6-Windows程式設計 -鍵盤

来源:https://www.cnblogs.com/httpcc/archive/2022/05/09/16229633.html
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6、 1 鍵盤消息 // 4_4_例子Sysmets.cpp : 定義應用程式的入口點。 // #include "pch.h" #include "framework.h" #include "4_4_例子Sysmets.h" #include "data.h" #define MAX_LOADS ...


  6、 1  鍵盤消息

    

     

// 4_4_例子Sysmets.cpp : 定義應用程式的入口點。
//

#include "pch.h"
#include "framework.h"
#include "4_4_例子Sysmets.h"
#include "data.h"

#define MAX_LOADSTRING 100

// 全局變數:
HINSTANCE hInst;                                // 當前實例
WCHAR szTitle[MAX_LOADSTRING];                  // 標題欄文本
WCHAR szWindowClass[MAX_LOADSTRING];            // 主視窗類名

// 此代碼模塊中包含的函數的前向聲明:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    // TODO: 在此處放置代碼。

    // 初始化全局字元串
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_MY44SYSMETS, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // 執行應用程式初始化:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_MY44SYSMETS));

    MSG msg;

    // 主消息迴圈:
    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}



//
//  函數: MyRegisterClass()
//
//  目標: 註冊視窗類。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEXW wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MY44SYSMETS));
    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = NULL;//MAKEINTRESOURCEW(IDC_MY44SYSMETS);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassExW(&wcex);
}

//
//   函數: InitInstance(HINSTANCE, int)
//
//   目標: 保存實例句柄並創建主視窗
//
//   註釋:
//
//        在此函數中,我們在全局變數中保存實例句柄並
//        創建和顯示主程式視窗。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hInst = hInstance; // 將實例句柄存儲在全局變數中

   HWND hWnd = CreateWindowW(szWindowClass, TEXT("Get System Metrics NO.1"), WS_OVERLAPPEDWINDOW | WS_VSCROLL,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  函數: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  目標: 處理主視窗的消息。
//
//  WM_COMMAND  - 處理應用程式菜單
//  WM_PAINT    - 繪製主視窗
//  WM_DESTROY  - 發送退出消息並返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        static int cxChar, cxCaps, cyChar, iVScrollPos,cyClient;
        PAINTSTRUCT ps;
        HDC hdc;
        TCHAR szBuffer[10];
        TEXTMETRIC tm;
        size_t y;
        SCROLLINFO si;
        size_t iVertPos;
        size_t iPaintBeg, iPaintEnd;
    case WM_CREATE:
        {
            hdc = GetDC(hWnd);
            GetTextMetrics(hdc,&tm);
            cxChar = tm.tmAveCharWidth;

            //變寬的字體是小寫字體的1.5倍
            cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;

            //字體的高度 + 外部的間距(字體設計的人推薦的加)
            cyChar = tm.tmHeight + tm.tmExternalLeading;

            ReleaseDC(hWnd, hdc);
            iVScrollPos = 0;

            //SetScrollRange(hWnd, SB_VERT, 0, NUMLINES - 1, FALSE);
            //SetScrollPos(hWnd, SB_VERT, iVScrollPos, TRUE);

            return 0;
        }
    case WM_SIZE:
        //客戶區的高度
        cyClient = HIWORD(lParam);

        si.cbSize = sizeof(si);
        si.fMask = SIF_RANGE | SIF_PAGE;
        //客戶區一頁有多少行
        si.nPage = cyClient / cyChar;
        si.nMin = 0;
        si.nMax = NUMLINES;

        SetScrollInfo(hWnd, SB_VERT, &si, true);
        break;
    case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // 分析菜單選擇:
            switch (wmId)
            {
            case IDM_ABOUT:
                DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                break;
            case IDM_EXIT:
                DestroyWindow(hWnd);
                break;
            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
            }
        }
        break;
    case WM_PAINT:
        {
           hdc = BeginPaint(hWnd, &ps);
            // TODO: 在此處添加使用 hdc 的任何繪圖代碼...
           si.cbSize = sizeof(si);
           si.fMask = SIF_POS;
           GetScrollInfo(hWnd, SB_VERT, &si);
           iVertPos = si.nPos;

           //無效區域開始位置
           iPaintBeg = max(0, iVertPos + ps.rcPaint.top/cyChar);

           //無效區域結束位置
           iPaintEnd = min(NUMLINES - 1, iVertPos + ps.rcPaint.bottom / cyChar);

           for (int i = iPaintBeg; i <= iPaintEnd; ++i)
           {
               y = cyChar * (i - iVertPos);
                TextOut(hdc, 0, y, sysmetrics[i].szLabel, lstrlen(sysmetrics[i].szLabel));
                TextOut(hdc, 22 * cxCaps, y, sysmetrics[i].szDesc, lstrlen(sysmetrics[i].szDesc));

                SetTextAlign(hdc, TA_RIGHT | TA_TOP);
                TextOut(hdc, 22 * cxCaps + 40 * cxChar, y, szBuffer, wsprintf(szBuffer, TEXT("%5d"), GetSystemMetrics(sysmetrics[i].iIndex)));
                SetTextAlign(hdc, TA_LEFT | TA_TOP);
           }
            EndPaint(hWnd, &ps); 
        }
        break;
    case WM_VSCROLL:
        si.cbSize = sizeof(si);
        si.fMask = SIF_ALL;
        GetScrollInfo(hWnd,SB_VERT,&si);
        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:
            //iVScrollPos -= 1; 
            si.nPos -= 1;
            break;
        case SB_LINEDOWN:
            //iVScrollPos += 1;
            si.nPos += 1;
            break;
        case SB_PAGEUP:
            //iVScrollPos -= cyClient / cyChar;
            si.nPos -= si.nPage;
            break;
        case SB_PAGEDOWN:
            //iVScrollPos += cyClient / cyChar;
            si.nPos += si.nPage;
            break;

        //case SB_THUMBPOSITION:
        case SB_THUMBTRACK:
            //iVScrollPos = HIWORD(wParam);
            si.nPos = si.nTrackPos;
            break;
        default:
            break;
        }
        si.fMask = SIF_POS;
        SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
        GetScrollInfo(hWnd, SB_VERT, &si);

        if (si.nPos != iVertPos)
        {
            //刷新滾動視窗客戶區的內容
            ScrollWindow(hWnd, 0, cyChar*(iVertPos - si.nPos), NULL, NULL);
            UpdateWindow(hWnd);
        }


        //iVScrollPos = max(0, min(iVScrollPos, NUMLINES - 1));


        //if (iVScrollPos != GetScrollPos(hWnd,SB_VERT))
        //{
        //    SetScrollPos(hWnd, SB_VERT, iVScrollPos, true);
        //    InvalidateRect(hWnd, NULL, TRUE);
        //    UpdateWindow(hWnd);
        //}
        
        break;
    case WM_KEYDOWN:
        switch (wParam)
        {
        case VK_DOWN:
            SendMessage(hWnd, WM_VSCROLL, SB_LINEDOWN, 0);
            break;
        case VK_UP:
            SendMessage(hWnd, WM_VSCROLL, SB_LINEUP, 0);
            break;
        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;
        default:
            break;
        }
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// “關於”框的消息處理程式。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
    switch (message)
    {
    case WM_INITDIALOG:
        return (INT_PTR)TRUE;

    case WM_COMMAND:
        if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
        {
            EndDialog(hDlg, LOWORD(wParam));
            return (INT_PTR)TRUE;
        }
        break;
    }
    return (INT_PTR)FALSE;
}
View Code
#pragma once
//data.h    頭文件內容

#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_CXVIRTU

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  • 如何將 ASP.NET Core MVC 項目的視圖分離到另一個項目 在當下這個年代 SPA 已是主流,人們早已忘記了 MVC 以及 Razor 的故事。但是在某些場景下 SSR 還是有意想不到效果。比如某些靜態頁面,比如追求首屏載入速度的時候。最近在項目中回歸傳統效果還是不錯。 有的時候我們希望將 ...
  • System.AggregateException: 發生一個或多個錯誤。 > Microsoft.WebTools.Shared.Exceptions.WebToolsException: 生成失敗。檢查輸出視窗瞭解更多詳細信息。 內部異常堆棧跟蹤的結尾 > (內部異常 #0) Microsoft ...
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  • 在C#編程世界中,語法的精妙之處往往體現在那些看似微小卻極具影響力的符號與結構之中。其中,“_ =” 這一組合突然出現還真不知道什麼意思。本文將深入剖析“_ =” 的含義、工作原理及其在實際編程中的廣泛應用,揭示其作為C#語法奇兵的重要角色。 一、下劃線 _:神秘的棄元符號 下劃線 _ 在C#中並非 ...