def editorEvent(
self,
event: QtCore.QEvent,
model: QtCore.QAbstractItemModel,
option: QStyleOptionViewItem,
index: QtCore.QModelIndex,
) -> bool:
"""Called when an event has occured in the editor.
This can be used to customize how the delegate handles mouse/key events
"""
if (event.type() == event.MouseButtonRelease
and event.button() == Qt.RightButton):
self.show_context_menu(index, model, event.globalPos(),
option.widget)
# if the user clicks quickly on the visibility checkbox, we *don't*
# want it to be interpreted as a double-click. We want the visibilty
# to simply be toggled.
if event.type() == event.MouseButtonDblClick:
self.initStyleOption(option, index)
style = option.widget.style()
check_rect = style.subElementRect(
style.SE_ItemViewItemCheckIndicator, option, option.widget)
if check_rect.contains(event.pos()):
cur_state = index.data(Qt.CheckStateRole)
if model.flags(index) & Qt.ItemIsUserTristate:
state = Qt.CheckState((cur_state + 1) % 3)
else:
state = Qt.Unchecked if cur_state else Qt.Checked
return model.setData(index, state, Qt.CheckStateRole)
# refer all other events to the QStyledItemDelegate
return super().editorEvent(event, model, option, index)
def flags(self, index):
"""Read-only."""
if not index.isValid():
return 0
return QAbstractItemModel.flags(self, index)
def flags(self, index):
"""Override to make cells editable."""
if not index.isValid():
return Qt.ItemIsEnabled
return QAbstractItemModel.flags(self, index)