Keep QDialog open when parent is minimized? - c++

Question

I have a QMainWindow opening a QDialog (not modal). When I minimize the main window, the dialog is closed as well. Can I somehow keep it open? (the other way round as in Keep QMainWindow minimized when QDialogs show() ).
One thing I have tried is to ignore the event, but to my surprise I never see such a state. Actually I only see ActivationChange (0n99) there.
void CMyDialog::changeEvent(QEvent *evt)
{
QEvent::Type t = evt->type();
if (t == QEvent::WindowStateChange)
{
evt->ignore();
hide();
}
else
{
QDialog::changeEvent(evt);
}
}
Question in Qt center dealing with a similar topic:
http://www.qtcentre.org/threads/24765-Intercept-minimize-window-event
Here I create it as member:
QScopedPointer<MyDialog> m_navigator{new MyDialog(this)}; // this here is the main application window
It is displayed by a public slot:
void MyDialog::toogleNavigator()
{
this->setVisible(!this->isVisible());
}
and is a QDialog derived class:
class MyDialog : public QDialog { ...
---- Edit 2 ------
First Wouter has mentioned it , then Alexander. It is like you guys say, if I pass no parent (as in Alexander`s minimal example), the dialog stays open - with parent it is minimized along with its parent. My apologizes Wouter.
However, in my case it does not work like that. So I did not turn Wouter`s comment without checking or in bad intention. Now it is my duty to find out why. I suspect some utility classes to alter the dialog. I will report back here when I have found the root cause.
Ok, it is the windows flags. If the dialog is a tool window, it is always minimized, as normal window it depends on the parent.

Answer 1

Try to create MyDialog without this(MainApplication) like parent
and may be play with a second parameter of the constructor.
new MyDialog(0/*, ?*/);
Addition It is working code
MainWindow.cpp
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
QScopedPointer<Dialog> dialog;
};
MainWindow.hpp
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
dialog(new Dialog(0))
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
dialog->setVisible(!dialog->isVisible());
}