Question

Windows任务栏可能具有状态＆＃34;自动隐藏＆＃34;。

有人知道在动画期间如何使用Windows任务栏使用QT进行检测吗？

如果这是不可能的，也许有办法检测任务栏切换状态是从隐藏显示还是显示或反对？

Answer 1

如果您想对Qt中的任务栏进行更改（不仅是在自动隐藏，还有用户移动和/或调整任务栏大小），您可以这样做：

void MainWindow::workAreaResized()
{
    //Get handle of taskbar
    HWND hTaskbarWnd = FindWindow(TEXT("Shell_TrayWnd"), NULL);

    //Get info about screen that the taskbar lives
    HMONITOR hMonitor = MonitorFromWindow(hTaskbarWnd, MONITOR_DEFAULTTONEAREST);
    MONITORINFO info = {sizeof(MONITORINFO)};

    if (GetMonitorInfo(hMonitor, &info))
    {
        //Get taskbar rect info
        RECT rect;
        GetWindowRect(hTaskbarWnd, &rect);

        //Calculate screen size
        int screenwidth = info.rcMonitor.right - info.rcMonitor.left;
        int screenheight = info.rcMonitor.bottom - info.rcMonitor.top;

        //Calculate top-left position
        int left = qMax(info.rcMonitor.left, rect.left);
        int top = qMax(info.rcMonitor.top, rect.top);

        //Calculate taskbar rectangle visible on the screen
        QRegion taskbar = QRegion(left, top, qMin((LONG)screenwidth, rect.right) - left, qMin((LONG)screenheight, rect.bottom) - top);

        //Get a rectangle of the screen
        QRegion screen = QRegion(info.rcMonitor.left, info.rcMonitor.top, screenwidth, screenheight);

        //Get the available area rect (the screen rectangle subtracted the taskbar rectangle)
        QRect workarea = screen.subtracted(taskbar).rects().first();

        //If work area is different than the actual window rectangle, move and/or resize it
        if (workarea.topLeft() != pos() || workarea.size() != size())
        {
            move(workarea.topLeft());
            resize(workarea.width() - (frameGeometry().width() - width()),
                   workarea.height() - (frameGeometry().height() - height()));
        }
    }
}

调用该函数，变量QRect workarea将包含任务栏所在的屏幕上的可用区域，此时您调用该函数。

Answer 2

您可以使用SHAppBarMessage ABM_GETSTATE来获取任务栏的状态。

如何检测任务栏从隐藏状态切换到显示状态

2 个答案: