win32学习09.系统消息触发的总结

#include <Windows.h>#include <iostream>using namespace std;/**********************点击鼠标滑动弹起，取坐标画圆，然后根据键盘上下左右移动圆。鼠标移动也可以让圆一起动。鼠标滚轮滑动可以让圆变大小。***********************/HINSTANCE g_hInstance = 0; //接收应用程序实例句柄HANDLE g_hOutput = 0;int g_xPos = 100,g_yPos = 100;//圆外接矩形左上角坐标int nD = 100;//diameter直径BOOL bPaint = FALSE; //为了让防止移动消息对画圆的干扰//也可以用两次按下鼠标消息确定坐标来避免//初始化创建void OnCreate(HWND hwnd){    SetTimer(hwnd,1,1000,NULL);}//绘制void OnPaint(HWND hWnd){    PAINTSTRUCT ps = {0};    HDC hdc = BeginPaint(hWnd,&ps);    RECT rc = {0};    GetClientRect(hWnd,&rc);    if (bPaint)    {        Ellipse(hdc,g_xPos,g_yPos,g_xPos+nD,g_yPos+nD);         //Sleep(1000); //避免鼠标移动过快看不清    }    EndPaint(hWnd,&ps);}//定时器消息void OnTimer(HWND hWnd,WPARAM wParam){    CHAR szText[256] = {0};    sprintf(szText,"定时器触发\n");    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);}//鼠标左键按下void OnLButtonDown(HWND hWnd,WPARAM wParam,LPARAM lParam){    LONG xPos = LOWORD(lParam);    LONG yPos = HIWORD(lParam);    CHAR szText[256] = {0};    sprintf(szText,"鼠标左键按下状态：X=%d,Y=%d\n",xPos,yPos);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);    g_xPos = xPos;    g_yPos = yPos;}//鼠标左键弹起void OnLButtonUp(HWND hWnd,WPARAM wParam,LPARAM lParam){    LONG xPos = LOWORD(lParam);    LONG yPos = HIWORD(lParam);    CHAR szText[256] = {0};    sprintf(szText,"鼠标左键弹起状态：X=%d,Y=%d\n",xPos,yPos);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);    nD = yPos - g_yPos;    bPaint = TRUE;    InvalidateRect(hWnd,NULL,TRUE);//重绘}//鼠标移动void OnMouseMove(HWND hWnd,WPARAM wParam,LPARAM lParam){    LONG xPos = LOWORD(lParam);    LONG yPos = HIWORD(lParam);    CHAR szText[256] = {0};    sprintf(szText,"鼠标移动状态：X=%d,Y=%d\n",xPos,yPos);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);    if (bPaint)    {        g_xPos = xPos - nD/2;        g_yPos = yPos - nD/2;        InvalidateRect(hWnd,NULL,TRUE);    }}//鼠标滚轮void OnMouseWheel(HWND hWnd,WPARAM wParam,LPARAM lParam){    short nXPos = LOWORD(lParam);    short nYPos = HIWORD(lParam);    short nDelta = HIWORD(wParam);    POINT ptPos = {nXPos,nYPos};    ScreenToClient(hWnd,&ptPos);    CHAR szText[256] = {0};    sprintf(szText,"鼠标滚轮状态：X=%d(%d),Y=%d(%d)，Delta=%d\n",nXPos,ptPos.x,nYPos,ptPos.y,nDelta);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);    nD = nD + (nDelta/120)*2;    InvalidateRect(hWnd,NULL,TRUE);}//键盘按下：void OnKeyDown(HWND hWnd,WPARAM wParam,LPARAM lParam){    CHAR szText[256] = {0};    sprintf(szText,"键盘按下：%08X\n",wParam);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);    switch(wParam){    case VK_UP: g_yPos;break;    case VK_DOWN: g_yPos++;break;    case VK_LEFT: g_xPos--;break;    case VK_RIGHT: g_xPos++;break;    }    InvalidateRect(hWnd,NULL,TRUE);//重绘}//键盘弹起void OnKeyUp(HWND hWnd,WPARAM wParam,LPARAM lParam){    CHAR szText[256] = {0};    sprintf(szText,"键盘弹起：%08X\n",wParam);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);}//可见字符消息void OnChar(HWND hWnd,WPARAM wParam,LPARAM lParam){    char szText[200];    sprintf(szText,"可见字符按下，char is %d\n",wParam);    WriteConsole(g_hOutput,szText,strlen(szText),NULL,NULL);}//注册窗口类BOOL RegisterWindowClass(    LPSTR lpClassName,    WNDPROC wndproc    ){    //设计窗口类    WNDCLASS wndcls;    wndcls.style = CS_HREDRAW | CS_VREDRAW;    wndcls.lpfnWndProc = wndproc;    wndcls.cbClsExtra = 200;//字节为单位，一般为4的倍数，long型数据4字节    wndcls.cbWndExtra = 200;    wndcls.hInstance = g_hInstance;    wndcls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);    wndcls.hCursor = LoadCursor(NULL,IDC_CROSS);    wndcls.hIcon = LoadIcon(NULL,IDI_ERROR);    wndcls.lpszClassName = lpClassName;    wndcls.lpszMenuName = NULL;    ATOM nAtom = RegisterClass(&wndcls);//注册窗口类    if (nAtom == 0)    {        return FALSE;    }    return TRUE;}//窗口过程函数LRESULT CALLBACK WinSunProc(    HWND hwnd,          UINT uMsg,          WPARAM wParam,      LPARAM lParam       ){    switch(uMsg)    {    case WM_CREATE:        OnCreate(hwnd);        break;    case WM_LBUTTONDOWN:        OnLButtonDown(hwnd,wParam,lParam);        break;    case WM_LBUTTONUP:        OnLButtonUp(hwnd,wParam,lParam);        break;    case WM_MOUSEMOVE:        OnMouseMove(hwnd,wParam,lParam);        break;    case WM_MOUSEWHEEL:        OnMouseWheel(hwnd,wParam,lParam);        break;    case WM_KEYDOWN:        OnKeyDown(hwnd,wParam,lParam);        break;    case WM_SYSKEYUP:        OnKeyUp(hwnd,wParam,lParam);        break;    case WM_CHAR: //按下字符键        OnChar(hwnd,wParam,lParam);        break;    case WM_PAINT: //重绘        OnPaint(hwnd);        break;    case WM_TIMER:        OnTimer(hwnd,wParam);        break;    case WM_CLOSE://关闭        if(IDYES==MessageBox(hwnd,"Close?","HappyTeemo",MB_YESNO))        {            DestroyWindow(hwnd);        }        break;    case WM_DESTROY://销毁        PostQuitMessage(0);        break;    default:        return DefWindowProc(hwnd,uMsg,wParam,lParam);    }    return 0;}//创建父窗口HWND CreateFather(LPSTR lpClassName,LPSTR lpWndName){    HWND hwnd;    hwnd = CreateWindow(lpClassName,lpWndName,WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,g_hInstance,NULL);    return hwnd;}//创建子窗口HWND CreatChild(LPSTR lpClassName,LPSTR lpWndName,HWND hParent){    HWND hwnd;    hwnd = CreateWindow(lpClassName,lpWndName,WS_CHILD|WS_VISIBLE|WS_OVERLAPPEDWINDOW,0,0,100,100,hParent,NULL,g_hInstance,NULL);    return hwnd;}//设置额外信息void SetExtra(HWND hwnd){    LPCTSTR str = "hello";    //SetClassLong(hwnd,0,100);    SetClassLong(hwnd,250,(LONG)str); //从250开始放    //窗口类的附加数据缓冲区：是所以基于该类创建的窗口共享的    SetWindowLong(hwnd,0,100);    //窗口自己私有的缓冲区}//获取额外信息void GetExtra(HWND hwnd){    LONG nClassExtra = GetClassLong(hwnd,250);//从250开始读    LONG nWndExtra = GetWindowLong(hwnd,0);    char Test[256] = {0};    sprintf(Test,"ClS:%s,Hwnd:%d",(char*)nClassExtra,nWndExtra);    MessageBox(NULL,Test,"Info",MB_OK);}//显示窗口欧void DisplayWindow(HWND hwnd){    ShowWindow(hwnd,SW_SHOW);    UpdateWindow(hwnd);}//消息循环void MyMessage(){    //定义消息结构体，开始消息循环    MSG msg = {0};    while(GetMessage(&msg,NULL,0,0))    {        TranslateMessage(&msg);        DispatchMessage(&msg);    }}int  APIENTRY WinMain(     HINSTANCE hInstance,//当前程序的实例句柄，找到本进程的内存    HINSTANCE hPrevInstance,  //前一个实例句柄，已经废弃，一般为NULL    LPSTR lpCmdLine, //命令行参数字符串    int nShowCmd //窗口的显示方式：最大化，最小化，原样。    ){    AllocConsole();    g_hOutput = GetStdHandle(STD_OUTPUT_HANDLE);    g_hInstance = hInstance;    LPSTR ClassName = "HappyTeemo";    RegisterWindowClass(ClassName,WinSunProc);    HWND hMwndF = CreateFather(ClassName,"ParentWindow");    //HWND hMwndC1 = CreatChild(ClassName,"ChildWindow1",hMwndF);    //HWND hMwndC2 = CreatChild(ClassName,"ChildWindow2",hMwndF);    //MoveWindow(hMwndC2,310,100,200,200,TRUE); //最后一个参数表示是否删除移动前的窗口    //SetExtra(hMwndC1);    //GetExtra(hMwndC2);//只能读到窗口类的缓冲区，读不到子窗口1的缓冲区    DisplayWindow(hMwndF);    MyMessage();    return 0;}