model populated signal

[VRonin]

@user4592357 said in model populated signal:

it didn't activate the slot

That means you didn't implement the model correctly, see http://doc.qt.io/qt-5/qabstractitemmodel.html#subclassing it's not easy :)

[user4592357]

@VRonin
do you mean emitting dataChanged()? my model isn't editable so i don't need it

[VRonin]

The fact the is editable or not is meaningless, if any change in your model should trigger a repaint in the view you should emit that signal

[user4592357]

@VRonin
still no luck :(

[VRonin]

Can you post your model implementation?

[user4592357]

@VRonin
sorry it's python. nothing specific to it, though.

class TableModel(QAbstractTableModel):
	headers = [/* items */]

	def __init__(self, parent=None):
		super(TableModel, self).__init__(parent)
		self.__data = []

	def rowCount(self, parent=QModelIndex()):
		del parent
		return len(self.__data)

	def columnCount(self, parent=QModelIndex()):
		del parent
		return len(self.headers)

	def data(self, index, role=Qt.DisplayRole):
		if not index.isValid() or \
				not (0 <= index.row() < self.rowCount()) or \
				not (0 <= index.column() < self.columnCount()):
			return QVariant()

		if role == Qt.DisplayRole:
			return self.__data[index.row()][index.column()]

		if role == Qt.UserRole:
			return self.__data[index.row()][0]

		return QVariant()

	def headerData(self, section, orientation, role):
		if role != Qt.DisplayRole:
			return QVariant()

		if orientation == Qt.Horizontal:
			return self.headers[section]

		return section + 1

	def set_data(self, data):
		self.beginResetModel()

		del self.__data[:]

                # populate self.__data

		self.endResetModel()

		self.dataChanged.emit(self.index(0, 0), self.index(self.rowCount() - 1, self.columnCount() - 1))

[VRonin]

You are using reset model so you can connect to QAbstractItemModel::modelReset

[user4592357]

@VRonin
that's what i tried first

actually, the first time model is populated, the slot isn't invoked, but when it's populated 2nd time, the slot is invoked (with both signals)

[VRonin]

@user4592357 said in model populated signal:

the slot isn't invoked

from https://code.woboq.org/qt5/qtbase/src/corelib/itemmodels/qabstractitemmodel.cpp.html#_ZN18QAbstractItemModel13endResetModelEv:

void QAbstractItemModel::endResetModel()
{
    Q_D(QAbstractItemModel);
    d->invalidatePersistentIndexes();
    QMetaObject::invokeMethod(this, "resetInternalData");
    emit modelReset(QPrivateSignal());
}

[user4592357]

@VRonin
yeah

another weird thing: the 2nd time it's invoked, 3rd time it's invoked twice, 4th time - thrice, etc...

[VRonin]

Where are you connecting the signal? looks like you are connecting every time it's invoked

[user4592357]

@VRonin
my bad, right...

how didn't i realize? thanks