Qt Hide Taskbar Item

Qt Hide Taskbar Item:

The short   parent widget place the holder  and  without a widget parent  is consider by a top level window and to  create by  child level window  and not  get a taskbar entry  . The parent window  on the other hand also not get a taskbar entry because it does not set as clear .

class MyWindowWidget : public QWidget
{
public:
      MyWindowWidget(QWidget *parent)
        : QWidget(parent, Qt::Dialog)
    {
   
    }
};
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
   
    QMainWindow window;
   
    MyWindowWidget widget(&window);
    widget.show();
   
    return app.exec();
}

    Here the taskbar is not visible .

The simple and short answer is:

       To hide the widget without  displaying in  the taskbar  and will be check by the windowflags of the widget.  The Qt::Dialog | Qt::Tool and Qt::CustomizeWindowHint  the window has not fixed up. The gate policy of  application. Hiding the last toplevel-window  and exit by the normal and to call QApplication::setQuitOnLastWindowClosed false

The alternative answer is:

        To  fixed the Qt::SubWindow flag  to the widget.