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Cleanup: remove DiveListView::expandedRows member variable

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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

18
desktop-widgets/divelistview.cpp
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);
}
}

5
desktop-widgets/divelistview.h
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);