[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 <boost/foreach.hpp>

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

#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 boost::shared_ptr;
using boost::weak_ptr;
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::vector;

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)),
	_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(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()),
		_ruler, SLOT(clear_selection()));
	connect(_ruler, SIGNAL(selection_changed()),
		_header, SLOT(clear_selection()));

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

	setViewport(_viewport);

	_viewport->installEventFilter(this);
	_ruler->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();
}

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;
	BOOST_FOREACH(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();
	_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

	vector< shared_ptr<Trace> >::iterator 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());
	BOOST_FOREACH (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;
	BOOST_FOREACH(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;
	BOOST_FOREACH(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;
	_ruler->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);
	_ruler->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;
	BOOST_FOREACH(const shared_ptr<Trace> t, traces)
		v_min = min(t->get_v_offset(), v_min);

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