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Cleanup: remove DiveListView::expandedRows member variable

The QList served as backing store for backupExpandedRows()
and restoreExpandedRows(). However, these always came in
pairs in the same scope. There is no reason to store the
expanded rows over a longer time.

Therefore, return the expanded rows from backupExpandedRows()
and take them as argument in restoreExpandedRows(). Morover
replace the QList<int> by the much lighter std::vector<int>.
We certainly don't need copy-on-write, reference-counting and
immutability of iterators in this case.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2019-11-28 21:55:26 +01:00 committed by bstoeger
parent be26b0bd9a
commit 28e97e7555
2 changed files with 13 additions and 12 deletions

View file

@ -135,7 +135,7 @@ void DiveListView::calculateInitialColumnWidth(int col)
void DiveListView::setColumnWidths()
{
QSettings settings;
backupExpandedRows();
std::vector<int> expandedRows = backupExpandedRows();
settings.beginGroup("ListWidget");
/* if no width are set, use the calculated width for each column;
* for that to work we need to temporarily expand all rows */
@ -150,7 +150,7 @@ void DiveListView::setColumnWidths()
setColumnWidth(i, initialColumnWidths[i]);
}
settings.endGroup();
restoreExpandedRows();
restoreExpandedRows(expandedRows);
setColumnWidth(lastVisibleColumn(), 10);
}
@ -165,18 +165,19 @@ int DiveListView::lastVisibleColumn()
return lastColumn;
}
void DiveListView::backupExpandedRows()
std::vector<int> DiveListView::backupExpandedRows()
{
expandedRows.clear();
std::vector<int> expandedRows;
for (int i = 0; i < model()->rowCount(); i++)
if (isExpanded(model()->index(i, 0)))
expandedRows.push_back(i);
return expandedRows;
}
void DiveListView::restoreExpandedRows()
void DiveListView::restoreExpandedRows(const std::vector<int> &expandedRows)
{
setAnimated(false);
Q_FOREACH (const int &i, expandedRows)
for (int i: expandedRows)
setExpanded(model()->index(i, 0), true);
setAnimated(true);
}
@ -437,13 +438,14 @@ void DiveListView::sortIndicatorChanged(int i, Qt::SortOrder order)
sortByColumn(i, order);
} else {
// clear the model, repopulate with new indexes.
std::vector<int> expandedRows;
if(currentLayout == DiveTripModelBase::TREE)
backupExpandedRows();
expandedRows = backupExpandedRows();
currentLayout = newLayout;
resetModel();
sortByColumn(i, order);
if (newLayout == DiveTripModelBase::TREE)
restoreExpandedRows();
restoreExpandedRows(expandedRows);
}
}

View file

@ -69,7 +69,6 @@ private:
void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags) override;
void selectAll() override;
void selectionChangeDone();
QList<int> expandedRows;
DiveTripModelBase::Layout currentLayout;
QModelIndex contextMenuIndex;
bool dontEmitDiveChangedSignal;
@ -80,8 +79,8 @@ private:
void merge_trip(const QModelIndex &a, const int offset);
void setColumnWidths();
void calculateInitialColumnWidth(int col);
void backupExpandedRows();
void restoreExpandedRows();
std::vector<int> backupExpandedRows();
void restoreExpandedRows(const std::vector<int> &);
int lastVisibleColumn();
void selectTrip(dive_trip *trip);
void updateLastImageTimeOffset(int offset);