Show/Hide sub-tab on QTabWidget

Question

Assuming I have a QTabWidget that contains 5 sub-tabs. Now I want to show/hide a sub-tab in one of 5 sub-tabs by following code

ui->twListTabs->widget(0)->hide();           // Hide first sub-tab

But this didn’t work for me. Do you have any solutions?

Thanks!

Verenaverene

Answer 1

You only have the option to use:

void QTabWidget::removeTab(int index)

You need to store the pointer to the QWidget in the tab so that you can later insert it.

You could e.g. do something like:

class TabWidget : public QTabWidget
{
    Q_OBJECT          
    enum tabwidgets {tabwidget1,tabwidget2,...,number_of_tabwidgets};
    QWidget* widgets_[number_of_tabwidgets];
public:
    TabWidget(QWidget* parent = 0) : QWidget(parent)
    {
        for(int i(0); i < number_of_tabwidgets; ++i)
        {
            switch(i)
            {
            case tabwidget1:
                insertTab(i,widgets_[i] = new TabWidget1,QString::number(i));
                ....
            }
        }
    }
};

Burl

If you have the tab in the UI Designer of Qt Creator, there's no need for this complexity. Just use removeTab and later, to add it back, just use the findChild function to pull up the tab (it's still there, managed by the UI object, even after being removed from the tab widget). See comment dated Aug 12, 2011 here: qtcentre.org/threads/… (and it works for me, 6 years later). – Capua

@Dan Nissenbaum yes it is a matter of coding style. You see a lot of code around storing pointers to various gui controls, but I've also started to use findChild more. Also lambda callback that is available from C++11 reduces the need to store pointers. – Burl

@DanNissenbaum : You should put your reply as an answer. Anyway, thank you. – Coshow

Qt 5.15 introduced a setTabVisible method, see: doc.qt.io/qt-5/qtabwidget.html#setTabVisible – Ellaelladine

Answer 2

To hide I used:

ui->tabWidget->removeTab(ui->tabWidget->indexOf(ui->tabToBeRemoved));

To show I believe you can insert it back with insertTab() to the same position/index.

In Qt 5.15+ you can use setTabVisible().

Atiana