[pulseview.git] / pv / toolbars / mainbar.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012-2015 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <extdef.h>

#include <algorithm>
#include <cassert>

#include <QAction>
#include <QDebug>
#include <QHelpEvent>
#include <QMenu>
#include <QToolTip>

#include "mainbar.hpp"

#include <pv/devicemanager.hpp>
#include <pv/mainwindow.hpp>
#include <pv/popups/deviceoptions.hpp>
#include <pv/popups/channels.hpp>
#include <pv/util.hpp>

#include <libsigrokcxx/libsigrokcxx.hpp>

using std::back_inserter;
using std::copy;
using std::list;
using std::map;
using std::max;
using std::min;
using std::shared_ptr;
using std::string;
using std::vector;

using sigrok::Capability;
using sigrok::ConfigKey;
using sigrok::Device;
using sigrok::Error;

namespace pv {
namespace toolbars {

const uint64_t MainBar::MinSampleCount = 100ULL;
const uint64_t MainBar::MaxSampleCount = 1000000000000ULL;
const uint64_t MainBar::DefaultSampleCount = 1000000;

MainBar::MainBar(Session &session, MainWindow &main_window) :
	QToolBar("Sampling Bar", &main_window),
	session_(session),
	main_window_(main_window),
	device_selector_(this, session.device_manager(),
		main_window.action_connect()),
	configure_button_(this),
	configure_button_action_(NULL),
	channels_button_(this),
	sample_count_(" samples", this),
	sample_rate_("Hz", this),
	updating_sample_rate_(false),
	updating_sample_count_(false),
	sample_count_supported_(false),
	icon_red_(":/icons/status-red.svg"),
	icon_green_(":/icons/status-green.svg"),
	icon_grey_(":/icons/status-grey.svg"),
	run_stop_button_(this),
	menu_button_(this)
{
	setObjectName(QString::fromUtf8("MainBar"));

	setMovable(false);
	setFloatable(false);
	setContextMenuPolicy(Qt::PreventContextMenu);

	// Device selector menu
	connect(&device_selector_, SIGNAL(device_selected()),
		this, SLOT(on_device_selected()));

	// Setup the decoder button
#ifdef ENABLE_DECODE
	QToolButton *add_decoder_button = new QToolButton(this);
	add_decoder_button->setIcon(QIcon::fromTheme("add-decoder",
		QIcon(":/icons/add-decoder.svg")));
	add_decoder_button->setPopupMode(QToolButton::InstantPopup);
	add_decoder_button->setMenu(main_window_.menu_decoder_add());
#endif

	// Setup the menu
	QMenu *const menu = new QMenu(this);

	QMenu *const menu_help = new QMenu;
	menu_help->setTitle(tr("&Help"));
	menu_help->addAction(main_window.action_about());

	menu->addAction(menu_help->menuAction());
	menu->addSeparator();
	menu->addAction(main_window.action_quit());

	menu_button_.setMenu(menu);
	menu_button_.setPopupMode(QToolButton::InstantPopup);
	menu_button_.setIcon(QIcon::fromTheme("menu",
		QIcon(":/icons/menu.svg")));

	// Setup the toolbar
	addAction(main_window.action_open());
	addAction(main_window.action_save_as());
	addSeparator();
	addAction(main_window.action_view_zoom_in());
	addAction(main_window.action_view_zoom_out());
	addAction(main_window.action_view_zoom_fit());
	addAction(main_window.action_view_zoom_one_to_one());
	addSeparator();
	addAction(main_window.action_view_show_cursors());
	addSeparator();

	connect(&run_stop_button_, SIGNAL(clicked()),
		this, SLOT(on_run_stop()));
	connect(&sample_count_, SIGNAL(value_changed()),
		this, SLOT(on_sample_count_changed()));
	connect(&sample_rate_, SIGNAL(value_changed()),
		this, SLOT(on_sample_rate_changed()));

	sample_count_.show_min_max_step(0, UINT64_MAX, 1);

	set_capture_state(pv::Session::Stopped);

	configure_button_.setIcon(QIcon::fromTheme("configure",
		QIcon(":/icons/configure.png")));

	channels_button_.setIcon(QIcon::fromTheme("channels",
		QIcon(":/icons/channels.svg")));

	run_stop_button_.setToolButtonStyle(Qt::ToolButtonTextBesideIcon);

	addWidget(&device_selector_);
	configure_button_action_ = addWidget(&configure_button_);
	addWidget(&channels_button_);
	addWidget(&sample_count_);
	addWidget(&sample_rate_);
	addWidget(&run_stop_button_);
#ifdef ENABLE_DECODE
	addSeparator();
	addWidget(add_decoder_button);
#endif

	QWidget *const spacer = new QWidget();
	spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
	addWidget(spacer);

	addWidget(&menu_button_);

	sample_count_.installEventFilter(this);
	sample_rate_.installEventFilter(this);
}

void MainBar::update_device_list()
{
	DeviceManager &mgr = session_.device_manager();
	shared_ptr<Device> selected_device = session_.device();
	list< shared_ptr<Device> > devs;

	copy(mgr.devices().begin(), mgr.devices().end(), back_inserter(devs));

	if (std::find(devs.begin(), devs.end(), selected_device) == devs.end())
		devs.push_back(selected_device);
	assert(selected_device);

	device_selector_.set_device_list(devs, selected_device);
	update_device_config_widgets();
}


void MainBar::set_capture_state(pv::Session::capture_state state)
{
	const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
	run_stop_button_.setIcon(*icons[state]);
	run_stop_button_.setText((state == pv::Session::Stopped) ?
		tr("Run") : tr("Stop"));
	run_stop_button_.setShortcut(QKeySequence(Qt::Key_Space));
}

void MainBar::update_sample_rate_selector()
{
	Glib::VariantContainerBase gvar_dict;
	GVariant *gvar_list;
	const uint64_t *elements = NULL;
	gsize num_elements;

	if (updating_sample_rate_)
		return;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	assert(!updating_sample_rate_);
	updating_sample_rate_ = true;

	const auto keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
	const auto iter = keys.find(ConfigKey::SAMPLERATE);
	if (iter != keys.end() &&
		(*iter).second.find(sigrok::LIST) != (*iter).second.end()) {
		try {
			gvar_dict = device->config_list(ConfigKey::SAMPLERATE);
		} catch(const sigrok::Error &e) {
			// Failed to enunmerate samplerate
			(void)e;
		}
	}

	if (!gvar_dict) {
		sample_rate_.show_none();
		updating_sample_rate_ = false;
		return;
	}

	if ((gvar_list = g_variant_lookup_value(gvar_dict.gobj(),
			"samplerate-steps", G_VARIANT_TYPE("at"))))
	{
		elements = (const uint64_t *)g_variant_get_fixed_array(
				gvar_list, &num_elements, sizeof(uint64_t));

		const uint64_t min = elements[0];
		const uint64_t max = elements[1];
		const uint64_t step = elements[2];

		g_variant_unref(gvar_list);

		assert(min > 0);
		assert(max > 0);
		assert(max > min);
		assert(step > 0);

		if (step == 1)
			sample_rate_.show_125_list(min, max);
		else
		{
			// When the step is not 1, we cam't make a 1-2-5-10
			// list of sample rates, because we may not be able to
			// make round numbers. Therefore in this case, show a
			// spin box.
			sample_rate_.show_min_max_step(min, max, step);
		}
	}
	else if ((gvar_list = g_variant_lookup_value(gvar_dict.gobj(),
			"samplerates", G_VARIANT_TYPE("at"))))
	{
		elements = (const uint64_t *)g_variant_get_fixed_array(
				gvar_list, &num_elements, sizeof(uint64_t));
		sample_rate_.show_list(elements, num_elements);
		g_variant_unref(gvar_list);
	}
	updating_sample_rate_ = false;

	update_sample_rate_selector_value();
}

void MainBar::update_sample_rate_selector_value()
{
	if (updating_sample_rate_)
		return;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	try {
		auto gvar = device->config_get(ConfigKey::SAMPLERATE);
		uint64_t samplerate =
			Glib::VariantBase::cast_dynamic<Glib::Variant<guint64>>(gvar).get();
		assert(!updating_sample_rate_);
		updating_sample_rate_ = true;
		sample_rate_.set_value(samplerate);
		updating_sample_rate_ = false;
	} catch (Error error) {
		qDebug() << "WARNING: Failed to get value of sample rate";
		return;
	}
}

void MainBar::update_sample_count_selector()
{
	if (updating_sample_count_)
		return;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	assert(!updating_sample_count_);
	updating_sample_count_ = true;

	if (!sample_count_supported_)
	{
		sample_count_.show_none();
		updating_sample_count_ = false;
		return;
	}

	uint64_t sample_count = sample_count_.value();
	uint64_t min_sample_count = 0;
	uint64_t max_sample_count = MaxSampleCount;

	if (sample_count == 0)
		sample_count = DefaultSampleCount;

	const auto keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
	const auto iter = keys.find(ConfigKey::LIMIT_SAMPLES);
	if (iter != keys.end() &&
		(*iter).second.find(sigrok::LIST) != (*iter).second.end()) {
		try {
			auto gvar =
				device->config_list(ConfigKey::LIMIT_SAMPLES);
			if (gvar)
				g_variant_get(gvar.gobj(), "(tt)",
					&min_sample_count, &max_sample_count);
		} catch(const sigrok::Error &e) {
			// Failed to query sample limit
			(void)e;
		}
	}

	min_sample_count = min(max(min_sample_count, MinSampleCount),
		max_sample_count);

	sample_count_.show_125_list(
		min_sample_count, max_sample_count);

	try {
		auto gvar = device->config_get(ConfigKey::LIMIT_SAMPLES);
		sample_count = g_variant_get_uint64(gvar.gobj());
		if (sample_count == 0)
			sample_count = DefaultSampleCount;
		sample_count = min(max(sample_count, MinSampleCount),
			max_sample_count);
	} catch (Error error) {}

	sample_count_.set_value(sample_count);

	updating_sample_count_ = false;
}

void MainBar::update_device_config_widgets()
{
	using namespace pv::popups;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	// Update the configure popup
	DeviceOptions *const opts = new DeviceOptions(device, this);
	configure_button_action_->setVisible(
		!opts->binding().properties().empty());
	configure_button_.set_popup(opts);

	// Update the channels popup
	Channels *const channels = new Channels(session_, this);
	channels_button_.set_popup(channels);

	// Update supported options.
	sample_count_supported_ = false;

	try {
		for (auto entry : device->config_keys(ConfigKey::DEVICE_OPTIONS))
		{
			auto key = entry.first;
			auto capabilities = entry.second;
			switch (key->id()) {
			case SR_CONF_LIMIT_SAMPLES:
				if (capabilities.count(Capability::SET))
					sample_count_supported_ = true;
				break;
			case SR_CONF_LIMIT_FRAMES:
				if (capabilities.count(Capability::SET))
				{
					device->config_set(ConfigKey::LIMIT_FRAMES,
						Glib::Variant<guint64>::create(1));
					on_config_changed();
				}
				break;
			default:
				break;
			}
		}
	} catch (Error error) {}

	// Add notification of reconfigure events
	disconnect(this, SLOT(on_config_changed()));
	connect(&opts->binding(), SIGNAL(config_changed()),
		this, SLOT(on_config_changed()));

	// Update sweep timing widgets.
	update_sample_count_selector();
	update_sample_rate_selector();
}

void MainBar::commit_sample_count()
{
	uint64_t sample_count = 0;

	if (updating_sample_count_)
		return;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	sample_count = sample_count_.value();

	// Set the sample count
	assert(!updating_sample_count_);
	updating_sample_count_ = true;
	if (sample_count_supported_)
	{
		try {
			device->config_set(ConfigKey::LIMIT_SAMPLES,
				Glib::Variant<guint64>::create(sample_count));
			on_config_changed();
		} catch (Error error) {
			qDebug() << "Failed to configure sample count.";
			return;
		}
	}
	updating_sample_count_ = false;
}

void MainBar::commit_sample_rate()
{
	uint64_t sample_rate = 0;

	if (updating_sample_rate_)
		return;

	const shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	sample_rate = sample_rate_.value();
	if (sample_rate == 0)
		return;

	// Set the samplerate
	assert(!updating_sample_rate_);
	updating_sample_rate_ = true;
	try {
		device->config_set(ConfigKey::SAMPLERATE,
			Glib::Variant<guint64>::create(sample_rate));
		on_config_changed();
	} catch (Error error) {
		qDebug() << "Failed to configure samplerate.";
		return;
	}
	updating_sample_rate_ = false;
}

void MainBar::on_device_selected()
{
	shared_ptr<Device> device = device_selector_.selected_device();
	if (!device)
		return;

	main_window_.select_device(device);

	update_device_config_widgets();
}

void MainBar::on_sample_count_changed()
{
	commit_sample_count();
}

void MainBar::on_sample_rate_changed()
{
	commit_sample_rate();
}

void MainBar::on_run_stop()
{
	commit_sample_count();
	commit_sample_rate();	
	main_window_.run_stop();
}

void MainBar::on_config_changed()
{
	commit_sample_count();
	update_sample_count_selector();	
	commit_sample_rate();	
	update_sample_rate_selector();
}

bool MainBar::eventFilter(QObject *watched, QEvent *event)
{
	if ((watched == &sample_count_ || watched == &sample_rate_) &&
		(event->type() == QEvent::ToolTip)) {
		double sec = (double)sample_count_.value() / sample_rate_.value();
		QHelpEvent *help_event = static_cast<QHelpEvent*>(event);

		QString str = tr("Total sampling time: %1").arg(pv::util::format_second(sec));
		QToolTip::showText(help_event->globalPos(), str);

		return true;
	}

	return false;
}

} // namespace toolbars
} // namespace pv
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012-2015 Joel Holdsworth <joel@airwebreathe.org.uk>
	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, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include <extdef.h>
	22
	23	#include <algorithm>
	24	#include <cassert>
	25
	26	#include <QAction>
	27	#include <QDebug>
	28	#include <QHelpEvent>
	29	#include <QMenu>
	30	#include <QToolTip>
	31
	32	#include "mainbar.hpp"
	33
	34	#include <pv/devicemanager.hpp>
	35	#include <pv/mainwindow.hpp>
	36	#include <pv/popups/deviceoptions.hpp>
	37	#include <pv/popups/channels.hpp>
	38	#include <pv/util.hpp>
	39
	40	#include <libsigrokcxx/libsigrokcxx.hpp>
	41
	42	using std::back_inserter;
	43	using std::copy;
	44	using std::list;
	45	using std::map;
	46	using std::max;
	47	using std::min;
	48	using std::shared_ptr;
	49	using std::string;
	50	using std::vector;
	51
	52	using sigrok::Capability;
	53	using sigrok::ConfigKey;
	54	using sigrok::Device;
	55	using sigrok::Error;
	56
	57	namespace pv {
	58	namespace toolbars {
	59
	60	const uint64_t MainBar::MinSampleCount = 100ULL;
	61	const uint64_t MainBar::MaxSampleCount = 1000000000000ULL;
	62	const uint64_t MainBar::DefaultSampleCount = 1000000;
	63
	64	MainBar::MainBar(Session &session, MainWindow &main_window) :
	65	QToolBar("Sampling Bar", &main_window),
	66	session_(session),
	67	main_window_(main_window),
	68	device_selector_(this, session.device_manager(),
	69	main_window.action_connect()),
	70	configure_button_(this),
	71	configure_button_action_(NULL),
	72	channels_button_(this),
	73	sample_count_(" samples", this),
	74	sample_rate_("Hz", this),
	75	updating_sample_rate_(false),
	76	updating_sample_count_(false),
	77	sample_count_supported_(false),
	78	icon_red_(":/icons/status-red.svg"),
	79	icon_green_(":/icons/status-green.svg"),
	80	icon_grey_(":/icons/status-grey.svg"),
	81	run_stop_button_(this),
	82	menu_button_(this)
	83	{
	84	setObjectName(QString::fromUtf8("MainBar"));
	85
	86	setMovable(false);
	87	setFloatable(false);
	88	setContextMenuPolicy(Qt::PreventContextMenu);
	89
	90	// Device selector menu
	91	connect(&device_selector_, SIGNAL(device_selected()),
	92	this, SLOT(on_device_selected()));
	93
	94	// Setup the decoder button
	95	#ifdef ENABLE_DECODE
	96	QToolButton *add_decoder_button = new QToolButton(this);
	97	add_decoder_button->setIcon(QIcon::fromTheme("add-decoder",
	98	QIcon(":/icons/add-decoder.svg")));
	99	add_decoder_button->setPopupMode(QToolButton::InstantPopup);
	100	add_decoder_button->setMenu(main_window_.menu_decoder_add());
	101	#endif
	102
	103	// Setup the menu
	104	QMenu *const menu = new QMenu(this);
	105
	106	QMenu *const menu_help = new QMenu;
	107	menu_help->setTitle(tr("&Help"));
	108	menu_help->addAction(main_window.action_about());
	109
	110	menu->addAction(menu_help->menuAction());
	111	menu->addSeparator();
	112	menu->addAction(main_window.action_quit());
	113
	114	menu_button_.setMenu(menu);
	115	menu_button_.setPopupMode(QToolButton::InstantPopup);
	116	menu_button_.setIcon(QIcon::fromTheme("menu",
	117	QIcon(":/icons/menu.svg")));
	118
	119	// Setup the toolbar
	120	addAction(main_window.action_open());
	121	addAction(main_window.action_save_as());
	122	addSeparator();
	123	addAction(main_window.action_view_zoom_in());
	124	addAction(main_window.action_view_zoom_out());
	125	addAction(main_window.action_view_zoom_fit());
	126	addAction(main_window.action_view_zoom_one_to_one());
	127	addSeparator();
	128	addAction(main_window.action_view_show_cursors());
	129	addSeparator();
	130
	131	connect(&run_stop_button_, SIGNAL(clicked()),
	132	this, SLOT(on_run_stop()));
	133	connect(&sample_count_, SIGNAL(value_changed()),
	134	this, SLOT(on_sample_count_changed()));
	135	connect(&sample_rate_, SIGNAL(value_changed()),
	136	this, SLOT(on_sample_rate_changed()));
	137
	138	sample_count_.show_min_max_step(0, UINT64_MAX, 1);
	139
	140	set_capture_state(pv::Session::Stopped);
	141
	142	configure_button_.setIcon(QIcon::fromTheme("configure",
	143	QIcon(":/icons/configure.png")));
	144
	145	channels_button_.setIcon(QIcon::fromTheme("channels",
	146	QIcon(":/icons/channels.svg")));
	147
	148	run_stop_button_.setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
	149
	150	addWidget(&device_selector_);
	151	configure_button_action_ = addWidget(&configure_button_);
	152	addWidget(&channels_button_);
	153	addWidget(&sample_count_);
	154	addWidget(&sample_rate_);
	155	addWidget(&run_stop_button_);
	156	#ifdef ENABLE_DECODE
	157	addSeparator();
	158	addWidget(add_decoder_button);
	159	#endif
	160
	161	QWidget *const spacer = new QWidget();
	162	spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
	163	addWidget(spacer);
	164
	165	addWidget(&menu_button_);
	166
	167	sample_count_.installEventFilter(this);
	168	sample_rate_.installEventFilter(this);
	169	}
	170
	171	void MainBar::update_device_list()
	172	{
	173	DeviceManager &mgr = session_.device_manager();
	174	shared_ptr<Device> selected_device = session_.device();
	175	list< shared_ptr<Device> > devs;
	176
	177	copy(mgr.devices().begin(), mgr.devices().end(), back_inserter(devs));
	178
	179	if (std::find(devs.begin(), devs.end(), selected_device) == devs.end())
	180	devs.push_back(selected_device);
	181	assert(selected_device);
	182
	183	device_selector_.set_device_list(devs, selected_device);
	184	update_device_config_widgets();
	185	}
	186
	187
	188	void MainBar::set_capture_state(pv::Session::capture_state state)
	189	{
	190	const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
	191	run_stop_button_.setIcon(*icons[state]);
	192	run_stop_button_.setText((state == pv::Session::Stopped) ?
	193	tr("Run") : tr("Stop"));
	194	run_stop_button_.setShortcut(QKeySequence(Qt::Key_Space));
	195	}
	196
	197	void MainBar::update_sample_rate_selector()
	198	{
	199	Glib::VariantContainerBase gvar_dict;
	200	GVariant *gvar_list;
	201	const uint64_t *elements = NULL;
	202	gsize num_elements;
	203
	204	if (updating_sample_rate_)
	205	return;
	206
	207	const shared_ptr<Device> device = device_selector_.selected_device();
	208	if (!device)
	209	return;
	210
	211	assert(!updating_sample_rate_);
	212	updating_sample_rate_ = true;
	213
	214	const auto keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
	215	const auto iter = keys.find(ConfigKey::SAMPLERATE);
	216	if (iter != keys.end() &&
	217	(iter).second.find(sigrok::LIST) != (iter).second.end()) {
	218	try {
	219	gvar_dict = device->config_list(ConfigKey::SAMPLERATE);
	220	} catch(const sigrok::Error &e) {
	221	// Failed to enunmerate samplerate
	222	(void)e;
	223	}
	224	}
	225
	226	if (!gvar_dict) {
	227	sample_rate_.show_none();
	228	updating_sample_rate_ = false;
	229	return;
	230	}
	231
	232	if ((gvar_list = g_variant_lookup_value(gvar_dict.gobj(),
	233	"samplerate-steps", G_VARIANT_TYPE("at"))))
	234	{
	235	elements = (const uint64_t *)g_variant_get_fixed_array(
	236	gvar_list, &num_elements, sizeof(uint64_t));
	237
	238	const uint64_t min = elements[0];
	239	const uint64_t max = elements[1];
	240	const uint64_t step = elements[2];
	241
	242	g_variant_unref(gvar_list);
	243
	244	assert(min > 0);
	245	assert(max > 0);
	246	assert(max > min);
	247	assert(step > 0);
	248
	249	if (step == 1)
	250	sample_rate_.show_125_list(min, max);
	251	else
	252	{
	253	// When the step is not 1, we cam't make a 1-2-5-10
	254	// list of sample rates, because we may not be able to
	255	// make round numbers. Therefore in this case, show a
	256	// spin box.
	257	sample_rate_.show_min_max_step(min, max, step);
	258	}
	259	}
	260	else if ((gvar_list = g_variant_lookup_value(gvar_dict.gobj(),
	261	"samplerates", G_VARIANT_TYPE("at"))))
	262	{
	263	elements = (const uint64_t *)g_variant_get_fixed_array(
	264	gvar_list, &num_elements, sizeof(uint64_t));
	265	sample_rate_.show_list(elements, num_elements);
	266	g_variant_unref(gvar_list);
	267	}
	268	updating_sample_rate_ = false;
	269
	270	update_sample_rate_selector_value();
	271	}
	272
	273	void MainBar::update_sample_rate_selector_value()
	274	{
	275	if (updating_sample_rate_)
	276	return;
	277
	278	const shared_ptr<Device> device = device_selector_.selected_device();
	279	if (!device)
	280	return;
	281
	282	try {
	283	auto gvar = device->config_get(ConfigKey::SAMPLERATE);
	284	uint64_t samplerate =
	285	Glib::VariantBase::cast_dynamic<Glib::Variant<guint64>>(gvar).get();
	286	assert(!updating_sample_rate_);
	287	updating_sample_rate_ = true;
	288	sample_rate_.set_value(samplerate);
	289	updating_sample_rate_ = false;
	290	} catch (Error error) {
	291	qDebug() << "WARNING: Failed to get value of sample rate";
	292	return;
	293	}
	294	}
	295
	296	void MainBar::update_sample_count_selector()
	297	{
	298	if (updating_sample_count_)
	299	return;
	300
	301	const shared_ptr<Device> device = device_selector_.selected_device();
	302	if (!device)
	303	return;
	304
	305	assert(!updating_sample_count_);
	306	updating_sample_count_ = true;
	307
	308	if (!sample_count_supported_)
	309	{
	310	sample_count_.show_none();
	311	updating_sample_count_ = false;
	312	return;
	313	}
	314
	315	uint64_t sample_count = sample_count_.value();
	316	uint64_t min_sample_count = 0;
	317	uint64_t max_sample_count = MaxSampleCount;
	318
	319	if (sample_count == 0)
	320	sample_count = DefaultSampleCount;
	321
	322	const auto keys = device->config_keys(ConfigKey::DEVICE_OPTIONS);
	323	const auto iter = keys.find(ConfigKey::LIMIT_SAMPLES);
	324	if (iter != keys.end() &&
	325	(iter).second.find(sigrok::LIST) != (iter).second.end()) {
	326	try {
	327	auto gvar =
	328	device->config_list(ConfigKey::LIMIT_SAMPLES);
	329	if (gvar)
	330	g_variant_get(gvar.gobj(), "(tt)",
	331	&min_sample_count, &max_sample_count);
	332	} catch(const sigrok::Error &e) {
	333	// Failed to query sample limit
	334	(void)e;
	335	}
	336	}
	337
	338	min_sample_count = min(max(min_sample_count, MinSampleCount),
	339	max_sample_count);
	340
	341	sample_count_.show_125_list(
	342	min_sample_count, max_sample_count);
	343
	344	try {
	345	auto gvar = device->config_get(ConfigKey::LIMIT_SAMPLES);
	346	sample_count = g_variant_get_uint64(gvar.gobj());
	347	if (sample_count == 0)
	348	sample_count = DefaultSampleCount;
	349	sample_count = min(max(sample_count, MinSampleCount),
	350	max_sample_count);
	351	} catch (Error error) {}
	352
	353	sample_count_.set_value(sample_count);
	354
	355	updating_sample_count_ = false;
	356	}
	357
	358	void MainBar::update_device_config_widgets()
	359	{
	360	using namespace pv::popups;
	361
	362	const shared_ptr<Device> device = device_selector_.selected_device();
	363	if (!device)
	364	return;
	365
	366	// Update the configure popup
	367	DeviceOptions *const opts = new DeviceOptions(device, this);
	368	configure_button_action_->setVisible(
	369	!opts->binding().properties().empty());
	370	configure_button_.set_popup(opts);
	371
	372	// Update the channels popup
	373	Channels *const channels = new Channels(session_, this);
	374	channels_button_.set_popup(channels);
	375
	376	// Update supported options.
	377	sample_count_supported_ = false;
	378
	379	try {
	380	for (auto entry : device->config_keys(ConfigKey::DEVICE_OPTIONS))
	381	{
	382	auto key = entry.first;
	383	auto capabilities = entry.second;
	384	switch (key->id()) {
	385	case SR_CONF_LIMIT_SAMPLES:
	386	if (capabilities.count(Capability::SET))
	387	sample_count_supported_ = true;
	388	break;
	389	case SR_CONF_LIMIT_FRAMES:
	390	if (capabilities.count(Capability::SET))
	391	{
	392	device->config_set(ConfigKey::LIMIT_FRAMES,
	393	Glib::Variant<guint64>::create(1));
	394	on_config_changed();
	395	}
	396	break;
	397	default:
	398	break;
	399	}
	400	}
	401	} catch (Error error) {}
	402
	403	// Add notification of reconfigure events
	404	disconnect(this, SLOT(on_config_changed()));
	405	connect(&opts->binding(), SIGNAL(config_changed()),
	406	this, SLOT(on_config_changed()));
	407
	408	// Update sweep timing widgets.
	409	update_sample_count_selector();
	410	update_sample_rate_selector();
	411	}
	412
	413	void MainBar::commit_sample_count()
	414	{
	415	uint64_t sample_count = 0;
	416
	417	if (updating_sample_count_)
	418	return;
	419
	420	const shared_ptr<Device> device = device_selector_.selected_device();
	421	if (!device)
	422	return;
	423
	424	sample_count = sample_count_.value();
	425
	426	// Set the sample count
	427	assert(!updating_sample_count_);
	428	updating_sample_count_ = true;
	429	if (sample_count_supported_)
	430	{
	431	try {
	432	device->config_set(ConfigKey::LIMIT_SAMPLES,
	433	Glib::Variant<guint64>::create(sample_count));
	434	on_config_changed();
	435	} catch (Error error) {
	436	qDebug() << "Failed to configure sample count.";
	437	return;
	438	}
	439	}
	440	updating_sample_count_ = false;
	441	}
	442
	443	void MainBar::commit_sample_rate()
	444	{
	445	uint64_t sample_rate = 0;
	446
	447	if (updating_sample_rate_)
	448	return;
	449
	450	const shared_ptr<Device> device = device_selector_.selected_device();
	451	if (!device)
	452	return;
	453
	454	sample_rate = sample_rate_.value();
	455	if (sample_rate == 0)
	456	return;
	457
	458	// Set the samplerate
	459	assert(!updating_sample_rate_);
	460	updating_sample_rate_ = true;
	461	try {
	462	device->config_set(ConfigKey::SAMPLERATE,
	463	Glib::Variant<guint64>::create(sample_rate));
	464	on_config_changed();
	465	} catch (Error error) {
	466	qDebug() << "Failed to configure samplerate.";
	467	return;
	468	}
	469	updating_sample_rate_ = false;
	470	}
	471
	472	void MainBar::on_device_selected()
	473	{
	474	shared_ptr<Device> device = device_selector_.selected_device();
	475	if (!device)
	476	return;
	477
	478	main_window_.select_device(device);
	479
	480	update_device_config_widgets();
	481	}
	482
	483	void MainBar::on_sample_count_changed()
	484	{
	485	commit_sample_count();
	486	}
	487
	488	void MainBar::on_sample_rate_changed()
	489	{
	490	commit_sample_rate();
	491	}
	492
	493	void MainBar::on_run_stop()
	494	{
	495	commit_sample_count();
	496	commit_sample_rate();
	497	main_window_.run_stop();
	498	}
	499
	500	void MainBar::on_config_changed()
	501	{
	502	commit_sample_count();
	503	update_sample_count_selector();
	504	commit_sample_rate();
	505	update_sample_rate_selector();
	506	}
	507
	508	bool MainBar::eventFilter(QObject watched, QEvent event)
	509	{
	510	if ((watched == &sample_count_ \|\| watched == &sample_rate_) &&
	511	(event->type() == QEvent::ToolTip)) {
	512	double sec = (double)sample_count_.value() / sample_rate_.value();
	513	QHelpEvent help_event = static_cast<QHelpEvent>(event);
	514
	515	QString str = tr("Total sampling time: %1").arg(pv::util::format_second(sec));
	516	QToolTip::showText(help_event->globalPos(), str);
	517
	518	return true;
	519	}
	520
	521	return false;
	522	}
	523
	524	} // namespace toolbars
	525	} // namespace pv