[pulseview.git] / pv / view / view.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, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#ifdef ENABLE_DECODE
#include <libsigrokdecode/libsigrokdecode.h>
#endif

#include <assert.h>
#include <limits.h>
#include <math.h>

#include <QEvent>
#include <QMouseEvent>
#include <QScrollBar>

#include "cursorheader.h"
#include "decodetrace.h"
#include "header.h"
#include "ruler.h"
#include "signal.h"
#include "view.h"
#include "viewport.h"

#include "pv/sigsession.h"
#include "pv/data/logic.h"
#include "pv/data/logicsnapshot.h"

using pv::data::SignalData;
using std::deque;
using std::list;
using std::max;
using std::make_pair;
using std::min;
using std::pair;
using std::set;
using std::shared_ptr;
using std::vector;
using std::weak_ptr;

namespace pv {
namespace view {

const double View::MaxScale = 1e9;
const double View::MinScale = 1e-15;

const int View::MaxScrollValue = INT_MAX / 2;

const int View::SignalHeight = 30;
const int View::SignalMargin = 10;
const int View::SignalSnapGridSize = 10;

const QColor View::CursorAreaColour(220, 231, 243);

const QSizeF View::LabelPadding(4, 0);

View::View(SigSession &session, QWidget *parent) :
	QAbstractScrollArea(parent),
	_session(session),
	_viewport(new Viewport(*this)),
	_ruler(new Ruler(*this)),
	_cursorheader(new CursorHeader(*this)),
	_header(new Header(*this)),
	_scale(1e-6),
	_offset(0),
	_v_offset(0),
	_updating_scroll(false),
	_show_cursors(false),
	_cursors(*this),
	_hover_point(-1, -1)
{
	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
		this, SLOT(h_scroll_value_changed(int)));
	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
		this, SLOT(v_scroll_value_changed(int)));

	connect(&_session, SIGNAL(signals_changed()),
		this, SLOT(signals_changed()));
	connect(&_session, SIGNAL(capture_state_changed(int)),
		this, SLOT(data_updated()));
	connect(&_session, SIGNAL(data_received()),
		this, SLOT(data_updated()));
	connect(&_session, SIGNAL(frame_ended()),
		this, SLOT(data_updated()));

	connect(_cursors.first().get(), SIGNAL(time_changed()),
		this, SLOT(marker_time_changed()));
	connect(_cursors.second().get(), SIGNAL(time_changed()),
		this, SLOT(marker_time_changed()));

	connect(_header, SIGNAL(geometry_updated()),
		this, SLOT(on_geometry_updated()));
	connect(_header, SIGNAL(signals_moved()),
		this, SLOT(on_signals_moved()));

	connect(_header, SIGNAL(selection_changed()),
		_cursorheader, SLOT(clear_selection()));
	connect(_cursorheader, SIGNAL(selection_changed()),
		_header, SLOT(clear_selection()));

	connect(_header, SIGNAL(selection_changed()),
		this, SIGNAL(selection_changed()));
	connect(_cursorheader, SIGNAL(selection_changed()),
		this, SIGNAL(selection_changed()));

	setViewport(_viewport);

	_viewport->installEventFilter(this);
	_ruler->installEventFilter(this);
	_cursorheader->installEventFilter(this);
	_header->installEventFilter(this);

	// Trigger the initial event manually. The default device has signals
	// which were created before this object came into being
	signals_changed();

	// make sure the transparent widgets are on the top
	_cursorheader->raise();
	_header->raise();
}

SigSession& View::session()
{
	return _session;
}

const SigSession& View::session() const
{
	return _session;
}

double View::scale() const
{
	return _scale;
}

double View::offset() const
{
	return _offset;
}

int View::v_offset() const
{
	return _v_offset;
}

void View::zoom(double steps)
{
	zoom(steps, _viewport->width() / 2);
}

void View::zoom(double steps, int offset)
{
	set_zoom(_scale * pow(3.0/2.0, -steps), offset);
}

void View::zoom_fit()
{
	const pair<double, double> extents = get_time_extents();
	const double delta = extents.second - extents.first;
	if (delta < 1e-12)
		return;

	assert(_viewport);
	const int w = _viewport->width();
	if (w <= 0)
		return;

	const double scale = max(min(delta / w, MaxScale), MinScale);
	set_scale_offset(scale, extents.first);
}

void View::zoom_one_to_one()
{
	using pv::data::SignalData;

	const vector< shared_ptr<Signal> > sigs(
		session().get_signals());

	// Make a set of all the visible data objects
	set< shared_ptr<SignalData> > visible_data = get_visible_data();
	if (visible_data.empty())
		return;

	double samplerate = 0.0;
	for (const shared_ptr<SignalData> d : visible_data) {
		assert(d);
		samplerate = max(samplerate, d->samplerate());
	}

	if (samplerate == 0.0)
		return;

	assert(_viewport);
	const int w = _viewport->width();
	if (w <= 0)
		return;

	set_zoom(1.0 / samplerate, w / 2);
}

void View::set_scale_offset(double scale, double offset)
{
	_scale = scale;
	_offset = offset;

	update_scroll();
	_ruler->update();
	_cursorheader->update();
	_viewport->update();
	scale_offset_changed();
}

vector< shared_ptr<Trace> > View::get_traces() const
{
	const vector< shared_ptr<Signal> > sigs(
		session().get_signals());
#ifdef ENABLE_DECODE
	const vector< shared_ptr<DecodeTrace> > decode_sigs(
		session().get_decode_signals());
	vector< shared_ptr<Trace> > traces(
		sigs.size() + decode_sigs.size());
#else
	vector< shared_ptr<Trace> > traces(sigs.size());
#endif

	auto i = traces.begin();
	i = copy(sigs.begin(), sigs.end(), i);
#ifdef ENABLE_DECODE
	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
#endif

	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
	return traces;
}

list<weak_ptr<SelectableItem> > View::selected_items() const
{
	list<weak_ptr<SelectableItem> > items;

	// List the selected signals
	const vector< shared_ptr<Trace> > traces(get_traces());
	for (shared_ptr<Trace> t : traces) {
		assert(t);
		if (t->selected())
			items.push_back(t);
	}

	// List the selected cursors
	if (_cursors.first()->selected())
		items.push_back(_cursors.first());
	if (_cursors.second()->selected())
		items.push_back(_cursors.second());

	return items;
}

set< shared_ptr<SignalData> > View::get_visible_data() const
{
	const vector< shared_ptr<Signal> > sigs(
		session().get_signals());

	// Make a set of all the visible data objects
	set< shared_ptr<SignalData> > visible_data;
	for (const shared_ptr<Signal> sig : sigs)
		if (sig->enabled())
			visible_data.insert(sig->data());

	return visible_data;
}

pair<double, double> View::get_time_extents() const
{
	const set< shared_ptr<SignalData> > visible_data = get_visible_data();
	if (visible_data.empty())
		return make_pair(0.0, 0.0);

	double left_time = DBL_MAX, right_time = DBL_MIN;
	for (const shared_ptr<SignalData> d : visible_data)
	{
		const double start_time = d->get_start_time();
		double samplerate = d->samplerate();
		samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;

		left_time = min(left_time, start_time);
		right_time = max(right_time, start_time +
			d->get_max_sample_count() / samplerate);
	}

	assert(left_time < right_time);
	return make_pair(left_time, right_time);
}

bool View::cursors_shown() const
{
	return _show_cursors;
}

void View::show_cursors(bool show)
{
	_show_cursors = show;
	_cursorheader->update();
	_viewport->update();
}

void View::centre_cursors()
{
	const double time_width = _scale * _viewport->width();
	_cursors.first()->set_time(_offset + time_width * 0.4);
	_cursors.second()->set_time(_offset + time_width * 0.6);
	_cursorheader->update();
	_viewport->update();
}

CursorPair& View::cursors()
{
	return _cursors;
}

const CursorPair& View::cursors() const
{
	return _cursors;
}

const QPoint& View::hover_point() const
{
	return _hover_point;
}

void View::normalize_layout()
{
	const vector< shared_ptr<Trace> > traces(get_traces());

	int v_min = INT_MAX;
	for (const shared_ptr<Trace> t : traces)
		v_min = min(t->get_v_offset(), v_min);

	const int delta = -min(v_min, 0);
	for (shared_ptr<Trace> t : traces)
		t->set_v_offset(t->get_v_offset() + delta);

	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
}

void View::update_viewport()
{
	assert(_viewport);
	_viewport->update();
}

void View::get_scroll_layout(double &length, double &offset) const
{
	const pair<double, double> extents = get_time_extents();
	length = (extents.second - extents.first) / _scale;
	offset = _offset / _scale;
}

void View::set_zoom(double scale, int offset)
{
	const double cursor_offset = _offset + _scale * offset;
	const double new_scale = max(min(scale, MaxScale), MinScale);
	const double new_offset = cursor_offset - new_scale * offset;
	set_scale_offset(new_scale, new_offset);
}

void View::update_scroll()
{
	assert(_viewport);

	const QSize areaSize = _viewport->size();

	// Set the horizontal scroll bar
	double length = 0, offset = 0;
	get_scroll_layout(length, offset);
	length = max(length - areaSize.width(), 0.0);

	horizontalScrollBar()->setPageStep(areaSize.width() / 2);

	_updating_scroll = true;

	if (length < MaxScrollValue) {
		horizontalScrollBar()->setRange(0, length);
		horizontalScrollBar()->setSliderPosition(offset);
	} else {
		horizontalScrollBar()->setRange(0, MaxScrollValue);
		horizontalScrollBar()->setSliderPosition(
			_offset * MaxScrollValue / (_scale * length));
	}

	_updating_scroll = false;

	// Set the vertical scrollbar
	verticalScrollBar()->setPageStep(areaSize.height());
	verticalScrollBar()->setRange(0,
		_viewport->get_total_height() + SignalMargin -
		areaSize.height());
}

void View::update_layout()
{
	setViewportMargins(
		_header->sizeHint().width() - pv::view::Header::BaselineOffset,
		_ruler->sizeHint().height(), 0, 0);
	_ruler->setGeometry(_viewport->x(), 0,
		_viewport->width(), _viewport->y());
	_cursorheader->setGeometry(
		_viewport->x(),
		_ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2,
		_viewport->width(), _cursorheader->sizeHint().height());
	_header->setGeometry(0, _viewport->y(),
		_header->sizeHint().width(), _viewport->height());
	update_scroll();
}

bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	const shared_ptr<Trace> &b)
{
	assert(a);
	assert(b);
	return a->get_v_offset() < b->get_v_offset();
}

bool View::eventFilter(QObject *object, QEvent *event)
{
	const QEvent::Type type = event->type();
	if (type == QEvent::MouseMove) {

		const QMouseEvent *const mouse_event = (QMouseEvent*)event;
		if (object == _viewport)
			_hover_point = mouse_event->pos();
		else if (object == _ruler || object == _cursorheader)
			_hover_point = QPoint(mouse_event->x(), 0);
		else if (object == _header)
			_hover_point = QPoint(0, mouse_event->y());
		else
			_hover_point = QPoint(-1, -1);

		hover_point_changed();

	} else if (type == QEvent::Leave) {
		_hover_point = QPoint(-1, -1);
		hover_point_changed();
	}

	return QObject::eventFilter(object, event);
}

bool View::viewportEvent(QEvent *e)
{
	switch(e->type()) {
	case QEvent::Paint:
	case QEvent::MouseButtonPress:
	case QEvent::MouseButtonRelease:
	case QEvent::MouseButtonDblClick:
	case QEvent::MouseMove:
	case QEvent::Wheel:
	case QEvent::TouchBegin:
	case QEvent::TouchUpdate:
	case QEvent::TouchEnd:
		return false;

	default:
		return QAbstractScrollArea::viewportEvent(e);
	}
}

void View::resizeEvent(QResizeEvent*)
{
	update_layout();
}

void View::h_scroll_value_changed(int value)
{
	if (_updating_scroll)
		return;

	const int range = horizontalScrollBar()->maximum();
	if (range < MaxScrollValue)
		_offset = _scale * value;
	else {
		double length = 0, offset;
		get_scroll_layout(length, offset);
		_offset = _scale * length * value / MaxScrollValue;
	}

	_ruler->update();
	_cursorheader->update();
	_viewport->update();
}

void View::v_scroll_value_changed(int value)
{
	_v_offset = value;
	_header->update();
	_viewport->update();
}

void View::signals_changed()
{
	int offset = SignalMargin + SignalHeight;
	const vector< shared_ptr<Trace> > traces(get_traces());
	for (shared_ptr<Trace> t : traces) {
		t->set_view(this);
		t->set_v_offset(offset);
		offset += SignalHeight + 2 * SignalMargin;
	}

	update_layout();
	normalize_layout();
}

void View::data_updated()
{
	// Update the scroll bars
	update_scroll();

	// Repaint the view
	_viewport->update();
}

void View::marker_time_changed()
{
	_cursorheader->update();
	_viewport->update();
}

void View::on_signals_moved()
{
	update_scroll();
	signals_moved();
}

void View::on_geometry_updated()
{
	update_layout();
}

} // namespace view
} // namespace pv
Commit	Line	Data
adb4b10c	1	/*
b3f22de0	2	* This file is part of the PulseView project.
adb4b10c JH	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, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
269528f5	21	#ifdef ENABLE_DECODE
4e5a4405	22	#include <libsigrokdecode/libsigrokdecode.h>
269528f5	23	#endif
4e5a4405	24
adb4b10c	25	#include <assert.h>
f25770e2	26	#include <limits.h>
adb4b10c JH	27	#include <math.h>
adb4b10c JH	28
adb4b10c	29	#include <QEvent>
cbd80f64	30	#include <QMouseEvent>
adb4b10c JH	31	#include <QScrollBar>
adb4b10c JH	32
84a0d458	33	#include "cursorheader.h"
b9329558	34	#include "decodetrace.h"
1d8dca91	35	#include "header.h"
ccdd3ef5	36	#include "ruler.h"
2e575351	37	#include "signal.h"
cdf7bea7 JH	38	#include "view.h"
cdf7bea7 JH	39	#include "viewport.h"
adb4b10c	40
1b1ec774 JH	41	#include "pv/sigsession.h"
	42	#include "pv/data/logic.h"
	43	#include "pv/data/logicsnapshot.h"
adb4b10c	44
1bc6525b	45	using pv::data::SignalData;
819f4c25 JH	46	using std::deque;
	47	using std::list;
	48	using std::max;
1bc6525b	49	using std::make_pair;
819f4c25	50	using std::min;
1bc6525b	51	using std::pair;
819f4c25	52	using std::set;
f9abf97e	53	using std::shared_ptr;
819f4c25	54	using std::vector;
f9abf97e	55	using std::weak_ptr;
adb4b10c	56
cdf7bea7 JH	57	namespace pv {
cdf7bea7 JH	58	namespace view {
adb4b10c	59
cdf7bea7 JH	60	const double View::MaxScale = 1e9;
cdf7bea7 JH	61	const double View::MinScale = 1e-15;
adb4b10c	62
f25770e2 JH	63	const int View::MaxScrollValue = INT_MAX / 2;
f25770e2 JH	64
8d44d030 JH	65	const int View::SignalHeight = 30;
8d44d030 JH	66	const int View::SignalMargin = 10;
49153683	67	const int View::SignalSnapGridSize = 10;
1d8dca91	68
f76af637 JH	69	const QColor View::CursorAreaColour(220, 231, 243);
f76af637 JH	70
2e04f9bd JH	71	const QSizeF View::LabelPadding(4, 0);
2e04f9bd JH	72
cdf7bea7	73	View::View(SigSession &session, QWidget *parent) :
adb4b10c JH	74	QAbstractScrollArea(parent),
adb4b10c JH	75	_session(session),
cdf7bea7	76	_viewport(new Viewport(*this)),
ccdd3ef5	77	_ruler(new Ruler(*this)),
84a0d458	78	_cursorheader(new CursorHeader(*this)),
1d8dca91	79	_header(new Header(*this)),
adb4b10c JH	80	_scale(1e-6),
adb4b10c JH	81	_offset(0),
cbd80f64	82	_v_offset(0),
528bd8a1	83	_updating_scroll(false),
f76af637	84	_show_cursors(false),
b42d25c4	85	_cursors(*this),
cbd80f64	86	_hover_point(-1, -1)
adb4b10c	87	{
b16907d3 JH	88	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
b16907d3 JH	89	this, SLOT(h_scroll_value_changed(int)));
adb4b10c JH	90	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
adb4b10c JH	91	this, SLOT(v_scroll_value_changed(int)));
69dd2b03 JH	92
	93	connect(&_session, SIGNAL(signals_changed()),
	94	this, SLOT(signals_changed()));
50f97924 PZ	95	connect(&_session, SIGNAL(capture_state_changed(int)),
50f97924 PZ	96	this, SLOT(data_updated()));
1f374035 JH	97	connect(&_session, SIGNAL(data_received()),
	98	this, SLOT(data_updated()));
	99	connect(&_session, SIGNAL(frame_ended()),
adb4b10c	100	this, SLOT(data_updated()));
1d8dca91	101
58864c5c	102	connect(_cursors.first().get(), SIGNAL(time_changed()),
ca4ec3ea	103	this, SLOT(marker_time_changed()));
58864c5c	104	connect(_cursors.second().get(), SIGNAL(time_changed()),
ca4ec3ea JH	105	this, SLOT(marker_time_changed()));
ca4ec3ea JH	106
d7c0ca4a JH	107	connect(_header, SIGNAL(geometry_updated()),
d7c0ca4a JH	108	this, SLOT(on_geometry_updated()));
54401bbb	109	connect(_header, SIGNAL(signals_moved()),
07204819	110	this, SLOT(on_signals_moved()));
54401bbb	111
17348f85	112	connect(_header, SIGNAL(selection_changed()),
84a0d458 JS	113	_cursorheader, SLOT(clear_selection()));
84a0d458 JS	114	connect(_cursorheader, SIGNAL(selection_changed()),
17348f85 JH	115	_header, SLOT(clear_selection()));
17348f85 JH	116
8b454527 JH	117	connect(_header, SIGNAL(selection_changed()),
8b454527 JH	118	this, SIGNAL(selection_changed()));
84a0d458	119	connect(_cursorheader, SIGNAL(selection_changed()),
8b454527 JH	120	this, SIGNAL(selection_changed()));
8b454527 JH	121
adb4b10c	122	setViewport(_viewport);
cbd80f64 JH	123
	124	_viewport->installEventFilter(this);
	125	_ruler->installEventFilter(this);
84a0d458	126	_cursorheader->installEventFilter(this);
cbd80f64	127	_header->installEventFilter(this);
d873f4d6	128
9f46d905 JH	129	// Trigger the initial event manually. The default device has signals
9f46d905 JH	130	// which were created before this object came into being
d873f4d6	131	signals_changed();
84a0d458	132
512bfc56	133	// make sure the transparent widgets are on the top
84a0d458	134	_cursorheader->raise();
512bfc56	135	_header->raise();
adb4b10c JH	136	}
adb4b10c JH	137
1d19ef83 JH	138	SigSession& View::session()
	139	{
	140	return _session;
	141	}
	142
38eeddea JH	143	const SigSession& View::session() const
	144	{
	145	return _session;
	146	}
	147
cdf7bea7	148	double View::scale() const
adb4b10c JH	149	{
	150	return _scale;
	151	}
	152
cdf7bea7	153	double View::offset() const
adb4b10c JH	154	{
	155	return _offset;
	156	}
	157
cdf7bea7	158	int View::v_offset() const
adb4b10c JH	159	{
	160	return _v_offset;
	161	}
	162
cdf7bea7	163	void View::zoom(double steps)
adb4b10c	164	{
f3f98f8f	165	zoom(steps, _viewport->width() / 2);
adb4b10c JH	166	}
adb4b10c JH	167
17c0f398 JH	168	void View::zoom(double steps, int offset)
17c0f398 JH	169	{
8b2e2a9a	170	set_zoom(_scale * pow(3.0/2.0, -steps), offset);
17c0f398 JH	171	}
17c0f398 JH	172
ca46b534 JH	173	void View::zoom_fit()
ca46b534 JH	174	{
1bc6525b JH	175	const pair<double, double> extents = get_time_extents();
	176	const double delta = extents.second - extents.first;
	177	if (delta < 1e-12)
ca46b534 JH	178	return;
	179
	180	assert(_viewport);
	181	const int w = _viewport->width();
	182	if (w <= 0)
	183	return;
	184
78311127 JH	185	const double scale = max(min(delta / w, MaxScale), MinScale);
78311127 JH	186	set_scale_offset(scale, extents.first);
ca46b534 JH	187	}
ca46b534 JH	188
d1e7d82c JH	189	void View::zoom_one_to_one()
	190	{
	191	using pv::data::SignalData;
	192
	193	const vector< shared_ptr<Signal> > sigs(
	194	session().get_signals());
	195
	196	// Make a set of all the visible data objects
0fc664a9	197	set< shared_ptr<SignalData> > visible_data = get_visible_data();
d1e7d82c JH	198	if (visible_data.empty())
	199	return;
	200
	201	double samplerate = 0.0;
d9aecf1f	202	for (const shared_ptr<SignalData> d : visible_data) {
d1e7d82c JH	203	assert(d);
	204	samplerate = max(samplerate, d->samplerate());
	205	}
	206
	207	if (samplerate == 0.0)
	208	return;
	209
	210	assert(_viewport);
	211	const int w = _viewport->width();
	212	if (w <= 0)
	213	return;
	214
	215	set_zoom(1.0 / samplerate, w / 2);
	216	}
	217
cdf7bea7	218	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	219	{
	220	_scale = scale;
	221	_offset = offset;
ccdd3ef5	222
adb4b10c	223	update_scroll();
ccdd3ef5	224	_ruler->update();
84a0d458	225	_cursorheader->update();
adb4b10c	226	_viewport->update();
e0fc5810	227	scale_offset_changed();
adb4b10c JH	228	}
adb4b10c JH	229
38eeddea JH	230	vector< shared_ptr<Trace> > View::get_traces() const
	231	{
	232	const vector< shared_ptr<Signal> > sigs(
	233	session().get_signals());
269528f5	234	#ifdef ENABLE_DECODE
b9329558	235	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	236	session().get_decode_signals());
	237	vector< shared_ptr<Trace> > traces(
	238	sigs.size() + decode_sigs.size());
269528f5 JH	239	#else
	240	vector< shared_ptr<Trace> > traces(sigs.size());
	241	#endif
38eeddea	242
f46e495e	243	auto i = traces.begin();
38eeddea	244	i = copy(sigs.begin(), sigs.end(), i);
269528f5	245	#ifdef ENABLE_DECODE
38eeddea	246	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
269528f5	247	#endif
38eeddea	248
9a2bc5fc	249	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	250	return traces;
	251	}
	252
94936133 JH	253	list<weak_ptr<SelectableItem> > View::selected_items() const
	254	{
	255	list<weak_ptr<SelectableItem> > items;
	256
	257	// List the selected signals
38eeddea	258	const vector< shared_ptr<Trace> > traces(get_traces());
d9aecf1f	259	for (shared_ptr<Trace> t : traces) {
38eeddea JH	260	assert(t);
	261	if (t->selected())
	262	items.push_back(t);
94936133 JH	263	}
	264
	265	// List the selected cursors
	266	if (_cursors.first()->selected())
	267	items.push_back(_cursors.first());
	268	if (_cursors.second()->selected())
	269	items.push_back(_cursors.second());
	270
	271	return items;
	272	}
	273
1bc6525b JH	274	set< shared_ptr<SignalData> > View::get_visible_data() const
	275	{
	276	const vector< shared_ptr<Signal> > sigs(
	277	session().get_signals());
	278
	279	// Make a set of all the visible data objects
	280	set< shared_ptr<SignalData> > visible_data;
d9aecf1f	281	for (const shared_ptr<Signal> sig : sigs)
1bc6525b JH	282	if (sig->enabled())
	283	visible_data.insert(sig->data());
	284
	285	return visible_data;
	286	}
	287
	288	pair<double, double> View::get_time_extents() const
	289	{
	290	const set< shared_ptr<SignalData> > visible_data = get_visible_data();
	291	if (visible_data.empty())
	292	return make_pair(0.0, 0.0);
	293
	294	double left_time = DBL_MAX, right_time = DBL_MIN;
d9aecf1f	295	for (const shared_ptr<SignalData> d : visible_data)
1bc6525b JH	296	{
1bc6525b JH	297	const double start_time = d->get_start_time();
a472a884 JH	298	double samplerate = d->samplerate();
	299	samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
	300
1bc6525b JH	301	left_time = min(left_time, start_time);
1bc6525b JH	302	right_time = max(right_time, start_time +
a472a884	303	d->get_max_sample_count() / samplerate);
1bc6525b JH	304	}
	305
	306	assert(left_time < right_time);
	307	return make_pair(left_time, right_time);
	308	}
	309
f76af637 JH	310	bool View::cursors_shown() const
	311	{
	312	return _show_cursors;
	313	}
	314
	315	void View::show_cursors(bool show)
	316	{
	317	_show_cursors = show;
84a0d458	318	_cursorheader->update();
f76af637 JH	319	_viewport->update();
	320	}
	321
b4d91e56 JH	322	void View::centre_cursors()
	323	{
	324	const double time_width = _scale * _viewport->width();
58864c5c JH	325	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	326	_cursors.second()->set_time(_offset + time_width * 0.6);
84a0d458	327	_cursorheader->update();
b4d91e56 JH	328	_viewport->update();
	329	}
	330
b42d25c4	331	CursorPair& View::cursors()
f76af637 JH	332	{
	333	return _cursors;
	334	}
	335
58864c5c JH	336	const CursorPair& View::cursors() const
	337	{
	338	return _cursors;
	339	}
	340
cbd80f64 JH	341	const QPoint& View::hover_point() const
	342	{
	343	return _hover_point;
	344	}
	345
4b192962 JH	346	void View::normalize_layout()
4b192962 JH	347	{
38eeddea	348	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	349
4b192962 JH	350	int v_min = INT_MAX;
d9aecf1f	351	for (const shared_ptr<Trace> t : traces)
38eeddea	352	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	353
4b192962 JH	354	const int delta = -min(v_min, 0);
d9aecf1f	355	for (shared_ptr<Trace> t : traces)
38eeddea	356	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	357
	358	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	359	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	360	}
	361
9cef9567 JH	362	void View::update_viewport()
	363	{
	364	assert(_viewport);
	365	_viewport->update();
	366	}
	367
f25770e2 JH	368	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	369	{
1bc6525b JH	370	const pair<double, double> extents = get_time_extents();
1bc6525b JH	371	length = (extents.second - extents.first) / _scale;
f25770e2 JH	372	offset = _offset / _scale;
	373	}
	374
d1e7d82c JH	375	void View::set_zoom(double scale, int offset)
	376	{
	377	const double cursor_offset = _offset + _scale * offset;
	378	const double new_scale = max(min(scale, MaxScale), MinScale);
	379	const double new_offset = cursor_offset - new_scale * offset;
	380	set_scale_offset(new_scale, new_offset);
	381	}
	382
cdf7bea7	383	void View::update_scroll()
adb4b10c JH	384	{
	385	assert(_viewport);
	386
	387	const QSize areaSize = _viewport->size();
	388
	389	// Set the horizontal scroll bar
	390	double length = 0, offset = 0;
f25770e2 JH	391	get_scroll_layout(length, offset);
f25770e2 JH	392	length = max(length - areaSize.width(), 0.0);
adb4b10c	393
b4ef7f2a	394	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	395
528bd8a1 JH	396	_updating_scroll = true;
528bd8a1 JH	397
333d5bbc	398	if (length < MaxScrollValue) {
f25770e2 JH	399	horizontalScrollBar()->setRange(0, length);
	400	horizontalScrollBar()->setSliderPosition(offset);
	401	} else {
	402	horizontalScrollBar()->setRange(0, MaxScrollValue);
	403	horizontalScrollBar()->setSliderPosition(
	404	_offset * MaxScrollValue / (_scale * length));
	405	}
adb4b10c	406
528bd8a1 JH	407	_updating_scroll = false;
528bd8a1 JH	408
adb4b10c JH	409	// Set the vertical scrollbar
	410	verticalScrollBar()->setPageStep(areaSize.height());
	411	verticalScrollBar()->setRange(0,
4b192962 JH	412	_viewport->get_total_height() + SignalMargin -
4b192962 JH	413	areaSize.height());
adb4b10c JH	414	}
adb4b10c JH	415
d7c0ca4a JH	416	void View::update_layout()
d7c0ca4a JH	417	{
512bfc56 JS	418	setViewportMargins(
512bfc56 JS	419	_header->sizeHint().width() - pv::view::Header::BaselineOffset,
a6c1726e	420	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	421	_ruler->setGeometry(_viewport->x(), 0,
d7c0ca4a JH	422	_viewport->width(), _viewport->y());
84a0d458 JS	423	_cursorheader->setGeometry(
	424	_viewport->x(),
	425	_ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2,
	426	_viewport->width(), _cursorheader->sizeHint().height());
d7c0ca4a	427	_header->setGeometry(0, _viewport->y(),
512bfc56	428	_header->sizeHint().width(), _viewport->height());
d7c0ca4a JH	429	update_scroll();
	430	}
	431
38eeddea JH	432	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	433	const shared_ptr<Trace> &b)
	434	{
	435	assert(a);
	436	assert(b);
	437	return a->get_v_offset() < b->get_v_offset();
	438	}
	439
cbd80f64 JH	440	bool View::eventFilter(QObject object, QEvent event)
	441	{
	442	const QEvent::Type type = event->type();
333d5bbc	443	if (type == QEvent::MouseMove) {
cbd80f64 JH	444
cbd80f64 JH	445	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	446	if (object == _viewport)
cbd80f64	447	_hover_point = mouse_event->pos();
84a0d458	448	else if (object == _ruler \|\| object == _cursorheader)
cbd80f64	449	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	450	else if (object == _header)
cbd80f64 JH	451	_hover_point = QPoint(0, mouse_event->y());
	452	else
	453	_hover_point = QPoint(-1, -1);
	454
	455	hover_point_changed();
	456
333d5bbc	457	} else if (type == QEvent::Leave) {
cbd80f64 JH	458	_hover_point = QPoint(-1, -1);
	459	hover_point_changed();
	460	}
	461
	462	return QObject::eventFilter(object, event);
	463	}
	464
cdf7bea7	465	bool View::viewportEvent(QEvent *e)
adb4b10c JH	466	{
	467	switch(e->type()) {
	468	case QEvent::Paint:
	469	case QEvent::MouseButtonPress:
	470	case QEvent::MouseButtonRelease:
	471	case QEvent::MouseButtonDblClick:
	472	case QEvent::MouseMove:
	473	case QEvent::Wheel:
4b4f1c0d MC	474	case QEvent::TouchBegin:
	475	case QEvent::TouchUpdate:
	476	case QEvent::TouchEnd:
adb4b10c JH	477	return false;
	478
	479	default:
	480	return QAbstractScrollArea::viewportEvent(e);
	481	}
	482	}
	483
e314eca4	484	void View::resizeEvent(QResizeEvent*)
adb4b10c	485	{
d7c0ca4a	486	update_layout();
adb4b10c JH	487	}
adb4b10c JH	488
b16907d3	489	void View::h_scroll_value_changed(int value)
adb4b10c	490	{
528bd8a1 JH	491	if (_updating_scroll)
	492	return;
	493
f25770e2	494	const int range = horizontalScrollBar()->maximum();
333d5bbc	495	if (range < MaxScrollValue)
f25770e2 JH	496	_offset = _scale * value;
	497	else {
	498	double length = 0, offset;
	499	get_scroll_layout(length, offset);
	500	_offset = _scale * length * value / MaxScrollValue;
	501	}
	502
ccdd3ef5	503	_ruler->update();
84a0d458	504	_cursorheader->update();
adb4b10c JH	505	_viewport->update();
	506	}
	507
cdf7bea7	508	void View::v_scroll_value_changed(int value)
adb4b10c JH	509	{
adb4b10c JH	510	_v_offset = value;
1d8dca91	511	_header->update();
adb4b10c JH	512	_viewport->update();
	513	}
	514
69dd2b03 JH	515	void View::signals_changed()
69dd2b03 JH	516	{
ef8311a4	517	int offset = SignalMargin + SignalHeight;
01fd3263	518	const vector< shared_ptr<Trace> > traces(get_traces());
d9aecf1f	519	for (shared_ptr<Trace> t : traces) {
01fd3263	520	t->set_view(this);
01fd3263	521	t->set_v_offset(offset);
ef8311a4 JH	522	offset += SignalHeight + 2 * SignalMargin;
	523	}
	524
a6c1726e	525	update_layout();
ef8311a4	526	normalize_layout();
69dd2b03 JH	527	}
69dd2b03 JH	528
cdf7bea7	529	void View::data_updated()
adb4b10c	530	{
adb4b10c JH	531	// Update the scroll bars
	532	update_scroll();
	533
	534	// Repaint the view
	535	_viewport->update();
	536	}
cdf7bea7	537
ca4ec3ea JH	538	void View::marker_time_changed()
ca4ec3ea JH	539	{
84a0d458	540	_cursorheader->update();
ca4ec3ea JH	541	_viewport->update();
	542	}
	543
07204819	544	void View::on_signals_moved()
54401bbb	545	{
07204819 JH	546	update_scroll();
07204819 JH	547	signals_moved();
54401bbb JH	548	}
54401bbb JH	549
d7c0ca4a JH	550	void View::on_geometry_updated()
	551	{
	552	update_layout();
	553	}
	554
cdf7bea7 JH	555	} // namespace view
cdf7bea7 JH	556	} // namespace pv