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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 | const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling"; | |
27 | const QString GlobalSettings::Key_View_ShowSamplingPoints = "View_ShowSamplingPoints"; | |
28 | ||
29 | std::multimap< QString, std::function<void(QVariant)> > GlobalSettings::callbacks_; | |
30 | bool GlobalSettings::tracking_ = false; | |
31 | std::map<QString, QVariant> GlobalSettings::tracked_changes_; | |
32 | ||
33 | GlobalSettings::GlobalSettings() : | |
34 | QSettings() | |
35 | { | |
36 | beginGroup("Settings"); | |
37 | } | |
38 | ||
39 | void GlobalSettings::register_change_handler(const QString key, | |
40 | std::function<void(QVariant)> cb) | |
41 | { | |
42 | callbacks_.emplace(key, cb); | |
43 | } | |
44 | ||
45 | void GlobalSettings::setValue(const QString &key, const QVariant &value) | |
46 | { | |
47 | // Save previous value if we're tracking changes, | |
48 | // not altering an already-existing saved setting | |
49 | if (tracking_) | |
50 | tracked_changes_.emplace(key, QSettings::value(key)); | |
51 | ||
52 | QSettings::setValue(key, value); | |
53 | ||
54 | // Call all registered callbacks for this key | |
55 | auto range = callbacks_.equal_range(key); | |
56 | ||
57 | for (auto it = range.first; it != range.second; it++) | |
58 | it->second(value); | |
59 | } | |
60 | ||
61 | void GlobalSettings::start_tracking() | |
62 | { | |
63 | tracking_ = true; | |
64 | tracked_changes_.clear(); | |
65 | } | |
66 | ||
67 | void GlobalSettings::stop_tracking() | |
68 | { | |
69 | tracking_ = false; | |
70 | tracked_changes_.clear(); | |
71 | } | |
72 | ||
73 | void GlobalSettings::undo_tracked_changes() | |
74 | { | |
75 | tracking_ = false; | |
76 | ||
77 | for (auto entry : tracked_changes_) | |
78 | setValue(entry.first, entry.second); | |
79 | ||
80 | tracked_changes_.clear(); | |
81 | } | |
82 | ||
83 | } // namespace pv |