[pulseview.git] / pv / views / trace / ruler.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012 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, see <http://www.gnu.org/licenses/>.
 */

#include <extdef.h>

#include <QFontMetrics>
#include <QMenu>
#include <QMouseEvent>

#include <pv/globalsettings.hpp>

#include "ruler.hpp"
#include "view.hpp"

using namespace Qt;

using std::function;
using std::max;
using std::min;
using std::shared_ptr;
using std::vector;

namespace pv {
namespace views {
namespace trace {

const float Ruler::RulerHeight = 2.5f; // x Text Height

const float Ruler::HoverArrowSize = 0.5f; // x Text Height

Ruler::Ruler(View &parent) :
	MarginWidget(parent)
{
	setMouseTracking(true);

	connect(&view_, SIGNAL(hover_point_changed(const QWidget*, QPoint)),
		this, SLOT(on_hover_point_changed(const QWidget*, QPoint)));
	connect(&view_, SIGNAL(offset_changed()),
		this, SLOT(invalidate_tick_position_cache()));
	connect(&view_, SIGNAL(scale_changed()),
		this, SLOT(invalidate_tick_position_cache()));
	connect(&view_, SIGNAL(tick_prefix_changed()),
		this, SLOT(invalidate_tick_position_cache()));
	connect(&view_, SIGNAL(tick_precision_changed()),
		this, SLOT(invalidate_tick_position_cache()));
	connect(&view_, SIGNAL(tick_period_changed()),
		this, SLOT(invalidate_tick_position_cache()));
	connect(&view_, SIGNAL(time_unit_changed()),
		this, SLOT(invalidate_tick_position_cache()));
}

QSize Ruler::sizeHint() const
{
	const int text_height = calculate_text_height();
	return QSize(0, RulerHeight * text_height);
}

QSize Ruler::extended_size_hint() const
{
	QRectF max_rect;
	vector< shared_ptr<TimeItem> > items(view_.time_items());
	for (auto &i : items)
		max_rect = max_rect.united(i->label_rect(QRect()));
	return QSize(0, sizeHint().height() - max_rect.top() / 2 +
		ViewItem::HighlightRadius);
}

QString Ruler::format_time_with_distance(
	const pv::util::Timestamp& distance,
	const pv::util::Timestamp& t,
	pv::util::SIPrefix prefix,
	pv::util::TimeUnit unit,
	unsigned precision,
	bool sign)
{
	const unsigned limit = 60;

	if (t.is_zero())
		return "0";

	// If we have to use samples then we have no alternative formats
	if (unit == pv::util::TimeUnit::Samples)
		return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign);

	QString unit_string;
	if (unit == pv::util::TimeUnit::Time)
		unit_string = "s";
	// Note: In case of pv::util::TimeUnit::None, unit_string remains empty

	// View zoomed way out -> low precision (0), big distance (>=60s)
	// -> DD:HH:MM
	if ((precision == 0) && (distance >= limit))
		return pv::util::format_time_minutes(t, 0, sign);

	// View in "normal" range -> medium precision, medium step size
	// -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
	// View zoomed way in -> high precision (>3), low step size (<1s)
	// -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
	if (abs(t) < limit)
		return pv::util::format_time_si_adjusted(t, prefix, precision, unit_string, sign);
	else
		return pv::util::format_time_minutes(t, precision, sign);
}

pv::util::Timestamp Ruler::get_absolute_time_from_x_pos(uint32_t x) const
{
	return view_.offset() + ((double)x + 0.5) * view_.scale();
}

pv::util::Timestamp Ruler::get_ruler_time_from_x_pos(uint32_t x) const
{
	return view_.ruler_offset() + ((double)x + 0.5) * view_.scale();
}

pv::util::Timestamp Ruler::get_ruler_time_from_absolute_time(const pv::util::Timestamp& abs_time) const
{
	return abs_time + view_.zero_offset();
}

pv::util::Timestamp Ruler::get_absolute_time_from_ruler_time(const pv::util::Timestamp& ruler_time) const
{
	return ruler_time - view_.zero_offset();
}

void Ruler::contextMenuEvent(QContextMenuEvent *event)
{
	MarginWidget::contextMenuEvent(event);

	// Don't show a context menu if the MarginWidget found a widget that shows one
	if (event->isAccepted())
		return;

	context_menu_x_pos_ = event->pos().x();

	QMenu *const menu = new QMenu(this);

	QAction *const create_marker = new QAction(tr("Create marker here"), this);
	connect(create_marker, SIGNAL(triggered()), this, SLOT(on_createMarker()));
	menu->addAction(create_marker);

	QAction *const set_zero_position = new QAction(tr("Set as zero point"), this);
	connect(set_zero_position, SIGNAL(triggered()), this, SLOT(on_setZeroPosition()));
	menu->addAction(set_zero_position);

	QAction *const toggle_hover_marker = new QAction(this);
	connect(toggle_hover_marker, SIGNAL(triggered()), this, SLOT(on_toggleHoverMarker()));
	menu->addAction(toggle_hover_marker);

	GlobalSettings settings;
	const bool hover_marker_shown =
		settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
	toggle_hover_marker->setText(hover_marker_shown ?
		tr("Disable mouse hover marker") : tr("Enable mouse hover marker"));

	event->setAccepted(true);
	menu->popup(event->globalPos());
}

void Ruler::resizeEvent(QResizeEvent*)
{
	// the tick calculation depends on the width of this widget
	invalidate_tick_position_cache();
}

vector< shared_ptr<ViewItem> > Ruler::items()
{
	const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
	return vector< shared_ptr<ViewItem> >(
		time_items.begin(), time_items.end());
}

void Ruler::item_hover(const shared_ptr<ViewItem> &item, QPoint pos)
{
	(void)pos;

	hover_item_ = dynamic_pointer_cast<TimeItem>(item);
}

shared_ptr<TimeItem> Ruler::get_reference_item() const
{
	if (mouse_modifiers_ & Qt::ShiftModifier)
		return nullptr;

	if (hover_item_)
		return hover_item_;

	shared_ptr<TimeItem> ref_item;
	const vector< shared_ptr<TimeItem> > items(view_.time_items());

	for (auto i = items.rbegin(); i != items.rend(); i++) {
		if ((*i)->enabled() && (*i)->selected()) {
			if (!ref_item)
				ref_item = *i;
			else {
				// Return nothing if multiple items are selected
				ref_item.reset();
				break;
			}
		}
	}

	return ref_item;
}

shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
{
	const vector< shared_ptr<TimeItem> > items(view_.time_items());

	for (auto i = items.rbegin(); i != items.rend(); i++)
		if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt))
			return *i;

	return nullptr;
}

void Ruler::mouseDoubleClickEvent(QMouseEvent *event)
{
	hover_item_ = view_.add_flag(get_absolute_time_from_x_pos(event->x()));
}

void Ruler::paintEvent(QPaintEvent*)
{
	if (!tick_position_cache_) {
		auto ffunc = [this](const pv::util::Timestamp& t) {
			return format_time_with_distance(
				this->view_.tick_period(),
				t,
				this->view_.tick_prefix(),
				this->view_.time_unit(),
				this->view_.tick_precision());
		};

		tick_position_cache_ = calculate_tick_positions(
			view_.tick_period(),
			view_.ruler_offset(),
			view_.scale(),
			width(),
			view_.minor_tick_count(),
			ffunc);
	}

	const int ValueMargin = 3;

	const int text_height = calculate_text_height();
	const int ruler_height = RulerHeight * text_height;
	const int major_tick_y1 = text_height + ValueMargin * 2;
	const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;

	QPainter p(this);

	// Draw the tick marks
	p.setPen(palette().color(foregroundRole()));

	for (const auto& tick: tick_position_cache_->major) {
		const int leftedge = 0;
		const int rightedge = width();
		const int x_tick = tick.first;
		if ((x_tick > leftedge) && (x_tick < rightedge)) {
			const int x_left_bound = QFontMetrics(font()).width(tick.second) / 2;
			const int x_right_bound = rightedge - x_left_bound;
			const int x_legend = min(max(x_tick, x_left_bound), x_right_bound);
			p.drawText(x_legend, ValueMargin, 0, text_height,
				AlignCenter | AlignTop | TextDontClip, tick.second);
			p.drawLine(QPointF(x_tick, major_tick_y1),
			QPointF(tick.first, ruler_height));
		}
	}

	for (const auto& tick: tick_position_cache_->minor) {
		p.drawLine(QPointF(tick, minor_tick_y1),
				QPointF(tick, ruler_height));
	}

	// Draw the hover mark
	draw_hover_mark(p, text_height);

	p.setRenderHint(QPainter::Antialiasing);

	// The cursor labels are not drawn with the arrows exactly on the
	// bottom line of the widget, because then the selection shadow
	// would be clipped away.
	const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius);

	// Draw the items
	const vector< shared_ptr<TimeItem> > items(view_.time_items());
	for (auto &i : items) {
		const bool highlight = !item_dragging_ &&
			i->label_rect(r).contains(mouse_point_);
		i->paint_label(p, r, highlight);
	}
}

void Ruler::draw_hover_mark(QPainter &p, int text_height)
{
	const int x = view_.hover_point().x();

	if (x == -1)
		return;

	p.setPen(QPen(Qt::NoPen));
	p.setBrush(QBrush(palette().color(foregroundRole())));

	const int b = RulerHeight * text_height;
	const float hover_arrow_size = HoverArrowSize * text_height;
	const QPointF points[] = {
		QPointF(x, b),
		QPointF(x - hover_arrow_size, b - hover_arrow_size),
		QPointF(x + hover_arrow_size, b - hover_arrow_size)
	};
	p.drawPolygon(points, countof(points));
}

int Ruler::calculate_text_height() const
{
	return QFontMetrics(font()).ascent();
}

TickPositions Ruler::calculate_tick_positions(
	const pv::util::Timestamp& major_period,
	const pv::util::Timestamp& offset,
	const double scale,
	const int width,
	const unsigned int minor_tick_count,
	function<QString(const pv::util::Timestamp&)> format_function)
{
	TickPositions tp;

	const pv::util::Timestamp minor_period = major_period / minor_tick_count;
	const pv::util::Timestamp first_major_division = floor(offset / major_period);
	const pv::util::Timestamp first_minor_division = ceil(offset / minor_period);
	const pv::util::Timestamp t0 = first_major_division * major_period;

	int division = (round(first_minor_division -
		first_major_division * minor_tick_count)).convert_to<int>() - 1;

	double x;

	do {
		pv::util::Timestamp t = t0 + division * minor_period;
		x = ((t - offset) / scale).convert_to<double>();

		if (division % minor_tick_count == 0) {
			// Recalculate 't' without using 'minor_period' which is a fraction
			t = t0 + division / minor_tick_count * major_period;
			tp.major.emplace_back(x, format_function(t));
		} else {
			tp.minor.emplace_back(x);
		}

		division++;
	} while (x < width);

	return tp;
}

void Ruler::on_hover_point_changed(const QWidget* widget, const QPoint &hp)
{
	(void)widget;
	(void)hp;

	update();
}

void Ruler::invalidate_tick_position_cache()
{
	tick_position_cache_ = boost::none;
}

void Ruler::on_createMarker()
{
	hover_item_ = view_.add_flag(get_absolute_time_from_x_pos(mouse_down_point_.x()));
}

void Ruler::on_setZeroPosition()
{
	view_.set_zero_position(get_absolute_time_from_x_pos(mouse_down_point_.x()));
}

void Ruler::on_toggleHoverMarker()
{
	GlobalSettings settings;
	const bool state = settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
	settings.setValue(GlobalSettings::Key_View_ShowHoverMarker, !state);
}

} // namespace trace
} // namespace views
} // namespace pv
Commit	Line	Data
	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2012 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, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <extdef.h>
	21
	22	#include <QFontMetrics>
	23	#include <QMenu>
	24	#include <QMouseEvent>
	25
	26	#include <pv/globalsettings.hpp>
	27
	28	#include "ruler.hpp"
	29	#include "view.hpp"
	30
	31	using namespace Qt;
	32
	33	using std::function;
	34	using std::max;
	35	using std::min;
	36	using std::shared_ptr;
	37	using std::vector;
	38
	39	namespace pv {
	40	namespace views {
	41	namespace trace {
	42
	43	const float Ruler::RulerHeight = 2.5f; // x Text Height
	44
	45	const float Ruler::HoverArrowSize = 0.5f; // x Text Height
	46
	47	Ruler::Ruler(View &parent) :
	48	MarginWidget(parent)
	49	{
	50	setMouseTracking(true);
	51
	52	connect(&view_, SIGNAL(hover_point_changed(const QWidget*, QPoint)),
	53	this, SLOT(on_hover_point_changed(const QWidget*, QPoint)));
	54	connect(&view_, SIGNAL(offset_changed()),
	55	this, SLOT(invalidate_tick_position_cache()));
	56	connect(&view_, SIGNAL(scale_changed()),
	57	this, SLOT(invalidate_tick_position_cache()));
	58	connect(&view_, SIGNAL(tick_prefix_changed()),
	59	this, SLOT(invalidate_tick_position_cache()));
	60	connect(&view_, SIGNAL(tick_precision_changed()),
	61	this, SLOT(invalidate_tick_position_cache()));
	62	connect(&view_, SIGNAL(tick_period_changed()),
	63	this, SLOT(invalidate_tick_position_cache()));
	64	connect(&view_, SIGNAL(time_unit_changed()),
	65	this, SLOT(invalidate_tick_position_cache()));
	66	}
	67
	68	QSize Ruler::sizeHint() const
	69	{
	70	const int text_height = calculate_text_height();
	71	return QSize(0, RulerHeight * text_height);
	72	}
	73
	74	QSize Ruler::extended_size_hint() const
	75	{
	76	QRectF max_rect;
	77	vector< shared_ptr<TimeItem> > items(view_.time_items());
	78	for (auto &i : items)
	79	max_rect = max_rect.united(i->label_rect(QRect()));
	80	return QSize(0, sizeHint().height() - max_rect.top() / 2 +
	81	ViewItem::HighlightRadius);
	82	}
	83
	84	QString Ruler::format_time_with_distance(
	85	const pv::util::Timestamp& distance,
	86	const pv::util::Timestamp& t,
	87	pv::util::SIPrefix prefix,
	88	pv::util::TimeUnit unit,
	89	unsigned precision,
	90	bool sign)
	91	{
	92	const unsigned limit = 60;
	93
	94	if (t.is_zero())
	95	return "0";
	96
	97	// If we have to use samples then we have no alternative formats
	98	if (unit == pv::util::TimeUnit::Samples)
	99	return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign);
	100
	101	QString unit_string;
	102	if (unit == pv::util::TimeUnit::Time)
	103	unit_string = "s";
	104	// Note: In case of pv::util::TimeUnit::None, unit_string remains empty
	105
	106	// View zoomed way out -> low precision (0), big distance (>=60s)
	107	// -> DD:HH:MM
	108	if ((precision == 0) && (distance >= limit))
	109	return pv::util::format_time_minutes(t, 0, sign);
	110
	111	// View in "normal" range -> medium precision, medium step size
	112	// -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
	113	// View zoomed way in -> high precision (>3), low step size (<1s)
	114	// -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
	115	if (abs(t) < limit)
	116	return pv::util::format_time_si_adjusted(t, prefix, precision, unit_string, sign);
	117	else
	118	return pv::util::format_time_minutes(t, precision, sign);
	119	}
	120
	121	pv::util::Timestamp Ruler::get_absolute_time_from_x_pos(uint32_t x) const
	122	{
	123	return view_.offset() + ((double)x + 0.5) * view_.scale();
	124	}
	125
	126	pv::util::Timestamp Ruler::get_ruler_time_from_x_pos(uint32_t x) const
	127	{
	128	return view_.ruler_offset() + ((double)x + 0.5) * view_.scale();
	129	}
	130
	131	pv::util::Timestamp Ruler::get_ruler_time_from_absolute_time(const pv::util::Timestamp& abs_time) const
	132	{
	133	return abs_time + view_.zero_offset();
	134	}
	135
	136	pv::util::Timestamp Ruler::get_absolute_time_from_ruler_time(const pv::util::Timestamp& ruler_time) const
	137	{
	138	return ruler_time - view_.zero_offset();
	139	}
	140
	141	void Ruler::contextMenuEvent(QContextMenuEvent *event)
	142	{
	143	MarginWidget::contextMenuEvent(event);
	144
	145	// Don't show a context menu if the MarginWidget found a widget that shows one
	146	if (event->isAccepted())
	147	return;
	148
	149	context_menu_x_pos_ = event->pos().x();
	150
	151	QMenu *const menu = new QMenu(this);
	152
	153	QAction *const create_marker = new QAction(tr("Create marker here"), this);
	154	connect(create_marker, SIGNAL(triggered()), this, SLOT(on_createMarker()));
	155	menu->addAction(create_marker);
	156
	157	QAction *const set_zero_position = new QAction(tr("Set as zero point"), this);
	158	connect(set_zero_position, SIGNAL(triggered()), this, SLOT(on_setZeroPosition()));
	159	menu->addAction(set_zero_position);
	160
	161	QAction *const toggle_hover_marker = new QAction(this);
	162	connect(toggle_hover_marker, SIGNAL(triggered()), this, SLOT(on_toggleHoverMarker()));
	163	menu->addAction(toggle_hover_marker);
	164
	165	GlobalSettings settings;
	166	const bool hover_marker_shown =
	167	settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
	168	toggle_hover_marker->setText(hover_marker_shown ?
	169	tr("Disable mouse hover marker") : tr("Enable mouse hover marker"));
	170
	171	event->setAccepted(true);
	172	menu->popup(event->globalPos());
	173	}
	174
	175	void Ruler::resizeEvent(QResizeEvent*)
	176	{
	177	// the tick calculation depends on the width of this widget
	178	invalidate_tick_position_cache();
	179	}
	180
	181	vector< shared_ptr<ViewItem> > Ruler::items()
	182	{
	183	const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
	184	return vector< shared_ptr<ViewItem> >(
	185	time_items.begin(), time_items.end());
	186	}
	187
	188	void Ruler::item_hover(const shared_ptr<ViewItem> &item, QPoint pos)
	189	{
	190	(void)pos;
	191
	192	hover_item_ = dynamic_pointer_cast<TimeItem>(item);
	193	}
	194
	195	shared_ptr<TimeItem> Ruler::get_reference_item() const
	196	{
	197	if (mouse_modifiers_ & Qt::ShiftModifier)
	198	return nullptr;
	199
	200	if (hover_item_)
	201	return hover_item_;
	202
	203	shared_ptr<TimeItem> ref_item;
	204	const vector< shared_ptr<TimeItem> > items(view_.time_items());
	205
	206	for (auto i = items.rbegin(); i != items.rend(); i++) {
	207	if ((i)->enabled() && (i)->selected()) {
	208	if (!ref_item)
	209	ref_item = *i;
	210	else {
	211	// Return nothing if multiple items are selected
	212	ref_item.reset();
	213	break;
	214	}
	215	}
	216	}
	217
	218	return ref_item;
	219	}
	220
	221	shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
	222	{
	223	const vector< shared_ptr<TimeItem> > items(view_.time_items());
	224
	225	for (auto i = items.rbegin(); i != items.rend(); i++)
	226	if ((i)->enabled() && (i)->label_rect(rect()).contains(pt))
	227	return *i;
	228
	229	return nullptr;
	230	}
	231
	232	void Ruler::mouseDoubleClickEvent(QMouseEvent *event)
	233	{
	234	hover_item_ = view_.add_flag(get_absolute_time_from_x_pos(event->x()));
	235	}
	236
	237	void Ruler::paintEvent(QPaintEvent*)
	238	{
	239	if (!tick_position_cache_) {
	240	auto ffunc = [this](const pv::util::Timestamp& t) {
	241	return format_time_with_distance(
	242	this->view_.tick_period(),
	243	t,
	244	this->view_.tick_prefix(),
	245	this->view_.time_unit(),
	246	this->view_.tick_precision());
	247	};
	248
	249	tick_position_cache_ = calculate_tick_positions(
	250	view_.tick_period(),
	251	view_.ruler_offset(),
	252	view_.scale(),
	253	width(),
	254	view_.minor_tick_count(),
	255	ffunc);
	256	}
	257
	258	const int ValueMargin = 3;
	259
	260	const int text_height = calculate_text_height();
	261	const int ruler_height = RulerHeight * text_height;
	262	const int major_tick_y1 = text_height + ValueMargin * 2;
	263	const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
	264
	265	QPainter p(this);
	266
	267	// Draw the tick marks
	268	p.setPen(palette().color(foregroundRole()));
	269
	270	for (const auto& tick: tick_position_cache_->major) {
	271	const int leftedge = 0;
	272	const int rightedge = width();
	273	const int x_tick = tick.first;
	274	if ((x_tick > leftedge) && (x_tick < rightedge)) {
	275	const int x_left_bound = QFontMetrics(font()).width(tick.second) / 2;
	276	const int x_right_bound = rightedge - x_left_bound;
	277	const int x_legend = min(max(x_tick, x_left_bound), x_right_bound);
	278	p.drawText(x_legend, ValueMargin, 0, text_height,
	279	AlignCenter \| AlignTop \| TextDontClip, tick.second);
	280	p.drawLine(QPointF(x_tick, major_tick_y1),
	281	QPointF(tick.first, ruler_height));
	282	}
	283	}
	284
	285	for (const auto& tick: tick_position_cache_->minor) {
	286	p.drawLine(QPointF(tick, minor_tick_y1),
	287	QPointF(tick, ruler_height));
	288	}
	289
	290	// Draw the hover mark
	291	draw_hover_mark(p, text_height);
	292
	293	p.setRenderHint(QPainter::Antialiasing);
	294
	295	// The cursor labels are not drawn with the arrows exactly on the
	296	// bottom line of the widget, because then the selection shadow
	297	// would be clipped away.
	298	const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius);
	299
	300	// Draw the items
	301	const vector< shared_ptr<TimeItem> > items(view_.time_items());
	302	for (auto &i : items) {
	303	const bool highlight = !item_dragging_ &&
	304	i->label_rect(r).contains(mouse_point_);
	305	i->paint_label(p, r, highlight);
	306	}
	307	}
	308
	309	void Ruler::draw_hover_mark(QPainter &p, int text_height)
	310	{
	311	const int x = view_.hover_point().x();
	312
	313	if (x == -1)
	314	return;
	315
	316	p.setPen(QPen(Qt::NoPen));
	317	p.setBrush(QBrush(palette().color(foregroundRole())));
	318
	319	const int b = RulerHeight * text_height;
	320	const float hover_arrow_size = HoverArrowSize * text_height;
	321	const QPointF points[] = {
	322	QPointF(x, b),
	323	QPointF(x - hover_arrow_size, b - hover_arrow_size),
	324	QPointF(x + hover_arrow_size, b - hover_arrow_size)
	325	};
	326	p.drawPolygon(points, countof(points));
	327	}
	328
	329	int Ruler::calculate_text_height() const
	330	{
	331	return QFontMetrics(font()).ascent();
	332	}
	333
	334	TickPositions Ruler::calculate_tick_positions(
	335	const pv::util::Timestamp& major_period,
	336	const pv::util::Timestamp& offset,
	337	const double scale,
	338	const int width,
	339	const unsigned int minor_tick_count,
	340	function<QString(const pv::util::Timestamp&)> format_function)
	341	{
	342	TickPositions tp;
	343
	344	const pv::util::Timestamp minor_period = major_period / minor_tick_count;
	345	const pv::util::Timestamp first_major_division = floor(offset / major_period);
	346	const pv::util::Timestamp first_minor_division = ceil(offset / minor_period);
	347	const pv::util::Timestamp t0 = first_major_division * major_period;
	348
	349	int division = (round(first_minor_division -
	350	first_major_division * minor_tick_count)).convert_to<int>() - 1;
	351
	352	double x;
	353
	354	do {
	355	pv::util::Timestamp t = t0 + division * minor_period;
	356	x = ((t - offset) / scale).convert_to<double>();
	357
	358	if (division % minor_tick_count == 0) {
	359	// Recalculate 't' without using 'minor_period' which is a fraction
	360	t = t0 + division / minor_tick_count * major_period;
	361	tp.major.emplace_back(x, format_function(t));
	362	} else {
	363	tp.minor.emplace_back(x);
	364	}
	365
	366	division++;
	367	} while (x < width);
	368
	369	return tp;
	370	}
	371
	372	void Ruler::on_hover_point_changed(const QWidget* widget, const QPoint &hp)
	373	{
	374	(void)widget;
	375	(void)hp;
	376
	377	update();
	378	}
	379
	380	void Ruler::invalidate_tick_position_cache()
	381	{
	382	tick_position_cache_ = boost::none;
	383	}
	384
	385	void Ruler::on_createMarker()
	386	{
	387	hover_item_ = view_.add_flag(get_absolute_time_from_x_pos(mouse_down_point_.x()));
	388	}
	389
	390	void Ruler::on_setZeroPosition()
	391	{
	392	view_.set_zero_position(get_absolute_time_from_x_pos(mouse_down_point_.x()));
	393	}
	394
	395	void Ruler::on_toggleHoverMarker()
	396	{
	397	GlobalSettings settings;
	398	const bool state = settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
	399	settings.setValue(GlobalSettings::Key_View_ShowHoverMarker, !state);
	400	}
	401
	402	} // namespace trace
	403	} // namespace views
	404	} // namespace pv