[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 <cassert>
#include <climits>
#include <cmath>
#include <mutex>

#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 boost::shared_lock;
using boost::shared_mutex;
using pv::data::SignalData;
using std::back_inserter;
using std::deque;
using std::list;
using std::lock_guard;
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 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(capture_state_changed(int)),
		this, SLOT(data_updated()));
	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(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()));

	connect(this, SIGNAL(hover_point_changed()),
		this, SLOT(on_hover_point_changed()));

	connect(&_lazy_event_handler, SIGNAL(timeout()),
		this, SLOT(process_sticky_events()));
	_lazy_event_handler.setSingleShot(true);

	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 transparent widgets are on the top
	_cursorheader->raise();
	_header->raise();
}

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

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

View* View::view()
{
	return this;
}

const View* View::view() const
{
	return this;
}

Viewport* View::viewport()
{
	return _viewport;
}

const Viewport* View::viewport() const
{
	return _viewport;
}

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

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

int View::owner_v_offset() const
{
	return -_v_offset;
}

unsigned int View::depth() const
{
	return 0;
}

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;

	// 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();
}

set< shared_ptr<SignalData> > View::get_visible_data() const
{
	shared_lock<shared_mutex> lock(session().signals_mutex());
	const vector< shared_ptr<Signal> > &sigs(session().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::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());

	const pair<int, int> extents = v_extents();
	const int extra_scroll_height = (extents.second - extents.first) / 4;
	verticalScrollBar()->setRange(extents.first - extra_scroll_height,
		extents.first + extra_scroll_height);
}

void View::update_layout()
{
	setViewportMargins(
		_header->sizeHint().width() - pv::view::Header::BaselineOffset,
		_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(),
		_header->sizeHint().width(), _viewport->height());
	update_scroll();
}

void View::paint_label(QPainter &p, int right, bool hover)
{
	(void)p;
	(void)right;
	(void)hover;
}

QRectF View::label_rect(int right)
{
	(void)right;
	return QRectF();
}

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:
	case QEvent::TouchBegin:
	case QEvent::TouchUpdate:
	case QEvent::TouchEnd:
		return false;

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

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

void View::appearance_changed(bool label, bool content)
{
	if (label)
		_header->update();
	if (content)
		_viewport->update();
}

void View::extents_changed(bool horz, bool vert)
{
	_sticky_events |=
		(horz ? SelectableItemHExtentsChanged : 0) |
		(vert ? SelectableItemVExtentsChanged : 0);
	_lazy_event_handler.start();
}

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()
{
	// Populate the traces
	clear_child_items();

	shared_lock<shared_mutex> lock(session().signals_mutex());
	const vector< shared_ptr<Signal> > &sigs(session().signals());
	for (auto s : sigs)
		add_child_item(s);

#ifdef ENABLE_DECODE
	const vector< shared_ptr<DecodeTrace> > decode_sigs(
		session().get_decode_signals());
	for (auto s : decode_sigs)
		add_child_item(s);
#endif

	// Create the initial layout
	int offset = 0;
	for (shared_ptr<RowItem> r : *this) {
		const pair<int, int> extents = r->v_extents();
		if (r->enabled())
			offset += -extents.first;
		r->force_to_v_offset(offset);
		if (r->enabled())
			offset += extents.second;
	}

	update_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::process_sticky_events()
{
	if (_sticky_events & SelectableItemHExtentsChanged)
		update_layout();
	if (_sticky_events & SelectableItemVExtentsChanged) {
		_viewport->update();
		_header->update();
	}

	// Clear the sticky events
	_sticky_events = 0;
}

void View::on_hover_point_changed()
{
	for (shared_ptr<RowItem> r : *this)
		r->hover_point_changed();
}

} // 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
c3a740dd JH	25	#include <cassert>
	26	#include <climits>
	27	#include <cmath>
	28	#include <mutex>
adb4b10c	29
adb4b10c	30	#include <QEvent>
cbd80f64	31	#include <QMouseEvent>
adb4b10c JH	32	#include <QScrollBar>
adb4b10c JH	33
84a0d458	34	#include "cursorheader.h"
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
aca64cac JH	46	using boost::shared_lock;
aca64cac JH	47	using boost::shared_mutex;
1bc6525b	48	using pv::data::SignalData;
a2321722	49	using std::back_inserter;
819f4c25 JH	50	using std::deque;
819f4c25 JH	51	using std::list;
c3a740dd	52	using std::lock_guard;
819f4c25	53	using std::max;
1bc6525b	54	using std::make_pair;
819f4c25	55	using std::min;
1bc6525b	56	using std::pair;
819f4c25	57	using std::set;
f9abf97e	58	using std::shared_ptr;
819f4c25	59	using std::vector;
f9abf97e	60	using std::weak_ptr;
adb4b10c	61
cdf7bea7 JH	62	namespace pv {
cdf7bea7 JH	63	namespace view {
adb4b10c	64
cdf7bea7 JH	65	const double View::MaxScale = 1e9;
cdf7bea7 JH	66	const double View::MinScale = 1e-15;
adb4b10c	67
f25770e2 JH	68	const int View::MaxScrollValue = INT_MAX / 2;
f25770e2 JH	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)),
84a0d458	79	_cursorheader(new CursorHeader(*this)),
1d8dca91	80	_header(new Header(*this)),
adb4b10c JH	81	_scale(1e-6),
adb4b10c JH	82	_offset(0),
cbd80f64	83	_v_offset(0),
528bd8a1	84	_updating_scroll(false),
f76af637	85	_show_cursors(false),
b42d25c4	86	_cursors(*this),
cbd80f64	87	_hover_point(-1, -1)
adb4b10c	88	{
b16907d3 JH	89	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
b16907d3 JH	90	this, SLOT(h_scroll_value_changed(int)));
adb4b10c JH	91	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
adb4b10c JH	92	this, SLOT(v_scroll_value_changed(int)));
69dd2b03 JH	93
	94	connect(&_session, SIGNAL(signals_changed()),
	95	this, SLOT(signals_changed()));
50f97924 PZ	96	connect(&_session, SIGNAL(capture_state_changed(int)),
50f97924 PZ	97	this, SLOT(data_updated()));
1f374035 JH	98	connect(&_session, SIGNAL(data_received()),
	99	this, SLOT(data_updated()));
	100	connect(&_session, SIGNAL(frame_ended()),
adb4b10c	101	this, SLOT(data_updated()));
1d8dca91	102
58864c5c	103	connect(_cursors.first().get(), SIGNAL(time_changed()),
ca4ec3ea	104	this, SLOT(marker_time_changed()));
58864c5c	105	connect(_cursors.second().get(), SIGNAL(time_changed()),
ca4ec3ea JH	106	this, SLOT(marker_time_changed()));
ca4ec3ea JH	107
54401bbb	108	connect(_header, SIGNAL(signals_moved()),
07204819	109	this, SLOT(on_signals_moved()));
54401bbb	110
17348f85	111	connect(_header, SIGNAL(selection_changed()),
84a0d458 JS	112	_cursorheader, SLOT(clear_selection()));
84a0d458 JS	113	connect(_cursorheader, SIGNAL(selection_changed()),
17348f85 JH	114	_header, SLOT(clear_selection()));
17348f85 JH	115
8b454527 JH	116	connect(_header, SIGNAL(selection_changed()),
8b454527 JH	117	this, SIGNAL(selection_changed()));
84a0d458	118	connect(_cursorheader, SIGNAL(selection_changed()),
8b454527 JH	119	this, SIGNAL(selection_changed()));
8b454527 JH	120
33c62f44 JH	121	connect(this, SIGNAL(hover_point_changed()),
	122	this, SLOT(on_hover_point_changed()));
	123
32218d3e JH	124	connect(&_lazy_event_handler, SIGNAL(timeout()),
	125	this, SLOT(process_sticky_events()));
	126	_lazy_event_handler.setSingleShot(true);
	127
adb4b10c	128	setViewport(_viewport);
cbd80f64 JH	129
	130	_viewport->installEventFilter(this);
	131	_ruler->installEventFilter(this);
84a0d458	132	_cursorheader->installEventFilter(this);
cbd80f64	133	_header->installEventFilter(this);
d873f4d6	134
9f46d905 JH	135	// Trigger the initial event manually. The default device has signals
9f46d905 JH	136	// which were created before this object came into being
d873f4d6	137	signals_changed();
84a0d458	138
512bfc56	139	// make sure the transparent widgets are on the top
84a0d458	140	_cursorheader->raise();
512bfc56	141	_header->raise();
adb4b10c JH	142	}
adb4b10c JH	143
1d19ef83 JH	144	SigSession& View::session()
	145	{
	146	return _session;
	147	}
	148
38eeddea JH	149	const SigSession& View::session() const
	150	{
	151	return _session;
	152	}
	153
eae6e30a JH	154	View* View::view()
	155	{
	156	return this;
	157	}
	158
	159	const View* View::view() const
	160	{
	161	return this;
	162	}
	163
2ae445ba SA	164	Viewport* View::viewport()
	165	{
	166	return _viewport;
	167	}
	168
	169	const Viewport* View::viewport() const
	170	{
	171	return _viewport;
	172	}
	173
cdf7bea7	174	double View::scale() const
adb4b10c JH	175	{
	176	return _scale;
	177	}
	178
cdf7bea7	179	double View::offset() const
adb4b10c JH	180	{
	181	return _offset;
	182	}
	183
eae6e30a	184	int View::owner_v_offset() const
adb4b10c	185	{
23935421	186	return -_v_offset;
adb4b10c JH	187	}
adb4b10c JH	188
3e769a37 JH	189	unsigned int View::depth() const
	190	{
	191	return 0;
	192	}
	193
cdf7bea7	194	void View::zoom(double steps)
adb4b10c	195	{
f3f98f8f	196	zoom(steps, _viewport->width() / 2);
adb4b10c JH	197	}
adb4b10c JH	198
17c0f398 JH	199	void View::zoom(double steps, int offset)
17c0f398 JH	200	{
8b2e2a9a	201	set_zoom(_scale * pow(3.0/2.0, -steps), offset);
17c0f398 JH	202	}
17c0f398 JH	203
ca46b534 JH	204	void View::zoom_fit()
ca46b534 JH	205	{
1bc6525b JH	206	const pair<double, double> extents = get_time_extents();
	207	const double delta = extents.second - extents.first;
	208	if (delta < 1e-12)
ca46b534 JH	209	return;
	210
	211	assert(_viewport);
	212	const int w = _viewport->width();
	213	if (w <= 0)
	214	return;
	215
78311127 JH	216	const double scale = max(min(delta / w, MaxScale), MinScale);
78311127 JH	217	set_scale_offset(scale, extents.first);
ca46b534 JH	218	}
ca46b534 JH	219
d1e7d82c JH	220	void View::zoom_one_to_one()
	221	{
	222	using pv::data::SignalData;
	223
d1e7d82c	224	// Make a set of all the visible data objects
0fc664a9	225	set< shared_ptr<SignalData> > visible_data = get_visible_data();
d1e7d82c JH	226	if (visible_data.empty())
	227	return;
	228
	229	double samplerate = 0.0;
d9aecf1f	230	for (const shared_ptr<SignalData> d : visible_data) {
d1e7d82c JH	231	assert(d);
	232	samplerate = max(samplerate, d->samplerate());
	233	}
	234
	235	if (samplerate == 0.0)
	236	return;
	237
	238	assert(_viewport);
	239	const int w = _viewport->width();
	240	if (w <= 0)
	241	return;
	242
	243	set_zoom(1.0 / samplerate, w / 2);
	244	}
	245
cdf7bea7	246	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	247	{
	248	_scale = scale;
	249	_offset = offset;
ccdd3ef5	250
adb4b10c	251	update_scroll();
ccdd3ef5	252	_ruler->update();
84a0d458	253	_cursorheader->update();
adb4b10c	254	_viewport->update();
e0fc5810	255	scale_offset_changed();
adb4b10c JH	256	}
adb4b10c JH	257
1bc6525b JH	258	set< shared_ptr<SignalData> > View::get_visible_data() const
1bc6525b JH	259	{
aca64cac	260	shared_lock<shared_mutex> lock(session().signals_mutex());
c3a740dd	261	const vector< shared_ptr<Signal> > &sigs(session().signals());
1bc6525b JH	262
	263	// Make a set of all the visible data objects
	264	set< shared_ptr<SignalData> > visible_data;
d9aecf1f	265	for (const shared_ptr<Signal> sig : sigs)
1bc6525b JH	266	if (sig->enabled())
	267	visible_data.insert(sig->data());
	268
	269	return visible_data;
	270	}
	271
	272	pair<double, double> View::get_time_extents() const
	273	{
	274	const set< shared_ptr<SignalData> > visible_data = get_visible_data();
	275	if (visible_data.empty())
	276	return make_pair(0.0, 0.0);
	277
	278	double left_time = DBL_MAX, right_time = DBL_MIN;
d9aecf1f	279	for (const shared_ptr<SignalData> d : visible_data)
1bc6525b JH	280	{
1bc6525b JH	281	const double start_time = d->get_start_time();
a472a884 JH	282	double samplerate = d->samplerate();
	283	samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
	284
1bc6525b JH	285	left_time = min(left_time, start_time);
1bc6525b JH	286	right_time = max(right_time, start_time +
a472a884	287	d->get_max_sample_count() / samplerate);
1bc6525b JH	288	}
	289
	290	assert(left_time < right_time);
	291	return make_pair(left_time, right_time);
	292	}
	293
f76af637 JH	294	bool View::cursors_shown() const
	295	{
	296	return _show_cursors;
	297	}
	298
	299	void View::show_cursors(bool show)
	300	{
	301	_show_cursors = show;
84a0d458	302	_cursorheader->update();
f76af637 JH	303	_viewport->update();
	304	}
	305
b4d91e56 JH	306	void View::centre_cursors()
	307	{
	308	const double time_width = _scale * _viewport->width();
58864c5c JH	309	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	310	_cursors.second()->set_time(_offset + time_width * 0.6);
84a0d458	311	_cursorheader->update();
b4d91e56 JH	312	_viewport->update();
	313	}
	314
b42d25c4	315	CursorPair& View::cursors()
f76af637 JH	316	{
	317	return _cursors;
	318	}
	319
58864c5c JH	320	const CursorPair& View::cursors() const
	321	{
	322	return _cursors;
	323	}
	324
cbd80f64 JH	325	const QPoint& View::hover_point() const
	326	{
	327	return _hover_point;
	328	}
	329
9cef9567 JH	330	void View::update_viewport()
	331	{
	332	assert(_viewport);
	333	_viewport->update();
	334	}
	335
f25770e2 JH	336	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	337	{
1bc6525b JH	338	const pair<double, double> extents = get_time_extents();
1bc6525b JH	339	length = (extents.second - extents.first) / _scale;
f25770e2 JH	340	offset = _offset / _scale;
	341	}
	342
d1e7d82c JH	343	void View::set_zoom(double scale, int offset)
	344	{
	345	const double cursor_offset = _offset + _scale * offset;
	346	const double new_scale = max(min(scale, MaxScale), MinScale);
	347	const double new_offset = cursor_offset - new_scale * offset;
	348	set_scale_offset(new_scale, new_offset);
	349	}
	350
cdf7bea7	351	void View::update_scroll()
adb4b10c JH	352	{
	353	assert(_viewport);
	354
	355	const QSize areaSize = _viewport->size();
	356
	357	// Set the horizontal scroll bar
	358	double length = 0, offset = 0;
f25770e2 JH	359	get_scroll_layout(length, offset);
f25770e2 JH	360	length = max(length - areaSize.width(), 0.0);
adb4b10c	361
b4ef7f2a	362	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	363
528bd8a1 JH	364	_updating_scroll = true;
528bd8a1 JH	365
333d5bbc	366	if (length < MaxScrollValue) {
f25770e2 JH	367	horizontalScrollBar()->setRange(0, length);
	368	horizontalScrollBar()->setSliderPosition(offset);
	369	} else {
	370	horizontalScrollBar()->setRange(0, MaxScrollValue);
	371	horizontalScrollBar()->setSliderPosition(
	372	_offset * MaxScrollValue / (_scale * length));
	373	}
adb4b10c	374
528bd8a1 JH	375	_updating_scroll = false;
528bd8a1 JH	376
adb4b10c JH	377	// Set the vertical scrollbar
adb4b10c JH	378	verticalScrollBar()->setPageStep(areaSize.height());
a5d93c27 JH	379
	380	const pair<int, int> extents = v_extents();
	381	const int extra_scroll_height = (extents.second - extents.first) / 4;
	382	verticalScrollBar()->setRange(extents.first - extra_scroll_height,
	383	extents.first + extra_scroll_height);
adb4b10c JH	384	}
adb4b10c JH	385
d7c0ca4a JH	386	void View::update_layout()
d7c0ca4a JH	387	{
512bfc56 JS	388	setViewportMargins(
512bfc56 JS	389	_header->sizeHint().width() - pv::view::Header::BaselineOffset,
a6c1726e	390	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	391	_ruler->setGeometry(_viewport->x(), 0,
d7c0ca4a JH	392	_viewport->width(), _viewport->y());
84a0d458 JS	393	_cursorheader->setGeometry(
	394	_viewport->x(),
	395	_ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2,
	396	_viewport->width(), _cursorheader->sizeHint().height());
d7c0ca4a	397	_header->setGeometry(0, _viewport->y(),
512bfc56	398	_header->sizeHint().width(), _viewport->height());
d7c0ca4a JH	399	update_scroll();
	400	}
	401
eae6e30a JH	402	void View::paint_label(QPainter &p, int right, bool hover)
	403	{
	404	(void)p;
	405	(void)right;
	406	(void)hover;
	407	}
	408
	409	QRectF View::label_rect(int right)
	410	{
	411	(void)right;
	412	return QRectF();
	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();
84a0d458	423	else if (object == _ruler \|\| object == _cursorheader)
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:
4b4f1c0d MC	449	case QEvent::TouchBegin:
	450	case QEvent::TouchUpdate:
	451	case QEvent::TouchEnd:
adb4b10c JH	452	return false;
	453
	454	default:
	455	return QAbstractScrollArea::viewportEvent(e);
	456	}
	457	}
	458
e314eca4	459	void View::resizeEvent(QResizeEvent*)
adb4b10c	460	{
d7c0ca4a	461	update_layout();
adb4b10c JH	462	}
adb4b10c JH	463
32218d3e JH	464	void View::appearance_changed(bool label, bool content)
	465	{
	466	if (label)
	467	_header->update();
	468	if (content)
	469	_viewport->update();
	470	}
	471
	472	void View::extents_changed(bool horz, bool vert)
	473	{
	474	_sticky_events \|=
	475	(horz ? SelectableItemHExtentsChanged : 0) \|
	476	(vert ? SelectableItemVExtentsChanged : 0);
	477	_lazy_event_handler.start();
	478	}
	479
b16907d3	480	void View::h_scroll_value_changed(int value)
adb4b10c	481	{
528bd8a1 JH	482	if (_updating_scroll)
	483	return;
	484
f25770e2	485	const int range = horizontalScrollBar()->maximum();
333d5bbc	486	if (range < MaxScrollValue)
f25770e2 JH	487	_offset = _scale * value;
	488	else {
	489	double length = 0, offset;
	490	get_scroll_layout(length, offset);
	491	_offset = _scale * length * value / MaxScrollValue;
	492	}
	493
ccdd3ef5	494	_ruler->update();
84a0d458	495	_cursorheader->update();
adb4b10c JH	496	_viewport->update();
	497	}
	498
cdf7bea7	499	void View::v_scroll_value_changed(int value)
adb4b10c JH	500	{
adb4b10c JH	501	_v_offset = value;
1d8dca91	502	_header->update();
adb4b10c JH	503	_viewport->update();
	504	}
	505
69dd2b03 JH	506	void View::signals_changed()
69dd2b03 JH	507	{
68b21a71 JH	508	// Populate the traces
	509	clear_child_items();
	510
aca64cac	511	shared_lock<shared_mutex> lock(session().signals_mutex());
c3a740dd	512	const vector< shared_ptr<Signal> > &sigs(session().signals());
68b21a71 JH	513	for (auto s : sigs)
	514	add_child_item(s);
	515
	516	#ifdef ENABLE_DECODE
	517	const vector< shared_ptr<DecodeTrace> > decode_sigs(
	518	session().get_decode_signals());
	519	for (auto s : decode_sigs)
	520	add_child_item(s);
	521	#endif
	522
	523	// Create the initial layout
a5d93c27	524	int offset = 0;
aa59d5c2	525	for (shared_ptr<RowItem> r : *this) {
a5d93c27 JH	526	const pair<int, int> extents = r->v_extents();
	527	if (r->enabled())
	528	offset += -extents.first;
be9e7b4b	529	r->force_to_v_offset(offset);
a5d93c27 JH	530	if (r->enabled())
a5d93c27 JH	531	offset += extents.second;
ef8311a4 JH	532	}
ef8311a4 JH	533
a6c1726e	534	update_layout();
69dd2b03 JH	535	}
69dd2b03 JH	536
cdf7bea7	537	void View::data_updated()
adb4b10c	538	{
adb4b10c JH	539	// Update the scroll bars
	540	update_scroll();
	541
	542	// Repaint the view
	543	_viewport->update();
	544	}
cdf7bea7	545
ca4ec3ea JH	546	void View::marker_time_changed()
ca4ec3ea JH	547	{
84a0d458	548	_cursorheader->update();
ca4ec3ea JH	549	_viewport->update();
	550	}
	551
07204819	552	void View::on_signals_moved()
54401bbb	553	{
07204819 JH	554	update_scroll();
07204819 JH	555	signals_moved();
54401bbb JH	556	}
54401bbb JH	557
32218d3e	558	void View::process_sticky_events()
d7c0ca4a	559	{
32218d3e JH	560	if (_sticky_events & SelectableItemHExtentsChanged)
	561	update_layout();
	562	if (_sticky_events & SelectableItemVExtentsChanged) {
	563	_viewport->update();
	564	_header->update();
	565	}
	566
	567	// Clear the sticky events
	568	_sticky_events = 0;
d7c0ca4a JH	569	}
d7c0ca4a JH	570
33c62f44 JH	571	void View::on_hover_point_changed()
33c62f44 JH	572	{
aa59d5c2	573	for (shared_ptr<RowItem> r : *this)
eae6e30a	574	r->hover_point_changed();
33c62f44 JH	575	}
33c62f44 JH	576
cdf7bea7 JH	577	} // namespace view
cdf7bea7 JH	578	} // namespace pv