[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
 */

#include <libsigrokdecode/libsigrokdecode.h>

#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());
	const vector< shared_ptr<DecodeTrace> > decode_sigs(
		session().get_decode_signals());
	vector< shared_ptr<Trace> > traces(
		sigs.size() + decode_sigs.size());

	vector< shared_ptr<Trace> >::iterator i = traces.begin();
	i = copy(sigs.begin(), sigs.end(), i);
	i = copy(decode_sigs.begin(), decode_sigs.end(), i);

	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
4e5a4405 JH	21	#include <libsigrokdecode/libsigrokdecode.h>
4e5a4405 JH	22
adb4b10c	23	#include <assert.h>
f25770e2	24	#include <limits.h>
adb4b10c JH	25	#include <math.h>
adb4b10c JH	26
ca46b534 JH	27	#include <set>
ca46b534 JH	28
adb4b10c JH	29	#include <boost/foreach.hpp>
	30
	31	#include <QEvent>
cbd80f64	32	#include <QMouseEvent>
adb4b10c JH	33	#include <QScrollBar>
adb4b10c JH	34
b9329558	35	#include "decodetrace.h"
1d8dca91	36	#include "header.h"
ccdd3ef5	37	#include "ruler.h"
2e575351	38	#include "signal.h"
cdf7bea7 JH	39	#include "view.h"
cdf7bea7 JH	40	#include "viewport.h"
adb4b10c	41
1b1ec774 JH	42	#include "pv/sigsession.h"
	43	#include "pv/data/logic.h"
	44	#include "pv/data/logicsnapshot.h"
adb4b10c JH	45
	46	using namespace boost;
	47	using namespace std;
	48
cdf7bea7 JH	49	namespace pv {
cdf7bea7 JH	50	namespace view {
adb4b10c	51
cdf7bea7 JH	52	const double View::MaxScale = 1e9;
cdf7bea7 JH	53	const double View::MinScale = 1e-15;
adb4b10c	54
f25770e2 JH	55	const int View::MaxScrollValue = INT_MAX / 2;
f25770e2 JH	56
8d44d030 JH	57	const int View::SignalHeight = 30;
8d44d030 JH	58	const int View::SignalMargin = 10;
49153683	59	const int View::SignalSnapGridSize = 10;
1d8dca91	60
f76af637 JH	61	const QColor View::CursorAreaColour(220, 231, 243);
f76af637 JH	62
2e04f9bd JH	63	const QSizeF View::LabelPadding(4, 0);
2e04f9bd JH	64
cdf7bea7	65	View::View(SigSession &session, QWidget *parent) :
adb4b10c JH	66	QAbstractScrollArea(parent),
adb4b10c JH	67	_session(session),
cdf7bea7	68	_viewport(new Viewport(*this)),
ccdd3ef5	69	_ruler(new Ruler(*this)),
1d8dca91	70	_header(new Header(*this)),
adb4b10c JH	71	_data_length(0),
	72	_scale(1e-6),
	73	_offset(0),
cbd80f64	74	_v_offset(0),
528bd8a1	75	_updating_scroll(false),
f76af637	76	_show_cursors(false),
b42d25c4	77	_cursors(*this),
cbd80f64	78	_hover_point(-1, -1)
adb4b10c	79	{
b16907d3 JH	80	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
b16907d3 JH	81	this, SLOT(h_scroll_value_changed(int)));
adb4b10c JH	82	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
adb4b10c JH	83	this, SLOT(v_scroll_value_changed(int)));
69dd2b03 JH	84
	85	connect(&_session, SIGNAL(signals_changed()),
	86	this, SLOT(signals_changed()));
adb4b10c JH	87	connect(&_session, SIGNAL(data_updated()),
adb4b10c JH	88	this, SLOT(data_updated()));
1d8dca91	89
58864c5c	90	connect(_cursors.first().get(), SIGNAL(time_changed()),
ca4ec3ea	91	this, SLOT(marker_time_changed()));
58864c5c	92	connect(_cursors.second().get(), SIGNAL(time_changed()),
ca4ec3ea JH	93	this, SLOT(marker_time_changed()));
ca4ec3ea JH	94
d7c0ca4a JH	95	connect(_header, SIGNAL(geometry_updated()),
d7c0ca4a JH	96	this, SLOT(on_geometry_updated()));
54401bbb	97	connect(_header, SIGNAL(signals_moved()),
07204819	98	this, SLOT(on_signals_moved()));
54401bbb	99
17348f85 JH	100	connect(_header, SIGNAL(selection_changed()),
	101	_ruler, SLOT(clear_selection()));
	102	connect(_ruler, SIGNAL(selection_changed()),
	103	_header, SLOT(clear_selection()));
	104
8b454527 JH	105	connect(_header, SIGNAL(selection_changed()),
	106	this, SIGNAL(selection_changed()));
	107	connect(_ruler, SIGNAL(selection_changed()),
	108	this, SIGNAL(selection_changed()));
	109
adb4b10c	110	setViewport(_viewport);
cbd80f64 JH	111
	112	_viewport->installEventFilter(this);
	113	_ruler->installEventFilter(this);
	114	_header->installEventFilter(this);
adb4b10c JH	115	}
adb4b10c JH	116
1d19ef83 JH	117	SigSession& View::session()
	118	{
	119	return _session;
	120	}
	121
38eeddea JH	122	const SigSession& View::session() const
	123	{
	124	return _session;
	125	}
	126
cdf7bea7	127	double View::scale() const
adb4b10c JH	128	{
	129	return _scale;
	130	}
	131
cdf7bea7	132	double View::offset() const
adb4b10c JH	133	{
	134	return _offset;
	135	}
	136
cdf7bea7	137	int View::v_offset() const
adb4b10c JH	138	{
	139	return _v_offset;
	140	}
	141
cdf7bea7	142	void View::zoom(double steps)
adb4b10c	143	{
f3f98f8f	144	zoom(steps, _viewport->width() / 2);
adb4b10c JH	145	}
adb4b10c JH	146
17c0f398 JH	147	void View::zoom(double steps, int offset)
17c0f398 JH	148	{
e31551da JH	149	const double new_scale = max(min(_scale * pow(3.0/2.0, -steps),
e31551da JH	150	MaxScale), MinScale);
d1e7d82c	151	set_zoom(new_scale, offset);
17c0f398 JH	152	}
17c0f398 JH	153
ca46b534 JH	154	void View::zoom_fit()
	155	{
	156	using pv::data::SignalData;
	157
	158	const vector< shared_ptr<Signal> > sigs(
	159	session().get_signals());
	160
	161	// Make a set of all the visible data objects
	162	set< shared_ptr<SignalData> > visible_data;
	163	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	164	if (sig->enabled())
	165	visible_data.insert(sig->data());
	166
	167	if (visible_data.empty())
	168	return;
	169
	170	double left_time = DBL_MAX, right_time = DBL_MIN;
	171	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data)
	172	{
	173	const double start_time = d->get_start_time();
	174	left_time = min(left_time, start_time);
	175	right_time = max(right_time, start_time +
9d28da5a	176	d->get_max_sample_count() / d->samplerate());
ca46b534 JH	177	}
	178
	179	assert(left_time < right_time);
	180	if (right_time - left_time < 1e-12)
	181	return;
	182
	183	assert(_viewport);
	184	const int w = _viewport->width();
	185	if (w <= 0)
	186	return;
	187
	188	set_scale_offset((right_time - left_time) / w, left_time);
	189	}
	190
d1e7d82c JH	191	void View::zoom_one_to_one()
	192	{
	193	using pv::data::SignalData;
	194
	195	const vector< shared_ptr<Signal> > sigs(
	196	session().get_signals());
	197
	198	// Make a set of all the visible data objects
	199	set< shared_ptr<SignalData> > visible_data;
	200	BOOST_FOREACH(const shared_ptr<Signal> sig, sigs)
	201	if (sig->enabled())
	202	visible_data.insert(sig->data());
	203
	204	if (visible_data.empty())
	205	return;
	206
	207	double samplerate = 0.0;
	208	BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) {
	209	assert(d);
	210	samplerate = max(samplerate, d->samplerate());
	211	}
	212
	213	if (samplerate == 0.0)
	214	return;
	215
	216	assert(_viewport);
	217	const int w = _viewport->width();
	218	if (w <= 0)
	219	return;
	220
	221	set_zoom(1.0 / samplerate, w / 2);
	222	}
	223
cdf7bea7	224	void View::set_scale_offset(double scale, double offset)
adb4b10c JH	225	{
	226	_scale = scale;
	227	_offset = offset;
ccdd3ef5	228
adb4b10c	229	update_scroll();
ccdd3ef5	230	_ruler->update();
adb4b10c	231	_viewport->update();
e0fc5810	232	scale_offset_changed();
adb4b10c JH	233	}
adb4b10c JH	234
38eeddea JH	235	vector< shared_ptr<Trace> > View::get_traces() const
	236	{
	237	const vector< shared_ptr<Signal> > sigs(
	238	session().get_signals());
b9329558	239	const vector< shared_ptr<DecodeTrace> > decode_sigs(
38eeddea JH	240	session().get_decode_signals());
	241	vector< shared_ptr<Trace> > traces(
	242	sigs.size() + decode_sigs.size());
	243
	244	vector< shared_ptr<Trace> >::iterator i = traces.begin();
	245	i = copy(sigs.begin(), sigs.end(), i);
	246	i = copy(decode_sigs.begin(), decode_sigs.end(), i);
	247
9a2bc5fc	248	stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets);
38eeddea JH	249	return traces;
	250	}
	251
94936133 JH	252	list<weak_ptr<SelectableItem> > View::selected_items() const
	253	{
	254	list<weak_ptr<SelectableItem> > items;
	255
	256	// List the selected signals
38eeddea JH	257	const vector< shared_ptr<Trace> > traces(get_traces());
	258	BOOST_FOREACH (shared_ptr<Trace> t, traces) {
	259	assert(t);
	260	if (t->selected())
	261	items.push_back(t);
94936133 JH	262	}
	263
	264	// List the selected cursors
	265	if (_cursors.first()->selected())
	266	items.push_back(_cursors.first());
	267	if (_cursors.second()->selected())
	268	items.push_back(_cursors.second());
	269
	270	return items;
	271	}
	272
f76af637 JH	273	bool View::cursors_shown() const
	274	{
	275	return _show_cursors;
	276	}
	277
	278	void View::show_cursors(bool show)
	279	{
	280	_show_cursors = show;
	281	_ruler->update();
	282	_viewport->update();
	283	}
	284
b4d91e56 JH	285	void View::centre_cursors()
	286	{
	287	const double time_width = _scale * _viewport->width();
58864c5c JH	288	_cursors.first()->set_time(_offset + time_width * 0.4);
58864c5c JH	289	_cursors.second()->set_time(_offset + time_width * 0.6);
b4d91e56 JH	290	_ruler->update();
	291	_viewport->update();
	292	}
	293
b42d25c4	294	CursorPair& View::cursors()
f76af637 JH	295	{
	296	return _cursors;
	297	}
	298
58864c5c JH	299	const CursorPair& View::cursors() const
	300	{
	301	return _cursors;
	302	}
	303
cbd80f64 JH	304	const QPoint& View::hover_point() const
	305	{
	306	return _hover_point;
	307	}
	308
4b192962 JH	309	void View::normalize_layout()
4b192962 JH	310	{
38eeddea	311	const vector< shared_ptr<Trace> > traces(get_traces());
4b192962 JH	312
4b192962 JH	313	int v_min = INT_MAX;
38eeddea JH	314	BOOST_FOREACH(const shared_ptr<Trace> t, traces)
38eeddea JH	315	v_min = min(t->get_v_offset(), v_min);
4b192962 JH	316
4b192962 JH	317	const int delta = -min(v_min, 0);
38eeddea JH	318	BOOST_FOREACH(shared_ptr<Trace> t, traces)
38eeddea JH	319	t->set_v_offset(t->get_v_offset() + delta);
4b192962 JH	320
	321	verticalScrollBar()->setSliderPosition(_v_offset + delta);
	322	v_scroll_value_changed(verticalScrollBar()->sliderPosition());
	323	}
	324
9cef9567 JH	325	void View::update_viewport()
	326	{
	327	assert(_viewport);
	328	_viewport->update();
	329	}
	330
f25770e2 JH	331	void View::get_scroll_layout(double &length, double &offset) const
f25770e2 JH	332	{
1b1ec774	333	const shared_ptr<data::SignalData> sig_data = _session.get_data();
333d5bbc	334	if (!sig_data)
f25770e2 JH	335	return;
f25770e2 JH	336
9d28da5a	337	length = _data_length / (sig_data->samplerate() * _scale);
f25770e2 JH	338	offset = _offset / _scale;
	339	}
	340
d1e7d82c JH	341	void View::set_zoom(double scale, int offset)
	342	{
	343	const double cursor_offset = _offset + _scale * offset;
	344	const double new_scale = max(min(scale, MaxScale), MinScale);
	345	const double new_offset = cursor_offset - new_scale * offset;
	346	set_scale_offset(new_scale, new_offset);
	347	}
	348
cdf7bea7	349	void View::update_scroll()
adb4b10c JH	350	{
	351	assert(_viewport);
	352
	353	const QSize areaSize = _viewport->size();
	354
	355	// Set the horizontal scroll bar
	356	double length = 0, offset = 0;
f25770e2 JH	357	get_scroll_layout(length, offset);
f25770e2 JH	358	length = max(length - areaSize.width(), 0.0);
adb4b10c	359
b4ef7f2a	360	horizontalScrollBar()->setPageStep(areaSize.width() / 2);
f25770e2	361
528bd8a1 JH	362	_updating_scroll = true;
528bd8a1 JH	363
333d5bbc	364	if (length < MaxScrollValue) {
f25770e2 JH	365	horizontalScrollBar()->setRange(0, length);
	366	horizontalScrollBar()->setSliderPosition(offset);
	367	} else {
	368	horizontalScrollBar()->setRange(0, MaxScrollValue);
	369	horizontalScrollBar()->setSliderPosition(
	370	_offset * MaxScrollValue / (_scale * length));
	371	}
adb4b10c	372
528bd8a1 JH	373	_updating_scroll = false;
528bd8a1 JH	374
adb4b10c JH	375	// Set the vertical scrollbar
	376	verticalScrollBar()->setPageStep(areaSize.height());
	377	verticalScrollBar()->setRange(0,
4b192962 JH	378	_viewport->get_total_height() + SignalMargin -
4b192962 JH	379	areaSize.height());
adb4b10c JH	380	}
adb4b10c JH	381
d7c0ca4a JH	382	void View::update_layout()
d7c0ca4a JH	383	{
a6c1726e JH	384	setViewportMargins(_header->sizeHint().width(),
a6c1726e JH	385	_ruler->sizeHint().height(), 0, 0);
d7c0ca4a JH	386	_ruler->setGeometry(_viewport->x(), 0,
	387	_viewport->width(), _viewport->y());
	388	_header->setGeometry(0, _viewport->y(),
	389	_viewport->x(), _viewport->height());
	390	update_scroll();
	391	}
	392
38eeddea JH	393	bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a,
	394	const shared_ptr<Trace> &b)
	395	{
	396	assert(a);
	397	assert(b);
	398	return a->get_v_offset() < b->get_v_offset();
	399	}
	400
cbd80f64 JH	401	bool View::eventFilter(QObject object, QEvent event)
	402	{
	403	const QEvent::Type type = event->type();
333d5bbc	404	if (type == QEvent::MouseMove) {
cbd80f64 JH	405
cbd80f64 JH	406	const QMouseEvent const mouse_event = (QMouseEvent)event;
333d5bbc	407	if (object == _viewport)
cbd80f64	408	_hover_point = mouse_event->pos();
333d5bbc	409	else if (object == _ruler)
cbd80f64	410	_hover_point = QPoint(mouse_event->x(), 0);
333d5bbc	411	else if (object == _header)
cbd80f64 JH	412	_hover_point = QPoint(0, mouse_event->y());
	413	else
	414	_hover_point = QPoint(-1, -1);
	415
	416	hover_point_changed();
	417
333d5bbc	418	} else if (type == QEvent::Leave) {
cbd80f64 JH	419	_hover_point = QPoint(-1, -1);
	420	hover_point_changed();
	421	}
	422
	423	return QObject::eventFilter(object, event);
	424	}
	425
cdf7bea7	426	bool View::viewportEvent(QEvent *e)
adb4b10c JH	427	{
	428	switch(e->type()) {
	429	case QEvent::Paint:
	430	case QEvent::MouseButtonPress:
	431	case QEvent::MouseButtonRelease:
	432	case QEvent::MouseButtonDblClick:
	433	case QEvent::MouseMove:
	434	case QEvent::Wheel:
	435	return false;
	436
	437	default:
	438	return QAbstractScrollArea::viewportEvent(e);
	439	}
	440	}
	441
e314eca4	442	void View::resizeEvent(QResizeEvent*)
adb4b10c	443	{
d7c0ca4a	444	update_layout();
adb4b10c JH	445	}
adb4b10c JH	446
b16907d3	447	void View::h_scroll_value_changed(int value)
adb4b10c	448	{
528bd8a1 JH	449	if (_updating_scroll)
	450	return;
	451
f25770e2	452	const int range = horizontalScrollBar()->maximum();
333d5bbc	453	if (range < MaxScrollValue)
f25770e2 JH	454	_offset = _scale * value;
	455	else {
	456	double length = 0, offset;
	457	get_scroll_layout(length, offset);
	458	_offset = _scale * length * value / MaxScrollValue;
	459	}
	460
ccdd3ef5	461	_ruler->update();
adb4b10c JH	462	_viewport->update();
	463	}
	464
cdf7bea7	465	void View::v_scroll_value_changed(int value)
adb4b10c JH	466	{
adb4b10c JH	467	_v_offset = value;
1d8dca91	468	_header->update();
adb4b10c JH	469	_viewport->update();
	470	}
	471
69dd2b03 JH	472	void View::signals_changed()
69dd2b03 JH	473	{
ef8311a4	474	int offset = SignalMargin + SignalHeight;
01fd3263 JH	475	const vector< shared_ptr<Trace> > traces(get_traces());
	476	BOOST_FOREACH(shared_ptr<Trace> t, traces) {
	477	t->set_view(this);
01fd3263	478	t->set_v_offset(offset);
ef8311a4 JH	479	offset += SignalHeight + 2 * SignalMargin;
	480	}
	481
a6c1726e	482	update_layout();
ef8311a4	483	normalize_layout();
69dd2b03 JH	484	}
69dd2b03 JH	485
cdf7bea7	486	void View::data_updated()
adb4b10c JH	487	{
	488	// Get the new data length
	489	_data_length = 0;
1b1ec774	490	shared_ptr<data::Logic> sig_data = _session.get_data();
333d5bbc	491	if (sig_data) {
1b1ec774	492	deque< shared_ptr<data::LogicSnapshot> > &snapshots =
adb4b10c	493	sig_data->get_snapshots();
1b1ec774	494	BOOST_FOREACH(shared_ptr<data::LogicSnapshot> s, snapshots)
333d5bbc	495	if (s)
adb4b10c JH	496	_data_length = max(_data_length,
	497	s->get_sample_count());
	498	}
	499
	500	// Update the scroll bars
	501	update_scroll();
	502
	503	// Repaint the view
	504	_viewport->update();
	505	}
cdf7bea7	506
ca4ec3ea JH	507	void View::marker_time_changed()
	508	{
	509	_ruler->update();
	510	_viewport->update();
	511	}
	512
07204819	513	void View::on_signals_moved()
54401bbb	514	{
07204819 JH	515	update_scroll();
07204819 JH	516	signals_moved();
54401bbb JH	517	}
54401bbb JH	518
d7c0ca4a JH	519	void View::on_geometry_updated()
	520	{
	521	update_layout();
	522	}
	523
cdf7bea7 JH	524	} // namespace view
cdf7bea7 JH	525	} // namespace pv