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Dive list: invert sort-direction to reflect core

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Traditionally, the DiveTripModel has its data sorted in opposite
direction to the core-data (chronologically descending vs. ascending).
This bring a number of subtle problems. For example, when filling
the model, trips are filled according to the *last* dive, whereas
later insertion points are according to the ->when value from the
core, which depends on the *first* dive.

As a start of fixing these subtleties, change the sort direction
to reflect the core-data. Ideally, this should lead to a removal
of the redundant data-representation.

Since the model is now sorted in ascending order, sorting has to
be enabled in the DiveListView constructor to reflect the
default-descending order.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-11-06 21:48:18 +01:00 • committed by Dirk Hohndel
parent 1aef22116c
commit 7046c8b342
2 changed files with 16 additions and 41 deletions
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2
desktop-widgets/divelistview.cpp
View file

@ -35,7 +35,7 @@ DiveListView::DiveListView(QWidget *parent) : QTreeView(parent), mouseClickSelec
setItemDelegateForColumn(DiveTripModel::RATING, new StarWidgetsDelegate(this));
setModel(MultiFilterSortModel::instance());
setSortingEnabled(false);
setSortingEnabled(true);
setContextMenuPolicy(Qt::DefaultContextMenu);
setSelectionMode(ExtendedSelection);
header()->setContextMenuPolicy(Qt::ActionsContextMenu);

55
qt-models/divetripmodel.cpp
View file

@ -557,12 +557,10 @@ void processRangesZip(Vector1 &items1, Vector2 &items2, Predicate cond, Action a
void DiveTripModel::setupModelData()
{
int i = dive_table.nr;
beginResetModel();
items.clear();
while (--i >= 0) {
for (int i = 0; i < dive_table.nr ; ++i) {
dive *d = get_dive(i);
update_cylinder_related_info(d);
dive_trip_t *trip = d->divetrip;
@ -690,7 +688,7 @@ int DiveTripModel::findDiveInTrip(int tripIdx, const dive *d) const
int DiveTripModel::findInsertionIndex(timestamp_t when) const
{
for (int i = 0; i < (int)items.size(); ++i) {
if (when > items[i].when())
if (when <= items[i].when())
return i;
}
return items.size();
@ -741,7 +739,7 @@ void DiveTripModel::addDivesToTrip(int trip, const QVector<dive *> &dives)
// Either this is outside of a trip or we're in list mode.
// Thus, add dives at the top-level in batches
addInBatches(items[trip].dives, dives,
[](dive *d, dive *d2) { return !dive_less_than(d, d2); }, // comp
[](dive *d, dive *d2) { return dive_less_than(d, d2); }, // comp
[&](std::vector<dive *> &items, const QVector<dive *> &dives, int idx, int from, int to) { // inserter
beginInsertRows(parent, idx, idx + to - from - 1);
items.insert(items.begin() + idx, dives.begin() + from, dives.begin() + to);
@ -756,20 +754,15 @@ void DiveTripModel::addDivesToTrip(int trip, const QVector<dive *> &dives)
// before the trip in the case of equal timestamps.
bool DiveTripModel::dive_before_entry(const dive *d, const Item &entry)
{
// Dives at the same time come before trips, therefore use the ">=" operator.
// Dives at the same time come afer trips in ascending mode, therefore use the "<" operator.
// This makes them appear as before trips in descending mode.
if (entry.trip)
return d->when >= entry.trip->when;
return !dive_less_than(d, entry.getDive());
return d->when < entry.trip->when;
return dive_less_than(d, entry.getDive());
}
void DiveTripModel::divesAdded(dive_trip *trip, bool addTrip, const QVector<dive *> &divesIn)
void DiveTripModel::divesAdded(dive_trip *trip, bool addTrip, const QVector<dive *> &dives)
{
// The dives come from the backend sorted by start-time. But our model is sorted
// reverse-chronologically. Therefore, invert the list.
// TODO: Change sorting of the model to reflect core!
QVector<dive *> dives = divesIn;
std::reverse(dives.begin(), dives.end());
if (!trip || currentLayout == LIST) {
// Either this is outside of a trip or we're in list mode.
// Thus, add dives at the top-level in batches
@ -806,13 +799,8 @@ void DiveTripModel::divesAdded(dive_trip *trip, bool addTrip, const QVector<dive
}
}
void DiveTripModel::divesDeleted(dive_trip *trip, bool deleteTrip, const QVector<dive *> &divesIn)
void DiveTripModel::divesDeleted(dive_trip *trip, bool deleteTrip, const QVector<dive *> &dives)
{
// TODO: dives comes sorted by ascending time, but the model is sorted by descending time.
// Instead of being smart, simply reverse the input array.
QVector<dive *> dives = divesIn;
std::reverse(dives.begin(), dives.end());
if (!trip || currentLayout == LIST) {
// Either this is outside of a trip or we're in list mode.
// Thus, delete top-level dives. We do this range-wise.
@ -861,13 +849,8 @@ void DiveTripModel::divesDeleted(dive_trip *trip, bool deleteTrip, const QVector
}
}
void DiveTripModel::divesChanged(dive_trip *trip, const QVector<dive *> &divesIn)
void DiveTripModel::divesChanged(dive_trip *trip, const QVector<dive *> &dives)
{
// TODO: dives comes sorted by ascending time, but the model is sorted by descending time.
// Instead of being smart, simply reverse the input array.
QVector<dive *> dives = divesIn;
std::reverse(dives.begin(), dives.end());
if (!trip || currentLayout == LIST) {
// Either this is outside of a trip or we're in list mode.
// Thus, these are top-level dives. We do this range-wise.
@ -964,13 +947,8 @@ void DiveTripModel::divesDeselected(dive_trip *trip, const QVector<dive *> &dive
changeDiveSelection(trip, dives, false);
}
void DiveTripModel::changeDiveSelection(dive_trip *trip, const QVector<dive *> &divesIn, bool select)
void DiveTripModel::changeDiveSelection(dive_trip *trip, const QVector<dive *> &dives, bool select)
{
// TODO: dives comes sorted by ascending time, but the model is sorted by descending time.
// Instead of being smart, simply reverse the input array.
QVector<dive *> dives = divesIn;
std::reverse(dives.begin(), dives.end());
// We got a number of dives that have been selected. Turn this into QModelIndexes and
// emit a signal, so that views can change the selection.
QVector<QModelIndex> indexes;
@ -1087,9 +1065,7 @@ bool DiveTripModel::lessThan(const QModelIndex &i1, const QModelIndex &i2) const
if (currentLayout != LIST) {
// In tree mode we don't support any sorting!
// Simply keep the original position.
// Note that the model is filled in reverse order, therefore
// ascending means sorting in descending order. TODO: fix.
return i1.row() > i2.row();
return i1.row() < i2.row();
}
// We assume that i1.column() == i2.column().
@ -1100,14 +1076,13 @@ bool DiveTripModel::lessThan(const QModelIndex &i1, const QModelIndex &i2) const
return false;
const dive *d1 = items[i1.row()].dives[0];
const dive *d2 = items[i2.row()].dives[0];
int row_diff = row1 - row2;
// This is used as a second sort criterion: For equal values, sorting is chronologically *descending*.
int row_diff = row2 - row1;
switch (i1.column()) {
case NR:
case DATE:
default:
// Note that the model is filled in reverse order, therefore
// ascending means sorting in descending order. TODO: fix.
return row1 > row2;
return row1 < row2;
case RATING:
return lessThanHelper(d1->rating - d2->rating, row_diff);
case DEPTH: