Lomiri
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lomirimenumodelcache.cpp
1/*
2 * Copyright 2013 Canonical Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as published by
6 * the Free Software Foundation; version 3.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *
16 * Authors:
17 * Nick Dedekind <nick.dedekind@canonical.com>
18 */
19
20#include "lomirimenumodelcache.h"
21#include <ayatanamenumodel.h>
22
23#include <QQmlEngine>
24
25QPointer<LomiriMenuModelCache> LomiriMenuModelCache::theCache = nullptr;
26
27LomiriMenuModelCache* LomiriMenuModelCache::singleton()
28{
29 if (theCache.isNull()) {
30 theCache = new LomiriMenuModelCache();
31 }
32 return theCache.data();
33}
34
35LomiriMenuModelCache::LomiriMenuModelCache(QObject* parent)
36 : QObject(parent)
37{
38}
39
40QSharedPointer<AyatanaMenuModel> LomiriMenuModelCache::model(const QByteArray& path)
41{
42 if (m_registry.contains(path))
43 return m_registry[path];
44
45 AyatanaMenuModel* model = new AyatanaMenuModel;
46 QQmlEngine::setObjectOwnership(model, QQmlEngine::CppOwnership);
47
48 QSharedPointer<AyatanaMenuModel> menuModel(model);
49
50 // Keep a shared pointer (rather than weak pointer which would cause the
51 // model to be deleted when all shared pointers we give out are deleted).
52 // We want to keep all models cached because when we switch indicator
53 // profiles, we will be switching paths often. And we want to keep the
54 // old model around, ready to be used. Otherwise the UI might momentarily
55 // wait as we populate the model from DBus yet again.
56 m_registry[path] = menuModel;
57
58 menuModel->setMenuObjectPath(path);
59 return menuModel;
60}
61
62bool LomiriMenuModelCache::contains(const QByteArray& path)
63{
64 return m_registry.contains(path);
65}