QMainWindow 中的两个 QWidget 具有最小化按钮和窗口标题

Question

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    textEdit1 = new QTextEdit();
    textEdit1->setWindowTitle("First Notepad");
    textEdit2 = new QTextEdit();
    textEdit2->setWindowTitle("First Notepad");
    layout = new QVBoxLayout();
    layout->addWidget(textEdit1);
    layout->addWidget(textEdit2);

    newTab = new QWidget();
    newTab->setLayout(layout);

    ui->setupUi(this);
    setCentralWidget(newTab);
}

The above is my code sample of the MainWindow constructor. Ot has two qTextEdits which are in a VerticalBox layout. I want both the textEdits to have a title bar and minimize and maximize button so that at a time I can use one of them or both of them. But as you can see the output the Window Title bars are not there.

How can I make the Title bar appear? Why is it that setWindowTitle("First Notepad") do not display the Title?

If I am doing it wrong please suggest as what other way I can proceed. Any suggestion is welcome.

What I am trying is like one MainWindow having multiple sub-windows with fixed positions.

Answer 1

What I am trying is like one MainWindow having multiple sub-windows with fixed positions.

What you are looking for is probably a QMdiArea along with multiple QMdiSubWindow .
As mentioned in the documentation of `QMdiArea:

The QMdiArea widget provides an area in which MDI windows are displayed

Moreover:

QMdiArea is commonly used as the center widget in a QMainWindow to create MDI applications, but can also be placed in any layout.

I've used it, but I've never tried to give fixed positions to the subwindows. Anyway it's apparently possible. Probably QMdiArea::tileSubWindows is already enough for your requirements.
Set custom titles and bars to the windows is given for free instead:

QMdiSubWindow represents a top-level window in a QMdiArea, and consists of a title bar with window decorations, an internal widget, and (depending on the current style) a window frame and a size grip. QMdiSubWindow has its own layout, which consists of the title bar and a center area for the internal widget

See the official documentation for further details.