[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_updated()),
		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);
}

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)
{
	const double new_scale = max(min(_scale * pow(3.0/2.0, -steps),
		MaxScale), MinScale);
	set_zoom(new_scale, 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;

	set_scale_offset(delta / w, 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;
	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
		if (sig->enabled())
			visible_data.insert(sig->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();
		left_time = min(left_time, start_time);
		right_time = max(right_time, start_time +
			d->get_max_sample_count() / d->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()));
adb4b10c JH	95	connect(&_session, SIGNAL(data_updated()),
adb4b10c JH	96	this, SLOT(data_updated()));
1d8dca91	97
58864c5c	98	connect(_cursors.first().get(), SIGNAL(time_changed()),
ca4ec3ea	99	this, SLOT(marker_time_changed()));
58864c5c	100	connect(_cursors.second().get(), SIGNAL(time_changed()),
ca4ec3ea JH	101	this, SLOT(marker_time_changed()));
ca4ec3ea JH	102
d7c0ca4a JH	103	connect(_header, SIGNAL(geometry_updated()),
d7c0ca4a JH	104	this, SLOT(on_geometry_updated()));
54401bbb	105	connect(_header, SIGNAL(signals_moved()),
07204819	106	this, SLOT(on_signals_moved()));
54401bbb	107
17348f85 JH	108	connect(_header, SIGNAL(selection_changed()),
	109	_ruler, SLOT(clear_selection()));
	110	connect(_ruler, SIGNAL(selection_changed()),
	111	_header, SLOT(clear_selection()));
	112
8b454527 JH	113	connect(_header, SIGNAL(selection_changed()),
	114	this, SIGNAL(selection_changed()));
	115	connect(_ruler, SIGNAL(selection_changed()),
	116	this, SIGNAL(selection_changed()));
	117
adb4b10c	118	setViewport(_viewport);
cbd80f64 JH	119
	120	_viewport->installEventFilter(this);
	121	_ruler->installEventFilter(this);
	122	_header->installEventFilter(this);
adb4b10c JH	123	}
adb4b10c JH	124
1d19ef83 JH	125	SigSession& View::session()
	126	{
	127	return _session;
	128	}
	129
38eeddea JH	130	const SigSession& View::session() const
	131	{
	132	return _session;
	133	}
	134
cdf7bea7	135	double View::scale() const
adb4b10c JH	136	{
	137	return _scale;
	138	}
	139
cdf7bea7	140	double View::offset() const
adb4b10c JH	141	{
	142	return _offset;
	143	}
	144
cdf7bea7	145	int View::v_offset() const
adb4b10c JH	146	{
	147	return _v_offset;
	148	}
	149
cdf7bea7	150	void View::zoom(double steps)
adb4b10c	151	{
f3f98f8f	152	zoom(steps, _viewport->width() / 2);
adb4b10c JH	153	}
adb4b10c JH	154
17c0f398 JH	155	void View::zoom(double steps, int offset)
17c0f398 JH	156	{
e31551da JH	157	const double new_scale = max(min(_scale * pow(3.0/2.0, -steps),
e31551da JH	158	MaxScale), MinScale);
d1e7d82c	159	set_zoom(new_scale, offset);
17c0f398 JH	160	}
17c0f398 JH	161
ca46b534 JH	162	void View::zoom_fit()
ca46b534 JH	163	{
1bc6525b JH	164	const pair<double, double> extents = get_time_extents();
	165	const double delta = extents.second - extents.first;
	166	if (delta < 1e-12)
ca46b534 JH	167	return;
	168
	169	assert(_viewport);
	170	const int w = _viewport->width();
	171	if (w <= 0)
	172	return;
	173
1bc6525b	174	set_scale_offset(delta / w, extents.first);
ca46b534 JH	175	}
ca46b534 JH	176
d1e7d82c JH	177	void View::zoom_one_to_one()
	178	{
	179	using pv::data::SignalData;
	180
	181	const vector< shared_ptr<Signal> > sigs(
	182	session().get_signals());
	183
	184	// Make a set of all the visible data objects
	185	set< shared_ptr<SignalData> > visible_data;
	186	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	187	if (sig->enabled())
	188	visible_data.insert(sig->data());
	189
	190	if (visible_data.empty())
	191	return;
	192
	193	double samplerate = 0.0;
	194	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) {
	195	assert(d);
	196	samplerate = max(samplerate, d->samplerate());
	197	}
	198
	199	if (samplerate == 0.0)
	200	return;
	201
	202	assert(_viewport);
	203	const int w = _viewport->width();
	204	if (w <= 0)
	205	return;
	206
	207	set_zoom(1.0 / samplerate, w / 2);
	208	}
	209
cdf7bea7	210	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	211	{
	212	_scale = scale;
	213	_offset = offset;
ccdd3ef5	214
adb4b10c	215	update_scroll();
ccdd3ef5	216	_ruler->update();
adb4b10c	217	_viewport->update();
e0fc5810	218	scale_offset_changed();
adb4b10c JH	219	}
adb4b10c JH	220
38eeddea JH	221	vector< shared_ptr<Trace> > View::get_traces() const
	222	{
	223	const vector< shared_ptr<Signal> > sigs(
	224	session().get_signals());
269528f5	225	#ifdef ENABLE_DECODE
b9329558	226	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	227	session().get_decode_signals());
	228	vector< shared_ptr<Trace> > traces(
	229	sigs.size() + decode_sigs.size());
269528f5 JH	230	#else
	231	vector< shared_ptr<Trace> > traces(sigs.size());
	232	#endif
38eeddea JH	233
	234	vector< shared_ptr<Trace> >::iterator i = traces.begin();
	235	i = copy(sigs.begin(), sigs.end(), i);
269528f5	236	#ifdef ENABLE_DECODE
38eeddea	237	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
269528f5	238	#endif
38eeddea	239
9a2bc5fc	240	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	241	return traces;
	242	}
	243
94936133 JH	244	list<weak_ptr<SelectableItem> > View::selected_items() const
	245	{
	246	list<weak_ptr<SelectableItem> > items;
	247
	248	// List the selected signals
38eeddea JH	249	const vector< shared_ptr<Trace> > traces(get_traces());
	250	BOOST_FOREACH (shared_ptr<Trace> t, traces) {
	251	assert(t);
	252	if (t->selected())
	253	items.push_back(t);
94936133 JH	254	}
	255
	256	// List the selected cursors
	257	if (_cursors.first()->selected())
	258	items.push_back(_cursors.first());
	259	if (_cursors.second()->selected())
	260	items.push_back(_cursors.second());
	261
	262	return items;
	263	}
	264
1bc6525b JH	265	set< shared_ptr<SignalData> > View::get_visible_data() const
	266	{
	267	const vector< shared_ptr<Signal> > sigs(
	268	session().get_signals());
	269
	270	// Make a set of all the visible data objects
	271	set< shared_ptr<SignalData> > visible_data;
	272	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	273	if (sig->enabled())
	274	visible_data.insert(sig->data());
	275
	276	return visible_data;
	277	}
	278
	279	pair<double, double> View::get_time_extents() const
	280	{
	281	const set< shared_ptr<SignalData> > visible_data = get_visible_data();
	282	if (visible_data.empty())
	283	return make_pair(0.0, 0.0);
	284
	285	double left_time = DBL_MAX, right_time = DBL_MIN;
	286	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
	287	{
	288	const double start_time = d->get_start_time();
	289	left_time = min(left_time, start_time);
	290	right_time = max(right_time, start_time +
	291	d->get_max_sample_count() / d->samplerate());
	292	}
	293
	294	assert(left_time < right_time);
	295	return make_pair(left_time, right_time);
	296	}
	297
f76af637 JH	298	bool View::cursors_shown() const
	299	{
	300	return _show_cursors;
	301	}
	302
	303	void View::show_cursors(bool show)
	304	{
	305	_show_cursors = show;
	306	_ruler->update();
	307	_viewport->update();
	308	}
	309
b4d91e56 JH	310	void View::centre_cursors()
	311	{
	312	const double time_width = _scale * _viewport->width();
58864c5c JH	313	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	314	_cursors.second()->set_time(_offset + time_width * 0.6);
b4d91e56 JH	315	_ruler->update();
	316	_viewport->update();
	317	}
	318
b42d25c4	319	CursorPair& View::cursors()
f76af637 JH	320	{
	321	return _cursors;
	322	}
	323
58864c5c JH	324	const CursorPair& View::cursors() const
	325	{
	326	return _cursors;
	327	}
	328
cbd80f64 JH	329	const QPoint& View::hover_point() const
	330	{
	331	return _hover_point;
	332	}
	333
4b192962 JH	334	void View::normalize_layout()
4b192962 JH	335	{
38eeddea	336	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	337
4b192962 JH	338	int v_min = INT_MAX;
38eeddea JH	339	BOOST_FOREACH(const shared_ptr<Trace> t, traces)
38eeddea JH	340	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	341
4b192962 JH	342	const int delta = -min(v_min, 0);
38eeddea JH	343	BOOST_FOREACH(shared_ptr<Trace> t, traces)
38eeddea JH	344	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	345
	346	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	347	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	348	}
	349
9cef9567 JH	350	void View::update_viewport()
	351	{
	352	assert(_viewport);
	353	_viewport->update();
	354	}
	355
f25770e2 JH	356	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	357	{
1bc6525b JH	358	const pair<double, double> extents = get_time_extents();
1bc6525b JH	359	length = (extents.second - extents.first) / _scale;
f25770e2 JH	360	offset = _offset / _scale;
	361	}
	362
d1e7d82c JH	363	void View::set_zoom(double scale, int offset)
	364	{
	365	const double cursor_offset = _offset + _scale * offset;
	366	const double new_scale = max(min(scale, MaxScale), MinScale);
	367	const double new_offset = cursor_offset - new_scale * offset;
	368	set_scale_offset(new_scale, new_offset);
	369	}
	370
cdf7bea7	371	void View::update_scroll()
adb4b10c JH	372	{
	373	assert(_viewport);
	374
	375	const QSize areaSize = _viewport->size();
	376
	377	// Set the horizontal scroll bar
	378	double length = 0, offset = 0;
f25770e2 JH	379	get_scroll_layout(length, offset);
f25770e2 JH	380	length = max(length - areaSize.width(), 0.0);
adb4b10c	381
b4ef7f2a	382	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	383
528bd8a1 JH	384	_updating_scroll = true;
528bd8a1 JH	385
333d5bbc	386	if (length < MaxScrollValue) {
f25770e2 JH	387	horizontalScrollBar()->setRange(0, length);
	388	horizontalScrollBar()->setSliderPosition(offset);
	389	} else {
	390	horizontalScrollBar()->setRange(0, MaxScrollValue);
	391	horizontalScrollBar()->setSliderPosition(
	392	_offset * MaxScrollValue / (_scale * length));
	393	}
adb4b10c	394
528bd8a1 JH	395	_updating_scroll = false;
528bd8a1 JH	396
adb4b10c JH	397	// Set the vertical scrollbar
	398	verticalScrollBar()->setPageStep(areaSize.height());
	399	verticalScrollBar()->setRange(0,
4b192962 JH	400	_viewport->get_total_height() + SignalMargin -
4b192962 JH	401	areaSize.height());
adb4b10c JH	402	}
adb4b10c JH	403
d7c0ca4a JH	404	void View::update_layout()
d7c0ca4a JH	405	{
a6c1726e JH	406	setViewportMargins(_header->sizeHint().width(),
a6c1726e JH	407	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	408	_ruler->setGeometry(_viewport->x(), 0,
	409	_viewport->width(), _viewport->y());
	410	_header->setGeometry(0, _viewport->y(),
	411	_viewport->x(), _viewport->height());
	412	update_scroll();
	413	}
	414
38eeddea JH	415	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	416	const shared_ptr<Trace> &b)
	417	{
	418	assert(a);
	419	assert(b);
	420	return a->get_v_offset() < b->get_v_offset();
	421	}
	422
cbd80f64 JH	423	bool View::eventFilter(QObject object, QEvent event)
	424	{
	425	const QEvent::Type type = event->type();
333d5bbc	426	if (type == QEvent::MouseMove) {
cbd80f64 JH	427
cbd80f64 JH	428	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	429	if (object == _viewport)
cbd80f64	430	_hover_point = mouse_event->pos();
333d5bbc	431	else if (object == _ruler)
cbd80f64	432	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	433	else if (object == _header)
cbd80f64 JH	434	_hover_point = QPoint(0, mouse_event->y());
	435	else
	436	_hover_point = QPoint(-1, -1);
	437
	438	hover_point_changed();
	439
333d5bbc	440	} else if (type == QEvent::Leave) {
cbd80f64 JH	441	_hover_point = QPoint(-1, -1);
	442	hover_point_changed();
	443	}
	444
	445	return QObject::eventFilter(object, event);
	446	}
	447
cdf7bea7	448	bool View::viewportEvent(QEvent *e)
adb4b10c JH	449	{
	450	switch(e->type()) {
	451	case QEvent::Paint:
	452	case QEvent::MouseButtonPress:
	453	case QEvent::MouseButtonRelease:
	454	case QEvent::MouseButtonDblClick:
	455	case QEvent::MouseMove:
	456	case QEvent::Wheel:
	457	return false;
	458
	459	default:
	460	return QAbstractScrollArea::viewportEvent(e);
	461	}
	462	}
	463
e314eca4	464	void View::resizeEvent(QResizeEvent*)
adb4b10c	465	{
d7c0ca4a	466	update_layout();
adb4b10c JH	467	}
adb4b10c JH	468
b16907d3	469	void View::h_scroll_value_changed(int value)
adb4b10c	470	{
528bd8a1 JH	471	if (_updating_scroll)
	472	return;
	473
f25770e2	474	const int range = horizontalScrollBar()->maximum();
333d5bbc	475	if (range < MaxScrollValue)
f25770e2 JH	476	_offset = _scale * value;
	477	else {
	478	double length = 0, offset;
	479	get_scroll_layout(length, offset);
	480	_offset = _scale * length * value / MaxScrollValue;
	481	}
	482
ccdd3ef5	483	_ruler->update();
adb4b10c JH	484	_viewport->update();
	485	}
	486
cdf7bea7	487	void View::v_scroll_value_changed(int value)
adb4b10c JH	488	{
adb4b10c JH	489	_v_offset = value;
1d8dca91	490	_header->update();
adb4b10c JH	491	_viewport->update();
	492	}
	493
69dd2b03 JH	494	void View::signals_changed()
69dd2b03 JH	495	{
ef8311a4	496	int offset = SignalMargin + SignalHeight;
01fd3263 JH	497	const vector< shared_ptr<Trace> > traces(get_traces());
	498	BOOST_FOREACH(shared_ptr<Trace> t, traces) {
	499	t->set_view(this);
01fd3263	500	t->set_v_offset(offset);
ef8311a4 JH	501	offset += SignalHeight + 2 * SignalMargin;
	502	}
	503
a6c1726e	504	update_layout();
ef8311a4	505	normalize_layout();
69dd2b03 JH	506	}
69dd2b03 JH	507
cdf7bea7	508	void View::data_updated()
adb4b10c	509	{
adb4b10c JH	510	// Update the scroll bars
	511	update_scroll();
	512
	513	// Repaint the view
	514	_viewport->update();
	515	}
cdf7bea7	516
ca4ec3ea JH	517	void View::marker_time_changed()
	518	{
	519	_ruler->update();
	520	_viewport->update();
	521	}
	522
07204819	523	void View::on_signals_moved()
54401bbb	524	{
07204819 JH	525	update_scroll();
07204819 JH	526	signals_moved();
54401bbb JH	527	}
54401bbb JH	528
d7c0ca4a JH	529	void View::on_geometry_updated()
	530	{
	531	update_layout();
	532	}
	533
cdf7bea7 JH	534	} // namespace view
cdf7bea7 JH	535	} // namespace pv