[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 <set>

#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 std::deque;
using std::list;
using std::max;
using std::min;
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)),
	_data_length(0),
	_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()
{
	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 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);
	if (right_time - left_time < 1e-12)
		return;

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

	set_scale_offset((right_time - left_time) / w, left_time);	
}

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;
}

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 shared_ptr<data::SignalData> sig_data = _session.get_data();
	if (!sig_data)
		return;

	length = _data_length / (sig_data->samplerate() * _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()
{
	// Get the new data length
	_data_length = 0;
	shared_ptr<data::Logic> sig_data = _session.get_data();
	if (sig_data) {
		deque< shared_ptr<data::LogicSnapshot> > &snapshots =
			sig_data->get_snapshots();
		BOOST_FOREACH(shared_ptr<data::LogicSnapshot> s, snapshots)
			if (s)
				_data_length = max(_data_length,
					s->get_sample_count());
	}

	// 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>
adb4b10c JH	28
ca46b534 JH	29	#include <set>
ca46b534 JH	30
adb4b10c JH	31	#include <boost/foreach.hpp>
	32
	33	#include <QEvent>
cbd80f64	34	#include <QMouseEvent>
adb4b10c JH	35	#include <QScrollBar>
adb4b10c JH	36
b9329558	37	#include "decodetrace.h"
1d8dca91	38	#include "header.h"
ccdd3ef5	39	#include "ruler.h"
2e575351	40	#include "signal.h"
cdf7bea7 JH	41	#include "view.h"
cdf7bea7 JH	42	#include "viewport.h"
adb4b10c	43
1b1ec774 JH	44	#include "pv/sigsession.h"
	45	#include "pv/data/logic.h"
	46	#include "pv/data/logicsnapshot.h"
adb4b10c	47
819f4c25 JH	48	using boost::shared_ptr;
	49	using boost::weak_ptr;
	50	using std::deque;
	51	using std::list;
	52	using std::max;
	53	using std::min;
	54	using std::set;
	55	using std::vector;
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)),
1d8dca91	78	_header(new Header(*this)),
adb4b10c JH	79	_data_length(0),
	80	_scale(1e-6),
	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()
	163	{
	164	using pv::data::SignalData;
	165
	166	const vector< shared_ptr<Signal> > sigs(
	167	session().get_signals());
	168
	169	// Make a set of all the visible data objects
	170	set< shared_ptr<SignalData> > visible_data;
	171	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	172	if (sig->enabled())
	173	visible_data.insert(sig->data());
	174
	175	if (visible_data.empty())
	176	return;
	177
	178	double left_time = DBL_MAX, right_time = DBL_MIN;
	179	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
	180	{
	181	const double start_time = d->get_start_time();
	182	left_time = min(left_time, start_time);
	183	right_time = max(right_time, start_time +
9d28da5a	184	d->get_max_sample_count() / d->samplerate());
ca46b534 JH	185	}
	186
	187	assert(left_time < right_time);
	188	if (right_time - left_time < 1e-12)
	189	return;
	190
	191	assert(_viewport);
	192	const int w = _viewport->width();
	193	if (w <= 0)
	194	return;
	195
	196	set_scale_offset((right_time - left_time) / w, left_time);
	197	}
	198
d1e7d82c JH	199	void View::zoom_one_to_one()
	200	{
	201	using pv::data::SignalData;
	202
	203	const vector< shared_ptr<Signal> > sigs(
	204	session().get_signals());
	205
	206	// Make a set of all the visible data objects
	207	set< shared_ptr<SignalData> > visible_data;
	208	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	209	if (sig->enabled())
	210	visible_data.insert(sig->data());
	211
	212	if (visible_data.empty())
	213	return;
	214
	215	double samplerate = 0.0;
	216	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) {
	217	assert(d);
	218	samplerate = max(samplerate, d->samplerate());
	219	}
	220
	221	if (samplerate == 0.0)
	222	return;
	223
	224	assert(_viewport);
	225	const int w = _viewport->width();
	226	if (w <= 0)
	227	return;
	228
	229	set_zoom(1.0 / samplerate, w / 2);
	230	}
	231
cdf7bea7	232	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	233	{
	234	_scale = scale;
	235	_offset = offset;
ccdd3ef5	236
adb4b10c	237	update_scroll();
ccdd3ef5	238	_ruler->update();
adb4b10c	239	_viewport->update();
e0fc5810	240	scale_offset_changed();
adb4b10c JH	241	}
adb4b10c JH	242
38eeddea JH	243	vector< shared_ptr<Trace> > View::get_traces() const
	244	{
	245	const vector< shared_ptr<Signal> > sigs(
	246	session().get_signals());
269528f5	247	#ifdef ENABLE_DECODE
b9329558	248	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	249	session().get_decode_signals());
	250	vector< shared_ptr<Trace> > traces(
	251	sigs.size() + decode_sigs.size());
269528f5 JH	252	#else
	253	vector< shared_ptr<Trace> > traces(sigs.size());
	254	#endif
38eeddea JH	255
	256	vector< shared_ptr<Trace> >::iterator i = traces.begin();
	257	i = copy(sigs.begin(), sigs.end(), i);
269528f5	258	#ifdef ENABLE_DECODE
38eeddea	259	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
269528f5	260	#endif
38eeddea	261
9a2bc5fc	262	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	263	return traces;
	264	}
	265
94936133 JH	266	list<weak_ptr<SelectableItem> > View::selected_items() const
	267	{
	268	list<weak_ptr<SelectableItem> > items;
	269
	270	// List the selected signals
38eeddea JH	271	const vector< shared_ptr<Trace> > traces(get_traces());
	272	BOOST_FOREACH (shared_ptr<Trace> t, traces) {
	273	assert(t);
	274	if (t->selected())
	275	items.push_back(t);
94936133 JH	276	}
	277
	278	// List the selected cursors
	279	if (_cursors.first()->selected())
	280	items.push_back(_cursors.first());
	281	if (_cursors.second()->selected())
	282	items.push_back(_cursors.second());
	283
	284	return items;
	285	}
	286
f76af637 JH	287	bool View::cursors_shown() const
	288	{
	289	return _show_cursors;
	290	}
	291
	292	void View::show_cursors(bool show)
	293	{
	294	_show_cursors = show;
	295	_ruler->update();
	296	_viewport->update();
	297	}
	298
b4d91e56 JH	299	void View::centre_cursors()
	300	{
	301	const double time_width = _scale * _viewport->width();
58864c5c JH	302	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	303	_cursors.second()->set_time(_offset + time_width * 0.6);
b4d91e56 JH	304	_ruler->update();
	305	_viewport->update();
	306	}
	307
b42d25c4	308	CursorPair& View::cursors()
f76af637 JH	309	{
	310	return _cursors;
	311	}
	312
58864c5c JH	313	const CursorPair& View::cursors() const
	314	{
	315	return _cursors;
	316	}
	317
cbd80f64 JH	318	const QPoint& View::hover_point() const
	319	{
	320	return _hover_point;
	321	}
	322
4b192962 JH	323	void View::normalize_layout()
4b192962 JH	324	{
38eeddea	325	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	326
4b192962 JH	327	int v_min = INT_MAX;
38eeddea JH	328	BOOST_FOREACH(const shared_ptr<Trace> t, traces)
38eeddea JH	329	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	330
4b192962 JH	331	const int delta = -min(v_min, 0);
38eeddea JH	332	BOOST_FOREACH(shared_ptr<Trace> t, traces)
38eeddea JH	333	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	334
	335	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	336	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	337	}
	338
9cef9567 JH	339	void View::update_viewport()
	340	{
	341	assert(_viewport);
	342	_viewport->update();
	343	}
	344
f25770e2 JH	345	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	346	{
1b1ec774	347	const shared_ptr<data::SignalData> sig_data = _session.get_data();
333d5bbc	348	if (!sig_data)
f25770e2 JH	349	return;
f25770e2 JH	350
9d28da5a	351	length = _data_length / (sig_data->samplerate() * _scale);
f25770e2 JH	352	offset = _offset / _scale;
	353	}
	354
d1e7d82c JH	355	void View::set_zoom(double scale, int offset)
	356	{
	357	const double cursor_offset = _offset + _scale * offset;
	358	const double new_scale = max(min(scale, MaxScale), MinScale);
	359	const double new_offset = cursor_offset - new_scale * offset;
	360	set_scale_offset(new_scale, new_offset);
	361	}
	362
cdf7bea7	363	void View::update_scroll()
adb4b10c JH	364	{
	365	assert(_viewport);
	366
	367	const QSize areaSize = _viewport->size();
	368
	369	// Set the horizontal scroll bar
	370	double length = 0, offset = 0;
f25770e2 JH	371	get_scroll_layout(length, offset);
f25770e2 JH	372	length = max(length - areaSize.width(), 0.0);
adb4b10c	373
b4ef7f2a	374	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	375
528bd8a1 JH	376	_updating_scroll = true;
528bd8a1 JH	377
333d5bbc	378	if (length < MaxScrollValue) {
f25770e2 JH	379	horizontalScrollBar()->setRange(0, length);
	380	horizontalScrollBar()->setSliderPosition(offset);
	381	} else {
	382	horizontalScrollBar()->setRange(0, MaxScrollValue);
	383	horizontalScrollBar()->setSliderPosition(
	384	_offset * MaxScrollValue / (_scale * length));
	385	}
adb4b10c	386
528bd8a1 JH	387	_updating_scroll = false;
528bd8a1 JH	388
adb4b10c JH	389	// Set the vertical scrollbar
	390	verticalScrollBar()->setPageStep(areaSize.height());
	391	verticalScrollBar()->setRange(0,
4b192962 JH	392	_viewport->get_total_height() + SignalMargin -
4b192962 JH	393	areaSize.height());
adb4b10c JH	394	}
adb4b10c JH	395
d7c0ca4a JH	396	void View::update_layout()
d7c0ca4a JH	397	{
a6c1726e JH	398	setViewportMargins(_header->sizeHint().width(),
a6c1726e JH	399	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	400	_ruler->setGeometry(_viewport->x(), 0,
	401	_viewport->width(), _viewport->y());
	402	_header->setGeometry(0, _viewport->y(),
	403	_viewport->x(), _viewport->height());
	404	update_scroll();
	405	}
	406
38eeddea JH	407	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	408	const shared_ptr<Trace> &b)
	409	{
	410	assert(a);
	411	assert(b);
	412	return a->get_v_offset() < b->get_v_offset();
	413	}
	414
cbd80f64 JH	415	bool View::eventFilter(QObject object, QEvent event)
	416	{
	417	const QEvent::Type type = event->type();
333d5bbc	418	if (type == QEvent::MouseMove) {
cbd80f64 JH	419
cbd80f64 JH	420	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	421	if (object == _viewport)
cbd80f64	422	_hover_point = mouse_event->pos();
333d5bbc	423	else if (object == _ruler)
cbd80f64	424	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	425	else if (object == _header)
cbd80f64 JH	426	_hover_point = QPoint(0, mouse_event->y());
	427	else
	428	_hover_point = QPoint(-1, -1);
	429
	430	hover_point_changed();
	431
333d5bbc	432	} else if (type == QEvent::Leave) {
cbd80f64 JH	433	_hover_point = QPoint(-1, -1);
	434	hover_point_changed();
	435	}
	436
	437	return QObject::eventFilter(object, event);
	438	}
	439
cdf7bea7	440	bool View::viewportEvent(QEvent *e)
adb4b10c JH	441	{
	442	switch(e->type()) {
	443	case QEvent::Paint:
	444	case QEvent::MouseButtonPress:
	445	case QEvent::MouseButtonRelease:
	446	case QEvent::MouseButtonDblClick:
	447	case QEvent::MouseMove:
	448	case QEvent::Wheel:
	449	return false;
	450
	451	default:
	452	return QAbstractScrollArea::viewportEvent(e);
	453	}
	454	}
	455
e314eca4	456	void View::resizeEvent(QResizeEvent*)
adb4b10c	457	{
d7c0ca4a	458	update_layout();
adb4b10c JH	459	}
adb4b10c JH	460
b16907d3	461	void View::h_scroll_value_changed(int value)
adb4b10c	462	{
528bd8a1 JH	463	if (_updating_scroll)
	464	return;
	465
f25770e2	466	const int range = horizontalScrollBar()->maximum();
333d5bbc	467	if (range < MaxScrollValue)
f25770e2 JH	468	_offset = _scale * value;
	469	else {
	470	double length = 0, offset;
	471	get_scroll_layout(length, offset);
	472	_offset = _scale * length * value / MaxScrollValue;
	473	}
	474
ccdd3ef5	475	_ruler->update();
adb4b10c JH	476	_viewport->update();
	477	}
	478
cdf7bea7	479	void View::v_scroll_value_changed(int value)
adb4b10c JH	480	{
adb4b10c JH	481	_v_offset = value;
1d8dca91	482	_header->update();
adb4b10c JH	483	_viewport->update();
	484	}
	485
69dd2b03 JH	486	void View::signals_changed()
69dd2b03 JH	487	{
ef8311a4	488	int offset = SignalMargin + SignalHeight;
01fd3263 JH	489	const vector< shared_ptr<Trace> > traces(get_traces());
	490	BOOST_FOREACH(shared_ptr<Trace> t, traces) {
	491	t->set_view(this);
01fd3263	492	t->set_v_offset(offset);
ef8311a4 JH	493	offset += SignalHeight + 2 * SignalMargin;
	494	}
	495
a6c1726e	496	update_layout();
ef8311a4	497	normalize_layout();
69dd2b03 JH	498	}
69dd2b03 JH	499
cdf7bea7	500	void View::data_updated()
adb4b10c JH	501	{
	502	// Get the new data length
	503	_data_length = 0;
1b1ec774	504	shared_ptr<data::Logic> sig_data = _session.get_data();
333d5bbc	505	if (sig_data) {
1b1ec774	506	deque< shared_ptr<data::LogicSnapshot> > &snapshots =
adb4b10c	507	sig_data->get_snapshots();
1b1ec774	508	BOOST_FOREACH(shared_ptr<data::LogicSnapshot> s, snapshots)
333d5bbc	509	if (s)
adb4b10c JH	510	_data_length = max(_data_length,
	511	s->get_sample_count());
	512	}
	513
	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