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1 | /* |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "globalsettings.hpp" | |
21 | ||
22 | namespace pv { | |
23 | ||
24 | const QString GlobalSettings::Key_View_AlwaysZoomToFit = "View_AlwaysZoomToFit"; | |
25 | const QString GlobalSettings::Key_View_ColouredBG = "View_ColouredBG"; | |
26 | ||
27 | std::multimap< QString, std::function<void(QVariant)> > GlobalSettings::callbacks_; | |
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28 | bool GlobalSettings::tracking_ = false; |
29 | std::map<QString, QVariant> GlobalSettings::tracked_changes_; | |
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30 | |
31 | GlobalSettings::GlobalSettings() : | |
32 | QSettings() | |
33 | { | |
34 | beginGroup("Settings"); | |
35 | } | |
36 | ||
37 | void GlobalSettings::register_change_handler(const QString key, | |
38 | std::function<void(QVariant)> cb) | |
39 | { | |
40 | callbacks_.emplace(key, cb); | |
41 | } | |
42 | ||
43 | void GlobalSettings::setValue(const QString &key, const QVariant &value) | |
44 | { | |
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45 | // Save previous value if we're tracking changes, |
46 | // not altering an already-existing saved setting | |
47 | if (tracking_) | |
48 | tracked_changes_.emplace(key, QSettings::value(key)); | |
49 | ||
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50 | QSettings::setValue(key, value); |
51 | ||
52 | // Call all registered callbacks for this key | |
53 | auto range = callbacks_.equal_range(key); | |
54 | ||
55 | for (auto it = range.first; it != range.second; it++) | |
56 | it->second(value); | |
57 | } | |
58 | ||
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59 | void GlobalSettings::start_tracking() |
60 | { | |
61 | tracking_ = true; | |
62 | tracked_changes_.clear(); | |
63 | } | |
64 | ||
65 | void GlobalSettings::stop_tracking() | |
66 | { | |
67 | tracking_ = false; | |
68 | tracked_changes_.clear(); | |
69 | } | |
70 | ||
71 | void GlobalSettings::undo_tracked_changes() | |
72 | { | |
73 | tracking_ = false; | |
74 | ||
75 | for (auto entry : tracked_changes_) | |
76 | setValue(entry.first, entry.second); | |
77 | ||
78 | tracked_changes_.clear(); | |
79 | } | |
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80 | |
81 | } // namespace pv |