Get widget from QTabWidget

[Creatorczyk]

Hi,

I have created a "SectionsManager" class that publicly inherits from QTabWidget. I created a object of this class and a new tab:

Section *section = new Section();
addTab(section, section->getSectionName());

"section" is an object of the Section class which inherits publicly from the Widget class. In the further part of the code I would like to get from the given tab about the index and extract the widget that I placed there earlier

Section *section = ui->sectionManager->widget(index);

however, it gets an error during compilation:
"invalid conversion from 'QWidget' to 'Section'

What could I do to fix it and be able to get from the given index of the tab the ptr of the object which I previously placed there

[Bonnie]

Section *section = qobject_cast<Section*>(ui->sectionManager->widget(index));

[Creatorczyk]

@Bonnie I did as you said and actually the code is compiling. However, I have a problem when I try use the methods of this object's class. The application is crashed.

QString name = section->getSectionName();

Do you know what could be the reason?

[Bonnie]

Probably because section equals nullptr.
You should add some protection when you use the cast so that it won't crash.

if(Section *section = qobject_cast<Section*>(ui->sectionManager->widget(index))) {
  QString name = section->getSectionName();
}

Are you sure the result of ui->sectionManager->widget(index) is a Section?
If section equals nullptr, that means it isn't.
BTW, you can get the tab name by

QString QTabWidget::tabText(int index) const

[Creatorczyk]

@Bonnie It's works, thanks