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This commit is contained in:
Thibault Deckers 2023-03-11 14:13:14 +01:00
parent 39d35c40be
commit 0472cb23f6
1 changed files with 11 additions and 7 deletions
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18
lib/widgets/common/grid/selector.dart
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@ -206,30 +206,34 @@ class _GridSelectionGestureDetectorState<T> extends State<GridSelectionGestureDe
void _toggleSelectionToIndex(int toIndex) {
if (toIndex == -1) return;
Iterable<T> getRange(int start, int end) => items.getRange(start, end);
final selection = context.read<Selection<T>>();
void addRange(int start, int end) => selection.addToSelection(getRange(start, end));
void removeRange(int start, int end) => selection.removeFromSelection(getRange(start, end));
if (_selecting) {
if (toIndex <= _fromIndex) {
if (toIndex < _lastToIndex) {
selection.addToSelection(items.getRange(toIndex, min(_fromIndex, _lastToIndex)));
addRange(toIndex, min(_fromIndex, _lastToIndex));
if (_fromIndex < _lastToIndex) {
selection.removeFromSelection(items.getRange(_fromIndex + 1, _lastToIndex + 1));
removeRange(_fromIndex + 1, _lastToIndex + 1);
}
} else if (_lastToIndex < toIndex) {
selection.removeFromSelection(items.getRange(_lastToIndex, toIndex));
removeRange(_lastToIndex, toIndex);
}
} else if (_fromIndex < toIndex) {
if (_lastToIndex < toIndex) {
selection.addToSelection(items.getRange(max(_fromIndex, _lastToIndex), toIndex + 1));
addRange(max(_fromIndex, _lastToIndex), toIndex + 1);
if (_lastToIndex < _fromIndex) {
selection.removeFromSelection(items.getRange(_lastToIndex, _fromIndex));
removeRange(_lastToIndex, _fromIndex);
}
} else if (toIndex < _lastToIndex) {
selection.removeFromSelection(items.getRange(toIndex + 1, _lastToIndex + 1));
removeRange(toIndex + 1, _lastToIndex + 1);
}
}
_lastToIndex = toIndex;
} else {
selection.removeFromSelection(items.getRange(min(_fromIndex, toIndex), max(_fromIndex, toIndex) + 1));
removeRange(min(_fromIndex, toIndex), max(_fromIndex, toIndex) + 1);
}
}
}