[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 namespace boost;
using namespace std;

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 JH	47
	48	using namespace boost;
	49	using namespace std;
	50
cdf7bea7 JH	51	namespace pv {
cdf7bea7 JH	52	namespace view {
adb4b10c	53
cdf7bea7 JH	54	const double View::MaxScale = 1e9;
cdf7bea7 JH	55	const double View::MinScale = 1e-15;
adb4b10c	56
f25770e2 JH	57	const int View::MaxScrollValue = INT_MAX / 2;
f25770e2 JH	58
8d44d030 JH	59	const int View::SignalHeight = 30;
8d44d030 JH	60	const int View::SignalMargin = 10;
49153683	61	const int View::SignalSnapGridSize = 10;
1d8dca91	62
f76af637 JH	63	const QColor View::CursorAreaColour(220, 231, 243);
f76af637 JH	64
2e04f9bd JH	65	const QSizeF View::LabelPadding(4, 0);
2e04f9bd JH	66
cdf7bea7	67	View::View(SigSession &session, QWidget *parent) :
adb4b10c JH	68	QAbstractScrollArea(parent),
adb4b10c JH	69	_session(session),
cdf7bea7	70	_viewport(new Viewport(*this)),
ccdd3ef5	71	_ruler(new Ruler(*this)),
1d8dca91	72	_header(new Header(*this)),
adb4b10c JH	73	_data_length(0),
	74	_scale(1e-6),
	75	_offset(0),
cbd80f64	76	_v_offset(0),
528bd8a1	77	_updating_scroll(false),
f76af637	78	_show_cursors(false),
b42d25c4	79	_cursors(*this),
cbd80f64	80	_hover_point(-1, -1)
adb4b10c	81	{
b16907d3 JH	82	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
b16907d3 JH	83	this, SLOT(h_scroll_value_changed(int)));
adb4b10c JH	84	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
adb4b10c JH	85	this, SLOT(v_scroll_value_changed(int)));
69dd2b03 JH	86
	87	connect(&_session, SIGNAL(signals_changed()),
	88	this, SLOT(signals_changed()));
adb4b10c JH	89	connect(&_session, SIGNAL(data_updated()),
adb4b10c JH	90	this, SLOT(data_updated()));
1d8dca91	91
58864c5c	92	connect(_cursors.first().get(), SIGNAL(time_changed()),
ca4ec3ea	93	this, SLOT(marker_time_changed()));
58864c5c	94	connect(_cursors.second().get(), SIGNAL(time_changed()),
ca4ec3ea JH	95	this, SLOT(marker_time_changed()));
ca4ec3ea JH	96
d7c0ca4a JH	97	connect(_header, SIGNAL(geometry_updated()),
d7c0ca4a JH	98	this, SLOT(on_geometry_updated()));
54401bbb	99	connect(_header, SIGNAL(signals_moved()),
07204819	100	this, SLOT(on_signals_moved()));
54401bbb	101
17348f85 JH	102	connect(_header, SIGNAL(selection_changed()),
	103	_ruler, SLOT(clear_selection()));
	104	connect(_ruler, SIGNAL(selection_changed()),
	105	_header, SLOT(clear_selection()));
	106
8b454527 JH	107	connect(_header, SIGNAL(selection_changed()),
	108	this, SIGNAL(selection_changed()));
	109	connect(_ruler, SIGNAL(selection_changed()),
	110	this, SIGNAL(selection_changed()));
	111
adb4b10c	112	setViewport(_viewport);
cbd80f64 JH	113
	114	_viewport->installEventFilter(this);
	115	_ruler->installEventFilter(this);
	116	_header->installEventFilter(this);
adb4b10c JH	117	}
adb4b10c JH	118
1d19ef83 JH	119	SigSession& View::session()
	120	{
	121	return _session;
	122	}
	123
38eeddea JH	124	const SigSession& View::session() const
	125	{
	126	return _session;
	127	}
	128
cdf7bea7	129	double View::scale() const
adb4b10c JH	130	{
	131	return _scale;
	132	}
	133
cdf7bea7	134	double View::offset() const
adb4b10c JH	135	{
	136	return _offset;
	137	}
	138
cdf7bea7	139	int View::v_offset() const
adb4b10c JH	140	{
	141	return _v_offset;
	142	}
	143
cdf7bea7	144	void View::zoom(double steps)
adb4b10c	145	{
f3f98f8f	146	zoom(steps, _viewport->width() / 2);
adb4b10c JH	147	}
adb4b10c JH	148
17c0f398 JH	149	void View::zoom(double steps, int offset)
17c0f398 JH	150	{
e31551da JH	151	const double new_scale = max(min(_scale * pow(3.0/2.0, -steps),
e31551da JH	152	MaxScale), MinScale);
d1e7d82c	153	set_zoom(new_scale, offset);
17c0f398 JH	154	}
17c0f398 JH	155
ca46b534 JH	156	void View::zoom_fit()
	157	{
	158	using pv::data::SignalData;
	159
	160	const vector< shared_ptr<Signal> > sigs(
	161	session().get_signals());
	162
	163	// Make a set of all the visible data objects
	164	set< shared_ptr<SignalData> > visible_data;
	165	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	166	if (sig->enabled())
	167	visible_data.insert(sig->data());
	168
	169	if (visible_data.empty())
	170	return;
	171
	172	double left_time = DBL_MAX, right_time = DBL_MIN;
	173	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
	174	{
	175	const double start_time = d->get_start_time();
	176	left_time = min(left_time, start_time);
	177	right_time = max(right_time, start_time +
9d28da5a	178	d->get_max_sample_count() / d->samplerate());
ca46b534 JH	179	}
	180
	181	assert(left_time < right_time);
	182	if (right_time - left_time < 1e-12)
	183	return;
	184
	185	assert(_viewport);
	186	const int w = _viewport->width();
	187	if (w <= 0)
	188	return;
	189
	190	set_scale_offset((right_time - left_time) / w, left_time);
	191	}
	192
d1e7d82c JH	193	void View::zoom_one_to_one()
	194	{
	195	using pv::data::SignalData;
	196
	197	const vector< shared_ptr<Signal> > sigs(
	198	session().get_signals());
	199
	200	// Make a set of all the visible data objects
	201	set< shared_ptr<SignalData> > visible_data;
	202	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	203	if (sig->enabled())
	204	visible_data.insert(sig->data());
	205
	206	if (visible_data.empty())
	207	return;
	208
	209	double samplerate = 0.0;
	210	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) {
	211	assert(d);
	212	samplerate = max(samplerate, d->samplerate());
	213	}
	214
	215	if (samplerate == 0.0)
	216	return;
	217
	218	assert(_viewport);
	219	const int w = _viewport->width();
	220	if (w <= 0)
	221	return;
	222
	223	set_zoom(1.0 / samplerate, w / 2);
	224	}
	225
cdf7bea7	226	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	227	{
	228	_scale = scale;
	229	_offset = offset;
ccdd3ef5	230
adb4b10c	231	update_scroll();
ccdd3ef5	232	_ruler->update();
adb4b10c	233	_viewport->update();
e0fc5810	234	scale_offset_changed();
adb4b10c JH	235	}
adb4b10c JH	236
38eeddea JH	237	vector< shared_ptr<Trace> > View::get_traces() const
	238	{
	239	const vector< shared_ptr<Signal> > sigs(
	240	session().get_signals());
269528f5	241	#ifdef ENABLE_DECODE
b9329558	242	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	243	session().get_decode_signals());
	244	vector< shared_ptr<Trace> > traces(
	245	sigs.size() + decode_sigs.size());
269528f5 JH	246	#else
	247	vector< shared_ptr<Trace> > traces(sigs.size());
	248	#endif
38eeddea JH	249
	250	vector< shared_ptr<Trace> >::iterator i = traces.begin();
	251	i = copy(sigs.begin(), sigs.end(), i);
269528f5	252	#ifdef ENABLE_DECODE
38eeddea	253	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
269528f5	254	#endif
38eeddea	255
9a2bc5fc	256	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	257	return traces;
	258	}
	259
94936133 JH	260	list<weak_ptr<SelectableItem> > View::selected_items() const
	261	{
	262	list<weak_ptr<SelectableItem> > items;
	263
	264	// List the selected signals
38eeddea JH	265	const vector< shared_ptr<Trace> > traces(get_traces());
	266	BOOST_FOREACH (shared_ptr<Trace> t, traces) {
	267	assert(t);
	268	if (t->selected())
	269	items.push_back(t);
94936133 JH	270	}
	271
	272	// List the selected cursors
	273	if (_cursors.first()->selected())
	274	items.push_back(_cursors.first());
	275	if (_cursors.second()->selected())
	276	items.push_back(_cursors.second());
	277
	278	return items;
	279	}
	280
f76af637 JH	281	bool View::cursors_shown() const
	282	{
	283	return _show_cursors;
	284	}
	285
	286	void View::show_cursors(bool show)
	287	{
	288	_show_cursors = show;
	289	_ruler->update();
	290	_viewport->update();
	291	}
	292
b4d91e56 JH	293	void View::centre_cursors()
	294	{
	295	const double time_width = _scale * _viewport->width();
58864c5c JH	296	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	297	_cursors.second()->set_time(_offset + time_width * 0.6);
b4d91e56 JH	298	_ruler->update();
	299	_viewport->update();
	300	}
	301
b42d25c4	302	CursorPair& View::cursors()
f76af637 JH	303	{
	304	return _cursors;
	305	}
	306
58864c5c JH	307	const CursorPair& View::cursors() const
	308	{
	309	return _cursors;
	310	}
	311
cbd80f64 JH	312	const QPoint& View::hover_point() const
	313	{
	314	return _hover_point;
	315	}
	316
4b192962 JH	317	void View::normalize_layout()
4b192962 JH	318	{
38eeddea	319	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	320
4b192962 JH	321	int v_min = INT_MAX;
38eeddea JH	322	BOOST_FOREACH(const shared_ptr<Trace> t, traces)
38eeddea JH	323	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	324
4b192962 JH	325	const int delta = -min(v_min, 0);
38eeddea JH	326	BOOST_FOREACH(shared_ptr<Trace> t, traces)
38eeddea JH	327	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	328
	329	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	330	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	331	}
	332
9cef9567 JH	333	void View::update_viewport()
	334	{
	335	assert(_viewport);
	336	_viewport->update();
	337	}
	338
f25770e2 JH	339	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	340	{
1b1ec774	341	const shared_ptr<data::SignalData> sig_data = _session.get_data();
333d5bbc	342	if (!sig_data)
f25770e2 JH	343	return;
f25770e2 JH	344
9d28da5a	345	length = _data_length / (sig_data->samplerate() * _scale);
f25770e2 JH	346	offset = _offset / _scale;
	347	}
	348
d1e7d82c JH	349	void View::set_zoom(double scale, int offset)
	350	{
	351	const double cursor_offset = _offset + _scale * offset;
	352	const double new_scale = max(min(scale, MaxScale), MinScale);
	353	const double new_offset = cursor_offset - new_scale * offset;
	354	set_scale_offset(new_scale, new_offset);
	355	}
	356
cdf7bea7	357	void View::update_scroll()
adb4b10c JH	358	{
	359	assert(_viewport);
	360
	361	const QSize areaSize = _viewport->size();
	362
	363	// Set the horizontal scroll bar
	364	double length = 0, offset = 0;
f25770e2 JH	365	get_scroll_layout(length, offset);
f25770e2 JH	366	length = max(length - areaSize.width(), 0.0);
adb4b10c	367
b4ef7f2a	368	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	369
528bd8a1 JH	370	_updating_scroll = true;
528bd8a1 JH	371
333d5bbc	372	if (length < MaxScrollValue) {
f25770e2 JH	373	horizontalScrollBar()->setRange(0, length);
	374	horizontalScrollBar()->setSliderPosition(offset);
	375	} else {
	376	horizontalScrollBar()->setRange(0, MaxScrollValue);
	377	horizontalScrollBar()->setSliderPosition(
	378	_offset * MaxScrollValue / (_scale * length));
	379	}
adb4b10c	380
528bd8a1 JH	381	_updating_scroll = false;
528bd8a1 JH	382
adb4b10c JH	383	// Set the vertical scrollbar
	384	verticalScrollBar()->setPageStep(areaSize.height());
	385	verticalScrollBar()->setRange(0,
4b192962 JH	386	_viewport->get_total_height() + SignalMargin -
4b192962 JH	387	areaSize.height());
adb4b10c JH	388	}
adb4b10c JH	389
d7c0ca4a JH	390	void View::update_layout()
d7c0ca4a JH	391	{
a6c1726e JH	392	setViewportMargins(_header->sizeHint().width(),
a6c1726e JH	393	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	394	_ruler->setGeometry(_viewport->x(), 0,
	395	_viewport->width(), _viewport->y());
	396	_header->setGeometry(0, _viewport->y(),
	397	_viewport->x(), _viewport->height());
	398	update_scroll();
	399	}
	400
38eeddea JH	401	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	402	const shared_ptr<Trace> &b)
	403	{
	404	assert(a);
	405	assert(b);
	406	return a->get_v_offset() < b->get_v_offset();
	407	}
	408
cbd80f64 JH	409	bool View::eventFilter(QObject object, QEvent event)
	410	{
	411	const QEvent::Type type = event->type();
333d5bbc	412	if (type == QEvent::MouseMove) {
cbd80f64 JH	413
cbd80f64 JH	414	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	415	if (object == _viewport)
cbd80f64	416	_hover_point = mouse_event->pos();
333d5bbc	417	else if (object == _ruler)
cbd80f64	418	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	419	else if (object == _header)
cbd80f64 JH	420	_hover_point = QPoint(0, mouse_event->y());
	421	else
	422	_hover_point = QPoint(-1, -1);
	423
	424	hover_point_changed();
	425
333d5bbc	426	} else if (type == QEvent::Leave) {
cbd80f64 JH	427	_hover_point = QPoint(-1, -1);
	428	hover_point_changed();
	429	}
	430
	431	return QObject::eventFilter(object, event);
	432	}
	433
cdf7bea7	434	bool View::viewportEvent(QEvent *e)
adb4b10c JH	435	{
	436	switch(e->type()) {
	437	case QEvent::Paint:
	438	case QEvent::MouseButtonPress:
	439	case QEvent::MouseButtonRelease:
	440	case QEvent::MouseButtonDblClick:
	441	case QEvent::MouseMove:
	442	case QEvent::Wheel:
	443	return false;
	444
	445	default:
	446	return QAbstractScrollArea::viewportEvent(e);
	447	}
	448	}
	449
e314eca4	450	void View::resizeEvent(QResizeEvent*)
adb4b10c	451	{
d7c0ca4a	452	update_layout();
adb4b10c JH	453	}
adb4b10c JH	454
b16907d3	455	void View::h_scroll_value_changed(int value)
adb4b10c	456	{
528bd8a1 JH	457	if (_updating_scroll)
	458	return;
	459
f25770e2	460	const int range = horizontalScrollBar()->maximum();
333d5bbc	461	if (range < MaxScrollValue)
f25770e2 JH	462	_offset = _scale * value;
	463	else {
	464	double length = 0, offset;
	465	get_scroll_layout(length, offset);
	466	_offset = _scale * length * value / MaxScrollValue;
	467	}
	468
ccdd3ef5	469	_ruler->update();
adb4b10c JH	470	_viewport->update();
	471	}
	472
cdf7bea7	473	void View::v_scroll_value_changed(int value)
adb4b10c JH	474	{
adb4b10c JH	475	_v_offset = value;
1d8dca91	476	_header->update();
adb4b10c JH	477	_viewport->update();
	478	}
	479
69dd2b03 JH	480	void View::signals_changed()
69dd2b03 JH	481	{
ef8311a4	482	int offset = SignalMargin + SignalHeight;
01fd3263 JH	483	const vector< shared_ptr<Trace> > traces(get_traces());
	484	BOOST_FOREACH(shared_ptr<Trace> t, traces) {
	485	t->set_view(this);
01fd3263	486	t->set_v_offset(offset);
ef8311a4 JH	487	offset += SignalHeight + 2 * SignalMargin;
	488	}
	489
a6c1726e	490	update_layout();
ef8311a4	491	normalize_layout();
69dd2b03 JH	492	}
69dd2b03 JH	493
cdf7bea7	494	void View::data_updated()
adb4b10c JH	495	{
	496	// Get the new data length
	497	_data_length = 0;
1b1ec774	498	shared_ptr<data::Logic> sig_data = _session.get_data();
333d5bbc	499	if (sig_data) {
1b1ec774	500	deque< shared_ptr<data::LogicSnapshot> > &snapshots =
adb4b10c	501	sig_data->get_snapshots();
1b1ec774	502	BOOST_FOREACH(shared_ptr<data::LogicSnapshot> s, snapshots)
333d5bbc	503	if (s)
adb4b10c JH	504	_data_length = max(_data_length,
	505	s->get_sample_count());
	506	}
	507
	508	// Update the scroll bars
	509	update_scroll();
	510
	511	// Repaint the view
	512	_viewport->update();
	513	}
cdf7bea7	514
ca4ec3ea JH	515	void View::marker_time_changed()
	516	{
	517	_ruler->update();
	518	_viewport->update();
	519	}
	520
07204819	521	void View::on_signals_moved()
54401bbb	522	{
07204819 JH	523	update_scroll();
07204819 JH	524	signals_moved();
54401bbb JH	525	}
54401bbb JH	526
d7c0ca4a JH	527	void View::on_geometry_updated()
	528	{
	529	update_layout();
	530	}
	531
cdf7bea7 JH	532	} // namespace view
cdf7bea7 JH	533	} // namespace pv