How can I add a “new tab” button next to the tabs of a QMdiArea in tabbed view mode?

Question

I\'d like to have a \"new tab\" button much like Chrome or Firefox has for my QMdiArea.

I can make a button or menu item somewhere that adds a new subdo

Answer 1

Why not make a button out of the last tab of your QTabWidget ? Just create the last tab with a '+' symbol on it and use the currentChanged event.

class Trace_Tabs(QTabWidget):

    def __init__(self):
        QTabWidget.__init__(self)       
        self._build_tabs()

    def _build_tabs(self):
        self.setUpdatesEnabled(True)

        self.insertTab(0,QWidget(), "Trace" )
        self.insertTab(1,QWidget(),'  +  ') 

        self.currentChanged.connect(self._add_trace) 

    def _add_trace(self, index):    

        if index == self.count()-1 :    
            '''last tab was clicked. add tab'''
            self.insertTab(index, QWidget(), "Trace %d" %(index+1)) 
            self.setCurrentIndex(index)

if __name__ == '__main__':    
    app = QApplication([])    
    tabs = Trace_Tabs()
    tabs.show()    
    app.exec_()