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Calculate len_selection depending on modifiers

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If no modifiers are pressed, a single row has probably been clicked and
`selectedRows()` is fast, while a lot of rows might have been deselcted.
This commit is contained in:
RumovZ 2021-09-28 10:22:20 +02:00
parent 287854d014
commit eac8972a28
1 changed files with 11 additions and 2 deletions
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13
qt/aqt/browser/table/table.py
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@ -355,8 +355,17 @@ class Table:
def _on_selection_changed( def _on_selection_changed(
self, selected: QItemSelection, deselected: QItemSelection self, selected: QItemSelection, deselected: QItemSelection
) -> None: ) -> None:
self._len_selection += len(selected.indexes()) // self._model.len_columns() # `selection.indexes()` calls `flags()` for all the selection's indexes,
self._len_selection -= len(deselected.indexes()) // self._model.len_columns() # whereas `selectedRows()` calls it for the indexes of the resulting selection.
# Both may be slow, so we try to optimise.
if KeyboardModifiersPressed().shift or KeyboardModifiersPressed().control:
# Current selection is modified. The number of added/removed rows is
# usually smaller than the number of rows in the resulting selection.
self._len_selection += len(selected.indexes()) // self._model.len_columns()
self._len_selection -= len(deselected.indexes()) // self._model.len_columns()
else:
# New selection is created. Usually a single row or none at all.
self._len_selection = len(self._view.selectionModel().selectedRows())
self.browser.on_row_changed() self.browser.on_row_changed()
def _on_row_state_will_change(self, index: QModelIndex, was_restored: bool) -> None: def _on_row_state_will_change(self, index: QModelIndex, was_restored: bool) -> None: