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copied!<p>you need to hold somewhere current item state (checked\unchecked) and change it once setdata() method is called. Your items are always unchecked because you're always returning <code>QVariant(Qt.Unchecked)</code> for them in the data() method. </p> <p>I've changed a bit your code, see it would work for you:</p> <pre><code>import sys from PyQt4.QtCore import * from PyQt4.QtGui import * class TestItem(): def __init__(self, name, checked): self.checked = checked self.name = name class StbTreeView(QAbstractListModel): def __init__(self, args, parent=None): super(StbTreeView, self).__init__(parent) self.args = [] for item_name in args: self.args.append(TestItem(item_name, False)) for item in self.args: print item.name def rowCount(self, parent): return len(self.args) def headerData(self, section, orientation, role): if role == Qt.DisplayRole: if orientation == Qt.Horizontal: return QString("Select STB's") def flags(self, index): return Qt.ItemIsUserCheckable | Qt.ItemIsEditable | Qt.ItemIsSelectable | Qt.ItemIsEnabled def data(self, index, role=Qt.DisplayRole): if role == Qt.DisplayRole: row = index.row() print self.args[row].name return self.args[row].name if role == Qt.CheckStateRole: row = index.row() print self.args[row].checked if self.args[row].checked == False: return QVariant(Qt.Unchecked) else: return QVariant(Qt.Checked) def setData(self, index, value, role): if role == Qt.CheckStateRole: row = index.row() self.args[row].checked = not self.args[row].checked return True def main(): myapp = QApplication(sys.argv) data = ['STB1', 'STB2', 'STB3', 'STB4', 'STB5', 'STB6', 'STB7', 'STB8'] model = StbTreeView(data) tree_view = QTreeView() tree_view.show() tree_view.setModel(model) myapp.exec_() if __name__ == '__main__': main() </code></pre> <p>hope this helps, regards</p>

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