Qt QTableView - Alignment of checkbox when using IsUserCheckable

Question

I am using QTableView\'s checkbox flag of Qt::ItemIsUserCheckable to display a checkbox in a table cell.

After reading some things on alignment in an attempt to

Answer 1

Solution for Python (PySide, PyQt) to center the checkbox and with editable allowed:

class BooleanDelegate(QItemDelegate):

    def __init__(self, *args, **kwargs):
        super(BooleanDelegate, self).__init__(*args, **kwargs)

    def paint(self, painter, option, index):
        # Depends on how the data function of your table model is implemented
        # 'value' should recive a bool indicate if the checked value.
        value = index.data(Qt.CheckStateRole)  
        self.drawCheck(painter, option, option.rect, value)
        self.drawFocus(painter, option, option.rect)

    def editorEvent(self, event, model, option, index):
        if event.type() == QEvent.MouseButtonRelease:
            value = bool(model.data(index, Qt.CheckStateRole))
            model.setData(index, not value)
            event.accept()
        return super(BooleanDelegate, self).editorEvent(event, model, option, index)

In your table model, make sure that the flags allow the user to check/uncheck the cell.

class MyTableModel(QAbstractTableModel):

    ...

    def flags(self, index):
        if not index.isValid():
            return Qt.ItemIsEnabled
        if index.column() in self.columns_boolean:
            return Qt.ItemIsEnabled | Qt.ItemIsUserCheckable
        return Qt.ItemFlags(QAbstractTableModel.flags(self, index) | Qt.ItemIsEditable)

Finally, set the BooleanDelagate in your table

self.boolean_delegate = BooleanDelegate()
self.input_gui.setItemDelegateForColumn(5, self.boolean_delegate)