[pulseview.git] / pv / view / view.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

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

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

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

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

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

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

namespace pv {
namespace view {

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

const int View::MaxScrollValue = INT_MAX / 2;

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

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

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

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

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

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

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

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

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

	setViewport(_viewport);

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

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

	// make sure the cursorheader is over the ruler
	_cursorheader->raise();
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (samplerate == 0.0)
		return;

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

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

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

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

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

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

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

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

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

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

	return items;
}

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

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

	return visible_data;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	const QSize areaSize = _viewport->size();

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

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

	_updating_scroll = true;

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

	_updating_scroll = false;

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

void View::update_layout()
{
	setViewportMargins(_header->sizeHint().width(),
		_ruler->sizeHint().height(), 0, 0);
	_ruler->setGeometry(_viewport->x(), 0,
		_viewport->width(), _viewport->y());
	_cursorheader->setGeometry(
		_viewport->x(),
		_ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2,
		_viewport->width(), _cursorheader->sizeHint().height());
	_header->setGeometry(0, _viewport->y(),
		_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 || object == _cursorheader)
			_hover_point = QPoint(mouse_event->x(), 0);
		else if (object == _header)
			_hover_point = QPoint(0, mouse_event->y());
		else
			_hover_point = QPoint(-1, -1);

		hover_point_changed();

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

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

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

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

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

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

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

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

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

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

	update_layout();
	normalize_layout();
}

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

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

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

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

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

} // namespace view
} // namespace pv
Commit	Line	Data
adb4b10c	1	/*
b3f22de0	2	* This file is part of the PulseView project.
adb4b10c JH	3	*
	4	* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
269528f5	21	#ifdef ENABLE_DECODE
4e5a4405	22	#include <libsigrokdecode/libsigrokdecode.h>
269528f5	23	#endif
4e5a4405	24
adb4b10c	25	#include <assert.h>
f25770e2	26	#include <limits.h>
adb4b10c JH	27	#include <math.h>
adb4b10c JH	28
adb4b10c	29	#include <QEvent>
cbd80f64	30	#include <QMouseEvent>
adb4b10c JH	31	#include <QScrollBar>
adb4b10c JH	32
84a0d458	33	#include "cursorheader.h"
b9329558	34	#include "decodetrace.h"
1d8dca91	35	#include "header.h"
ccdd3ef5	36	#include "ruler.h"
2e575351	37	#include "signal.h"
cdf7bea7 JH	38	#include "view.h"
cdf7bea7 JH	39	#include "viewport.h"
adb4b10c	40
1b1ec774 JH	41	#include "pv/sigsession.h"
	42	#include "pv/data/logic.h"
	43	#include "pv/data/logicsnapshot.h"
adb4b10c	44
1bc6525b	45	using pv::data::SignalData;
819f4c25 JH	46	using std::deque;
	47	using std::list;
	48	using std::max;
1bc6525b	49	using std::make_pair;
819f4c25	50	using std::min;
1bc6525b	51	using std::pair;
819f4c25	52	using std::set;
f9abf97e	53	using std::shared_ptr;
819f4c25	54	using std::vector;
f9abf97e	55	using std::weak_ptr;
adb4b10c	56
cdf7bea7 JH	57	namespace pv {
cdf7bea7 JH	58	namespace view {
adb4b10c	59
cdf7bea7 JH	60	const double View::MaxScale = 1e9;
cdf7bea7 JH	61	const double View::MinScale = 1e-15;
adb4b10c	62
f25770e2 JH	63	const int View::MaxScrollValue = INT_MAX / 2;
f25770e2 JH	64
8d44d030 JH	65	const int View::SignalHeight = 30;
8d44d030 JH	66	const int View::SignalMargin = 10;
49153683	67	const int View::SignalSnapGridSize = 10;
1d8dca91	68
f76af637 JH	69	const QColor View::CursorAreaColour(220, 231, 243);
f76af637 JH	70
2e04f9bd JH	71	const QSizeF View::LabelPadding(4, 0);
2e04f9bd JH	72
cdf7bea7	73	View::View(SigSession &session, QWidget *parent) :
adb4b10c JH	74	QAbstractScrollArea(parent),
adb4b10c JH	75	_session(session),
cdf7bea7	76	_viewport(new Viewport(*this)),
ccdd3ef5	77	_ruler(new Ruler(*this)),
84a0d458	78	_cursorheader(new CursorHeader(*this)),
1d8dca91	79	_header(new Header(*this)),
adb4b10c JH	80	_scale(1e-6),
adb4b10c JH	81	_offset(0),
cbd80f64	82	_v_offset(0),
528bd8a1	83	_updating_scroll(false),
f76af637	84	_show_cursors(false),
b42d25c4	85	_cursors(*this),
cbd80f64	86	_hover_point(-1, -1)
adb4b10c	87	{
b16907d3 JH	88	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
b16907d3 JH	89	this, SLOT(h_scroll_value_changed(int)));
adb4b10c JH	90	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
adb4b10c JH	91	this, SLOT(v_scroll_value_changed(int)));
69dd2b03 JH	92
	93	connect(&_session, SIGNAL(signals_changed()),
	94	this, SLOT(signals_changed()));
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	110	connect(_header, SIGNAL(selection_changed()),
84a0d458 JS	111	_cursorheader, SLOT(clear_selection()));
84a0d458 JS	112	connect(_cursorheader, SIGNAL(selection_changed()),
17348f85 JH	113	_header, SLOT(clear_selection()));
17348f85 JH	114
8b454527 JH	115	connect(_header, SIGNAL(selection_changed()),
8b454527 JH	116	this, SIGNAL(selection_changed()));
84a0d458	117	connect(_cursorheader, SIGNAL(selection_changed()),
8b454527 JH	118	this, SIGNAL(selection_changed()));
8b454527 JH	119
adb4b10c	120	setViewport(_viewport);
cbd80f64 JH	121
	122	_viewport->installEventFilter(this);
	123	_ruler->installEventFilter(this);
84a0d458	124	_cursorheader->installEventFilter(this);
cbd80f64	125	_header->installEventFilter(this);
d873f4d6	126
9f46d905 JH	127	// Trigger the initial event manually. The default device has signals
9f46d905 JH	128	// which were created before this object came into being
d873f4d6	129	signals_changed();
84a0d458 JS	130
	131	// make sure the cursorheader is over the ruler
	132	_cursorheader->raise();
adb4b10c JH	133	}
adb4b10c JH	134
1d19ef83 JH	135	SigSession& View::session()
	136	{
	137	return _session;
	138	}
	139
38eeddea JH	140	const SigSession& View::session() const
	141	{
	142	return _session;
	143	}
	144
cdf7bea7	145	double View::scale() const
adb4b10c JH	146	{
	147	return _scale;
	148	}
	149
cdf7bea7	150	double View::offset() const
adb4b10c JH	151	{
	152	return _offset;
	153	}
	154
cdf7bea7	155	int View::v_offset() const
adb4b10c JH	156	{
	157	return _v_offset;
	158	}
	159
cdf7bea7	160	void View::zoom(double steps)
adb4b10c	161	{
f3f98f8f	162	zoom(steps, _viewport->width() / 2);
adb4b10c JH	163	}
adb4b10c JH	164
17c0f398 JH	165	void View::zoom(double steps, int offset)
17c0f398 JH	166	{
8b2e2a9a	167	set_zoom(_scale * pow(3.0/2.0, -steps), offset);
17c0f398 JH	168	}
17c0f398 JH	169
ca46b534 JH	170	void View::zoom_fit()
ca46b534 JH	171	{
1bc6525b JH	172	const pair<double, double> extents = get_time_extents();
	173	const double delta = extents.second - extents.first;
	174	if (delta < 1e-12)
ca46b534 JH	175	return;
	176
	177	assert(_viewport);
	178	const int w = _viewport->width();
	179	if (w <= 0)
	180	return;
	181
78311127 JH	182	const double scale = max(min(delta / w, MaxScale), MinScale);
78311127 JH	183	set_scale_offset(scale, extents.first);
ca46b534 JH	184	}
ca46b534 JH	185
d1e7d82c JH	186	void View::zoom_one_to_one()
	187	{
	188	using pv::data::SignalData;
	189
	190	const vector< shared_ptr<Signal> > sigs(
	191	session().get_signals());
	192
	193	// Make a set of all the visible data objects
0fc664a9	194	set< shared_ptr<SignalData> > visible_data = get_visible_data();
d1e7d82c JH	195	if (visible_data.empty())
	196	return;
	197
	198	double samplerate = 0.0;
d9aecf1f	199	for (const shared_ptr<SignalData> d : visible_data) {
d1e7d82c JH	200	assert(d);
	201	samplerate = max(samplerate, d->samplerate());
	202	}
	203
	204	if (samplerate == 0.0)
	205	return;
	206
	207	assert(_viewport);
	208	const int w = _viewport->width();
	209	if (w <= 0)
	210	return;
	211
	212	set_zoom(1.0 / samplerate, w / 2);
	213	}
	214
cdf7bea7	215	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	216	{
	217	_scale = scale;
	218	_offset = offset;
ccdd3ef5	219
adb4b10c	220	update_scroll();
ccdd3ef5	221	_ruler->update();
84a0d458	222	_cursorheader->update();
adb4b10c	223	_viewport->update();
e0fc5810	224	scale_offset_changed();
adb4b10c JH	225	}
adb4b10c JH	226
38eeddea JH	227	vector< shared_ptr<Trace> > View::get_traces() const
	228	{
	229	const vector< shared_ptr<Signal> > sigs(
	230	session().get_signals());
269528f5	231	#ifdef ENABLE_DECODE
b9329558	232	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	233	session().get_decode_signals());
	234	vector< shared_ptr<Trace> > traces(
	235	sigs.size() + decode_sigs.size());
269528f5 JH	236	#else
	237	vector< shared_ptr<Trace> > traces(sigs.size());
	238	#endif
38eeddea	239
f46e495e	240	auto i = traces.begin();
38eeddea	241	i = copy(sigs.begin(), sigs.end(), i);
269528f5	242	#ifdef ENABLE_DECODE
38eeddea	243	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
269528f5	244	#endif
38eeddea	245
9a2bc5fc	246	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	247	return traces;
	248	}
	249
94936133 JH	250	list<weak_ptr<SelectableItem> > View::selected_items() const
	251	{
	252	list<weak_ptr<SelectableItem> > items;
	253
	254	// List the selected signals
38eeddea	255	const vector< shared_ptr<Trace> > traces(get_traces());
d9aecf1f	256	for (shared_ptr<Trace> t : traces) {
38eeddea JH	257	assert(t);
	258	if (t->selected())
	259	items.push_back(t);
94936133 JH	260	}
	261
	262	// List the selected cursors
	263	if (_cursors.first()->selected())
	264	items.push_back(_cursors.first());
	265	if (_cursors.second()->selected())
	266	items.push_back(_cursors.second());
	267
	268	return items;
	269	}
	270
1bc6525b JH	271	set< shared_ptr<SignalData> > View::get_visible_data() const
	272	{
	273	const vector< shared_ptr<Signal> > sigs(
	274	session().get_signals());
	275
	276	// Make a set of all the visible data objects
	277	set< shared_ptr<SignalData> > visible_data;
d9aecf1f	278	for (const shared_ptr<Signal> sig : sigs)
1bc6525b JH	279	if (sig->enabled())
	280	visible_data.insert(sig->data());
	281
	282	return visible_data;
	283	}
	284
	285	pair<double, double> View::get_time_extents() const
	286	{
	287	const set< shared_ptr<SignalData> > visible_data = get_visible_data();
	288	if (visible_data.empty())
	289	return make_pair(0.0, 0.0);
	290
	291	double left_time = DBL_MAX, right_time = DBL_MIN;
d9aecf1f	292	for (const shared_ptr<SignalData> d : visible_data)
1bc6525b JH	293	{
1bc6525b JH	294	const double start_time = d->get_start_time();
a472a884 JH	295	double samplerate = d->samplerate();
	296	samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
	297
1bc6525b JH	298	left_time = min(left_time, start_time);
1bc6525b JH	299	right_time = max(right_time, start_time +
a472a884	300	d->get_max_sample_count() / samplerate);
1bc6525b JH	301	}
	302
	303	assert(left_time < right_time);
	304	return make_pair(left_time, right_time);
	305	}
	306
f76af637 JH	307	bool View::cursors_shown() const
	308	{
	309	return _show_cursors;
	310	}
	311
	312	void View::show_cursors(bool show)
	313	{
	314	_show_cursors = show;
84a0d458	315	_cursorheader->update();
f76af637 JH	316	_viewport->update();
	317	}
	318
b4d91e56 JH	319	void View::centre_cursors()
	320	{
	321	const double time_width = _scale * _viewport->width();
58864c5c JH	322	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	323	_cursors.second()->set_time(_offset + time_width * 0.6);
84a0d458	324	_cursorheader->update();
b4d91e56 JH	325	_viewport->update();
	326	}
	327
b42d25c4	328	CursorPair& View::cursors()
f76af637 JH	329	{
	330	return _cursors;
	331	}
	332
58864c5c JH	333	const CursorPair& View::cursors() const
	334	{
	335	return _cursors;
	336	}
	337
cbd80f64 JH	338	const QPoint& View::hover_point() const
	339	{
	340	return _hover_point;
	341	}
	342
4b192962 JH	343	void View::normalize_layout()
4b192962 JH	344	{
38eeddea	345	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	346
4b192962 JH	347	int v_min = INT_MAX;
d9aecf1f	348	for (const shared_ptr<Trace> t : traces)
38eeddea	349	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	350
4b192962 JH	351	const int delta = -min(v_min, 0);
d9aecf1f	352	for (shared_ptr<Trace> t : traces)
38eeddea	353	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	354
	355	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	356	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	357	}
	358
9cef9567 JH	359	void View::update_viewport()
	360	{
	361	assert(_viewport);
	362	_viewport->update();
	363	}
	364
f25770e2 JH	365	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	366	{
1bc6525b JH	367	const pair<double, double> extents = get_time_extents();
1bc6525b JH	368	length = (extents.second - extents.first) / _scale;
f25770e2 JH	369	offset = _offset / _scale;
	370	}
	371
d1e7d82c JH	372	void View::set_zoom(double scale, int offset)
	373	{
	374	const double cursor_offset = _offset + _scale * offset;
	375	const double new_scale = max(min(scale, MaxScale), MinScale);
	376	const double new_offset = cursor_offset - new_scale * offset;
	377	set_scale_offset(new_scale, new_offset);
	378	}
	379
cdf7bea7	380	void View::update_scroll()
adb4b10c JH	381	{
	382	assert(_viewport);
	383
	384	const QSize areaSize = _viewport->size();
	385
	386	// Set the horizontal scroll bar
	387	double length = 0, offset = 0;
f25770e2 JH	388	get_scroll_layout(length, offset);
f25770e2 JH	389	length = max(length - areaSize.width(), 0.0);
adb4b10c	390
b4ef7f2a	391	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	392
528bd8a1 JH	393	_updating_scroll = true;
528bd8a1 JH	394
333d5bbc	395	if (length < MaxScrollValue) {
f25770e2 JH	396	horizontalScrollBar()->setRange(0, length);
	397	horizontalScrollBar()->setSliderPosition(offset);
	398	} else {
	399	horizontalScrollBar()->setRange(0, MaxScrollValue);
	400	horizontalScrollBar()->setSliderPosition(
	401	_offset * MaxScrollValue / (_scale * length));
	402	}
adb4b10c	403
528bd8a1 JH	404	_updating_scroll = false;
528bd8a1 JH	405
adb4b10c JH	406	// Set the vertical scrollbar
	407	verticalScrollBar()->setPageStep(areaSize.height());
	408	verticalScrollBar()->setRange(0,
4b192962 JH	409	_viewport->get_total_height() + SignalMargin -
4b192962 JH	410	areaSize.height());
adb4b10c JH	411	}
adb4b10c JH	412
d7c0ca4a JH	413	void View::update_layout()
d7c0ca4a JH	414	{
a6c1726e JH	415	setViewportMargins(_header->sizeHint().width(),
a6c1726e JH	416	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	417	_ruler->setGeometry(_viewport->x(), 0,
d7c0ca4a JH	418	_viewport->width(), _viewport->y());
84a0d458 JS	419	_cursorheader->setGeometry(
	420	_viewport->x(),
	421	_ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2,
	422	_viewport->width(), _cursorheader->sizeHint().height());
d7c0ca4a JH	423	_header->setGeometry(0, _viewport->y(),
	424	_viewport->x(), _viewport->height());
	425	update_scroll();
	426	}
	427
38eeddea JH	428	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	429	const shared_ptr<Trace> &b)
	430	{
	431	assert(a);
	432	assert(b);
	433	return a->get_v_offset() < b->get_v_offset();
	434	}
	435
cbd80f64 JH	436	bool View::eventFilter(QObject object, QEvent event)
	437	{
	438	const QEvent::Type type = event->type();
333d5bbc	439	if (type == QEvent::MouseMove) {
cbd80f64 JH	440
cbd80f64 JH	441	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	442	if (object == _viewport)
cbd80f64	443	_hover_point = mouse_event->pos();
84a0d458	444	else if (object == _ruler \|\| object == _cursorheader)
cbd80f64	445	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	446	else if (object == _header)
cbd80f64 JH	447	_hover_point = QPoint(0, mouse_event->y());
	448	else
	449	_hover_point = QPoint(-1, -1);
	450
	451	hover_point_changed();
	452
333d5bbc	453	} else if (type == QEvent::Leave) {
cbd80f64 JH	454	_hover_point = QPoint(-1, -1);
	455	hover_point_changed();
	456	}
	457
	458	return QObject::eventFilter(object, event);
	459	}
	460
cdf7bea7	461	bool View::viewportEvent(QEvent *e)
adb4b10c JH	462	{
	463	switch(e->type()) {
	464	case QEvent::Paint:
	465	case QEvent::MouseButtonPress:
	466	case QEvent::MouseButtonRelease:
	467	case QEvent::MouseButtonDblClick:
	468	case QEvent::MouseMove:
	469	case QEvent::Wheel:
	470	return false;
	471
	472	default:
	473	return QAbstractScrollArea::viewportEvent(e);
	474	}
	475	}
	476
e314eca4	477	void View::resizeEvent(QResizeEvent*)
adb4b10c	478	{
d7c0ca4a	479	update_layout();
adb4b10c JH	480	}
adb4b10c JH	481
b16907d3	482	void View::h_scroll_value_changed(int value)
adb4b10c	483	{
528bd8a1 JH	484	if (_updating_scroll)
	485	return;
	486
f25770e2	487	const int range = horizontalScrollBar()->maximum();
333d5bbc	488	if (range < MaxScrollValue)
f25770e2 JH	489	_offset = _scale * value;
	490	else {
	491	double length = 0, offset;
	492	get_scroll_layout(length, offset);
	493	_offset = _scale * length * value / MaxScrollValue;
	494	}
	495
ccdd3ef5	496	_ruler->update();
84a0d458	497	_cursorheader->update();
adb4b10c JH	498	_viewport->update();
	499	}
	500
cdf7bea7	501	void View::v_scroll_value_changed(int value)
adb4b10c JH	502	{
adb4b10c JH	503	_v_offset = value;
1d8dca91	504	_header->update();
adb4b10c JH	505	_viewport->update();
	506	}
	507
69dd2b03 JH	508	void View::signals_changed()
69dd2b03 JH	509	{
ef8311a4	510	int offset = SignalMargin + SignalHeight;
01fd3263	511	const vector< shared_ptr<Trace> > traces(get_traces());
d9aecf1f	512	for (shared_ptr<Trace> t : traces) {
01fd3263	513	t->set_view(this);
01fd3263	514	t->set_v_offset(offset);
ef8311a4 JH	515	offset += SignalHeight + 2 * SignalMargin;
	516	}
	517
a6c1726e	518	update_layout();
ef8311a4	519	normalize_layout();
69dd2b03 JH	520	}
69dd2b03 JH	521
cdf7bea7	522	void View::data_updated()
adb4b10c	523	{
adb4b10c JH	524	// Update the scroll bars
	525	update_scroll();
	526
	527	// Repaint the view
	528	_viewport->update();
	529	}
cdf7bea7	530
ca4ec3ea JH	531	void View::marker_time_changed()
ca4ec3ea JH	532	{
84a0d458	533	_cursorheader->update();
ca4ec3ea JH	534	_viewport->update();
	535	}
	536
07204819	537	void View::on_signals_moved()
54401bbb	538	{
07204819 JH	539	update_scroll();
07204819 JH	540	signals_moved();
54401bbb JH	541	}
54401bbb JH	542
d7c0ca4a JH	543	void View::on_geometry_updated()
	544	{
	545	update_layout();
	546	}
	547
cdf7bea7 JH	548	} // namespace view
cdf7bea7 JH	549	} // namespace pv