// SPDX-License-Identifier: GPL-2.0
#include "profile-widget/profilewidget2.h"
#include "qt-models/diveplotdatamodel.h"
#include "core/event.h"
#include "core/subsurface-string.h"
#include "core/qthelper.h"
#include "core/profile.h"
#include "core/settings/qPrefDisplay.h"
#include "core/settings/qPrefTechnicalDetails.h"
#include "core/settings/qPrefPartialPressureGas.h"
#include "profile-widget/diveeventitem.h"
#include "profile-widget/divetextitem.h"
#include "profile-widget/divetooltipitem.h"
#include "profile-widget/divehandler.h"
#include "core/planner.h"
#include "core/device.h"
#include "profile-widget/ruleritem.h"
#include "profile-widget/tankitem.h"
#include "core/pref.h"
#include "qt-models/diveplannermodel.h"
#include "qt-models/models.h"
#include "core/errorhelper.h"
#ifndef SUBSURFACE_MOBILE
#include "desktop-widgets/simplewidgets.h"
#include "commands/command.h"
#include "core/gettextfromc.h"
#include "core/imagedownloader.h"
#endif

#include <QScrollBar>
#include <QtCore/qmath.h>
#include <QMessageBox>
#include <QInputDialog>
#include <QDebug>
#include <QWheelEvent>
#include <QMenu>
#include <QMimeData>
#include <QElapsedTimer>

#ifndef QT_NO_DEBUG
#include <QTableView>
#endif

#define PP_GRAPHS_ENABLED (prefs.pp_graphs.po2 || prefs.pp_graphs.pn2 || prefs.pp_graphs.phe)

/* This is the global 'Item position' variable.
 * it should tell you where to position things up
 * on the canvas.
 *
 * please, please, please, use this instead of
 * hard coding the item on the scene with a random
 * value.
 */
const static struct ItemPos {
	struct Pos {
		QPointF on;
		QPointF off;
	};
	struct Axis {
		Pos pos;
		QLineF shrinked;
		QLineF expanded;
		QLineF intermediate;
	};
	Pos dcLabel;
	Pos tankBar;
	Axis depth;
	Axis partialPressure;
	Axis partialPressureTissue;
	Axis partialPressureWithTankBar;
	Axis percentage;
	Axis percentageWithTankBar;
	Axis time;
	Axis cylinder;
	Axis temperature;
	Axis temperatureAll;
	Axis heartBeat;
	Axis heartBeatWithTankBar;
	ItemPos();
} itemPos;

// Constant describing at which z-level the thumbnails are located.
// We might add more constants here for easier customability.
#ifndef SUBSURFACE_MOBILE
static const double thumbnailBaseZValue = 100.0;
#endif

template<typename T, class... Args>
T *ProfileWidget2::createItem(const DiveCartesianAxis &vAxis, int vColumn, int z, Args&&... args)
{
	T *res = new T(*dataModel, *timeAxis, DivePlotDataModel::TIME, vAxis, vColumn,
		       std::forward<Args>(args)...);
	res->setZValue(static_cast<double>(z));
	profileItems.push_back(res);
	return res;
}

ProfileWidget2::ProfileWidget2(DivePlannerPointsModel *plannerModelIn, QWidget *parent) : QGraphicsView(parent),
	currentState(INVALID),
	dataModel(new DivePlotDataModel(this)),
	plannerModel(plannerModelIn),
	zoomLevel(0),
	zoomFactor(1.15),
	isGrayscale(false),
	printMode(false),
	background(new DivePixmapItem()),
	backgroundFile(":poster-icon"),
#ifndef SUBSURFACE_MOBILE
	toolTipItem(new ToolTipItem()),
#endif
	profileYAxis(new DepthAxis(this)),
	gasYAxis(new PartialGasPressureAxis(*dataModel, this)),
	temperatureAxis(new TemperatureAxis(this)),
	timeAxis(new TimeAxis(this)),
	diveProfileItem(createItem<DiveProfileItem>(*profileYAxis, DivePlotDataModel::DEPTH, 0)),
	temperatureItem(createItem<DiveTemperatureItem>(*temperatureAxis, DivePlotDataModel::TEMPERATURE, 1)),
	meanDepthItem(createItem<DiveMeanDepthItem>(*profileYAxis, DivePlotDataModel::INSTANT_MEANDEPTH, 1)),
	cylinderPressureAxis(new DiveCartesianAxis(this)),
	gasPressureItem(createItem<DiveGasPressureItem>(*cylinderPressureAxis, DivePlotDataModel::TEMPERATURE, 1)),
	diveComputerText(new DiveTextItem()),
	reportedCeiling(createItem<DiveReportedCeiling>(*profileYAxis, DivePlotDataModel::CEILING, 1)),
	pn2GasItem(createPPGas(DivePlotDataModel::PN2, PN2, PN2_ALERT, NULL, &prefs.pp_graphs.pn2_threshold)),
	pheGasItem(createPPGas(DivePlotDataModel::PHE, PHE, PHE_ALERT, NULL, &prefs.pp_graphs.phe_threshold)),
	po2GasItem(createPPGas(DivePlotDataModel::PO2, PO2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	o2SetpointGasItem(createPPGas(DivePlotDataModel::O2SETPOINT, O2SETPOINT, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	ccrsensor1GasItem(createPPGas(DivePlotDataModel::CCRSENSOR1, CCRSENSOR1, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	ccrsensor2GasItem(createPPGas(DivePlotDataModel::CCRSENSOR2, CCRSENSOR2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	ccrsensor3GasItem(createPPGas(DivePlotDataModel::CCRSENSOR3, CCRSENSOR3, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	ocpo2GasItem(createPPGas(DivePlotDataModel::SCR_OC_PO2, SCR_OCPO2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max)),
	diveCeiling(createItem<DiveCalculatedCeiling>(*profileYAxis, DivePlotDataModel::CEILING, 1)),
	decoModelParameters(new DiveTextItem()),
#ifndef SUBSURFACE_MOBILE
	heartBeatAxis(new DiveCartesianAxis(this)),
	heartBeatItem(createItem<DiveHeartrateItem>(*heartBeatAxis, DivePlotDataModel::HEARTBEAT, 1)),
	percentageAxis(new DiveCartesianAxis(this)),
	mouseFollowerVertical(new DiveLineItem()),
	mouseFollowerHorizontal(new DiveLineItem()),
	rulerItem(new RulerItem2()),
#endif
	tankItem(new TankItem(*timeAxis)),
	shouldCalculateMax(true),
	fontPrintScale(1.0)
{
	init_plot_info(&plotInfo);

	setupSceneAndFlags();
	setupItemOnScene();
	addItemsToScene();
	scene()->installEventFilter(this);
#ifndef SUBSURFACE_MOBILE
	setAcceptDrops(true);

	addActionShortcut(Qt::Key_Escape, &ProfileWidget2::keyEscAction);
	addActionShortcut(Qt::Key_Delete, &ProfileWidget2::keyDeleteAction);
	addActionShortcut(Qt::Key_Up, &ProfileWidget2::keyUpAction);
	addActionShortcut(Qt::Key_Down, &ProfileWidget2::keyDownAction);
	addActionShortcut(Qt::Key_Left, &ProfileWidget2::keyLeftAction);
	addActionShortcut(Qt::Key_Right, &ProfileWidget2::keyRightAction);

	connect(Thumbnailer::instance(), &Thumbnailer::thumbnailChanged, this, &ProfileWidget2::updateThumbnail, Qt::QueuedConnection);
	connect(&diveListNotifier, &DiveListNotifier::picturesRemoved, this, &ProfileWidget2::picturesRemoved);
	connect(&diveListNotifier, &DiveListNotifier::picturesAdded, this, &ProfileWidget2::picturesAdded);
	connect(&diveListNotifier, &DiveListNotifier::cylinderEdited, this, &ProfileWidget2::profileChanged);
	connect(&diveListNotifier, &DiveListNotifier::eventsChanged, this, &ProfileWidget2::profileChanged);
	connect(&diveListNotifier, &DiveListNotifier::pictureOffsetChanged, this, &ProfileWidget2::pictureOffsetChanged);
	connect(&diveListNotifier, &DiveListNotifier::divesChanged, this, &ProfileWidget2::divesChanged);
	connect(&diveListNotifier, &DiveListNotifier::deviceEdited, this, &ProfileWidget2::replot);
#endif // SUBSURFACE_MOBILE

#if !defined(QT_NO_DEBUG) && defined(SHOW_PLOT_INFO_TABLE)
	QTableView *diveDepthTableView = new QTableView();
	diveDepthTableView->setModel(dataModel);
	diveDepthTableView->show();
#endif

	auto tec = qPrefTechnicalDetails::instance();
	connect(tec, &qPrefTechnicalDetails::calcalltissuesChanged           , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::calcceilingChanged              , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::gflowChanged                    , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::gfhighChanged                   , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::dcceilingChanged                , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::eadChanged                      , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::calcceiling3mChanged            , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::modChanged                      , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::calcndlttsChanged               , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::hrgraphChanged                  , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::rulergraphChanged               , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::show_sacChanged                 , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::zoomed_plotChanged              , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::show_pictures_in_profileChanged , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::tankbarChanged                  , this, &ProfileWidget2::actionRequestedReplot);
	connect(tec, &qPrefTechnicalDetails::percentagegraphChanged          , this, &ProfileWidget2::actionRequestedReplot);

	auto pp_gas = qPrefPartialPressureGas::instance();
	connect(pp_gas, &qPrefPartialPressureGas::pheChanged, this, &ProfileWidget2::actionRequestedReplot);
	connect(pp_gas, &qPrefPartialPressureGas::pn2Changed, this, &ProfileWidget2::actionRequestedReplot);
	connect(pp_gas, &qPrefPartialPressureGas::po2Changed, this, &ProfileWidget2::actionRequestedReplot);
}

ProfileWidget2::~ProfileWidget2()
{
	free_plot_info_data(&plotInfo);
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::addActionShortcut(const Qt::Key shortcut, void (ProfileWidget2::*slot)())
{
	QAction *action = new QAction(this);
	action->setShortcut(shortcut);
	action->setShortcutContext(Qt::WindowShortcut);
	addAction(action);
	connect(action, &QAction::triggered, this, slot);
	actionsForKeys[shortcut] = action;
}
#endif // SUBSURFACE_MOBILE

void ProfileWidget2::addItemsToScene()
{
	scene()->addItem(background);
	scene()->addItem(profileYAxis);
	scene()->addItem(gasYAxis);
	scene()->addItem(temperatureAxis);
	scene()->addItem(timeAxis);
	scene()->addItem(cylinderPressureAxis);
	scene()->addItem(diveComputerText);
	scene()->addItem(tankItem);
	scene()->addItem(decoModelParameters);
#ifndef SUBSURFACE_MOBILE
	scene()->addItem(toolTipItem);
	scene()->addItem(percentageAxis);
	scene()->addItem(heartBeatAxis);
	scene()->addItem(rulerItem);
	scene()->addItem(rulerItem->sourceNode());
	scene()->addItem(rulerItem->destNode());
	scene()->addItem(mouseFollowerHorizontal);
	scene()->addItem(mouseFollowerVertical);
	QPen pen(QColor(Qt::red).lighter());
	pen.setWidth(0);
	mouseFollowerHorizontal->setPen(pen);
	mouseFollowerVertical->setPen(pen);
#endif
	for (AbstractProfilePolygonItem *item: profileItems)
		scene()->addItem(item);
}

void ProfileWidget2::setupItemOnScene()
{
	background->setZValue(9999);
#ifndef SUBSURFACE_MOBILE
	toolTipItem->setZValue(9998);
	toolTipItem->setTimeAxis(timeAxis);
	rulerItem->setZValue(9997);
#endif
	tankItem->setZValue(100);

	profileYAxis->setOrientation(DiveCartesianAxis::TopToBottom);
	profileYAxis->setMinimum(0);
	profileYAxis->setTickInterval(M_OR_FT(10, 30));
	profileYAxis->setTickSize(0.5);
	profileYAxis->setLineSize(96);

	timeAxis->setLineSize(92);
	timeAxis->setTickSize(-0.5);

	gasYAxis->setOrientation(DiveCartesianAxis::BottomToTop);
	gasYAxis->setTickInterval(1);
	gasYAxis->setTickSize(1);
	gasYAxis->setMinimum(0);
	gasYAxis->setFontLabelScale(0.7);
	gasYAxis->setLineSize(96);

#ifndef SUBSURFACE_MOBILE
	heartBeatAxis->setOrientation(DiveCartesianAxis::BottomToTop);
	heartBeatAxis->setTickSize(0.2);
	heartBeatAxis->setTickInterval(10);
	heartBeatAxis->setFontLabelScale(0.7);
	heartBeatAxis->setLineSize(96);

	percentageAxis->setOrientation(DiveCartesianAxis::BottomToTop);
	percentageAxis->setTickSize(0.2);
	percentageAxis->setTickInterval(10);
	percentageAxis->setFontLabelScale(0.7);
	percentageAxis->setLineSize(96);
#endif

	temperatureAxis->setOrientation(DiveCartesianAxis::BottomToTop);
	temperatureAxis->setTickSize(2);
	temperatureAxis->setTickInterval(300);

	cylinderPressureAxis->setOrientation(DiveCartesianAxis::BottomToTop);
	cylinderPressureAxis->setTickSize(2);
	cylinderPressureAxis->setTickInterval(30000);


	diveComputerText->setAlignment(Qt::AlignRight | Qt::AlignTop);
	diveComputerText->setBrush(getColor(TIME_TEXT, isGrayscale));

#ifndef SUBSURFACE_MOBILE
	rulerItem->setAxis(timeAxis, profileYAxis);
#endif
	// show the deco model parameters at the top in the center
	decoModelParameters->setY(0);
	decoModelParameters->setX(50);
	decoModelParameters->setBrush(getColor(PRESSURE_TEXT));
	decoModelParameters->setAlignment(Qt::AlignHCenter | Qt::AlignBottom);
#ifndef SUBSURFACE_MOBILE
	for (int i = 0; i < 16; i++) {
		DiveCalculatedTissue *tissueItem = createItem<DiveCalculatedTissue>(*profileYAxis, DivePlotDataModel::TISSUE_1 + i, i + 1);
		allTissues.append(tissueItem);
		DivePercentageItem *percentageItem = createItem<DivePercentageItem>(*percentageAxis, DivePlotDataModel::PERCENTAGE_1 + i, i + 1, i);
		allPercentages.append(percentageItem);
	}
#endif

#ifndef SUBSURFACE_MOBILE

	// Visibility Connections
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::pheChanged, pheGasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::po2Changed, po2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::pn2Changed, pn2GasItem, &PartialPressureGasItem::setVisible);

	// because it was using a wrong settings.
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_setpointChanged, o2SetpointGasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_scr_ocpo2Changed, ocpo2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensorsChanged, ccrsensor1GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensorsChanged, ccrsensor2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensorsChanged, ccrsensor3GasItem, &PartialPressureGasItem::setVisible);

	heartBeatAxis->setTextVisible(true);
	heartBeatAxis->setLinesVisible(true);
	percentageAxis->setTextVisible(true);
	percentageAxis->setLinesVisible(true);
#endif
	temperatureAxis->setTextVisible(false);
	temperatureAxis->setLinesVisible(false);
	cylinderPressureAxis->setTextVisible(false);
	cylinderPressureAxis->setLinesVisible(false);
	timeAxis->setLinesVisible(true);
	profileYAxis->setLinesVisible(true);
	gasYAxis->setZValue(timeAxis->zValue() + 1);
}

void ProfileWidget2::replot()
{
	plotDive(d, dc, false);
}

PartialPressureGasItem *ProfileWidget2::createPPGas(int column, color_index_t color, color_index_t colorAlert,
						    const double *thresholdSettingsMin, const double *thresholdSettingsMax)
{
	PartialPressureGasItem *item = createItem<PartialPressureGasItem>(*gasYAxis, column, 99);
	item->setThresholdSettingsKey(thresholdSettingsMin, thresholdSettingsMax);
	item->setColors(getColor(color, isGrayscale), getColor(colorAlert, isGrayscale));
	return item;
}

ItemPos::ItemPos()
{
	// Scene is *always* (double) 100 / 100.
	// Background Config
	/* Much probably a better math is needed here.
	 * good thing is that we only need to change the
	 * Axis and everything else is auto-adjusted.*
	 */

	//Depth Axis Config
	depth.pos.on.setX(3);
	depth.pos.on.setY(3);
	depth.pos.off.setX(-2);
	depth.pos.off.setY(3);
	depth.expanded.setP1(QPointF(0, 0));
#ifndef SUBSURFACE_MOBILE
	depth.expanded.setP2(QPointF(0, 85));
#else
	depth.expanded.setP2(QPointF(0, 65));
#endif
	depth.shrinked.setP1(QPointF(0, 0));
	depth.shrinked.setP2(QPointF(0, 55));
	depth.intermediate.setP1(QPointF(0, 0));
	depth.intermediate.setP2(QPointF(0, 65));

	// Time Axis Config
	time.pos.on.setX(3);
#ifndef SUBSURFACE_MOBILE
	time.pos.on.setY(95);
#else
	time.pos.on.setY(89.5);
#endif
	time.pos.off.setX(3);
	time.pos.off.setY(110);
	time.expanded.setP1(QPointF(0, 0));
	time.expanded.setP2(QPointF(94, 0));

	// Partial Gas Axis Config
	partialPressure.pos.on.setX(97);
#ifndef SUBSURFACE_MOBILE
	partialPressure.pos.on.setY(75);
#else
	partialPressure.pos.on.setY(70);
#endif
	partialPressure.pos.off.setX(110);
	partialPressure.pos.off.setY(63);
	partialPressure.expanded.setP1(QPointF(0, 0));
#ifndef SUBSURFACE_MOBILE
	partialPressure.expanded.setP2(QPointF(0, 19));
#else
	partialPressure.expanded.setP2(QPointF(0, 20));
#endif
	partialPressureWithTankBar = partialPressure;
	partialPressureWithTankBar.expanded.setP2(QPointF(0, 17));
	partialPressureTissue = partialPressure;
	partialPressureTissue.pos.on.setX(97);
	partialPressureTissue.pos.on.setY(65);
	partialPressureTissue.expanded.setP2(QPointF(0, 16));

	// cylinder axis config
	cylinder.pos.on.setX(3);
	cylinder.pos.on.setY(20);
	cylinder.pos.off.setX(-10);
	cylinder.pos.off.setY(20);
	cylinder.expanded.setP1(QPointF(0, 15));
	cylinder.expanded.setP2(QPointF(0, 50));
	cylinder.shrinked.setP1(QPointF(0, 0));
	cylinder.shrinked.setP2(QPointF(0, 20));
	cylinder.intermediate.setP1(QPointF(0, 0));
	cylinder.intermediate.setP2(QPointF(0, 20));

	// Temperature axis config
	temperature.pos.on.setX(3);
	temperature.pos.off.setX(-10);
	temperature.pos.off.setY(40);
	temperature.expanded.setP1(QPointF(0, 20));
	temperature.expanded.setP2(QPointF(0, 33));
	temperature.shrinked.setP1(QPointF(0, 2));
	temperature.shrinked.setP2(QPointF(0, 12));
#ifndef SUBSURFACE_MOBILE
	temperature.pos.on.setY(60);
	temperatureAll.pos.on.setY(51);
	temperature.intermediate.setP1(QPointF(0, 2));
	temperature.intermediate.setP2(QPointF(0, 12));
#else
	temperature.pos.on.setY(51);
	temperatureAll.pos.on.setY(47);
	temperature.intermediate.setP1(QPointF(0, 2));
	temperature.intermediate.setP2(QPointF(0, 12));
#endif

	// Heart rate axis config
	heartBeat.pos.on.setX(3);
	heartBeat.pos.on.setY(82);
	heartBeat.expanded.setP1(QPointF(0, 0));
	heartBeat.expanded.setP2(QPointF(0, 10));
	heartBeatWithTankBar = heartBeat;
	heartBeatWithTankBar.expanded.setP2(QPointF(0, 7));

	// Percentage axis config
	percentage.pos.on.setX(3);
	percentage.pos.on.setY(80);
	percentage.expanded.setP1(QPointF(0, 0));
	percentage.expanded.setP2(QPointF(0, 15));
	percentageWithTankBar = percentage;
	percentageWithTankBar.expanded.setP2(QPointF(0, 11.9));

	dcLabel.on.setX(3);
	dcLabel.on.setY(100);
	dcLabel.off.setX(-10);
	dcLabel.off.setY(100);

	tankBar.on.setX(0);
#ifndef SUBSURFACE_MOBILE
	tankBar.on.setY(91.95);
#else
	tankBar.on.setY(86.4);
#endif
}

void ProfileWidget2::setupSceneAndFlags()
{
	setScene(new QGraphicsScene(this));
	scene()->setSceneRect(0, 0, 100, 100);
	setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	scene()->setItemIndexMethod(QGraphicsScene::NoIndex);
	setOptimizationFlags(QGraphicsView::DontSavePainterState);
	setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
	setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
	setMouseTracking(true);
	background->setFlag(QGraphicsItem::ItemIgnoresTransformations);
}

void ProfileWidget2::resetZoom()
{
	if (!zoomLevel)
		return;
	const qreal defScale = 1.0 / qPow(zoomFactor, (qreal)zoomLevel);
	scale(defScale, defScale);
	zoomLevel = 0;
}

// Currently just one dive, but the plan is to enable All of the selected dives.
void ProfileWidget2::plotDive(const struct dive *dIn, int dcIn, bool doClearPictures, bool instant)
{
	d = dIn;
	dc = dcIn;
	if (!d) {
		setEmptyState();
		return;
	}

	QElapsedTimer measureDuration; // let's measure how long this takes us (maybe we'll turn of TTL calculation later
	measureDuration.start();
#ifdef SUBSURFACE_MOBILE
	Q_UNUSED(doClearPictures);
#endif
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel) {
		if (decoMode(false) == VPMB)
			decoModelParameters->setText(QString("VPM-B +%1").arg(prefs.vpmb_conservatism));
		else
			decoModelParameters->setText(QString("GF %1/%2").arg(prefs.gflow).arg(prefs.gfhigh));
#ifndef SUBSURFACE_MOBILE
	} else {
		struct diveplan &diveplan = plannerModel->getDiveplan();
		if (decoMode(currentState == PLAN) == VPMB)
			decoModelParameters->setText(QString("VPM-B +%1").arg(diveplan.vpmb_conservatism));
		else
			decoModelParameters->setText(QString("GF %1/%2").arg(diveplan.gflow).arg(diveplan.gfhigh));
#endif
	}

	const struct divecomputer *currentdc = get_dive_dc_const(d, dc);
	if (!currentdc || !currentdc->samples) {
		setEmptyState();
		return;
	}

	// special handling when switching from empty state
	animSpeed = instant || currentState == EMPTY || printMode ? 0 : qPrefDisplay::animation_speed();

	// restore default zoom level
	resetZoom();

#ifndef SUBSURFACE_MOBILE
	// reset some item visibility on printMode changes
	toolTipItem->setVisible(!printMode);
	rulerItem->setVisible(prefs.rulergraph && !printMode && currentState != PLAN && currentState != EDIT);
#endif
	if (currentState == EMPTY)
		setProfileState();
	updateVisibility();

	bool setpointflag = (currentdc->divemode == CCR) && prefs.pp_graphs.po2;
	bool sensorflag = setpointflag && prefs.show_ccr_sensors;
	o2SetpointGasItem->setVisible(setpointflag && prefs.show_ccr_setpoint);
	ccrsensor1GasItem->setVisible(sensorflag);
	ccrsensor2GasItem->setVisible(sensorflag && (currentdc->no_o2sensors > 1));
	ccrsensor3GasItem->setVisible(sensorflag && (currentdc->no_o2sensors > 2));
	ocpo2GasItem->setVisible((currentdc->divemode == PSCR) && prefs.show_scr_ocpo2);


	/* This struct holds all the data that's about to be plotted.
	 * I'm not sure this is the best approach ( but since we are
	 * interpolating some points of the Dive, maybe it is... )
	 * The  Calculation of the points should be done per graph,
	 * so I'll *not* calculate everything if something is not being
	 * shown.
	 */

	// create_plot_info_new() automatically frees old plot data
#ifndef SUBSURFACE_MOBILE
	// A non-null planner_ds signals to create_plot_info_new that the dive is currently planned.
	struct deco_state *planner_ds = currentState == PLAN && plannerModel ? &plannerModel->final_deco_state : nullptr;
	create_plot_info_new(d, get_dive_dc_const(d, dc), &plotInfo, !shouldCalculateMax, planner_ds);
#else
	create_plot_info_new(d, get_dive_dc_const(d, dc), &plotInfo, !shouldCalculateMax, nullptr);
#endif
	int newMaxtime = get_maxtime(&plotInfo);
	if (shouldCalculateMax || newMaxtime > maxtime)
		maxtime = newMaxtime;

	/* Only update the max. depth if it's bigger than the current ones
	 * when we are dragging the handler to plan / add dive.
	 * otherwhise, update normally.
	 */
	int newMaxDepth = get_maxdepth(&plotInfo);
	if (!shouldCalculateMax) {
		if (maxdepth < newMaxDepth) {
			maxdepth = newMaxDepth;
		}
	} else {
		maxdepth = newMaxDepth;
	}

	dataModel->setDive(plotInfo);
#ifndef SUBSURFACE_MOBILE
	toolTipItem->setPlotInfo(plotInfo);
#endif
	// It seems that I'll have a lot of boilerplate setting the model / axis for
	// each item, I'll mostly like to fix this in the future, but I'll keep at this for now.
	profileYAxis->setMaximum(maxdepth);
	profileYAxis->updateTicks();

	temperatureAxis->setMinimum(plotInfo.mintemp);
	temperatureAxis->setMaximum(plotInfo.maxtemp - plotInfo.mintemp > 2000 ? plotInfo.maxtemp : plotInfo.mintemp + 2000);

#ifndef SUBSURFACE_MOBILE
	if (plotInfo.maxhr) {
		int heartBeatAxisMin = lrint(plotInfo.minhr / 5.0 - 0.5) * 5;
		int heartBeatAxisMax, heartBeatAxisTick;
		if (plotInfo.maxhr - plotInfo.minhr < 40)
			heartBeatAxisTick = 10;
		else if (plotInfo.maxhr - plotInfo.minhr < 80)
			heartBeatAxisTick = 20;
		else if (plotInfo.maxhr - plotInfo.minhr < 100)
			heartBeatAxisTick = 25;
		else
			heartBeatAxisTick = 50;
		for (heartBeatAxisMax = heartBeatAxisMin; heartBeatAxisMax < plotInfo.maxhr; heartBeatAxisMax += heartBeatAxisTick);
		heartBeatAxis->setMinimum(heartBeatAxisMin);
		heartBeatAxis->setMaximum(heartBeatAxisMax + 1);
		heartBeatAxis->setTickInterval(heartBeatAxisTick);
		heartBeatAxis->updateTicks(HR_AXIS); // this shows the ticks
	}
	heartBeatAxis->setVisible(prefs.hrgraph && plotInfo.maxhr);

	percentageAxis->setMinimum(0);
	percentageAxis->setMaximum(100);
	percentageAxis->setVisible(false);
	percentageAxis->updateTicks(HR_AXIS);
#endif
	if (shouldCalculateMax)
		timeAxis->setMaximum(maxtime);
	int i, incr;
	static int increments[8] = { 10, 20, 30, 60, 5 * 60, 10 * 60, 15 * 60, 30 * 60 };
	/* Time markers: at most every 10 seconds, but no more than 12 markers.
	 * We start out with 10 seconds and increment up to 30 minutes,
	 * depending on the dive time.
	 * This allows for 6h dives - enough (I hope) for even the craziest
	 * divers - but just in case, for those 8h depth-record-breaking dives,
	 * we double the interval if this still doesn't get us to 12 or fewer
	 * time markers */
	i = 0;
	while (i < 7 && maxtime / increments[i] > 12)
		i++;
	incr = increments[i];
	while (maxtime / incr > 12)
		incr *= 2;
	timeAxis->setTickInterval(incr);
	timeAxis->updateTicks();
	cylinderPressureAxis->setMinimum(plotInfo.minpressure);
	cylinderPressureAxis->setMaximum(plotInfo.maxpressure);
#ifndef SUBSURFACE_MOBILE
	rulerItem->setPlotInfo(d, plotInfo);
#endif

#ifdef SUBSURFACE_MOBILE
	if (currentdc->divemode == CCR) {
		gasYAxis->setPos(itemPos.partialPressure.pos.on);
		gasYAxis->setLine(itemPos.partialPressure.expanded);

		tankItem->setVisible(false);
		pn2GasItem->setVisible(false);
		po2GasItem->setVisible(prefs.pp_graphs.po2);
		pheGasItem->setVisible(false);
		o2SetpointGasItem->setVisible(prefs.show_ccr_setpoint);
		ccrsensor1GasItem->setVisible(prefs.show_ccr_sensors);
		ccrsensor2GasItem->setVisible(prefs.show_ccr_sensors && (currentdc->no_o2sensors > 1));
		ccrsensor3GasItem->setVisible(prefs.show_ccr_sensors && (currentdc->no_o2sensors > 1));
		ocpo2GasItem->setVisible((currentdc->divemode == PSCR) && prefs.show_scr_ocpo2);
		//when no gas graph, we can show temperature
		if (!po2GasItem->isVisible() &&
		    !o2SetpointGasItem->isVisible() &&
		    !ccrsensor1GasItem->isVisible() &&
		    !ccrsensor2GasItem->isVisible() &&
		    !ccrsensor3GasItem->isVisible() &&
		    !ocpo2GasItem->isVisible())
			temperatureItem->setVisible(true);
		else
			temperatureItem->setVisible(false);
	} else {
		tankItem->setVisible(prefs.tankbar);
		gasYAxis->setPos(itemPos.partialPressure.pos.off);
		pn2GasItem->setVisible(false);
		po2GasItem->setVisible(false);
		pheGasItem->setVisible(false);
		o2SetpointGasItem->setVisible(false);
		ccrsensor1GasItem->setVisible(false);
		ccrsensor2GasItem->setVisible(false);
		ccrsensor3GasItem->setVisible(false);
		ocpo2GasItem->setVisible(false);
	}
#endif
	tankItem->setData(&plotInfo, d);

	gasYAxis->update();

	// Replot dive items
	for (AbstractProfilePolygonItem *item: profileItems)
		item->replot(d, currentState == PLAN);

	// The event items are a bit special since we don't know how many events are going to
	// exist on a dive, so I cant create cache items for that. that's why they are here
	// while all other items are up there on the constructor.
	qDeleteAll(eventItems);
	eventItems.clear();
	struct event *event = currentdc->events;
	struct gasmix lastgasmix = get_gasmix_at_time(d, get_dive_dc_const(d, dc), duration_t{1});

	while (event) {
#ifndef SUBSURFACE_MOBILE
		// if print mode is selected only draw headings, SP change, gas events or bookmark event
		if (printMode) {
			if (empty_string(event->name) ||
			    !(strcmp(event->name, "heading") == 0 ||
			      (same_string(event->name, "SP change") && event->time.seconds == 0) ||
			      event_is_gaschange(event) ||
			      event->type == SAMPLE_EVENT_BOOKMARK)) {
				event = event->next;
				continue;
			}
		}
#else
		// printMode is always selected for SUBSURFACE_MOBILE due to font problems
		// BUT events are wanted.
#endif
		DiveEventItem *item = new DiveEventItem(d, event, lastgasmix, dataModel, timeAxis, profileYAxis, animSpeed, getFontPrintScale());
		item->setZValue(2);
		scene()->addItem(item);
		eventItems.push_back(item);
		if (event_is_gaschange(event))
			lastgasmix = get_gasmix_from_event(d, event);
		event = event->next;
	}

	// Only set visible the events that should be visible
	Q_FOREACH (DiveEventItem *event, eventItems) {
		event->setVisible(!event->shouldBeHidden());
	}
	QString dcText = get_dc_nickname(currentdc);
	if (dcText == "planned dive")
		dcText = tr("Planned dive");
	else if (dcText == "manually added dive")
		dcText = tr("Manually added dive");
	else if (dcText.isEmpty())
		dcText = tr("Unknown dive computer");
#ifndef SUBSURFACE_MOBILE
	int nr;
	if ((nr = number_of_computers(d)) > 1)
		dcText += tr(" (#%1 of %2)").arg(dc + 1).arg(nr);
#endif
	diveComputerText->setText(dcText);

#ifndef SUBSURFACE_MOBILE
	if ((currentState == EDIT || currentState == PLAN) && plannerModel) {
		repositionDiveHandlers();
		plannerModel->deleteTemporaryPlan();
	}
	if (doClearPictures)
		clearPictures();
	else
		plotPicturesInternal(d, instant);

	toolTipItem->refresh(d, mapToScene(mapFromGlobal(QCursor::pos())), currentState == PLAN);
#endif

	// OK, how long did this take us? Anything above the second is way too long,
	// so if we are calculation TTS / NDL then let's force that off.
	qint64 elapsedTime = measureDuration.elapsed();
	if (verbose)
		qDebug() << "Profile calculation for dive " << d->number << "took" << elapsedTime << "ms" << " -- calculated ceiling preference is" << prefs.calcceiling;
	if (elapsedTime > 1000 && prefs.calcndltts) {
		qPrefTechnicalDetails::set_calcndltts(false);
		report_error(qPrintable(tr("Show NDL / TTS was disabled because of excessive processing time")));
	}
}

void ProfileWidget2::divesChanged(const QVector<dive *> &dives, DiveField field)
{
	// If the mode of the currently displayed dive changed, replot
	if (field.mode &&
	    std::any_of(dives.begin(), dives.end(),
			[id = displayed_dive.id] (const dive *d)
			{ return d->id == id; } ))
		replot();
}

void ProfileWidget2::actionRequestedReplot(bool)
{
	settingsChanged();
}

void ProfileWidget2::updateAxes()
{
#ifndef SUBSURFACE_MOBILE
	gasYAxis->update();	// Initialize ticks of partial pressure graph
	if ((prefs.percentagegraph||prefs.hrgraph) && PP_GRAPHS_ENABLED) {
		profileYAxis->animateChangeLine(itemPos.depth.shrinked);
		temperatureAxis->setPos(itemPos.temperatureAll.pos.on);
		temperatureAxis->animateChangeLine(itemPos.temperature.shrinked);
		cylinderPressureAxis->animateChangeLine(itemPos.cylinder.shrinked);

		if (prefs.tankbar) {
			percentageAxis->setPos(itemPos.percentageWithTankBar.pos.on);
			percentageAxis->animateChangeLine(itemPos.percentageWithTankBar.expanded);
			heartBeatAxis->setPos(itemPos.heartBeatWithTankBar.pos.on);
			heartBeatAxis->animateChangeLine(itemPos.heartBeatWithTankBar.expanded);
		} else {
			percentageAxis->setPos(itemPos.percentage.pos.on);
			percentageAxis->animateChangeLine(itemPos.percentage.expanded);
			heartBeatAxis->setPos(itemPos.heartBeat.pos.on);
			heartBeatAxis->animateChangeLine(itemPos.heartBeat.expanded);
		}
		gasYAxis->setPos(itemPos.partialPressureTissue.pos.on);
		gasYAxis->animateChangeLine(itemPos.partialPressureTissue.expanded);
	} else if (PP_GRAPHS_ENABLED || prefs.hrgraph || prefs.percentagegraph) {
		profileYAxis->animateChangeLine(itemPos.depth.intermediate);
		temperatureAxis->setPos(itemPos.temperature.pos.on);
		temperatureAxis->animateChangeLine(itemPos.temperature.intermediate);
		cylinderPressureAxis->animateChangeLine(itemPos.cylinder.intermediate);
		if (prefs.tankbar) {
			percentageAxis->setPos(itemPos.percentageWithTankBar.pos.on);
			percentageAxis->animateChangeLine(itemPos.percentageWithTankBar.expanded);
			gasYAxis->setPos(itemPos.partialPressureWithTankBar.pos.on);
			gasYAxis->animateChangeLine(itemPos.partialPressureWithTankBar.expanded);
			heartBeatAxis->setPos(itemPos.heartBeatWithTankBar.pos.on);
			heartBeatAxis->animateChangeLine(itemPos.heartBeatWithTankBar.expanded);
		} else {
			gasYAxis->setPos(itemPos.partialPressure.pos.on);
			gasYAxis->animateChangeLine(itemPos.partialPressure.expanded);
			percentageAxis->setPos(itemPos.percentage.pos.on);
			percentageAxis->animateChangeLine(itemPos.percentage.expanded);
			heartBeatAxis->setPos(itemPos.heartBeat.pos.on);
			heartBeatAxis->animateChangeLine(itemPos.heartBeat.expanded);
		}
	} else {
#else
	{
#endif
		profileYAxis->animateChangeLine(itemPos.depth.expanded);
		if (prefs.tankbar) {
			temperatureAxis->setPos(itemPos.temperatureAll.pos.on);
		} else {
			temperatureAxis->setPos(itemPos.temperature.pos.on);
		}
		temperatureAxis->animateChangeLine(itemPos.temperature.expanded);
		cylinderPressureAxis->animateChangeLine(itemPos.cylinder.expanded);
	}
}

void ProfileWidget2::settingsChanged()
{
	updateAxes();
	tankItem->setVisible(prefs.tankbar);
	replot();
}

void ProfileWidget2::resizeEvent(QResizeEvent *event)
{
	QGraphicsView::resizeEvent(event);
	fitInView(sceneRect(), Qt::IgnoreAspectRatio);
	fixBackgroundPos();
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::mousePressEvent(QMouseEvent *event)
{
	if (zoomLevel)
		return;
	QGraphicsView::mousePressEvent(event);
	if (currentState == PLAN || currentState == EDIT)
		shouldCalculateMax = false;
}

void ProfileWidget2::divePlannerHandlerClicked()
{
	if (zoomLevel)
		return;
	shouldCalculateMax = false;
}

void ProfileWidget2::divePlannerHandlerReleased()
{
	if (zoomLevel)
		return;
	shouldCalculateMax = true;
	replot();
}

void ProfileWidget2::mouseReleaseEvent(QMouseEvent *event)
{
	if (zoomLevel)
		return;
	QGraphicsView::mouseReleaseEvent(event);
	if (currentState == PLAN || currentState == EDIT) {
		shouldCalculateMax = true;
		replot();
	}
}
#endif

void ProfileWidget2::fixBackgroundPos()
{
	static QPixmap toBeScaled(backgroundFile);
	if (currentState != EMPTY)
		return;
	QPixmap p = toBeScaled.scaledToHeight(viewport()->height() - 40, Qt::SmoothTransformation);
	int x = viewport()->width() / 2 - p.width() / 2;
	int y = viewport()->height() / 2 - p.height() / 2;
	background->setPixmap(p);
	background->setX(mapToScene(x, 0).x());
	background->setY(mapToScene(y, 20).y());
}

void ProfileWidget2::scale(qreal sx, qreal sy)
{
	QGraphicsView::scale(sx, sy);

#ifndef SUBSURFACE_MOBILE
	// Since the zoom level changed, adjust the duration bars accordingly.
	// We want to grow/shrink the length, but not the height and pen.
	for (PictureEntry &p: pictures)
		updateDurationLine(p);

	// Since we created new duration lines, we have to update the order in which the thumbnails is painted.
	updateThumbnailPaintOrder();
#endif
}

bool ProfileWidget2::isPointOutOfBoundaries(const QPointF &point) const
{
	double xpos = timeAxis->valueAt(point);
	double ypos = profileYAxis->valueAt(point);
	return xpos > timeAxis->maximum() ||
	       xpos < timeAxis->minimum() ||
	       ypos > profileYAxis->maximum() ||
	       ypos < profileYAxis->minimum();
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::wheelEvent(QWheelEvent *event)
{
	if (currentState == EMPTY)
		return;
	QPoint toolTipPos = mapFromScene(toolTipItem->pos());
	if (event->buttons() == Qt::LeftButton)
		return;
	if (event->angleDelta().y() > 0 && zoomLevel < 20) {
		scale(zoomFactor, zoomFactor);
		zoomLevel++;
	} else if (event->angleDelta().y() < 0 && zoomLevel > 0) {
		// Zooming out
		scale(1.0 / zoomFactor, 1.0 / zoomFactor);
		zoomLevel--;
	}
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
	scrollViewTo(event->position().toPoint());
#else
	scrollViewTo(event->pos());
#endif
	toolTipItem->setPos(mapToScene(toolTipPos));
}

void ProfileWidget2::mouseDoubleClickEvent(QMouseEvent *event)
{
	if ((currentState == PLAN || currentState == EDIT) && plannerModel) {
		QPointF mappedPos = mapToScene(event->pos());
		if (isPointOutOfBoundaries(mappedPos))
			return;

		int minutes = lrint(timeAxis->valueAt(mappedPos) / 60);
		int milimeters = lrint(profileYAxis->valueAt(mappedPos) / M_OR_FT(1, 1)) * M_OR_FT(1, 1);
		plannerModel->addStop(milimeters, minutes * 60);
	}
}

void ProfileWidget2::scrollViewTo(const QPoint &pos)
{
	/* since we cannot use translate() directly on the scene we hack on
	 * the scroll bars (hidden) functionality */
	if (!zoomLevel || currentState == EMPTY)
		return;
	QScrollBar *vs = verticalScrollBar();
	QScrollBar *hs = horizontalScrollBar();
	const qreal yRat = (qreal)pos.y() / viewport()->height();
	const qreal xRat = (qreal)pos.x() / viewport()->width();
	vs->setValue(lrint(yRat * vs->maximum()));
	hs->setValue(lrint(xRat * hs->maximum()));
}

void ProfileWidget2::mouseMoveEvent(QMouseEvent *event)
{
	QPointF pos = mapToScene(event->pos());
	toolTipItem->refresh(d, mapToScene(mapFromGlobal(QCursor::pos())), currentState == PLAN);

	if (zoomLevel == 0) {
		QGraphicsView::mouseMoveEvent(event);
	} else {
		QPoint toolTipPos = mapFromScene(toolTipItem->pos());
		scrollViewTo(event->pos());
		toolTipItem->setPos(mapToScene(toolTipPos));
	}

	qreal vValue = profileYAxis->valueAt(pos);
	qreal hValue = timeAxis->valueAt(pos);

	if (profileYAxis->maximum() >= vValue && profileYAxis->minimum() <= vValue) {
		mouseFollowerHorizontal->setPos(timeAxis->pos().x(), pos.y());
	}
	if (timeAxis->maximum() >= hValue && timeAxis->minimum() <= hValue) {
		mouseFollowerVertical->setPos(pos.x(), profileYAxis->line().y1());
	}
}

bool ProfileWidget2::eventFilter(QObject *object, QEvent *event)
{
	QGraphicsScene *s = qobject_cast<QGraphicsScene *>(object);
	if (s && event->type() == QEvent::GraphicsSceneHelp) {
		event->ignore();
		return true;
	}
	return QGraphicsView::eventFilter(object, event);
}
#endif

template <typename T>
static void hideAll(const T &container)
{
	for (auto &item: container)
		item->setVisible(false);
}

void ProfileWidget2::setEmptyState()
{
	// Then starting Empty State, move the background up.
	if (currentState == EMPTY)
		return;

#ifndef SUBSURFACE_MOBILE
	clearPictures();
#endif
	disconnectTemporaryConnections();
	setBackgroundBrush(getColor(::BACKGROUND, isGrayscale));
	dataModel->clear();
	currentState = EMPTY;

	fixBackgroundPos();
	background->setVisible(true);

	profileYAxis->setVisible(false);
	gasYAxis->setVisible(false);
	timeAxis->setVisible(false);
	temperatureAxis->setVisible(false);
	cylinderPressureAxis->setVisible(false);
	diveComputerText->setVisible(false);
	reportedCeiling->setVisible(false);
	tankItem->setVisible(false);
	pn2GasItem->setVisible(false);
	po2GasItem->setVisible(false);
	pheGasItem->setVisible(false);
	o2SetpointGasItem->setVisible(false);
	ccrsensor1GasItem->setVisible(false);
	ccrsensor2GasItem->setVisible(false);
	ccrsensor3GasItem->setVisible(false);
	ocpo2GasItem->setVisible(false);
	decoModelParameters->setVisible(false);
	diveCeiling->setVisible(false);
#ifndef SUBSURFACE_MOBILE
	toolTipItem->clearPlotInfo();
	toolTipItem->setVisible(false);
	rulerItem->setVisible(false);
	mouseFollowerHorizontal->setVisible(false);
	mouseFollowerVertical->setVisible(false);
	heartBeatAxis->setVisible(false);
	heartBeatItem->setVisible(false);
#endif
	for (AbstractProfilePolygonItem *item: profileItems)
		item->clear();

#ifndef SUBSURFACE_MOBILE
	hideAll(allTissues);
	hideAll(allPercentages);
	hideAll(handles);
#endif
	// the events will have connected slots which can fire after
	// the dive and its data have been deleted - so explictly delete
	// the DiveEventItems
	qDeleteAll(eventItems);
	eventItems.clear();
	hideAll(gases);
}

void ProfileWidget2::setProfileState(const dive *dIn, int dcIn)
{
	d = dIn;
	dc = dcIn;

	setProfileState();
}

// Update visibility of non-interactive chart features according to preferences
void ProfileWidget2::updateVisibility()
{
#ifndef SUBSURFACE_MOBILE
	pn2GasItem->setVisible(prefs.pp_graphs.pn2);
	po2GasItem->setVisible(prefs.pp_graphs.po2);
	pheGasItem->setVisible(prefs.pp_graphs.phe);

	const struct divecomputer *currentdc = d ? get_dive_dc_const(d, dc) : nullptr;
	bool setpointflag = currentdc && currentdc->divemode == CCR && prefs.pp_graphs.po2;
	bool sensorflag = setpointflag && prefs.show_ccr_sensors;
	o2SetpointGasItem->setVisible(setpointflag && prefs.show_ccr_setpoint);
	ccrsensor1GasItem->setVisible(sensorflag);
	ccrsensor2GasItem->setVisible(currentdc && sensorflag && currentdc->no_o2sensors > 1);
	ccrsensor3GasItem->setVisible(currentdc && sensorflag && currentdc->no_o2sensors > 2);
	ocpo2GasItem->setVisible(currentdc && currentdc->divemode == PSCR && prefs.show_scr_ocpo2);

	heartBeatItem->setVisible(prefs.hrgraph);
#endif
	diveCeiling->setVisible(prefs.calcceiling);
	decoModelParameters->setVisible(prefs.calcceiling);
#ifndef SUBSURFACE_MOBILE
	for (DiveCalculatedTissue *tissue: allTissues)
		tissue->setVisible(prefs.calcalltissues && prefs.calcceiling);
	for (DivePercentageItem *percentage: allPercentages)
		percentage->setVisible(prefs.percentagegraph);
#endif
	meanDepthItem->setVisible(prefs.show_average_depth);
	reportedCeiling->setVisible(prefs.dcceiling);
	tankItem->setVisible(prefs.tankbar);
}

void ProfileWidget2::setProfileState()
{
	// Then starting Empty State, move the background up.
	if (currentState == PROFILE)
		return;

	disconnectTemporaryConnections();
	/* show the same stuff that the profile shows. */

	currentState = PROFILE;
	setBackgroundBrush(getColor(::BACKGROUND, isGrayscale));

	background->setVisible(false);
	profileYAxis->setVisible(true);
	gasYAxis->setVisible(true);
	timeAxis->setVisible(true);
	temperatureAxis->setVisible(true);
	cylinderPressureAxis->setVisible(true);

	profileYAxis->setPos(itemPos.depth.pos.on);
	updateAxes();

#ifndef SUBSURFACE_MOBILE
	toolTipItem->readPos();
	toolTipItem->setVisible(true);
	rulerItem->setVisible(prefs.rulergraph);
#endif
	timeAxis->setPos(itemPos.time.pos.on);
	timeAxis->setLine(itemPos.time.expanded);

	cylinderPressureAxis->setPos(itemPos.cylinder.pos.on);

	diveComputerText->setVisible(true);
	diveComputerText->setPos(itemPos.dcLabel.on);

	tankItem->setPos(itemPos.tankBar.on);

#ifndef SUBSURFACE_MOBILE
	hideAll(handles);
	mouseFollowerHorizontal->setVisible(false);
	mouseFollowerVertical->setVisible(false);
#endif
	hideAll(gases);
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::setToolTipVisibile(bool visible)
{
	toolTipItem->setVisible(visible);
}

void ProfileWidget2::connectPlannerModel()
{
	connect(plannerModel, &DivePlannerPointsModel::dataChanged, this, &ProfileWidget2::replot);
	connect(plannerModel, &DivePlannerPointsModel::cylinderModelEdited, this, &ProfileWidget2::replot);
	connect(plannerModel, &DivePlannerPointsModel::modelReset, this, &ProfileWidget2::pointsReset);
	connect(plannerModel, &DivePlannerPointsModel::rowsInserted, this, &ProfileWidget2::pointInserted);
	connect(plannerModel, &DivePlannerPointsModel::rowsRemoved, this, &ProfileWidget2::pointsRemoved);
	connect(plannerModel, &DivePlannerPointsModel::rowsMoved, this, &ProfileWidget2::pointsMoved);
}

void ProfileWidget2::setEditState(const dive *d, int dc)
{
	if (currentState == EDIT)
		return;

	setProfileState(d, dc);
	mouseFollowerHorizontal->setVisible(true);
	mouseFollowerVertical->setVisible(true);
	mouseFollowerHorizontal->setLine(timeAxis->line());
	mouseFollowerVertical->setLine(QLineF(0, profileYAxis->pos().y(), 0, timeAxis->pos().y()));
	disconnectTemporaryConnections();
	actionsForKeys[Qt::Key_Left]->setShortcut(Qt::Key_Left);
	actionsForKeys[Qt::Key_Right]->setShortcut(Qt::Key_Right);
	actionsForKeys[Qt::Key_Up]->setShortcut(Qt::Key_Up);
	actionsForKeys[Qt::Key_Down]->setShortcut(Qt::Key_Down);
	actionsForKeys[Qt::Key_Escape]->setShortcut(Qt::Key_Escape);
	actionsForKeys[Qt::Key_Delete]->setShortcut(Qt::Key_Delete);

	connectPlannerModel();

	/* show the same stuff that the profile shows. */
	currentState = EDIT; /* enable the add state. */
	diveCeiling->setVisible(true);
	decoModelParameters->setVisible(true);
	setBackgroundBrush(QColor("#A7DCFF"));

	pointsReset();
	repositionDiveHandlers();
}

void ProfileWidget2::setPlanState(const dive *d, int dc)
{
	if (currentState == PLAN)
		return;

	setProfileState(d, dc);
	mouseFollowerHorizontal->setVisible(true);
	mouseFollowerVertical->setVisible(true);
	mouseFollowerHorizontal->setLine(timeAxis->line());
	mouseFollowerVertical->setLine(QLineF(0, profileYAxis->pos().y(), 0, timeAxis->pos().y()));
	disconnectTemporaryConnections();
	actionsForKeys[Qt::Key_Left]->setShortcut(Qt::Key_Left);
	actionsForKeys[Qt::Key_Right]->setShortcut(Qt::Key_Right);
	actionsForKeys[Qt::Key_Up]->setShortcut(Qt::Key_Up);
	actionsForKeys[Qt::Key_Down]->setShortcut(Qt::Key_Down);
	actionsForKeys[Qt::Key_Escape]->setShortcut(Qt::Key_Escape);
	actionsForKeys[Qt::Key_Delete]->setShortcut(Qt::Key_Delete);

	connectPlannerModel();

	/* show the same stuff that the profile shows. */
	currentState = PLAN; /* enable the add state. */
	diveCeiling->setVisible(true);
	decoModelParameters->setVisible(true);
	setBackgroundBrush(QColor("#D7E3EF"));

	pointsReset();
	repositionDiveHandlers();
}
#endif

bool ProfileWidget2::isPlanner() const
{
	return currentState == PLAN;
}

#if 0 // TODO::: FINISH OR DISABLE
struct int ProfileWidget2::getEntryFromPos(QPointF pos)
{
	// find the time stamp corresponding to the mouse position
	int seconds = lrint(timeAxis->valueAt(pos));

	for (int i = 0; i < plotInfo.nr; i++) {
		if (plotInfo.entry[i].sec >= seconds)
			return i;
	}
	return plotInfo.nr - 1;
}
#endif

#ifndef SUBSURFACE_MOBILE
/// Prints cylinder information for display.
/// eg : "Cyl 1 (AL80 EAN32)"
static QString printCylinderDescription(int i, const cylinder_t *cylinder)
{
	QString label = gettextFromC::tr("Cyl") + QString(" %1").arg(i+1);
	if( cylinder != NULL ) {
		QString mix = get_gas_string(cylinder->gasmix);
		label += QString(" (%2 %3)").arg(cylinder->type.description).arg(mix);
	}
	return label;
}

static bool isDiveTextItem(const QGraphicsItem *item, const DiveTextItem *textItem)
{
	while (item) {
		if (item == textItem)
			return true;
		item = item->parentItem();
	}
	return false;
}

void ProfileWidget2::contextMenuEvent(QContextMenuEvent *event)
{
	if (currentState == EDIT || currentState == PLAN) {
		QGraphicsView::contextMenuEvent(event);
		return;
	}
	QMenu m;
	if (!d)
		return;
	// figure out if we are ontop of the dive computer name in the profile
	QGraphicsItem *sceneItem = itemAt(mapFromGlobal(event->globalPos()));
	if (isDiveTextItem(sceneItem, diveComputerText)) {
		const struct divecomputer *currentdc = get_dive_dc_const(d, dc);
		if (!currentdc->deviceid && dc == 0 && number_of_computers(d) == 1)
			// nothing to do, can't rename, delete or reorder
			return;
		// create menu to show when right clicking on dive computer name
		if (dc > 0)
			m.addAction(tr("Make first dive computer"), this, &ProfileWidget2::makeFirstDC);
		if (number_of_computers(d) > 1) {
			m.addAction(tr("Delete this dive computer"), this, &ProfileWidget2::deleteCurrentDC);
			m.addAction(tr("Split this dive computer into own dive"), this, &ProfileWidget2::splitCurrentDC);
		}
		if (currentdc->deviceid)
			m.addAction(tr("Rename this dive computer"), this, &ProfileWidget2::renameCurrentDC);
		m.exec(event->globalPos());
		// don't show the regular profile context menu
		return;
	}

	// create the profile context menu
	QPointF scenePos = mapToScene(mapFromGlobal(event->globalPos()));
	qreal sec_val = timeAxis->valueAt(scenePos);
	int seconds = (sec_val < 0.0) ? 0 : (int)sec_val;
	DiveEventItem *item = dynamic_cast<DiveEventItem *>(sceneItem);

	// Add or edit Gas Change
	if (d && item && event_is_gaschange(item->getEvent())) {
		int eventTime = item->getEvent()->time.seconds;
		QMenu *gasChange = m.addMenu(tr("Edit Gas Change"));
		for (int i = 0; i < d->cylinders.nr; i++) {
			const cylinder_t *cylinder = get_cylinder(d, i);
			QString label = printCylinderDescription(i, cylinder);
			gasChange->addAction(label, [this, i, eventTime] { changeGas(i, eventTime); });
		}
	} else if (d && d->cylinders.nr > 1) {
		// if we have more than one gas, offer to switch to another one
		QMenu *gasChange = m.addMenu(tr("Add gas change"));
		for (int i = 0; i < d->cylinders.nr; i++) {
			const cylinder_t *cylinder = get_cylinder(d, i);
			QString label = printCylinderDescription(i, cylinder);
			gasChange->addAction(label, [this, i, seconds] { changeGas(i, seconds); });
		}
	}
	m.addAction(tr("Add setpoint change"), [this, seconds]() { ProfileWidget2::addSetpointChange(seconds); });
	m.addAction(tr("Add bookmark"), [this, seconds]() { addBookmark(seconds); });
	m.addAction(tr("Split dive into two"), [this, seconds]() { splitDive(seconds); });
	const struct event *ev = NULL;
	enum divemode_t divemode = UNDEF_COMP_TYPE;

	get_current_divemode(get_dive_dc_const(d, dc), seconds, &ev, &divemode);
	QMenu *changeMode = m.addMenu(tr("Change divemode"));
	if (divemode != OC)
		changeMode->addAction(gettextFromC::tr(divemode_text_ui[OC]),
				      [this, seconds](){ addDivemodeSwitch(seconds, OC); });
	if (divemode != CCR)
		changeMode->addAction(gettextFromC::tr(divemode_text_ui[CCR]),
				      [this, seconds](){ addDivemodeSwitch(seconds, CCR); });
	if (divemode != PSCR)
		changeMode->addAction(gettextFromC::tr(divemode_text_ui[PSCR]),
				      [this, seconds](){ addDivemodeSwitch(seconds, PSCR); });

	if (same_string(get_dive_dc_const(d, dc)->model, "manually added dive") || !get_dive_dc_const(d, dc)->samples)
		m.addAction(tr("Edit the profile"), this, &ProfileWidget2::editCurrentDive);

	if (DiveEventItem *item = dynamic_cast<DiveEventItem *>(sceneItem)) {
		m.addAction(tr("Remove event"), [this,item] { removeEvent(item); });
		m.addAction(tr("Hide similar events"), [this, item] { hideEvents(item); });
		const struct event *dcEvent = item->getEvent();
		if (dcEvent->type == SAMPLE_EVENT_BOOKMARK)
			m.addAction(tr("Edit name"), [this, item] { editName(item); });
#if 0 // TODO::: FINISH OR DISABLE
		QPointF scenePos = mapToScene(event->pos());
		int idx = getEntryFromPos(scenePos);
		// this shows how to figure out if we should ask the user if they want adjust interpolated pressures
		// at either side of a gas change
		if (dcEvent->type == SAMPLE_EVENT_GASCHANGE || dcEvent->type == SAMPLE_EVENT_GASCHANGE2) {
			qDebug() << "figure out if there are interpolated pressures";
			int gasChangeIdx = idx;
			while (gasChangeIdx > 0) {
				--gasChangeIdx;
				if (plotInfo.entry[gasChangeIdx].sec <= dcEvent->time.seconds)
					break;
			}
			const struct plot_data &gasChangeEntry = plotInfo.entry[newGasIdx];
			qDebug() << "at gas change at" << gasChangeEntry->sec << ": sensor pressure" << get_plot_sensor_pressure(&plotInfo, newGasIdx)
				 << "interpolated" << ;get_plot_sensor_pressure(&plotInfo, newGasIdx);
			// now gasChangeEntry points at the gas change, that entry has the final pressure of
			// the old tank, the next entry has the starting pressure of the next tank
			if (gasChangeIdx < plotInfo.nr - 1) {
				int newGasIdx = gasChangeIdx + 1;
				const struct plot_data &newGasEntry = plotInfo.entry[newGasIdx];
				qDebug() << "after gas change at " << newGasEntry->sec << ": sensor pressure" << newGasEntry->pressure[0] << "interpolated" << newGasEntry->pressure[1];
				if (get_plot_sensor_pressure(&plotInfo, gasChangeIdx) == 0 || get_cylinder(d, gasChangeEntry->sensor[0])->sample_start.mbar == 0) {
					// if we have no sensorpressure or if we have no pressure from samples we can assume that
					// we only have interpolated pressure (the pressure in the entry may be stored in the sensor
					// pressure field if this is the first or last entry for this tank... see details in gaspressures.c
					pressure_t pressure;
					pressure.mbar = get_plot_interpolated_pressure(&plotInfo, gasChangeIdx) ? : get_plot_sensor_pressure(&plotInfo, gasChangeIdx);
					QAction *adjustOldPressure = m.addAction(tr("Adjust pressure of cyl. %1 (currently interpolated as %2)")
										 .arg(gasChangeEntry->sensor[0] + 1).arg(get_pressure_string(pressure)));
				}
				if (get_plot_sensor_pressure(&plotInfo, newGasIdx) == 0 || get_cylinder(d, newGasEntry->sensor[0])->sample_start.mbar == 0) {
					// we only have interpolated press -- see commend above
					pressure_t pressure;
					pressure.mbar = get_plot_interpolated_pressure(&plotInfo, newGasIdx) ? : get_plot_sensor_pressure(&plotInfo, newGasIdx);
					QAction *adjustOldPressure = m.addAction(tr("Adjust pressure of cyl. %1 (currently interpolated as %2)")
										 .arg(newGasEntry->sensor[0] + 1).arg(get_pressure_string(pressure)));
				}
			}
		}
#endif
	}
	bool some_hidden = false;
	for (int i = 0; i < evn_used; i++) {
		if (ev_namelist[i].plot_ev == false) {
			some_hidden = true;
			break;
		}
	}
	if (some_hidden)
		m.addAction(tr("Unhide all events"), this, &ProfileWidget2::unhideEvents);
	m.exec(event->globalPos());
}

void ProfileWidget2::deleteCurrentDC()
{
	if (d)
		Command::deleteDiveComputer(mutable_dive(), dc);
}

void ProfileWidget2::splitCurrentDC()
{
	if (d)
		Command::splitDiveComputer(mutable_dive(), dc);
}

void ProfileWidget2::makeFirstDC()
{
	if (d)
		Command::moveDiveComputerToFront(mutable_dive(), dc);
}

void ProfileWidget2::renameCurrentDC()
{
	bool ok;
	QString newName = QInputDialog::getText(this, tr("Edit nickname"),
						tr("Set new nickname for %1 (serial %2):").arg(current_dc->model).arg(current_dc->serial),
						QLineEdit::Normal, get_dc_nickname(current_dc), &ok);
	if (ok)
		Command::editDeviceNickname(current_dc, newName);
}

void ProfileWidget2::hideEvents(DiveEventItem *item)
{
	const struct event *event = item->getEvent();

	if (QMessageBox::question(this,
				  TITLE_OR_TEXT(tr("Hide events"), tr("Hide all %1 events?").arg(event->name)),
				  QMessageBox::Ok | QMessageBox::Cancel) == QMessageBox::Ok) {
		if (!empty_string(event->name)) {
			for (int i = 0; i < evn_used; i++) {
				if (same_string(event->name, ev_namelist[i].ev_name)) {
					ev_namelist[i].plot_ev = false;
					break;
				}
			}
			Q_FOREACH (DiveEventItem *evItem, eventItems) {
				if (same_string(evItem->getEvent()->name, event->name))
					evItem->hide();
			}
		} else {
			item->hide();
		}
	}
}

void ProfileWidget2::unhideEvents()
{
	for (int i = 0; i < evn_used; i++) {
		ev_namelist[i].plot_ev = true;
	}
	Q_FOREACH (DiveEventItem *item, eventItems)
		item->show();
}

void ProfileWidget2::removeEvent(DiveEventItem *item)
{
	struct event *event = item->getEventMutable();
	if (!event || !d)
		return;

	if (QMessageBox::question(this, TITLE_OR_TEXT(
					  tr("Remove the selected event?"),
					  tr("%1 @ %2:%3").arg(event->name).arg(event->time.seconds / 60).arg(event->time.seconds % 60, 2, 10, QChar('0'))),
				  QMessageBox::Ok | QMessageBox::Cancel) == QMessageBox::Ok)
		Command::removeEvent(mutable_dive(), dc, event);
}

void ProfileWidget2::addBookmark(int seconds)
{
	if (d)
		Command::addEventBookmark(mutable_dive(), dc, seconds);
}

void ProfileWidget2::addDivemodeSwitch(int seconds, int divemode)
{
	if (d)
		Command::addEventDivemodeSwitch(mutable_dive(), dc, seconds, divemode);
}

void ProfileWidget2::addSetpointChange(int seconds)
{
	if (!d)
		return;
	SetpointDialog dialog(mutable_dive(), dc, seconds);
	dialog.exec();
}

void ProfileWidget2::splitDive(int seconds)
{
#ifndef SUBSURFACE_MOBILE
	if (!d)
		return;
	Command::splitDives(mutable_dive(), duration_t{ seconds });
#endif
}

void ProfileWidget2::changeGas(int tank, int seconds)
{
	if (!d || tank < 0 || tank >= d->cylinders.nr)
		return;

	Command::addGasSwitch(mutable_dive(), dc, seconds, tank);
}
#endif

void ProfileWidget2::setPrintMode(bool mode, bool grayscale)
{
	printMode = mode;
	resetZoom();

	// set printMode for axes
	profileYAxis->setPrintMode(mode);
	gasYAxis->setPrintMode(mode);
	temperatureAxis->setPrintMode(mode);
	timeAxis->setPrintMode(mode);
	cylinderPressureAxis->setPrintMode(mode);
	isGrayscale = mode ? grayscale : false;
#ifndef SUBSURFACE_MOBILE
	heartBeatAxis->setPrintMode(mode);
	percentageAxis->setPrintMode(mode);

	mouseFollowerHorizontal->setVisible(!mode);
	mouseFollowerVertical->setVisible(!mode);
	toolTipItem->setVisible(!mode);
#endif
}

void ProfileWidget2::setFontPrintScale(double scale)
{
	fontPrintScale = scale;
	emit fontPrintScaleChanged(scale);
}

double ProfileWidget2::getFontPrintScale() const
{
	if (printMode)
		return fontPrintScale;
	else
		return 1.0;
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::editName(DiveEventItem *item)
{
	struct event *event = item->getEventMutable();
	if (!event || !d)
		return;
	bool ok;
	QString newName = QInputDialog::getText(this, tr("Edit name of bookmark"),
						tr("Custom name:"), QLineEdit::Normal,
						event->name, &ok);
	if (ok && !newName.isEmpty()) {
		if (newName.length() > 22) { //longer names will display as garbage.
			QMessageBox lengthWarning;
			lengthWarning.setText(tr("Name is too long!"));
			lengthWarning.exec();
			return;
		}
		Command::renameEvent(mutable_dive(), dc, event, qPrintable(newName));
	}
}
#endif

void ProfileWidget2::disconnectTemporaryConnections()
{
#ifndef SUBSURFACE_MOBILE
	if (plannerModel) {
		disconnect(plannerModel, &DivePlannerPointsModel::dataChanged, this, &ProfileWidget2::replot);
		disconnect(plannerModel, &DivePlannerPointsModel::cylinderModelEdited, this, &ProfileWidget2::replot);

		disconnect(plannerModel, &DivePlannerPointsModel::modelReset, this, &ProfileWidget2::pointsReset);
		disconnect(plannerModel, &DivePlannerPointsModel::rowsInserted, this, &ProfileWidget2::pointInserted);
		disconnect(plannerModel, &DivePlannerPointsModel::rowsRemoved, this, &ProfileWidget2::pointsRemoved);
		disconnect(plannerModel, &DivePlannerPointsModel::rowsMoved, this, &ProfileWidget2::pointsMoved);
	}
#endif
	Q_FOREACH (QAction *action, actionsForKeys.values()) {
		action->setShortcut(QKeySequence());
		action->setShortcutContext(Qt::WidgetShortcut);
	}
}

int ProfileWidget2::handleIndex(const DiveHandler *h) const
{
	auto it = std::find_if(handles.begin(), handles.end(),
			       [h] (const std::unique_ptr<DiveHandler> &h2)
			       { return h == h2.get(); });
	return it != handles.end() ? it - handles.begin() : -1;
}

#ifndef SUBSURFACE_MOBILE

DiveHandler *ProfileWidget2::createHandle()
{
	DiveHandler *item = new DiveHandler(d);
	scene()->addItem(item);
	connect(item, &DiveHandler::moved, this, &ProfileWidget2::divePlannerHandlerMoved);
	connect(item, &DiveHandler::clicked, this, &ProfileWidget2::divePlannerHandlerClicked);
	connect(item, &DiveHandler::released, this, &ProfileWidget2::divePlannerHandlerReleased);
	return item;
}

QGraphicsSimpleTextItem *ProfileWidget2::createGas()
{
	QGraphicsSimpleTextItem *gasChooseBtn = new QGraphicsSimpleTextItem();
	scene()->addItem(gasChooseBtn);
	gasChooseBtn->setZValue(10);
	gasChooseBtn->setFlag(QGraphicsItem::ItemIgnoresTransformations);
	return gasChooseBtn;
}

void ProfileWidget2::pointsReset()
{
	handles.clear();
	gases.clear();
	int count = plannerModel->rowCount();
	for (int i = 0; i < count; ++i) {
		handles.emplace_back(createHandle());
		gases.emplace_back(createGas());
	}
}

void ProfileWidget2::pointInserted(const QModelIndex &, int from, int to)
{
	for (int i = from; i <= to; ++i) {
		handles.emplace(handles.begin() + i, createHandle());
		gases.emplace(gases.begin() + i, createGas());
	}

	// Note: we don't replot the dive here, because when removing multiple
	// points, these might trickle in one-by-one. Instead, the model will
	// emit a data-changed signal.
}

void ProfileWidget2::pointsRemoved(const QModelIndex &, int start, int end)
{
	// Qt's model/view API is mad. The end-point is inclusive, which means that the empty range is [0,-1]!
	handles.erase(handles.begin() + start, handles.begin() + end + 1);
	gases.erase(gases.begin() + start, gases.begin() + end + 1);
	scene()->clearSelection();

	// Note: we don't replot the dive here, because when removing multiple
	// points, these might trickle in one-by-one. Instead, the model will
	// emit a data-changed signal.
}

void ProfileWidget2::pointsMoved(const QModelIndex &, int start, int end, const QModelIndex &, int row)
{
	moveInVector(handles, start, end + 1, row);
	moveInVector(gases, start, end + 1, row);
}

void ProfileWidget2::repositionDiveHandlers()
{
	hideAll(gases);
	// Re-position the user generated dive handlers
	for (int i = 0; i < plannerModel->rowCount(); i++) {
		struct divedatapoint datapoint = plannerModel->at(i);
		if (datapoint.time == 0) // those are the magic entries for tanks
			continue;
		DiveHandler *h = handles[i].get();
		h->setVisible(datapoint.entered);
		h->setPos(timeAxis->posAtValue(datapoint.time), profileYAxis->posAtValue(datapoint.depth.mm));
		QPointF p1;
		if (i == 0) {
			if (prefs.drop_stone_mode)
				// place the text on the straight line from the drop to stone position
				p1 = QPointF(timeAxis->posAtValue(datapoint.depth.mm / prefs.descrate),
					     profileYAxis->posAtValue(datapoint.depth.mm));
			else
				// place the text on the straight line from the origin to the first position
				p1 = QPointF(timeAxis->posAtValue(0), profileYAxis->posAtValue(0));
		} else {
			// place the text on the line from the last position
			p1 = handles[i - 1]->pos();
		}
		QPointF p2 = handles[i]->pos();
		QLineF line(p1, p2);
		QPointF pos = line.pointAt(0.5);
		gases[i]->setPos(pos);
		if (datapoint.cylinderid >= 0 && datapoint.cylinderid < d->cylinders.nr)
			gases[i]->setText(get_gas_string(get_cylinder(d, datapoint.cylinderid)->gasmix));
		else
			gases[i]->setText(QString());
		gases[i]->setVisible(datapoint.entered &&
				(i == 0 || gases[i]->text() != gases[i-1]->text()));
	}
}

void ProfileWidget2::divePlannerHandlerMoved()
{
	DiveHandler *activeHandler = qobject_cast<DiveHandler *>(sender());
	int index = handleIndex(activeHandler);

	// Grow the time axis if necessary.
	int minutes = lrint(timeAxis->valueAt(activeHandler->pos()) / 60);
	if (minutes * 60 > timeAxis->maximum() * 0.9)
		timeAxis->setMaximum(timeAxis->maximum() * 1.02);

	divedatapoint data = plannerModel->at(index);
	data.depth.mm = lrint(profileYAxis->valueAt(activeHandler->pos()) / M_OR_FT(1, 1)) * M_OR_FT(1, 1);
	data.time = lrint(timeAxis->valueAt(activeHandler->pos()));

	plannerModel->editStop(index, data);
}

void ProfileWidget2::keyDownAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handleIndex(handler);
			divedatapoint dp = plannerModel->at(row);

			dp.depth.mm += M_OR_FT(1, 5);
			plannerModel->editStop(row, dp);
		}
	}
}

void ProfileWidget2::keyUpAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handleIndex(handler);
			divedatapoint dp = plannerModel->at(row);

			if (dp.depth.mm <= 0)
				continue;

			dp.depth.mm -= M_OR_FT(1, 5);
			plannerModel->editStop(row, dp);
		}
	}
}

void ProfileWidget2::keyLeftAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handleIndex(handler);
			divedatapoint dp = plannerModel->at(row);

			if (dp.time / 60 <= 0)
				continue;

			dp.time -= 60;
			plannerModel->editStop(row, dp);
		}
	}
}

void ProfileWidget2::keyRightAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handleIndex(handler);
			divedatapoint dp = plannerModel->at(row);

			dp.time += 60;
			plannerModel->editStop(row, dp);
		}
	}
}

void ProfileWidget2::keyDeleteAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	QVector<int> selectedIndices;
	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			selectedIndices.push_back(handleIndex(handler));
			handler->hide();
		}
	}
	if (!selectedIndices.isEmpty())
		plannerModel->removeSelectedPoints(selectedIndices);
}

void ProfileWidget2::keyEscAction()
{
	if ((currentState != EDIT && currentState != PLAN) || !plannerModel)
		return;

	if (scene()->selectedItems().count()) {
		scene()->clearSelection();
		return;
	}

	if (plannerModel->isPlanner())
		plannerModel->cancelPlan();
}

void ProfileWidget2::clearPictures()
{
	pictures.clear();
}

static const double unscaledDurationLineWidth = 2.5;
static const double unscaledDurationLinePenWidth = 0.5;

// Reset the duration line after an image was moved or we found a new duration
void ProfileWidget2::updateDurationLine(PictureEntry &e)
{
	if (e.duration.seconds > 0) {
		// We know the duration of this video, reset the line symbolizing its extent accordingly
		double begin = timeAxis->posAtValue(e.offset.seconds);
		double end = timeAxis->posAtValue(e.offset.seconds + e.duration.seconds);
		double y = e.thumbnail->y();

		// Undo scaling for pen-width and line-width. For this purpose, we use the scaling of the y-axis.
		double scale = transform().m22();
		double durationLineWidth = unscaledDurationLineWidth / scale;
		double durationLinePenWidth = unscaledDurationLinePenWidth / scale;
		e.durationLine.reset(new QGraphicsRectItem(begin, y - durationLineWidth - durationLinePenWidth, end - begin, durationLineWidth));
		e.durationLine->setPen(QPen(getColor(DURATION_LINE, isGrayscale), durationLinePenWidth));
		e.durationLine->setBrush(getColor(::BACKGROUND, isGrayscale));
		e.durationLine->setVisible(prefs.show_pictures_in_profile);
		scene()->addItem(e.durationLine.get());
	} else {
		// This is either a picture or a video with unknown duration.
		// In case there was a line (how could that be?) remove it.
		e.durationLine.reset();
	}
}

// This function is called asynchronously by the thumbnailer if a thumbnail
// was fetched from disk or freshly calculated.
void ProfileWidget2::updateThumbnail(QString filename, QImage thumbnail, duration_t duration)
{
	// Find the picture with the given filename
	auto it = std::find_if(pictures.begin(), pictures.end(), [&filename](const PictureEntry &e)
			       { return e.filename == filename; });

	// If we didn't find a picture, it does either not belong to the current dive,
	// or its timestamp is outside of the profile.
	if (it != pictures.end()) {
		// Replace the pixmap of the thumbnail with the newly calculated one.
		int size = Thumbnailer::defaultThumbnailSize();
		it->thumbnail->setPixmap(QPixmap::fromImage(thumbnail.scaled(size, size, Qt::KeepAspectRatio)));

		// If the duration changed, update the line
		if (duration.seconds != it->duration.seconds) {
			it->duration = duration;
			updateDurationLine(*it);
			// If we created / removed a duration line, we have to update the thumbnail paint order.
			updateThumbnailPaintOrder();
		}
	}
}

// Create a PictureEntry object and add its thumbnail to the scene if profile pictures are shown.
ProfileWidget2::PictureEntry::PictureEntry(offset_t offsetIn, const QString &filenameIn, ProfileWidget2 *profile, bool synchronous) : offset(offsetIn),
	duration(duration_t {0}),
	filename(filenameIn),
	thumbnail(new DivePictureItem)
{
	QGraphicsScene *scene = profile->scene();
	int size = Thumbnailer::defaultThumbnailSize();
	scene->addItem(thumbnail.get());
	thumbnail->setVisible(prefs.show_pictures_in_profile);
	QImage img = Thumbnailer::instance()->fetchThumbnail(filename, synchronous).scaled(size, size, Qt::KeepAspectRatio);
	thumbnail->setPixmap(QPixmap::fromImage(img));
	thumbnail->setFileUrl(filename);
	connect(thumbnail.get(), &DivePictureItem::removePicture, profile, &ProfileWidget2::removePicture);
}

// Define a default sort order for picture-entries: sort lexicographically by timestamp and filename.
bool ProfileWidget2::PictureEntry::operator< (const PictureEntry &e) const
{
	// Use std::tie() for lexicographical sorting.
	return std::tie(offset.seconds, filename) < std::tie(e.offset.seconds, e.filename);
}

// This function updates the paint order of the thumbnails and duration-lines, such that later
// thumbnails are painted on top of previous thumbnails and duration-lines on top of the thumbnail
// they belong to.
void ProfileWidget2::updateThumbnailPaintOrder()
{
	if (!pictures.size())
		return;
	// To get the correct sort order, we place in thumbnails at equal z-distances
	// between thumbnailBaseZValue and (thumbnailBaseZValue + 1.0).
	// Duration-lines are placed between the thumbnails.
	double z = thumbnailBaseZValue;
	double step = 1.0 / (double)pictures.size();
	for (PictureEntry &e: pictures) {
		e.thumbnail->setBaseZValue(z);
		if (e.durationLine)
			e.durationLine->setZValue(z + step / 2.0);
		z += step;
	}
}

// Calculate the y-coordinates of the thumbnails, which are supposed to be sorted by x-coordinate.
// This will also change the order in which the thumbnails are painted, to avoid weird effects,
// when items are added later to the scene. This is done using the QGraphicsItem::packBefore() function.
// We can't use the z-value, because that will be modified on hoverEnter and hoverExit events.
void ProfileWidget2::calculatePictureYPositions()
{
	double lastX = -1.0, lastY = 0.0;
	for (PictureEntry &e: pictures) {
		// let's put the picture at the correct time, but at a fixed "depth" on the profile
		// not sure this is ideal, but it seems to look right.
		double x = e.thumbnail->x();
		double y;
		if (lastX >= 0.0 && fabs(x - lastX) < 3 && lastY <= (10 + 14 * 3))
			y = lastY + 3;
		else
			y = 10;
		lastX = x;
		lastY = y;
		e.thumbnail->setY(y);
		updateDurationLine(e); // If we changed the y-position, we also have to change the duration-line.
	}
	updateThumbnailPaintOrder();
}

void ProfileWidget2::updateThumbnailXPos(PictureEntry &e)
{
	// Here, we only set the x-coordinate of the picture. The y-coordinate
	// will be set later in calculatePictureYPositions().
	double x = timeAxis->posAtValue(e.offset.seconds);
	e.thumbnail->setX(x);
}

// This function resets the picture thumbnails of the current dive.
void ProfileWidget2::plotPictures()
{
	plotPicturesInternal(d, false);
}

void ProfileWidget2::plotPicturesInternal(const struct dive *d, bool synchronous)
{
	pictures.clear();
	if (currentState == EDIT || currentState == PLAN)
		return;

	// Fetch all pictures of the dive, but consider only those that are within the dive time.
	// For each picture, create a PictureEntry object in the pictures-vector.
	// emplace_back() constructs an object at the end of the vector. The parameters are passed directly to the constructor.
	// Note that FOR_EACH_PICTURE handles d being null gracefully.
	FOR_EACH_PICTURE(d) {
		if (picture->offset.seconds > 0 && picture->offset.seconds <= d->duration.seconds)
			pictures.emplace_back(picture->offset, QString(picture->filename), this, synchronous);
	}
	if (pictures.empty())
		return;
	// Sort pictures by timestamp (and filename if equal timestamps).
	// This will allow for proper location of the pictures on the profile plot.
	std::sort(pictures.begin(), pictures.end());

	// Calculate thumbnail positions. First the x-coordinates and and then the y-coordinates.
	for (PictureEntry &e: pictures)
		updateThumbnailXPos(e);
	calculatePictureYPositions();
}

// Remove the pictures with the given filenames from the profile plot.
void ProfileWidget2::picturesRemoved(dive *d, QVector<QString> fileUrls)
{
	// To remove the pictures, we use the std::remove_if() algorithm.
	// std::remove_if() does not actually delete the elements, but moves
	// them to the end of the given range. It returns an iterator to the
	// end of the new range of non-deleted elements. A subsequent call to
	// std::erase on the range of deleted elements then ultimately shrinks the vector.
	// (c.f. erase-remove idiom: https://en.wikipedia.org/wiki/Erase%E2%80%93remove_idiom)
	auto it = std::remove_if(pictures.begin(), pictures.end(), [&fileUrls](const PictureEntry &e)
			// Check whether filename of entry is in list of provided filenames
			{ return std::find(fileUrls.begin(), fileUrls.end(), e.filename) != fileUrls.end(); });
	pictures.erase(it, pictures.end());
	calculatePictureYPositions();
}

void ProfileWidget2::picturesAdded(dive *d, QVector<PictureObj> pics)
{
	for (const PictureObj &pic: pics) {
		if (pic.offset.seconds > 0 && pic.offset.seconds <= d->duration.seconds) {
			pictures.emplace_back(pic.offset, QString::fromStdString(pic.filename), this, false);
			updateThumbnailXPos(pictures.back());
		}
	}

	// Sort pictures by timestamp (and filename if equal timestamps).
	// This will allow for proper location of the pictures on the profile plot.
	std::sort(pictures.begin(), pictures.end());

	calculatePictureYPositions();
}

void ProfileWidget2::removePicture(const QString &fileUrl)
{
	if (d)
		Command::removePictures({ { mutable_dive(), { fileUrl.toStdString() } } });
}

void ProfileWidget2::profileChanged(dive *dive)
{
	if (dive != d)
		return; // Cylinders of a differnt dive than the shown one changed.
	replot();
}

#endif

void ProfileWidget2::dropEvent(QDropEvent *event)
{
#ifndef SUBSURFACE_MOBILE
	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop") && d) {
		QByteArray itemData = event->mimeData()->data("application/x-subsurfaceimagedrop");
		QDataStream dataStream(&itemData, QIODevice::ReadOnly);

		QString filename;
		dataStream >> filename;
		QPointF mappedPos = mapToScene(event->pos());
		offset_t offset { (int32_t)lrint(timeAxis->valueAt(mappedPos)) };
		Command::setPictureOffset(mutable_dive(), filename, offset);

		if (event->source() == this) {
			event->setDropAction(Qt::MoveAction);
			event->accept();
		} else {
			event->acceptProposedAction();
		}
	} else {
		event->ignore();
	}
#endif
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::pictureOffsetChanged(dive *dIn, QString filename, offset_t offset)
{
	if (dIn != d)
		return; // Picture of a different dive than the one shown changed.

	// Calculate time in dive where picture was dropped and whether the new position is during the dive.
	bool duringDive = d && offset.seconds > 0 && offset.seconds < d->duration.seconds;

	// A picture was drag&dropped onto the profile: We have four cases to consider:
	//	1a) The image was already shown on the profile and is moved to a different position on the profile.
	//	    Calculate the new position and move the picture.
	//	1b) The image was on the profile and is moved outside of the dive time.
	//	    Remove the picture.
	//	2a) The image was not on the profile and is moved into the dive time.
	//	    Add the picture to the profile.
	//	2b) The image was not on the profile and is moved outside of the dive time.
	//	    Do nothing.
	auto oldPos = std::find_if(pictures.begin(), pictures.end(), [filename](const PictureEntry &e)
				   { return e.filename == filename; });
	if (oldPos != pictures.end()) {
		// Cases 1a) and 1b): picture is on profile
		if (duringDive) {
			// Case 1a): move to new position
			// First, find new position. Note that we also have to compare filenames,
			// because it is quite easy to generate equal offsets.
			auto newPos = std::find_if(pictures.begin(), pictures.end(), [offset, &filename](const PictureEntry &e)
						   { return std::tie(e.offset.seconds, e.filename) > std::tie(offset.seconds, filename); });
			// Set new offset
			oldPos->offset.seconds = offset.seconds;
			updateThumbnailXPos(*oldPos);

			// Move image from old to new position
			int oldIndex = oldPos - pictures.begin();
			int newIndex = newPos - pictures.begin();
			moveInVector(pictures, oldIndex, oldIndex + 1, newIndex);
		} else {
			// Case 1b): remove picture
			pictures.erase(oldPos);
		}

		// In both cases the picture list changed, therefore we must recalculate the y-coordinatesA.
		calculatePictureYPositions();
	} else {
		// Cases 2a) and 2b): picture not on profile. We only have to take action for
		// the first case: picture is moved into dive-time.
		if (duringDive) {
			// Case 2a): add the picture at the appropriate position.
			// The case move from outside-to-outside of the profile plot was handled by
			// the "&& duringDive" condition in the if above.
			// As for case 1a), we have to also consider filenames in the case of equal offsets.
			auto newPos = std::find_if(pictures.begin(), pictures.end(), [offset, &filename](const PictureEntry &e)
						   { return std::tie(e.offset.seconds, e.filename) > std::tie(offset.seconds, filename); });
			// emplace() constructs the element at the given position in the vector.
			// The parameters are passed directly to the contructor.
			// The call returns an iterator to the new element (which might differ from
			// the old iterator, since the buffer might have been reallocated).
			newPos = pictures.emplace(newPos, offset, filename, this, false);
			updateThumbnailXPos(*newPos);
			calculatePictureYPositions();
		}
	}
}
#endif

void ProfileWidget2::dragEnterEvent(QDragEnterEvent *event)
{
	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop")) {
		if (event->source() == this) {
			event->setDropAction(Qt::MoveAction);
			event->accept();
		} else {
			event->acceptProposedAction();
		}
	} else {
		event->ignore();
	}
}

void ProfileWidget2::dragMoveEvent(QDragMoveEvent *event)
{
	if (event->mimeData()->hasFormat("application/x-subsurfaceimagedrop")) {
		if (event->source() == this) {
			event->setDropAction(Qt::MoveAction);
			event->accept();
		} else {
			event->acceptProposedAction();
		}
	} else {
		event->ignore();
	}
}

struct dive *ProfileWidget2::mutable_dive() const
{
	return const_cast<dive *>(d);
}