Force dialogs to float; like QInputDialog

[swurl]

Pretext: I use a tiling window manager that has the ability to make certain windows float (in my case, sway).

Whenever I use Qt's built-in dialogs like QInputDialog, the dialogs float as such (using QInputDialog::getText):

However, I am looking to getting QDialogs I subclass to also show like this, but all of them get tiled along with the rest of my windows.

I looked at the source code for the getText method:

QString QInputDialog::getText(QWidget *parent, const QString &title, const QString &label,
                              QLineEdit::EchoMode mode, const QString &text, bool *ok,
                              Qt::WindowFlags flags, Qt::InputMethodHints inputMethodHints)
{
    QAutoPointer<QInputDialog> dialog(new QInputDialog(parent, flags));
    dialog->setWindowTitle(title);
    dialog->setLabelText(label);
    dialog->setTextValue(text);
    dialog->setTextEchoMode(mode);
    dialog->setInputMethodHints(inputMethodHints);

    const int ret = dialog->exec();
// ...
}

This looks suspiciously like it does absolutely nothing to make it appear as a popup like that, except maybe for the use of exec. I tried using exec as well (which I wouldn't have wanted either way due to its blocking nature), but this did NOT work.

I also tried various window flags; Qt::WindowStaysOnTopHint, Qt::Popup, Qt::Tool, none achieved anything. Tried setModal(true), didn't work.

What does the QInputDialog do to achieve this that I don't understand? Or is this some weird quirk of i3/sway?

[ChrisW67]

@swurl The window manager may treat a top-level modal dialog, i.e. unparented and opened with exec(), to one that has a parent. It may also treat an application modal dialog differently to a window-modal one.

[ChrisW67]

@swurl What is the parent widget of the QInputDialog? And yours?

[swurl]

@ChrisW67 The QInputDialog's parent widget is the main window class. Looks like I forgot to set the parent of the other dialogs... would that achieve the behavior I'm looking for?

[ChrisW67]

@swurl The window manager may treat a top-level modal dialog, i.e. unparented and opened with exec(), to one that has a parent. It may also treat an application modal dialog differently to a window-modal one.

[swurl]

@ChrisW67 Thanks, it appears that having no parent widget treated it as a top-level independent window, but adding the parent widget worked, even without exec(). Thanks!