeight + tm.tmExternalLeading;cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2; //依据变宽还是等宽字体设置宽度ReleaseDC(hWnd, hdc);//SetScrollRange(hWnd, SB_VERT, 0, NUMLINES - 1, FALSE); //设定范围//SetScrollPos(hWnd, SB_VERT, iVscrollPos, TRUE); //设定初始位置iMaxWidth = 40 * cxChar + 22 * cxCaps;return 0;case WM_SIZE:cxClient = LOWORD(lParam);cyClient = HIWORD(lParam);//设置垂直滚动条范围和页面大小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);//设置水平滚动条范围和页面大小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:si.cbSize = sizeof(si);si.fMask = SIF_ALL;GetScrollInfo(hWnd, SB_VERT, &si); //获取滚动条信息iVertPos = si.nPos; //当前位置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;default:break;}si.fMask = SIF_POS;SetScrollInfo(hWnd, SB_VERT, &si, TRUE);GetScrollInfo(hWnd, SB_VERT, &si);if (si.nPos != iVertPos) //若当前位置 != 先前位置，则滚动窗口{ScrollWindow(hWnd, 0, cyChar * (iVertPos - si.nPos), NULL, NULL);UpdateWindow(hWnd);}return 0;case WM_HSCROLL:si.cbSize = sizeof(si);si.fMask = SIF_ALL;GetScrollInfo(hWnd, SB_HORZ, &si); //获取滚动条信息iHorzPos = si.nPos; //保存当前位置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;}si.fMask = SIF_POS;SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);GetScrollInfo(hWnd, SB_HORZ, &si);//如果位置变化，滚动窗口if (si.nPos != iHorzPos){ScrollWindow(hWnd, cxChar * (iHorzPos - si.nPos), 0, NULL, NULL);}return 0;case WM_KEYDOWN:switch (wParam){case VK_HOME:SendMessage(hWnd, WM_VSCROLL, SB_TOP, 0);break;case VK_END:SendMessage(hWnd, WM_VSCROLL, SB_BOTTOM, 0);break;case VK_PRIOR:SendMessage(hWnd, WM_VSCROLL, SB_PAGEUP, 0);break;case VK_NEXT:SendMessage(hWnd, WM_VSCROLL, SB_PAGEDOWN, 0);break;case VK_UP:SendMessage(hWnd, WM_VSCROLL, SB_LINEUP, 0);break;case VK_DOWN:SendMessage(hWnd, WM_VSCROLL, SB_LINEDOWN, 0);break;case VK_LEFT:SendMessage(hWnd, WM_VSCROLL, SB_PAGEUP, 0);break;case VK_RIGHT:SendMessage(hWnd, WM_VSCROLL, SB_PAGEDOWN, 0);break;}return 0;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);//获取垂直滚动条位置si.cbSize = sizeof(si);si.fMask = SIF_POS;GetScrollInfo(hWnd, SB_VERT, &si);iVertPos = si.nPos;//获取水平滚动条位置GetScrollInfo(hWnd, SB_HORZ, &si);iHorzPos = si.nPos;iPaintBeg = max(0, iVertPos + ps.rcPaint.top / cyChar);iPaintEnd = min(NUMLINES - 1, iVertPos + ps.rcPaint.bottom / cyChar);for (i = 0; i < NUMLINES; 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); //设置接下来文字的对齐方式TextOut(hdc, x + 32 * cxCaps + 40 * cxChar, y, szBuffer,wsprintf(szBuffer, L"%5d",GetSystemMetrics(sysmetrics[i].iIndex)));SetTextAlign(hdc, TA_LEFT | TA_TOP); //还原对齐方式}EndPaint(hWnd, &ps);return 0;case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hWnd, uMsg, wParam, lParam);
} Output:
转载于:https://www.cnblogs.com/coolcpp/p/windows-keyboard.html
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