Child window elements are blocked

Helg1980

Hi!

I have three windows: MainWindow, SelectPreset, Preset.
The SelectPreset window is called from the MainWindow window.
And the Preset window is called from the SelectPreset window.
But I can't understand why the Preset window elements are blocked (At the same time, this happens for some reason in Debian, in other systems I did not notice this).

Here's how my files work:

mainwindow.cpp

MainWindow::MainWindow(QWidget *parent) : 
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}
.
.
.
SelectPreset select_preset;
select_preset.setModal(true);
select_preset.exec();

selectpreset.cpp

SelectPreset::SelectPreset(QWidget *parent) :
    QDialog(parent),
    ui_selectpreset(new Ui::SelectPreset)
{
    ui_selectpreset->setupUi(this);
}
.
.
.
Preset preset;
preset.setModal(true);
preset.exec();

preset.cpp

Preset::Preset(QWidget *parent) :
    QDialog(parent),
    ui_preset(new Ui::Preset)
{
    ui_preset->setupUi(this);
}

Pl45m4

@Helg1980

Modal windows will start their own event loop and block other windows.

exec will always start a new event loop and show a modal dialog. If you dont want modal windows, use show() for example.
https://doc.qt.io/qt-5/qdialog.html#modal-prop

Helg1980

I need the other windows to be blocked. But why is the current window blocked?

Pl45m4

@Helg1980

Try to make Select Preset a parent of Preset by passing this with c'tor when creating Preset

Helg1980

This command:
ui_preset->setupUi(this);

if I just remove 'this', it don't work

Pl45m4

@Helg1980

I was talking about this:

Preset preset;
preset.setModal(true);
preset.exec();

Try: Preset preset(this);

Helg1980

It worked! Thank you very much!

Pl45m4

@Helg1980

Nice to hear! Don't forget to mark your issue as solved.