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selection: move test for programmatical selection changes to widget

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The DiveListView widget has to differentiate between programmatical
und user-initiated selection changes. It did so by using the
DiveListNotifier::inCommand() flag.

However,
1) There is only one point of entry for such selection changes,
   viz. the MultiFilterSortModel::selectionChanged() signal
2) This signal is not only emitted in command-context.
   Another source is for example dive-map selection changes.

Therefore, move the programmatical-selection-change status down
to the widget and set/reset it in the diveSelectionChanged() slot.
This makes "select all visible dive sites" somewhat faster. Sadly,
not as much as expected.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2020-04-26 18:44:59 +02:00 • committed by Dirk Hohndel
parent aaecc6e98e
commit 5d49da5d6b
2 changed files with 10 additions and 2 deletions
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11
desktop-widgets/divelistview.cpp
View file

@ -32,7 +32,8 @@
DiveListView::DiveListView(QWidget *parent) : QTreeView(parent),
currentLayout(DiveTripModelBase::TREE),
initialColumnWidths(DiveTripModelBase::COLUMNS, 50) // Set up with default length 50
initialColumnWidths(DiveTripModelBase::COLUMNS, 50), // Set up with default length 50
programmaticalSelectionChange(false)
{
setItemDelegate(new DiveListDelegate(this));
setUniformRowHeights(true);
@ -201,6 +202,11 @@ void DiveListView::reset()
// If items were selected, inform the selection model
void DiveListView::diveSelectionChanged(const QVector<QModelIndex> &indices)
{
// This is the entry point for programmatical selection changes.
// Set a flag so that selection changes are not further processed,
// since the core structures were already set.
programmaticalSelectionChange = true;
clearSelection();
QItemSelectionModel *s = selectionModel();
for (const QModelIndex &index: indices) {
@ -215,6 +221,7 @@ void DiveListView::diveSelectionChanged(const QVector<QModelIndex> &indices)
}
selectionChangeDone();
programmaticalSelectionChange = false;
}
void DiveListView::currentDiveChanged(QModelIndex index)
@ -522,7 +529,7 @@ void DiveListView::selectionChangeDone()
void DiveListView::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
{
if (diveListNotifier.inCommand()) {
if (programmaticalSelectionChange) {
// This is a programmatical change of the selection.
// Call the QTreeView base function to reflect the selection in the display,
// but don't process it any further.

1
desktop-widgets/divelistview.h
View file

@ -86,6 +86,7 @@ private:
void contextMenuEvent(QContextMenuEvent *event) override;
void currentChanged(const QModelIndex &current, const QModelIndex &previous) override;
QNetworkAccessManager manager;
bool programmaticalSelectionChange;
};
#endif // DIVELISTVIEW_H