代码

1.关闭窗口
本质上就是发组合键：Alt+F4 

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void closeWindow()
{
#if defined Q_OS_WIN
    keybd_event(VK_LMENU,0,0,0);
    keybd_event(VK_F4,0,0,0);
    keybd_event(VK_F4,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_LMENU,0,KEYEVENTF_KEYUP,0);
#elif defined Q_OS_LINUX
    Display *disp = XOpenDisplay(nullptr);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Alt_L), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_F4), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_F4), false, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Alt_L), false, CurrentTime);
    XCloseDisplay(disp);
#endif
}

2.显示桌面

本质上就是发组合键：Win+D

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void showDesktop()
{
#if defined Q_OS_WIN
    keybd_event(VK_LWIN,0,0,0);
    keybd_event(68,0,0,0);
    keybd_event(68,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_LWIN,0,KEYEVENTF_KEYUP,0);
#elif defined Q_OS_LINUX
    Display *disp = XOpenDisplay(nullptr);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Super_L), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_D), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_D), false, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Super_L), false, CurrentTime);
    XCloseDisplay(disp);
#endif
}

3.Page Up/Page Down

本质上就是模拟按下对应的键

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void pageUp()
{
#if defined Q_OS_WIN
    keybd_event(VK_PRIOR,0,0,0);
    keybd_event(VK_PRIOR,0,KEYEVENTF_KEYUP,0);
#elif defined Q_OS_LINUX
    Display *disp = XOpenDisplay(nullptr);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Page_Up), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Page_Up), false, CurrentTime);
    XCloseDisplay(disp);
#endif
}

void pageDown()
{
#if defined Q_OS_WIN
    keybd_event(VK_NEXT,0,0,0);
    keybd_event(VK_NEXT,0,KEYEVENTF_KEYUP,0);
#elif defined Q_OS_LINUX
    Display *disp = XOpenDisplay(nullptr);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Next), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Next), false, CurrentTime);
    XCloseDisplay(disp);
#endif
}

4.多任务

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void showDesktop()
{
#if defined Q_OS_WIN
    keybd_event(VK_CONTROL,0,0,0);
    keybd_event(VK_LMENU,0,0,0);
    keybd_event(VK_TAB,0,0,0);
    keybd_event(VK_TAB,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_CONTROL,0,KEYEVENTF_KEYUP,0);
    keybd_event(VK_LMENU,0,KEYEVENTF_KEYUP,0);
#elif defined Q_OS_LINUX
    Display *disp = XOpenDisplay(nullptr);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Super_L), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_W), True, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_W), false, CurrentTime);
    XTestFakeKeyEvent(disp, XKeysymToKeycode(disp,XK_Super_L), false, CurrentTime);
    XCloseDisplay(disp);
#endif
}