[pulseview.git] / pv / globalsettings.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "globalsettings.hpp"

#include <QApplication>
#include <QColor>
#include <QDebug>
#include <QFile>
#include <QFontMetrics>
#include <QPixmapCache>
#include <QString>
#include <QStyle>
#include <QtGlobal>

using std::map;
using std::pair;
using std::string;
using std::vector;

namespace pv {

const vector< pair<QString, QString> > Themes {
	{"None" , ""},
	{"QDarkStyleSheet", ":/themes/qdarkstyle/style.qss"},
	{"DarkStyle", ":/themes/darkstyle/darkstyle.qss"}
};

const QString GlobalSettings::Key_General_Theme = "General_Theme";
const QString GlobalSettings::Key_General_Style = "General_Style";
const QString GlobalSettings::Key_General_SaveWithSetup = "General_SaveWithSetup";
const QString GlobalSettings::Key_View_ZoomToFitDuringAcq = "View_ZoomToFitDuringAcq";
const QString GlobalSettings::Key_View_ZoomToFitAfterAcq = "View_ZoomToFitAfterAcq";
const QString GlobalSettings::Key_View_TriggerIsZeroTime = "View_TriggerIsZeroTime";
const QString GlobalSettings::Key_View_ColoredBG = "View_ColoredBG";
const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling";
const QString GlobalSettings::Key_View_ShowSamplingPoints = "View_ShowSamplingPoints";
const QString GlobalSettings::Key_View_FillSignalHighAreas = "View_FillSignalHighAreas";
const QString GlobalSettings::Key_View_FillSignalHighAreaColor = "View_FillSignalHighAreaColor";
const QString GlobalSettings::Key_View_ShowAnalogMinorGrid = "View_ShowAnalogMinorGrid";
const QString GlobalSettings::Key_View_ConversionThresholdDispMode = "View_ConversionThresholdDispMode";
const QString GlobalSettings::Key_View_DefaultDivHeight = "View_DefaultDivHeight";
const QString GlobalSettings::Key_View_DefaultLogicHeight = "View_DefaultLogicHeight";
const QString GlobalSettings::Key_View_ShowHoverMarker = "View_ShowHoverMarker";
const QString GlobalSettings::Key_View_SnapDistance = "View_SnapDistance";
const QString GlobalSettings::Key_View_CursorFillColor = "View_CursorFillColor";
const QString GlobalSettings::Key_Dec_InitialStateConfigurable = "Dec_InitialStateConfigurable";
const QString GlobalSettings::Key_Dec_ExportFormat = "Dec_ExportFormat";
const QString GlobalSettings::Key_Dec_AlwaysShowAllRows = "Dec_AlwaysShowAllRows";
const QString GlobalSettings::Key_Log_BufferSize = "Log_BufferSize";
const QString GlobalSettings::Key_Log_NotifyOfStacktrace = "Log_NotifyOfStacktrace";

vector<GlobalSettingsInterface*> GlobalSettings::callbacks_;
bool GlobalSettings::tracking_ = false;
bool GlobalSettings::is_dark_theme_ = false;
map<QString, QVariant> GlobalSettings::tracked_changes_;
QString GlobalSettings::default_style_;
QPalette GlobalSettings::default_palette_;

GlobalSettings::GlobalSettings() :
	QSettings()
{
	beginGroup("Settings");
}

void GlobalSettings::save_internal_defaults()
{
	default_style_ = qApp->style()->objectName();
	if (default_style_.isEmpty())
		default_style_ = "fusion";

	default_palette_ = QApplication::palette();
}

void GlobalSettings::set_defaults_where_needed()
{
	// Use no theme by default
	if (!contains(Key_General_Theme))
		setValue(Key_General_Theme, 0);
	if (!contains(Key_General_Style))
		setValue(Key_General_Style, "");

	// Save setup with .sr files by default
	if (!contains(Key_General_SaveWithSetup))
		setValue(Key_General_SaveWithSetup, true);

	// Enable zoom-to-fit after acquisition by default
	if (!contains(Key_View_ZoomToFitAfterAcq))
		setValue(Key_View_ZoomToFitAfterAcq, true);

	// Enable colored trace backgrounds by default
	if (!contains(Key_View_ColoredBG))
		setValue(Key_View_ColoredBG, true);

	// Enable showing sampling points by default
	if (!contains(Key_View_ShowSamplingPoints))
		setValue(Key_View_ShowSamplingPoints, true);

	// Enable filling logic signal high areas by default
	if (!contains(Key_View_FillSignalHighAreas))
		setValue(Key_View_FillSignalHighAreas, true);

	if (!contains(Key_View_DefaultDivHeight))
		setValue(Key_View_DefaultDivHeight,
		3 * QFontMetrics(QApplication::font()).height());

	if (!contains(Key_View_DefaultLogicHeight))
		setValue(Key_View_DefaultLogicHeight,
		2 * QFontMetrics(QApplication::font()).height());

	if (!contains(Key_View_ShowHoverMarker))
		setValue(Key_View_ShowHoverMarker, true);

	if (!contains(Key_View_SnapDistance))
		setValue(Key_View_SnapDistance, 15);

	if (!contains(Key_Dec_ExportFormat))
		setValue(Key_Dec_ExportFormat, "%s %d: %c: %1");

	// Default to 500 lines of backlog
	if (!contains(Key_Log_BufferSize))
		setValue(Key_Log_BufferSize, 500);

	// Notify user of existing stack trace by default
	if (!contains(Key_Log_NotifyOfStacktrace))
		setValue(Key_Log_NotifyOfStacktrace, true);

	// Default theme is bright, so use its color scheme if undefined
	if (!contains(Key_View_CursorFillColor))
		set_bright_theme_default_colors();
}

void GlobalSettings::set_bright_theme_default_colors()
{
	setValue(Key_View_FillSignalHighAreaColor,
		QColor(0, 0, 0, 5 * 256 / 100).rgba());

	setValue(Key_View_CursorFillColor,
		QColor(220, 231, 243).rgba());
}

void GlobalSettings::set_dark_theme_default_colors()
{
	setValue(Key_View_FillSignalHighAreaColor,
		QColor(188, 188, 188, 9 * 256 / 100).rgba());

	setValue(Key_View_CursorFillColor,
		QColor(60, 60, 60).rgba());
}

bool GlobalSettings::current_theme_is_dark()
{
	return is_dark_theme_;
}

void GlobalSettings::apply_theme()
{
	QString theme_name    = Themes.at(value(Key_General_Theme).toInt()).first;
	QString resource_name = Themes.at(value(Key_General_Theme).toInt()).second;

	if (!resource_name.isEmpty()) {
		QFile file(resource_name);
		file.open(QFile::ReadOnly | QFile::Text);
		qApp->setStyleSheet(file.readAll());
	} else
		qApp->setStyleSheet("");

	qApp->setPalette(default_palette_);

	const QString style = value(Key_General_Style).toString();
	if (style.isEmpty())
		qApp->setStyle(default_style_);
	else
		qApp->setStyle(style);

	is_dark_theme_ = false;

	if (theme_name.compare("QDarkStyleSheet") == 0) {
		QPalette dark_palette;
		dark_palette.setColor(QPalette::Window, QColor(53, 53, 53));
		dark_palette.setColor(QPalette::WindowText, Qt::white);
		dark_palette.setColor(QPalette::Base, QColor(42, 42, 42));
		dark_palette.setColor(QPalette::Dark, QColor(35, 35, 35));
		dark_palette.setColor(QPalette::Highlight, QColor(42, 130, 218));
		qApp->setPalette(dark_palette);
		is_dark_theme_ = true;
	} else if (theme_name.compare("DarkStyle") == 0) {
		QPalette dark_palette;
		dark_palette.setColor(QPalette::Window, QColor(53, 53, 53));
		dark_palette.setColor(QPalette::WindowText, Qt::white);
		dark_palette.setColor(QPalette::Disabled, QPalette::WindowText, QColor(127, 127, 127));
		dark_palette.setColor(QPalette::Base, QColor(42, 42, 42));
		dark_palette.setColor(QPalette::AlternateBase, QColor(66, 66, 66));
		dark_palette.setColor(QPalette::ToolTipBase, Qt::white);
		dark_palette.setColor(QPalette::ToolTipText, QColor(53, 53, 53));
		dark_palette.setColor(QPalette::Text, Qt::white);
		dark_palette.setColor(QPalette::Disabled, QPalette::Text, QColor(127, 127, 127));
		dark_palette.setColor(QPalette::Dark, QColor(35, 35, 35));
		dark_palette.setColor(QPalette::Shadow, QColor(20, 20, 20));
		dark_palette.setColor(QPalette::Button, QColor(53, 53, 53));
		dark_palette.setColor(QPalette::ButtonText, Qt::white);
		dark_palette.setColor(QPalette::Disabled, QPalette::ButtonText, QColor(127, 127, 127));
		dark_palette.setColor(QPalette::BrightText, Qt::red);
		dark_palette.setColor(QPalette::Link, QColor(42, 130, 218));
		dark_palette.setColor(QPalette::Highlight, QColor(42, 130, 218));
		dark_palette.setColor(QPalette::Disabled, QPalette::Highlight, QColor(80, 80, 80));
		dark_palette.setColor(QPalette::HighlightedText, Qt::white);
		dark_palette.setColor(QPalette::Disabled, QPalette::HighlightedText, QColor(127, 127, 127));
		qApp->setPalette(dark_palette);
		is_dark_theme_ = true;
	}

	QPixmapCache::clear();
}

void GlobalSettings::add_change_handler(GlobalSettingsInterface *cb)
{
	callbacks_.push_back(cb);
}

void GlobalSettings::remove_change_handler(GlobalSettingsInterface *cb)
{
	for (auto cb_it = callbacks_.begin(); cb_it != callbacks_.end(); cb_it++)
		if (*cb_it == cb) {
			callbacks_.erase(cb_it);
			break;
		}
}

void GlobalSettings::setValue(const QString &key, const QVariant &value)
{
	// Save previous value if we're tracking changes,
	// not altering an already-existing saved setting
	if (tracking_)
		tracked_changes_.emplace(key, QSettings::value(key));

	QSettings::setValue(key, value);

	// TODO Emulate noquote()
	qDebug() << "Setting" << key << "changed to" << value;

	// Call all registered callbacks
	for (GlobalSettingsInterface *cb : callbacks_)
		cb->on_setting_changed(key, value);
}

void GlobalSettings::start_tracking()
{
	tracking_ = true;
	tracked_changes_.clear();
}

void GlobalSettings::stop_tracking()
{
	tracking_ = false;
	tracked_changes_.clear();
}

void GlobalSettings::undo_tracked_changes()
{
	tracking_ = false;

	for (auto& entry : tracked_changes_)
		setValue(entry.first, entry.second);

	tracked_changes_.clear();
}

void GlobalSettings::store_gvariant(QSettings &settings, GVariant *v)
{
	const GVariantType *var_type = g_variant_get_type(v);
	char *var_type_str = g_variant_type_dup_string(var_type);

	QByteArray var_data = QByteArray((const char*)g_variant_get_data(v),
		g_variant_get_size(v));

	settings.setValue("value", var_data);
	settings.setValue("type", var_type_str);

	g_free(var_type_str);
}

GVariant* GlobalSettings::restore_gvariant(QSettings &settings)
{
	QString raw_type = settings.value("type").toString();
	GVariantType *var_type = g_variant_type_new(raw_type.toUtf8());

	QByteArray data = settings.value("value").toByteArray();

	gpointer var_data = g_memdup((gconstpointer)data.constData(),
		(guint)data.size());

	GVariant *value = g_variant_new_from_data(var_type, var_data,
		data.size(), false, g_free, var_data);

	g_variant_type_free(var_type);

	return value;
}

void GlobalSettings::store_variantbase(QSettings &settings, Glib::VariantBase v)
{
	const QByteArray var_data = QByteArray((const char*)v.get_data(), v.get_size());

	settings.setValue("value", var_data);
	settings.setValue("type", QString::fromStdString(v.get_type_string()));
}

Glib::VariantBase GlobalSettings::restore_variantbase(QSettings &settings)
{
	QString raw_type = settings.value("type").toString();
	GVariantType *var_type = g_variant_type_new(raw_type.toUtf8());

	QByteArray data = settings.value("value").toByteArray();

	gpointer var_data = g_memdup((gconstpointer)data.constData(),
		(guint)data.size());

	GVariant *value = g_variant_new_from_data(var_type, var_data,
		data.size(), false, g_free, var_data);

	Glib::VariantBase ret_val = Glib::VariantBase(value, true);

	g_variant_type_free(var_type);
	g_variant_unref(value);

	return ret_val;
}

} // namespace pv
Commit	Line	Data
	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 <QColor>
	24	#include <QDebug>
	25	#include <QFile>
	26	#include <QFontMetrics>
	27	#include <QPixmapCache>
	28	#include <QString>
	29	#include <QStyle>
	30	#include <QtGlobal>
	31
	32	using std::map;
	33	using std::pair;
	34	using std::string;
	35	using std::vector;
	36
	37	namespace pv {
	38
	39	const vector< pair<QString, QString> > Themes {
	40	{"None" , ""},
	41	{"QDarkStyleSheet", ":/themes/qdarkstyle/style.qss"},
	42	{"DarkStyle", ":/themes/darkstyle/darkstyle.qss"}
	43	};
	44
	45	const QString GlobalSettings::Key_General_Theme = "General_Theme";
	46	const QString GlobalSettings::Key_General_Style = "General_Style";
	47	const QString GlobalSettings::Key_General_SaveWithSetup = "General_SaveWithSetup";
	48	const QString GlobalSettings::Key_View_ZoomToFitDuringAcq = "View_ZoomToFitDuringAcq";
	49	const QString GlobalSettings::Key_View_ZoomToFitAfterAcq = "View_ZoomToFitAfterAcq";
	50	const QString GlobalSettings::Key_View_TriggerIsZeroTime = "View_TriggerIsZeroTime";
	51	const QString GlobalSettings::Key_View_ColoredBG = "View_ColoredBG";
	52	const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling";
	53	const QString GlobalSettings::Key_View_ShowSamplingPoints = "View_ShowSamplingPoints";
	54	const QString GlobalSettings::Key_View_FillSignalHighAreas = "View_FillSignalHighAreas";
	55	const QString GlobalSettings::Key_View_FillSignalHighAreaColor = "View_FillSignalHighAreaColor";
	56	const QString GlobalSettings::Key_View_ShowAnalogMinorGrid = "View_ShowAnalogMinorGrid";
	57	const QString GlobalSettings::Key_View_ConversionThresholdDispMode = "View_ConversionThresholdDispMode";
	58	const QString GlobalSettings::Key_View_DefaultDivHeight = "View_DefaultDivHeight";
	59	const QString GlobalSettings::Key_View_DefaultLogicHeight = "View_DefaultLogicHeight";
	60	const QString GlobalSettings::Key_View_ShowHoverMarker = "View_ShowHoverMarker";
	61	const QString GlobalSettings::Key_View_SnapDistance = "View_SnapDistance";
	62	const QString GlobalSettings::Key_View_CursorFillColor = "View_CursorFillColor";
	63	const QString GlobalSettings::Key_Dec_InitialStateConfigurable = "Dec_InitialStateConfigurable";
	64	const QString GlobalSettings::Key_Dec_ExportFormat = "Dec_ExportFormat";
	65	const QString GlobalSettings::Key_Dec_AlwaysShowAllRows = "Dec_AlwaysShowAllRows";
	66	const QString GlobalSettings::Key_Log_BufferSize = "Log_BufferSize";
	67	const QString GlobalSettings::Key_Log_NotifyOfStacktrace = "Log_NotifyOfStacktrace";
	68
	69	vector<GlobalSettingsInterface*> GlobalSettings::callbacks_;
	70	bool GlobalSettings::tracking_ = false;
	71	bool GlobalSettings::is_dark_theme_ = false;
	72	map<QString, QVariant> GlobalSettings::tracked_changes_;
	73	QString GlobalSettings::default_style_;
	74	QPalette GlobalSettings::default_palette_;
	75
	76	GlobalSettings::GlobalSettings() :
	77	QSettings()
	78	{
	79	beginGroup("Settings");
	80	}
	81
	82	void GlobalSettings::save_internal_defaults()
	83	{
	84	default_style_ = qApp->style()->objectName();
	85	if (default_style_.isEmpty())
	86	default_style_ = "fusion";
	87
	88	default_palette_ = QApplication::palette();
	89	}
	90
	91	void GlobalSettings::set_defaults_where_needed()
	92	{
	93	// Use no theme by default
	94	if (!contains(Key_General_Theme))
	95	setValue(Key_General_Theme, 0);
	96	if (!contains(Key_General_Style))
	97	setValue(Key_General_Style, "");
	98
	99	// Save setup with .sr files by default
	100	if (!contains(Key_General_SaveWithSetup))
	101	setValue(Key_General_SaveWithSetup, true);
	102
	103	// Enable zoom-to-fit after acquisition by default
	104	if (!contains(Key_View_ZoomToFitAfterAcq))
	105	setValue(Key_View_ZoomToFitAfterAcq, true);
	106
	107	// Enable colored trace backgrounds by default
	108	if (!contains(Key_View_ColoredBG))
	109	setValue(Key_View_ColoredBG, true);
	110
	111	// Enable showing sampling points by default
	112	if (!contains(Key_View_ShowSamplingPoints))
	113	setValue(Key_View_ShowSamplingPoints, true);
	114
	115	// Enable filling logic signal high areas by default
	116	if (!contains(Key_View_FillSignalHighAreas))
	117	setValue(Key_View_FillSignalHighAreas, true);
	118
	119	if (!contains(Key_View_DefaultDivHeight))
	120	setValue(Key_View_DefaultDivHeight,
	121	3 * QFontMetrics(QApplication::font()).height());
	122
	123	if (!contains(Key_View_DefaultLogicHeight))
	124	setValue(Key_View_DefaultLogicHeight,
	125	2 * QFontMetrics(QApplication::font()).height());
	126
	127	if (!contains(Key_View_ShowHoverMarker))
	128	setValue(Key_View_ShowHoverMarker, true);
	129
	130	if (!contains(Key_View_SnapDistance))
	131	setValue(Key_View_SnapDistance, 15);
	132
	133	if (!contains(Key_Dec_ExportFormat))
	134	setValue(Key_Dec_ExportFormat, "%s %d: %c: %1");
	135
	136	// Default to 500 lines of backlog
	137	if (!contains(Key_Log_BufferSize))
	138	setValue(Key_Log_BufferSize, 500);
	139
	140	// Notify user of existing stack trace by default
	141	if (!contains(Key_Log_NotifyOfStacktrace))
	142	setValue(Key_Log_NotifyOfStacktrace, true);
	143
	144	// Default theme is bright, so use its color scheme if undefined
	145	if (!contains(Key_View_CursorFillColor))
	146	set_bright_theme_default_colors();
	147	}
	148
	149	void GlobalSettings::set_bright_theme_default_colors()
	150	{
	151	setValue(Key_View_FillSignalHighAreaColor,
	152	QColor(0, 0, 0, 5 * 256 / 100).rgba());
	153
	154	setValue(Key_View_CursorFillColor,
	155	QColor(220, 231, 243).rgba());
	156	}
	157
	158	void GlobalSettings::set_dark_theme_default_colors()
	159	{
	160	setValue(Key_View_FillSignalHighAreaColor,
	161	QColor(188, 188, 188, 9 * 256 / 100).rgba());
	162
	163	setValue(Key_View_CursorFillColor,
	164	QColor(60, 60, 60).rgba());
	165	}
	166
	167	bool GlobalSettings::current_theme_is_dark()
	168	{
	169	return is_dark_theme_;
	170	}
	171
	172	void GlobalSettings::apply_theme()
	173	{
	174	QString theme_name = Themes.at(value(Key_General_Theme).toInt()).first;
	175	QString resource_name = Themes.at(value(Key_General_Theme).toInt()).second;
	176
	177	if (!resource_name.isEmpty()) {
	178	QFile file(resource_name);
	179	file.open(QFile::ReadOnly \| QFile::Text);
	180	qApp->setStyleSheet(file.readAll());
	181	} else
	182	qApp->setStyleSheet("");
	183
	184	qApp->setPalette(default_palette_);
	185
	186	const QString style = value(Key_General_Style).toString();
	187	if (style.isEmpty())
	188	qApp->setStyle(default_style_);
	189	else
	190	qApp->setStyle(style);
	191
	192	is_dark_theme_ = false;
	193
	194	if (theme_name.compare("QDarkStyleSheet") == 0) {
	195	QPalette dark_palette;
	196	dark_palette.setColor(QPalette::Window, QColor(53, 53, 53));
	197	dark_palette.setColor(QPalette::WindowText, Qt::white);
	198	dark_palette.setColor(QPalette::Base, QColor(42, 42, 42));
	199	dark_palette.setColor(QPalette::Dark, QColor(35, 35, 35));
	200	dark_palette.setColor(QPalette::Highlight, QColor(42, 130, 218));
	201	qApp->setPalette(dark_palette);
	202	is_dark_theme_ = true;
	203	} else if (theme_name.compare("DarkStyle") == 0) {
	204	QPalette dark_palette;
	205	dark_palette.setColor(QPalette::Window, QColor(53, 53, 53));
	206	dark_palette.setColor(QPalette::WindowText, Qt::white);
	207	dark_palette.setColor(QPalette::Disabled, QPalette::WindowText, QColor(127, 127, 127));
	208	dark_palette.setColor(QPalette::Base, QColor(42, 42, 42));
	209	dark_palette.setColor(QPalette::AlternateBase, QColor(66, 66, 66));
	210	dark_palette.setColor(QPalette::ToolTipBase, Qt::white);
	211	dark_palette.setColor(QPalette::ToolTipText, QColor(53, 53, 53));
	212	dark_palette.setColor(QPalette::Text, Qt::white);
	213	dark_palette.setColor(QPalette::Disabled, QPalette::Text, QColor(127, 127, 127));
	214	dark_palette.setColor(QPalette::Dark, QColor(35, 35, 35));
	215	dark_palette.setColor(QPalette::Shadow, QColor(20, 20, 20));
	216	dark_palette.setColor(QPalette::Button, QColor(53, 53, 53));
	217	dark_palette.setColor(QPalette::ButtonText, Qt::white);
	218	dark_palette.setColor(QPalette::Disabled, QPalette::ButtonText, QColor(127, 127, 127));
	219	dark_palette.setColor(QPalette::BrightText, Qt::red);
	220	dark_palette.setColor(QPalette::Link, QColor(42, 130, 218));
	221	dark_palette.setColor(QPalette::Highlight, QColor(42, 130, 218));
	222	dark_palette.setColor(QPalette::Disabled, QPalette::Highlight, QColor(80, 80, 80));
	223	dark_palette.setColor(QPalette::HighlightedText, Qt::white);
	224	dark_palette.setColor(QPalette::Disabled, QPalette::HighlightedText, QColor(127, 127, 127));
	225	qApp->setPalette(dark_palette);
	226	is_dark_theme_ = true;
	227	}
	228
	229	QPixmapCache::clear();
	230	}
	231
	232	void GlobalSettings::add_change_handler(GlobalSettingsInterface *cb)
	233	{
	234	callbacks_.push_back(cb);
	235	}
	236
	237	void GlobalSettings::remove_change_handler(GlobalSettingsInterface *cb)
	238	{
	239	for (auto cb_it = callbacks_.begin(); cb_it != callbacks_.end(); cb_it++)
	240	if (*cb_it == cb) {
	241	callbacks_.erase(cb_it);
	242	break;
	243	}
	244	}
	245
	246	void GlobalSettings::setValue(const QString &key, const QVariant &value)
	247	{
	248	// Save previous value if we're tracking changes,
	249	// not altering an already-existing saved setting
	250	if (tracking_)
	251	tracked_changes_.emplace(key, QSettings::value(key));
	252
	253	QSettings::setValue(key, value);
	254
	255	// TODO Emulate noquote()
	256	qDebug() << "Setting" << key << "changed to" << value;
	257
	258	// Call all registered callbacks
	259	for (GlobalSettingsInterface *cb : callbacks_)
	260	cb->on_setting_changed(key, value);
	261	}
	262
	263	void GlobalSettings::start_tracking()
	264	{
	265	tracking_ = true;
	266	tracked_changes_.clear();
	267	}
	268
	269	void GlobalSettings::stop_tracking()
	270	{
	271	tracking_ = false;
	272	tracked_changes_.clear();
	273	}
	274
	275	void GlobalSettings::undo_tracked_changes()
	276	{
	277	tracking_ = false;
	278
	279	for (auto& entry : tracked_changes_)
	280	setValue(entry.first, entry.second);
	281
	282	tracked_changes_.clear();
	283	}
	284
	285	void GlobalSettings::store_gvariant(QSettings &settings, GVariant *v)
	286	{
	287	const GVariantType *var_type = g_variant_get_type(v);
	288	char *var_type_str = g_variant_type_dup_string(var_type);
	289
	290	QByteArray var_data = QByteArray((const char*)g_variant_get_data(v),
	291	g_variant_get_size(v));
	292
	293	settings.setValue("value", var_data);
	294	settings.setValue("type", var_type_str);
	295
	296	g_free(var_type_str);
	297	}
	298
	299	GVariant* GlobalSettings::restore_gvariant(QSettings &settings)
	300	{
	301	QString raw_type = settings.value("type").toString();
	302	GVariantType *var_type = g_variant_type_new(raw_type.toUtf8());
	303
	304	QByteArray data = settings.value("value").toByteArray();
	305
	306	gpointer var_data = g_memdup((gconstpointer)data.constData(),
	307	(guint)data.size());
	308
	309	GVariant *value = g_variant_new_from_data(var_type, var_data,
	310	data.size(), false, g_free, var_data);
	311
	312	g_variant_type_free(var_type);
	313
	314	return value;
	315	}
	316
	317	void GlobalSettings::store_variantbase(QSettings &settings, Glib::VariantBase v)
	318	{
	319	const QByteArray var_data = QByteArray((const char*)v.get_data(), v.get_size());
	320
	321	settings.setValue("value", var_data);
	322	settings.setValue("type", QString::fromStdString(v.get_type_string()));
	323	}
	324
	325	Glib::VariantBase GlobalSettings::restore_variantbase(QSettings &settings)
	326	{
	327	QString raw_type = settings.value("type").toString();
	328	GVariantType *var_type = g_variant_type_new(raw_type.toUtf8());
	329
	330	QByteArray data = settings.value("value").toByteArray();
	331
	332	gpointer var_data = g_memdup((gconstpointer)data.constData(),
	333	(guint)data.size());
	334
	335	GVariant *value = g_variant_new_from_data(var_type, var_data,
	336	data.size(), false, g_free, var_data);
	337
	338	Glib::VariantBase ret_val = Glib::VariantBase(value, true);
	339
	340	g_variant_type_free(var_type);
	341	g_variant_unref(value);
	342
	343	return ret_val;
	344	}
	345
	346	} // namespace pv