Is it possible to create a signal for when a QTreeWidgetItem checkbox is toggled?

c++ qt checkbox signals-slots qtreewidgetitem
Robert Whitley picture Robert Whitley · Mar 13, 2012 · Viewed 13.3k times · Source

I've created a checkbox that's also a QTreeWidgetItem using the code below. 

//Populate list
QTreeWidgetItem *program = createCheckedTreeItem(QString::fromStdString(itr->first), true);
treePrograms->addTopLevelItem(program);

QTreeWidgetItem* ConfigDialog::createCheckedTreeItem(QString name,bool checkBoxState)
{
  QTreeWidgetItem *item = new QTreeWidgetItem(QStringList(name));
  item->setFlags(item->flags()|Qt::ItemIsUserCheckable);
  if (checkBoxState)
  {
    item->setCheckState(0,Qt::Unchecked);
  }
  else
  {
    item->setCheckState(0,Qt::Checked);
  }
  return item;
}

I need a way of connecting a signal and slot for when the state of this checkbox is changed. The current way I've implemented this is below but unfortunately doesn't work. Can someone explain what I'm doing wrong and what I need to do in order to get it to connect?

connect(program, SIGNAL(toggled(bool)), this, SLOT(programChecked(bool)));

Answer

Masci picture Masci · Mar 13, 2012

You have to grab the signal itemChanged ( QTreeWidgetItem * item, int column ) coming from QTreeWidget.

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