]> sigrok.org Git - pulseview.git/blob - pv/globalsettings.cpp
Remove DecodeStack dependency from decode binding wrapper
[pulseview.git] / pv / globalsettings.cpp
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 using std::function;
23 using std::map;
24 using std::multimap;
25
26 namespace pv {
27
28 const QString GlobalSettings::Key_View_AlwaysZoomToFit = "View_AlwaysZoomToFit";
29 const QString GlobalSettings::Key_View_ColouredBG = "View_ColouredBG";
30 const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling";
31 const QString GlobalSettings::Key_View_ShowSamplingPoints = "View_ShowSamplingPoints";
32 const QString GlobalSettings::Key_View_ShowAnalogMinorGrid = "View_ShowAnalogMinorGrid";
33 const QString GlobalSettings::Key_Dec_InitialStateConfigurable = "Dec_InitialStateConfigurable";
34
35 multimap< QString, function<void(QVariant)> > GlobalSettings::callbacks_;
36 bool GlobalSettings::tracking_ = false;
37 map<QString, QVariant> GlobalSettings::tracked_changes_;
38
39 GlobalSettings::GlobalSettings() :
40         QSettings()
41 {
42         beginGroup("Settings");
43 }
44
45 void GlobalSettings::set_defaults_where_needed()
46 {
47         // Enable coloured trace backgrounds by default
48         if (!contains(Key_View_ColouredBG))
49                 setValue(Key_View_ColouredBG, true);
50 }
51
52 void GlobalSettings::register_change_handler(const QString key,
53         function<void(QVariant)> cb)
54 {
55         callbacks_.emplace(key, cb);
56 }
57
58 void GlobalSettings::setValue(const QString &key, const QVariant &value)
59 {
60         // Save previous value if we're tracking changes,
61         // not altering an already-existing saved setting
62         if (tracking_)
63                 tracked_changes_.emplace(key, QSettings::value(key));
64
65         QSettings::setValue(key, value);
66
67         // Call all registered callbacks for this key
68         auto range = callbacks_.equal_range(key);
69
70         for (auto it = range.first; it != range.second; it++)
71                 it->second(value);
72 }
73
74 void GlobalSettings::start_tracking()
75 {
76         tracking_ = true;
77         tracked_changes_.clear();
78 }
79
80 void GlobalSettings::stop_tracking()
81 {
82         tracking_ = false;
83         tracked_changes_.clear();
84 }
85
86 void GlobalSettings::undo_tracked_changes()
87 {
88         tracking_ = false;
89
90         for (auto entry : tracked_changes_)
91                 setValue(entry.first, entry.second);
92
93         tracked_changes_.clear();
94 }
95
96 } // namespace pv