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/*
ExpandStatesHelper.cpp
This file is part of Charm, a task-based time tracking application.
Copyright (C) 2014-2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
Author: Frank Osterfeld <frank.osterfeld@kdab.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ExpandStatesHelper.h"
#include "TaskModelAdapter.h"
#include <QTreeView>
static void saveChildExpandStates(const QModelIndex &idx, QTreeView *tv, QHash<TaskId, bool> *map)
{
const int rc = idx.model()->rowCount(idx);
for (int i = 0; i < rc; ++i) {
const QModelIndex c = idx.child(i, 0);
if (c.model()->rowCount(c) > 0) {
const TaskId id = c.data(TasksViewRole_TaskId).toInt();
const bool expanded = tv->isExpanded(c);
map->insert(id, expanded);
if (expanded)
saveChildExpandStates(c, tv, map);
}
}
}
static void restoreChildExpandStates(const QModelIndex &idx, QTreeView *tv,
QHash<TaskId, bool> *map)
{
const int rc = idx.model()->rowCount(idx);
for (int i = 0; i < rc; ++i) {
const QModelIndex c = idx.child(i, 0);
if (c.model()->rowCount(c) > 0) {
const TaskId id = c.data(TasksViewRole_TaskId).toInt();
const bool expanded = map->value(id);
tv->setExpanded(c, expanded);
restoreChildExpandStates(c, tv, map);
}
}
}
void Charm::saveExpandStates(QTreeView *tv, QHash<TaskId, bool> *map)
{
if (!tv->model())
return;
if (tv->model()->rowCount() == 0)
return;
const QModelIndex root = tv->model()->index(0, 0, QModelIndex());
const TaskId id = root.data(TasksViewRole_TaskId).toInt();
const bool expanded = tv->isExpanded(root);
map->insert(id, expanded);
saveChildExpandStates(root, tv, map);
}
void Charm::restoreExpandStates(QTreeView *tv, QHash<TaskId, bool> *map)
{
if (!tv->model())
return;
if (tv->model()->rowCount() == 0)
return;
const QModelIndex root = tv->model()->index(0, 0, QModelIndex());
const TaskId id = root.data(TasksViewRole_TaskId).toInt();
const bool expand = map->value(id);
tv->setExpanded(root, expand);
restoreChildExpandStates(root, tv, map);
}
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