how to restore the removed tab from central Widget of QMainWindow

Qt Enthusiast

I have following code
d_tab = new QTabWidget
void MyMainWindow::createTabWidget(Qt::DockWidgetArea corner)
{
myView = new MyView(NULL);
addTab(myView, tr("&MyView"));
setCentralWidget(d_tab);
}

void MyMainWindow::closeTab()
{
if (QWidget* w = d_tab->widget(index)) {
QString title = d_tab->tabText(index);
bool enabled = d_tab->isTabEnabled(index);
d_tab->removeTab(index);

w->setParent(NULL);
GQDockWidget* dw = newDockWidget(w, title, enabled);
dw->setTabified(true);

}
QObject::connect(d_tab, SIGNAL(closeTab(int)), this, SLOT(closeTab(int)));
Using code I want to restore the closed tab

jsulm

@Qt-Enthusiast Then create add add the tab again

J.Hilk

@Qt-Enthusiast removeTab does not delete the widget so you can easily add it back later. The only thing you need is probably a pointer to your widget. You should do that anyway, because with the code you have right now it is just floating in your memory unused, after it has been removed.

so create a class-member:

private:
QWidget *removedTab = Q_NULLPTR;

before you remove the tab set the pointer

removedTab = d_tab->widget(index);
d_tab->removeTab(index);

to add it back again

if(removedTab)
    d_tab->insertTab(index,removedTab, const QString &label);

Qt Enthusiast

ut is there any automatic way to do the same
any signal
that does the same job I just emit that signal instead of calling the insert tab code

J.Hilk

@Qt-Enthusiast it doesn't get much easier than that, but If you dont want to handle this in your main class, you can derive your own tabwidget class and create such a function.

#include <QTabWidget>

class myTabWidget : public QTabWidget{
    Q_OBJECT
    explicit myTabWidget(QWidget * parent = 0) : QTabWidget(parent){}
    ~myTabWidget(){if(lastRemoved)lastRemoved->deleteLater();}

public:
    void removeTab(int index){
      lastRemoved = widget(index);
      m_index = index;
      m_TabTitel = tabText(index);
      QTabWidget::removeTab(index);
    }

   void restoreTab(){
        if(lastRemoved){
           insertTab(m_index, lastRemoved, m_TabTitel )
           lastRemoved = Q_NULLPTR;
        }
   }

private:
   QWidget *lastRemoved = Q_NULLPTR;
   int m_index = 0;
   QString m_TabTitel;
}