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Dive list: move dive-selection code from filter to list

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After invalidating the filter, the dive-selection was modified to
ensure that at least one dive is selected. This was done in the
filter code, but it seems preferrable to do this in the dive-list
code, which has direct access to the selection-model.

Therefore, move the code from MultiFilterSortModel to DiveListView.
While doing so, split the code in DiveListView into more functions to:
1) Get the index of the first dive (if any).
2) Select the first dive (if any).

This allows a distinct size reduction of conditional compilation
in MultiFilterSortModel (accesses to MainWindow are not possible
in mobile code).

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2018-10-20 11:56:06 +02:00 • committed by Lubomir I. Ivanov
parent 2f81890f49
commit 9829e49815
3 changed files with 62 additions and 47 deletions
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75
desktop-widgets/divelistview.cpp
View file

@ -47,6 +47,9 @@ DiveListView::DiveListView(QWidget *parent) : QTreeView(parent), mouseClickSelec
connect(DiveTripModel::instance(), &DiveTripModel::selectionChanged, this, &DiveListView::diveSelectionChanged);
connect(DiveTripModel::instance(), &DiveTripModel::newCurrentDive, this, &DiveListView::currentDiveChanged);
// Update selection if all selected dives were hidden by filter
connect(MultiFilterSortModel::instance(), &MultiFilterSortModel::filterFinished, this, &DiveListView::filterFinished);
header()->setStretchLastSection(true);
installEventFilter(this);
@ -349,17 +352,11 @@ QList<dive_trip_t *> DiveListView::selectedTrips()
return ret;
}
void DiveListView::selectDive(int i, bool scrollto, bool toggle)
void DiveListView::selectDive(QModelIndex idx, bool scrollto, bool toggle)
{
if (i == -1)
if (!idx.isValid())
return;
QSortFilterProxyModel *m = qobject_cast<QSortFilterProxyModel *>(model());
QModelIndexList match = m->match(m->index(0, 0), DiveTripModel::DIVE_IDX, i, 2, Qt::MatchRecursive);
QItemSelectionModel::SelectionFlags flags;
if (match.isEmpty())
return;
QModelIndex idx = match.first();
flags = toggle ? QItemSelectionModel::Toggle : QItemSelectionModel::Select;
QItemSelectionModel::SelectionFlags flags = toggle ? QItemSelectionModel::Toggle : QItemSelectionModel::Select;
flags |= QItemSelectionModel::Rows;
selectionModel()->setCurrentIndex(idx, flags);
if (idx.parent().isValid()) {
@ -373,6 +370,18 @@ void DiveListView::selectDive(int i, bool scrollto, bool toggle)
scrollTo(idx, PositionAtCenter);
}
void DiveListView::selectDive(int i, bool scrollto, bool toggle)
{
if (i == -1)
return;
QSortFilterProxyModel *m = qobject_cast<QSortFilterProxyModel *>(model());
QModelIndexList match = m->match(m->index(0, 0), DiveTripModel::DIVE_IDX, i, 2, Qt::MatchRecursive);
if (match.isEmpty())
return;
QModelIndex idx = match.first();
selectDive(idx, scrollto, toggle);
}
void DiveListView::selectDives(const QList<int> &newDiveSelection)
{
int firstInList, newSelection;
@ -416,6 +425,28 @@ void DiveListView::selectDives(const QList<int> &newDiveSelection)
return;
}
// Get index of first dive. This assumes that trips without dives are never shown.
// May return an invalid index if no dive is found.
QModelIndex DiveListView::indexOfFirstDive()
{
// Fetch the first top-level item. If this is a trip, it is supposed to have at least
// one child. In that case return the child. Otherwise return the top-level item, which
// should be a dive.
QAbstractItemModel *m = model();
QModelIndex firstDiveOrTrip = m->index(0, 0);
if (!firstDiveOrTrip.isValid())
return QModelIndex();
QModelIndex child = m->index(0, 0, firstDiveOrTrip);
return child.isValid() ? child : firstDiveOrTrip;
}
void DiveListView::selectFirstDive()
{
QModelIndex first = indexOfFirstDive();
if (first.isValid())
setCurrentIndex(first);
}
bool DiveListView::eventFilter(QObject *, QEvent *event)
{
if (event->type() != QEvent::KeyPress)
@ -476,19 +507,11 @@ void DiveListView::reload(DiveTripModel::Layout layout, bool forceSort)
if (!forceSort)
return;
QSortFilterProxyModel *m = qobject_cast<QSortFilterProxyModel *>(model());
sortByColumn(sortColumn, currentOrder);
if (amount_selected && current_dive != NULL) {
if (amount_selected && current_dive != NULL)
selectDive(get_divenr(current_dive), true);
} else {
QModelIndex firstDiveOrTrip = m->index(0, 0);
if (firstDiveOrTrip.isValid()) {
if (m->index(0, 0, firstDiveOrTrip).isValid())
setCurrentIndex(m->index(0, 0, firstDiveOrTrip));
else
setCurrentIndex(firstDiveOrTrip);
}
}
else
selectFirstDive();
if (selectedIndexes().count()) {
QModelIndex curr = selectedIndexes().first();
curr = curr.parent().isValid() ? curr.parent() : curr;
@ -1029,6 +1052,18 @@ void DiveListView::loadImageFromURL(QUrl url)
}
}
void DiveListView::filterFinished()
{
// first make sure the trips are no longer shown as selected
// (but without updating the selection state of the dives... this just cleans
// up an oddity in the filter handling)
clearTripSelection();
// If there are no more selected dives, select the first visible dive
if (!selectionModel()->hasSelection())
selectFirstDive();
}
QString DiveListView::lastUsedImageDir()
{
QSettings settings;