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Modify selection changed slot to deal with trips correctly

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If a user clicks on a trip, all the dives in a trip should be selected.
But if a user selects a range of dives that happens to have a trip header
in it, then only the range of dives should be selected (the trip header is
marked as 'selected' for visual consistency, even though not all dives in
this trip are selected).

This also changes the code to scrollTo the first selected dive instead of
just expanding the parent. This seems to give us a more pleasant visual
appearance (trying to keep the selected dive centered in the dive list)
and as a side effect no longer hides the first dive trip at program start
(before this change the first dive in the first trip would be the top
entry in the dive list, with its trip just out of sight above).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2013-05-12 06:38:47 -07:00
parent e69dbebf21
commit a180af3879
1 changed files with 65 additions and 3 deletions
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68
qt-ui/mainwindow.cpp
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@ -87,19 +87,81 @@ void MainWindow::on_actionOpen_triggered()
void MainWindow::dive_selection_changed(const QItemSelection& newSelection, const QItemSelection& oldSelection)
{
int cnt, i;
/* first deselect the dives that are no longer selected */
Q_FOREACH(const QModelIndex& desselect, oldSelection.indexes()) {
struct dive *d = (struct dive*) desselect.data(TreeItemDT::DIVE_ROLE).value<void*>();
Q_FOREACH(const QModelIndex& deselect, oldSelection.indexes()) {
struct dive *d = (struct dive*) deselect.data(TreeItemDT::DIVE_ROLE).value<void*>();
if (!d) {
// this is a trip - if just the trip is deselected but not its children,
// then we manually need to deselect its children
const QAbstractItemModel *model = deselect.model();
cnt = model->rowCount(deselect);
if (cnt == 0)
continue;
for (i = 0; i < cnt; i++) {
QModelIndex child = deselect.child(i,0);
if (oldSelection.contains(child))
break;
}
// if none of the dives were in the deselect list (so the user only ctrl-clicked
// on the trip header) then manually deselect all the dives
if (i == model->rowCount(deselect)) {
QItemSelectionModel::SelectionFlags flags = (QItemSelectionModel::Deselect |
QItemSelectionModel::Rows);
QItemSelection removedDives = QItemSelection();
removedDives.select(deselect.child(0,0), deselect.child(i - 1,0));
ui->ListWidget->selectionModel()->select(removedDives,flags);
}
}
if (!d || !d->selected)
continue;
deselect_dive(get_divenr(d));
}
/* then select the newly selected dives */
bool needToScroll = TRUE;
Q_FOREACH(const QModelIndex& select, newSelection.indexes()) {
struct dive *d = (struct dive*) select.data(TreeItemDT::DIVE_ROLE).value<void*>();
if (!d) {
// this is a trip
const QAbstractItemModel *model = select.model();
cnt = model->rowCount(select);
if (cnt == 0)
continue;
for (i = 0; i < cnt; i++) {
QModelIndex child = select.child(i,0);
if (newSelection.contains(child))
break;
}
// if just the trip header was clicked and none of its children,
// select all of them
if (i == model->rowCount(select)) {
if (needToScroll) {
// make sure the trip header is visible
needToScroll = FALSE;
ui->ListWidget->scrollTo(select, QAbstractItemView::PositionAtCenter);
}
QItemSelectionModel::SelectionFlags flags = (QItemSelectionModel::Select |
QItemSelectionModel::Rows);
QItemSelection addedDives = QItemSelection();
addedDives.select(select.child(0,0), select.child(i - 1,0));
ui->ListWidget->selectionModel()->select(addedDives,flags);
}
}
if (!d || d->selected)
continue;
select_dive(get_divenr(d));
if (needToScroll) {
// make sure at least one of them is visible in the list
// and if this is the first dive of a trip, make the trip visible, too
needToScroll = FALSE;
if (select.row() == 0 && d->divetrip && select.parent().isValid())
ui->ListWidget->scrollTo(select.parent(), QAbstractItemView::PositionAtCenter);
else
ui->ListWidget->scrollTo(select, QAbstractItemView::PositionAtCenter);
} else {
// but all selected dives should be in expanded trips
ui->ListWidget->expand(select.parent());
}
}
redrawProfile();
ui->InfoWidget->updateDiveInfo(selected_dive);
@ -352,7 +414,7 @@ void MainWindow::readSettings()
ui->ListWidget->resizeColumnToContents(i);
}
ui->ListWidget->collapseAll();
ui->ListWidget->expand(sortModel->index(0,0));
ui->ListWidget->scrollTo(sortModel->index(0,0), QAbstractItemView::PositionAtCenter);
settings.endGroup();
settings.beginGroup("Units");
GET_UNIT(v, "feet", length, units::METERS, units::FEET);