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 #include <QApplication>
  23 #include <QFontMetrics>
  24 #include <QString>
  25
  26 using std::map;
  27 using std::vector;
  28
  29 namespace pv {
  30
  31 const QString GlobalSettings::Key_View_ZoomToFitDuringAcq = "View_ZoomToFitDuringAcq";
  32 const QString GlobalSettings::Key_View_ZoomToFitAfterAcq = "View_ZoomToFitAfterAcq";
  33 const QString GlobalSettings::Key_View_TriggerIsZeroTime = "View_TriggerIsZeroTime";
  34 const QString GlobalSettings::Key_View_ColouredBG = "View_ColouredBG";
  35 const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling";
  36 const QString GlobalSettings::Key_View_ShowSamplingPoints = "View_ShowSamplingPoints";
  37 const QString GlobalSettings::Key_View_ShowAnalogMinorGrid = "View_ShowAnalogMinorGrid";
  38 const QString GlobalSettings::Key_View_ConversionThresholdDispMode = "View_ConversionThresholdDispMode";
  39 const QString GlobalSettings::Key_View_DefaultDivHeight = "View_DefaultDivHeight";
  40 const QString GlobalSettings::Key_View_DefaultLogicHeight = "View_DefaultLogicHeight";
  41 const QString GlobalSettings::Key_Dec_InitialStateConfigurable = "Dec_InitialStateConfigurable";
  42 const QString GlobalSettings::Key_Log_BufferSize = "Log_BufferSize";
  43
  44 vector<GlobalSettingsInterface*> GlobalSettings::callbacks_;
  45 bool GlobalSettings::tracking_ = false;
  46 map<QString, QVariant> GlobalSettings::tracked_changes_;
  47
  48 GlobalSettings::GlobalSettings() :
  49         QSettings()
  50 {
  51         beginGroup("Settings");
  52 }
  53
  54 void GlobalSettings::set_defaults_where_needed()
  55 {
  56         // Enable zoom-to-fit after acquisition by default
  57         if (!contains(Key_View_ZoomToFitAfterAcq))
  58                 setValue(Key_View_ZoomToFitAfterAcq, true);
  59
  60         // Enable coloured trace backgrounds by default
  61         if (!contains(Key_View_ColouredBG))
  62                 setValue(Key_View_ColouredBG, true);
  63
  64         // Enable showing sampling points by default
  65         if (!contains(Key_View_ShowSamplingPoints))
  66                 setValue(Key_View_ShowSamplingPoints, true);
  67
  68         if (!contains(Key_View_DefaultDivHeight))
  69                 setValue(Key_View_DefaultDivHeight,
  70                 3 * QFontMetrics(QApplication::font()).height());
  71
  72         if (!contains(Key_View_DefaultLogicHeight))
  73                 setValue(Key_View_DefaultLogicHeight,
  74                 2 * QFontMetrics(QApplication::font()).height());
  75
  76         // Default to 500 lines of backlog
  77         if (!contains(Key_Log_BufferSize))
  78                 setValue(Key_Log_BufferSize, 500);
  79 }
  80
  81 void GlobalSettings::add_change_handler(GlobalSettingsInterface *cb)
  82 {
  83         callbacks_.push_back(cb);
  84 }
  85
  86 void GlobalSettings::remove_change_handler(GlobalSettingsInterface *cb)
  87 {
  88         for (auto cb_it = callbacks_.begin(); cb_it != callbacks_.end(); cb_it++)
  89                 if (*cb_it == cb) {
  90                         callbacks_.erase(cb_it);
  91                         break;
  92                 }
  93 }
  94
  95 void GlobalSettings::setValue(const QString &key, const QVariant &value)
  96 {
  97         // Save previous value if we're tracking changes,
  98         // not altering an already-existing saved setting
  99         if (tracking_)
 100                 tracked_changes_.emplace(key, QSettings::value(key));
 101
 102         QSettings::setValue(key, value);
 103
 104         // Call all registered callbacks
 105         for (GlobalSettingsInterface *cb : callbacks_)
 106                 cb->on_setting_changed(key, value);
 107 }
 108
 109 void GlobalSettings::start_tracking()
 110 {
 111         tracking_ = true;
 112         tracked_changes_.clear();
 113 }
 114
 115 void GlobalSettings::stop_tracking()
 116 {
 117         tracking_ = false;
 118         tracked_changes_.clear();
 119 }
 120
 121 void GlobalSettings::undo_tracked_changes()
 122 {
 123         tracking_ = false;
 124
 125         for (auto entry : tracked_changes_)
 126                 setValue(entry.first, entry.second);
 127
 128         tracked_changes_.clear();
 129 }
 130
 131 void GlobalSettings::store_gvariant(QSettings &settings, GVariant *v)
 132 {
 133         const GVariantType *var_type = g_variant_get_type(v);
 134         char *var_type_str = g_variant_type_dup_string(var_type);
 135
 136         QByteArray var_data = QByteArray((const char*)g_variant_get_data(v),
 137                 g_variant_get_size(v));
 138
 139         settings.setValue("value", var_data);
 140         settings.setValue("type", var_type_str);
 141
 142         g_free(var_type_str);
 143 }
 144
 145 GVariant* GlobalSettings::restore_gvariant(QSettings &settings)
 146 {
 147         QString raw_type = settings.value("type").toString();
 148         GVariantType *var_type = g_variant_type_new(raw_type.toUtf8());
 149
 150         QByteArray data = settings.value("value").toByteArray();
 151
 152         gpointer var_data = g_memdup((gconstpointer)data.constData(),
 153                 (guint)data.size());
 154
 155         GVariant *value = g_variant_new_from_data(var_type, var_data,
 156                 data.size(), false, g_free, var_data);
 157
 158         g_variant_type_free(var_type);
 159
 160         return value;
 161 }
 162
 163
 164 } // namespace pv