QTreeWidgetItem error while get data

[Creatorczyk]

Hi,

I would like my QTreeWidgetItem class objects to hold one of the Animal enum values defined outside the class

enum Animal{ Cat, Dog, Snake};

QTreeWidgetItem *phaseItem = new QTreeWidgetItem();
phaseItem->setText(0, "dog);
phaseItem->setFlags(phaseItem->flags() | Qt::ItemIsUserCheckable | Qt::ItemIsSelectable);
phaseItem->setCheckState(0, Qt::Unchecked);
phaseItem->setData(0, Qt::UserRole, Animal::Dog);
addTopLevelItem(phaseItem);

I connected the signal to the slot and while unchecking the checkbox I would like to get the enum value

QObject::connect(this, &QTreeWidget::itemChanged, this, &SeriesManager::treeWidgetItemChanged);

void SeriesManager::treeWidgetItemChanged(QTreeWidgetItem *item, int i)
{
    QVariant v = item->data(0, Qt::UserRole);
    Phase phase = v.value<Animal>();
}

But get error:

QtCore\qglobal.h:688: error: static assertion failed: Type is not registered, please use the Q_DECLARE_METATYPE macro to make it known to Qt's meta-object system
 
QtCore\qmetatype.h:1476: error: 'qt_metatype_id' is not a member of 'QMetaTypeId<Animal>'

QtCore\qmetatype.h:1476: error: body of constexpr function 'static constexpr int QMetaTypeId2<T>::qt_metatype_id() [with T = Animal]' not a return-statement

How could I reseived my enum data from function "data()"?

[SGaist]

Hi,

@Creatorczyk said in QTreeWidgetItem error while get data:

QtCore\qglobal.h:688: error: static assertion failed: Type is not registered, please use the Q_DECLARE_METATYPE macro to make it known to Qt's meta-object system

You have here what to do to be able to do what you want.