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QTreeWidgetItem checkState() signal and slot?

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  • P Offline
    P Offline
    pditty8811
    wrote on last edited by
    #1

    How do I implement a QTreeWidgetItem checkState() signal and slot?

    I have a child QTreeWidgetitem that I want to deliver a signal if it is checked or unchecked, so the parent treewidgetitem will uncheck too. Sort of like a full packge install, that unchecks the parent box if just one of the child boxes are unchecked.

    I'm learning signals and slots implementation without the ui, just now.

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    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      You don't do it on the items (they are not QObject), but in the QTreeWidget using e.g.
      @QTreeWidget::itemChanged ( QTreeWidgetItem * item, int column )@

      Connect that signal to a custom slot and handle there the modification of your items.

      Hope it helps

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • sonichyS Offline
        sonichyS Offline
        sonichy
        wrote on last edited by
        #3
        TWI->setCheckState(column, Qt::Checked);
        connect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*, int)), this, SLOT(treeWidgetItemChanged(QTreeWidgetItem*, int)));
        
        void MainWindow::treeWidgetItemChanged(QTreeWidgetItem *TWI, int column)
        {
            if (TWI->checkState(column) == Qt::Checked){
                ......
            } 
        }
        

        https://github.com/sonichy

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