// SPDX-License-Identifier: GPL-2.0
#include "profile-widget/profilewidget2.h"
#include "qt-models/diveplotdatamodel.h"
#include "core/subsurface-string.h"
#include "core/qthelper.h"
#include "core/profile.h"
#include "core/settings/qPrefAnimations.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 "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 "qt-models/divepicturemodel.h"
#include "core/divelist.h"
#ifndef SUBSURFACE_MOBILE
#include "desktop-widgets/diveplanner.h"
#include "desktop-widgets/simplewidgets.h"
#include "desktop-widgets/divepicturewidget.h"
#include "desktop-widgets/mainwindow.h"
#include "core/qthelper.h"
#include "core/gettextfromc.h"
#include "core/imagedownloader.h"
#endif

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

#ifndef QT_NO_DEBUG
#include <QTableView>
#endif
#ifndef SUBSURFACE_MOBILE
#include "desktop-widgets/preferences/preferencesdialog.h"
#endif
#include <QtWidgets>

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

// a couple of helpers we need
extern bool haveFilesOnCommandLine();

/* 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.
 */
static struct _ItemPos {
	struct _Pos {
		QPointF on;
		QPointF off;
	};
	struct _Axis {
		_Pos pos;
		QLineF shrinked;
		QLineF expanded;
		QLineF intermediate;
	};
	_Pos background;
	_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;

// 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

ProfileWidget2::ProfileWidget2(QWidget *parent) : QGraphicsView(parent),
	currentState(INVALID),
	dataModel(new DivePlotDataModel(this)),
	zoomLevel(0),
	zoomFactor(1.15),
	background(new DivePixmapItem()),
	backgroundFile(":poster-icon"),
#ifndef SUBSURFACE_MOBILE
	toolTipItem(new ToolTipItem()),
#endif
	isPlotZoomed(prefs.zoomed_plot),// no! bad use of prefs. 'PreferencesDialog::loadSettings' NOT CALLED yet.
	profileYAxis(new DepthAxis(this)),
	gasYAxis(new PartialGasPressureAxis(this)),
	temperatureAxis(new TemperatureAxis(this)),
	timeAxis(new TimeAxis(this)),
	diveProfileItem(new DiveProfileItem()),
	temperatureItem(new DiveTemperatureItem()),
	meanDepthItem(new DiveMeanDepthItem()),
	cylinderPressureAxis(new DiveCartesianAxis(this)),
	gasPressureItem(new DiveGasPressureItem()),
	diveComputerText(new DiveTextItem()),
	reportedCeiling(new DiveReportedCeiling()),
	pn2GasItem(new PartialPressureGasItem()),
	pheGasItem(new PartialPressureGasItem()),
	po2GasItem(new PartialPressureGasItem()),
	o2SetpointGasItem(new PartialPressureGasItem()),
	ccrsensor1GasItem(new PartialPressureGasItem()),
	ccrsensor2GasItem(new PartialPressureGasItem()),
	ccrsensor3GasItem(new PartialPressureGasItem()),
	ocpo2GasItem(new PartialPressureGasItem()),
#ifndef SUBSURFACE_MOBILE
	diveCeiling(new DiveCalculatedCeiling(this)),
	decoModelParameters(new DiveTextItem()),
	heartBeatAxis(new DiveCartesianAxis(this)),
	heartBeatItem(new DiveHeartrateItem()),
	percentageAxis(new DiveCartesianAxis(this)),
	ambPressureItem(new DiveAmbPressureItem()),
	gflineItem(new DiveGFLineItem()),
	mouseFollowerVertical(new DiveLineItem()),
	mouseFollowerHorizontal(new DiveLineItem()),
	rulerItem(new RulerItem2()),
#endif
	tankItem(new TankItem()),
	isGrayscale(false),
	printMode(false),
	shouldCalculateMaxTime(true),
	shouldCalculateMaxDepth(true),
	fontPrintScale(1.0)
{
	// would like to be able to ASSERT here that PreferencesDialog::loadSettings has been called.
	isPlotZoomed = prefs.zoomed_plot; // now it seems that 'prefs' has loaded our preferences

	memset(&plotInfo, 0, sizeof(plotInfo));

	setupSceneAndFlags();
	setupItemSizes();
	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(DivePictureModel::instance(), SIGNAL(rowsInserted(const QModelIndex &, int, int)), this, SLOT(plotPictures()));
	connect(DivePictureModel::instance(), &DivePictureModel::picturesRemoved, this, &ProfileWidget2::removePictures);
	connect(DivePictureModel::instance(), &DivePictureModel::modelReset, this, &ProfileWidget2::plotPictures);
#endif // SUBSURFACE_MOBILE

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

#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

#define SUBSURFACE_OBJ_DATA 1
#define SUBSURFACE_OBJ_DC_TEXT 0x42

void ProfileWidget2::addItemsToScene()
{
	scene()->addItem(background);
	scene()->addItem(profileYAxis);
	scene()->addItem(gasYAxis);
	scene()->addItem(temperatureAxis);
	scene()->addItem(timeAxis);
	scene()->addItem(diveProfileItem);
	scene()->addItem(cylinderPressureAxis);
	scene()->addItem(temperatureItem);
	scene()->addItem(meanDepthItem);
	scene()->addItem(gasPressureItem);
	// I cannot seem to figure out if an object that I find with itemAt() on the scene
	// is the object I am looking for - my guess is there's a simple way in Qt to do that
	// but nothing I tried worked.
	// so instead this adds a special magic key/value pair to the object to mark it
	diveComputerText->setData(SUBSURFACE_OBJ_DATA, SUBSURFACE_OBJ_DC_TEXT);
	scene()->addItem(diveComputerText);
	scene()->addItem(reportedCeiling);
	scene()->addItem(tankItem);
	scene()->addItem(pn2GasItem);
	scene()->addItem(pheGasItem);
	scene()->addItem(po2GasItem);
	scene()->addItem(o2SetpointGasItem);
	scene()->addItem(ccrsensor1GasItem);
	scene()->addItem(ccrsensor2GasItem);
	scene()->addItem(ccrsensor3GasItem);
	scene()->addItem(ocpo2GasItem);
#ifndef SUBSURFACE_MOBILE
	scene()->addItem(toolTipItem);
	scene()->addItem(diveCeiling);
	scene()->addItem(decoModelParameters);
	scene()->addItem(percentageAxis);
	scene()->addItem(heartBeatAxis);
	scene()->addItem(heartBeatItem);
	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);

	Q_FOREACH (DiveCalculatedTissue *tissue, allTissues) {
		scene()->addItem(tissue);
	}
	Q_FOREACH (DivePercentageItem *percentage, allPercentages) {
		scene()->addItem(percentage);
	}
	scene()->addItem(ambPressureItem);
	scene()->addItem(gflineItem);
#endif
}

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->setModel(dataModel);
	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));

	tankItem->setHorizontalAxis(timeAxis);

#ifndef SUBSURFACE_MOBILE
	rulerItem->setAxis(timeAxis, profileYAxis);

	// 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);
	setupItem(diveCeiling, profileYAxis, DivePlotDataModel::CEILING, DivePlotDataModel::TIME, 1);
	for (int i = 0; i < 16; i++) {
		DiveCalculatedTissue *tissueItem = new DiveCalculatedTissue(this);
		setupItem(tissueItem, profileYAxis, DivePlotDataModel::TISSUE_1 + i, DivePlotDataModel::TIME, 1 + i);
		allTissues.append(tissueItem);
		DivePercentageItem *percentageItem = new DivePercentageItem(i);
		setupItem(percentageItem, percentageAxis, DivePlotDataModel::PERCENTAGE_1 + i, DivePlotDataModel::TIME, 1 + i);
		allPercentages.append(percentageItem);
	}
	setupItem(heartBeatItem, heartBeatAxis, DivePlotDataModel::HEARTBEAT, DivePlotDataModel::TIME, 1);
	setupItem(ambPressureItem, percentageAxis, DivePlotDataModel::AMBPRESSURE, DivePlotDataModel::TIME, 1);
	setupItem(gflineItem, percentageAxis, DivePlotDataModel::GFLINE, DivePlotDataModel::TIME, 1);
#endif
	setupItem(reportedCeiling, profileYAxis, DivePlotDataModel::CEILING, DivePlotDataModel::TIME, 1);
	setupItem(gasPressureItem, cylinderPressureAxis, DivePlotDataModel::TEMPERATURE, DivePlotDataModel::TIME, 1);
	setupItem(temperatureItem, temperatureAxis, DivePlotDataModel::TEMPERATURE, DivePlotDataModel::TIME, 1);
	setupItem(diveProfileItem, profileYAxis, DivePlotDataModel::DEPTH, DivePlotDataModel::TIME, 0);
	setupItem(meanDepthItem, profileYAxis, DivePlotDataModel::INSTANT_MEANDEPTH, DivePlotDataModel::TIME, 1);

	createPPGas(pn2GasItem, DivePlotDataModel::PN2, PN2, PN2_ALERT, NULL, &prefs.pp_graphs.pn2_threshold);
	createPPGas(pheGasItem, DivePlotDataModel::PHE, PHE, PHE_ALERT, NULL, &prefs.pp_graphs.phe_threshold);
	createPPGas(po2GasItem, DivePlotDataModel::PO2, PO2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);
	createPPGas(o2SetpointGasItem, DivePlotDataModel::O2SETPOINT, O2SETPOINT, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);
	createPPGas(ccrsensor1GasItem, DivePlotDataModel::CCRSENSOR1, CCRSENSOR1, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);
	createPPGas(ccrsensor2GasItem, DivePlotDataModel::CCRSENSOR2, CCRSENSOR2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);
	createPPGas(ccrsensor3GasItem, DivePlotDataModel::CCRSENSOR3, CCRSENSOR3, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);
	createPPGas(ocpo2GasItem, DivePlotDataModel::SCR_OC_PO2, SCR_OCPO2, PO2_ALERT, &prefs.pp_graphs.po2_threshold_min, &prefs.pp_graphs.po2_threshold_max);

#undef CREATE_PP_GAS
#ifndef SUBSURFACE_MOBILE

	// Visibility Connections
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::phe_changed, pheGasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::po2_changed, po2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefPartialPressureGas::instance(), &qPrefPartialPressureGas::pn2_changed, pn2GasItem, &PartialPressureGasItem::setVisible);

	// because it was using a wrong settings.
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_setpoint_changed, o2SetpointGasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_scr_ocpo2_changed, ocpo2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensors_changed, ccrsensor1GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensors_changed, ccrsensor2GasItem, &PartialPressureGasItem::setVisible);
	connect(qPrefTechnicalDetails::instance(), &qPrefTechnicalDetails::show_ccr_sensors_changed, 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);

	replotEnabled = true;
}

void ProfileWidget2::replot(struct dive *d)
{
	if (!replotEnabled)
		return;
	dataModel->clear();
	plotDive(d, true, false);
}

void ProfileWidget2::createPPGas(PartialPressureGasItem *item, int verticalColumn, color_index_t color, color_index_t colorAlert,
				 double *thresholdSettingsMin, double *thresholdSettingsMax)
{
	setupItem(item, gasYAxis, verticalColumn, DivePlotDataModel::TIME, 0);
	item->setThresholdSettingsKey(thresholdSettingsMin, thresholdSettingsMax);
	item->setColors(getColor(color, isGrayscale), getColor(colorAlert, isGrayscale));
	item->settingsChanged();
	item->setZValue(99);
}

void ProfileWidget2::setupItemSizes()
{
	// 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.*
	 */

	itemPos.background.on.setX(0);
	itemPos.background.on.setY(0);
	itemPos.background.off.setX(0);
	itemPos.background.off.setY(110);

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

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

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

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

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

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

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

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

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

void ProfileWidget2::setupItem(AbstractProfilePolygonItem *item, DiveCartesianAxis *vAxis,
			       int vData, int hData, int zValue)
{
	item->setHorizontalAxis(timeAxis);
	item->setVerticalAxis(vAxis);
	item->setModel(dataModel);
	item->setVerticalDataColumn(vData);
	item->setHorizontalDataColumn(hData);
	item->setZValue(zValue);
}

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(struct dive *d, bool force, bool doClearPictures)
{
	static bool firstCall = true;
#ifndef SUBSURFACE_MOBILE
	QElapsedTimer measureDuration; // let's measure how long this takes us (maybe we'll turn of TTL calculation later
	measureDuration.start();
#else
	Q_UNUSED(doClearPictures);
#endif
	if (currentState != ADD && currentState != PLAN) {
		if (!d) {
			if (selected_dive == -1)
				return;
			d = current_dive; // display the current dive
		}

		// No need to do this again if we are already showing the same dive
		// computer of the same dive, so we check the unique id of the dive
		// and the selected dive computer number against the ones we are
		// showing (can't compare the dive pointers as those might change).
		if (d->id == displayed_dive.id && dc_number == dataModel->dcShown() && !force)
			return;

		// this copies the dive and makes copies of all the relevant additional data
		copy_dive(d, &displayed_dive);
#ifndef SUBSURFACE_MOBILE
		if (decoMode() == VPMB)
			decoModelParameters->setText(QString("VPM-B +%1").arg(prefs.vpmb_conservatism));
		else
			decoModelParameters->setText(QString("GF %1/%2").arg(prefs.gflow).arg(prefs.gfhigh));
	} else {
		DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
		plannerModel->createTemporaryPlan();
		struct diveplan &diveplan = plannerModel->getDiveplan();
		if (!diveplan.dp) {
			plannerModel->deleteTemporaryPlan();
			return;
		}
		if (decoMode() == 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
	}

	// special handling for the first time we display things
	int animSpeedBackup = 0;
	if (firstCall && haveFilesOnCommandLine()) {
		animSpeedBackup = qPrefAnimations::animation_speed();
		qPrefAnimations::set_animation_speed(0);
		firstCall = false;
	}

	// 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 != ADD);
#endif
	if (currentState == EMPTY)
		setProfileState();

	// next get the dive computer structure - if there are no samples
	// let's create a fake profile that's somewhat reasonable for the
	// data that we have
	struct divecomputer *currentdc = select_dc(&displayed_dive);
	Q_ASSERT(currentdc);
	if (!currentdc || !currentdc->samples)
		fake_dc(currentdc);

	bool setpointflag = (currentdc->divemode == CCR) && prefs.pp_graphs.po2 && current_dive;
	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.
	 */

	plotInfo = calculate_max_limits_new(&displayed_dive, currentdc);
#ifndef SUBSURFACE_MOBILE
	create_plot_info_new(&displayed_dive, currentdc, &plotInfo, !shouldCalculateMaxDepth, &DivePlannerPointsModel::instance()->final_deco_state);
#else
	create_plot_info_new(&displayed_dive, currentdc, &plotInfo, !shouldCalculateMaxDepth, nullptr);
#endif
	int newMaxtime = get_maxtime(&plotInfo);
	if (shouldCalculateMaxTime || 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 (!shouldCalculateMaxDepth) {
		if (maxdepth < newMaxDepth) {
			maxdepth = newMaxDepth;
		}
	} else {
		maxdepth = newMaxDepth;
	}

	dataModel->setDive(&displayed_dive, 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 (shouldCalculateMaxTime)
		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(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);
		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(dataModel, &plotInfo, &displayed_dive);

	dataModel->emitDataChanged();
	// 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(&displayed_dive, current_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();
		item->setHorizontalAxis(timeAxis);
		item->setVerticalAxis(profileYAxis);
		item->setModel(dataModel);
		item->setEvent(event, &lastgasmix);
		item->setZValue(2);
		scene()->addItem(item);
		eventItems.push_back(item);
		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->model, currentdc->deviceid);
	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(&displayed_dive)) > 1)
		dcText += tr(" (#%1 of %2)").arg(dc_number + 1).arg(nr);
#endif
	diveComputerText->setText(dcText);
	if (haveFilesOnCommandLine() && animSpeedBackup != 0) {
		qPrefAnimations::set_animation_speed(animSpeedBackup);
	}

#ifndef SUBSURFACE_MOBILE
	if (currentState == ADD || currentState == PLAN) { // TODO: figure a way to move this from here.
		repositionDiveHandlers();
		DivePlannerPointsModel *model = DivePlannerPointsModel::instance();
		model->deleteTemporaryPlan();
	}
	if (doClearPictures)
		clearPictures();
	else
		plotPictures();
#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.
#ifndef SUBSURFACE_MOBILE
	if (measureDuration.elapsed() > 1000 && prefs.calcndltts) {
		qPrefTechnicalDetails::set_calcndltts(false);
		report_error(qPrintable(tr("Show NDL / TTS was disabled because of excessive processing time")));
	}
#endif
}

void ProfileWidget2::recalcCeiling()
{
#ifndef SUBSURFACE_MOBILE
	diveCeiling->recalc();
#endif
}

void ProfileWidget2::dateTimeChanged()
{
	emit dateTimeChangedItems();
}

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

void ProfileWidget2::settingsChanged()
{
	// if we are showing calculated ceilings then we have to replot()
	// because the GF could have changed; otherwise we try to avoid replot()
	// but always replot in PLAN/ADD/EDIT mode to avoid a bug of DiveHandlers not
	// being redrawn on setting changes, causing them to become unattached
	// to the profile
	bool needReplot;
	if (currentState == ADD || currentState == PLAN || currentState ==  EDIT)
		needReplot = true;
	else
		needReplot = prefs.calcceiling;
#ifndef SUBSURFACE_MOBILE
	gasYAxis->settingsChanged();	// 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);
	}

	tankItem->setVisible(prefs.tankbar);
	if (prefs.zoomed_plot != isPlotZoomed) {
		isPlotZoomed = prefs.zoomed_plot;
		needReplot = true;
	}
	if (needReplot)
		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 == ADD || currentState == EDIT)
		shouldCalculateMaxDepth = shouldCalculateMaxTime = false;
}

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

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

void ProfileWidget2::mouseReleaseEvent(QMouseEvent *event)
{
	if (zoomLevel)
		return;
	QGraphicsView::mouseReleaseEvent(event);
	if (currentState == PLAN || currentState == ADD || currentState == EDIT) {
		shouldCalculateMaxTime = shouldCalculateMaxDepth = 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
}

#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->delta() > 0 && zoomLevel < 20) {
		scale(zoomFactor, zoomFactor);
		zoomLevel++;
	} else if (event->delta() < 0 && zoomLevel > 0) {
		// Zooming out
		scale(1.0 / zoomFactor, 1.0 / zoomFactor);
		zoomLevel--;
	}
	scrollViewTo(event->pos());
	toolTipItem->setPos(mapToScene(toolTipPos));
}

void ProfileWidget2::mouseDoubleClickEvent(QMouseEvent *event)
{
	if (currentState == PLAN || currentState == ADD) {
		DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
		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, -1, 0, true, UNDEF_COMP_TYPE);
	}
}

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();
}

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(pos);
	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(T &container)
{
	Q_FOREACH (auto *item, container)
		item->setVisible(false);
}

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

	disconnectTemporaryConnections();
	setBackgroundBrush(getColor(::BACKGROUND, isGrayscale));
	dataModel->clear();
	currentState = EMPTY;
	emit enableToolbar(false);

	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);
#ifndef SUBSURFACE_MOBILE
	toolTipItem->setVisible(false);
	diveCeiling->setVisible(false);
	decoModelParameters->setVisible(false);
	rulerItem->setVisible(false);
	ambPressureItem->setVisible(false);
	gflineItem->setVisible(false);
	mouseFollowerHorizontal->setVisible(false);
	mouseFollowerVertical->setVisible(false);
	heartBeatAxis->setVisible(false);
	heartBeatItem->setVisible(false);
#endif

#ifndef SUBSURFACE_MOBILE
	hideAll(allTissues);
	hideAll(allPercentages);
	hideAll(handles);
#endif
	hideAll(eventItems);
	hideAll(gases);
}

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

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

	emit enableShortcuts();

	currentState = PROFILE;
	emit enableToolbar(true);
	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);
#ifndef SUBSURFACE_MOBILE
	toolTipItem->readPos();
	toolTipItem->setVisible(true);
	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->setLine(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->setLine(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);
	}
#ifndef SUBSURFACE_MOBILE
	pn2GasItem->setVisible(prefs.pp_graphs.pn2);
	po2GasItem->setVisible(prefs.pp_graphs.po2);
	pheGasItem->setVisible(prefs.pp_graphs.phe);

	bool setpointflag = current_dive && (current_dc->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 && (current_dc->no_o2sensors > 1));
	ccrsensor3GasItem->setVisible(sensorflag && (current_dc->no_o2sensors > 2));
	ocpo2GasItem->setVisible(current_dive && (current_dc->divemode == PSCR) && prefs.show_scr_ocpo2);

	heartBeatItem->setVisible(prefs.hrgraph);
	diveCeiling->setVisible(prefs.calcceiling);
	decoModelParameters->setVisible(prefs.calcceiling);

	if (prefs.calcalltissues) {
		Q_FOREACH (DiveCalculatedTissue *tissue, allTissues) {
			tissue->setVisible(true);
		}
	}
	if (prefs.percentagegraph) {
		Q_FOREACH (DivePercentageItem *percentage, allPercentages) {
			percentage->setVisible(true);
		}
	}

	rulerItem->setVisible(prefs.rulergraph);

#endif
	timeAxis->setPos(itemPos.time.pos.on);
	timeAxis->setLine(itemPos.time.expanded);

	cylinderPressureAxis->setPos(itemPos.cylinder.pos.on);
	meanDepthItem->setVisible(prefs.show_average_depth);

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

	reportedCeiling->setVisible(prefs.dcceiling);

	tankItem->setVisible(prefs.tankbar);
	tankItem->setPos(itemPos.tankBar.on);

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

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::clearHandlers()
{
	if (handles.count()) {
		foreach (DiveHandler *handle, handles) {
			scene()->removeItem(handle);
			delete handle;
		}
		handles.clear();
	}
}

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

void ProfileWidget2::setAddState()
{
	if (currentState == ADD)
		return;

	clearHandlers();
	setProfileState();
	mouseFollowerHorizontal->setVisible(true);
	mouseFollowerVertical->setVisible(true);
	mouseFollowerHorizontal->setLine(timeAxis->line());
	mouseFollowerVertical->setLine(QLineF(0, profileYAxis->pos().y(), 0, timeAxis->pos().y()));
	disconnectTemporaryConnections();
	emit disableShortcuts(false);
	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);

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	connect(plannerModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(replot()));
	connect(plannerModel, SIGNAL(cylinderModelEdited()), this, SLOT(replot()));
#ifndef SUBSURFACE_MOBILE
	connect(plannerModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
		this, SLOT(pointInserted(const QModelIndex &, int, int)));
	connect(plannerModel, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
		this, SLOT(pointsRemoved(const QModelIndex &, int, int)));
#endif
	/* show the same stuff that the profile shows. */
	currentState = ADD; /* enable the add state. */
	diveCeiling->setVisible(true);
	decoModelParameters->setVisible(true);
	setBackgroundBrush(QColor("#A7DCFF"));
}

void ProfileWidget2::setPlanState()
{
	if (currentState == PLAN)
		return;

	setProfileState();
	mouseFollowerHorizontal->setVisible(true);
	mouseFollowerVertical->setVisible(true);
	mouseFollowerHorizontal->setLine(timeAxis->line());
	mouseFollowerVertical->setLine(QLineF(0, profileYAxis->pos().y(), 0, timeAxis->pos().y()));
	disconnectTemporaryConnections();
	emit disableShortcuts(true);
	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);

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	connect(plannerModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(replot()));
	connect(plannerModel, SIGNAL(cylinderModelEdited()), this, SLOT(replot()));
	connect(plannerModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
		this, SLOT(pointInserted(const QModelIndex &, int, int)));
	connect(plannerModel, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
		this, SLOT(pointsRemoved(const QModelIndex &, int, int)));
	/* show the same stuff that the profile shows. */
	currentState = PLAN; /* enable the add state. */
	diveCeiling->setVisible(true);
	decoModelParameters->setVisible(true);
	setBackgroundBrush(QColor("#D7E3EF"));
}
#endif

extern struct ev_select *ev_namelist;
extern int evn_allocated;
extern int evn_used;

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

struct plot_data *ProfileWidget2::getEntryFromPos(QPointF pos)
{
	// find the time stamp corresponding to the mouse position
	int seconds = lrint(timeAxis->valueAt(pos));
	struct plot_data *entry = NULL;

	for (int i = 0; i < plotInfo.nr; i++) {
		entry = plotInfo.entry + i;
		if ((int)entry->sec >= seconds)
			break;
	}
	return entry;
}

void ProfileWidget2::setReplot(bool state)
{
	replotEnabled = state;
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::contextMenuEvent(QContextMenuEvent *event)
{
	if (currentState == ADD || currentState == PLAN) {
		QGraphicsView::contextMenuEvent(event);
		return;
	}
	QMenu m;
	bool isDCName = false;
	if (selected_dive == -1)
		return;
	// figure out if we are ontop of the dive computer name in the profile
	QGraphicsItem *sceneItem = itemAt(mapFromGlobal(event->globalPos()));
	if (sceneItem) {
		QGraphicsItem *parentItem = sceneItem;
		while (parentItem) {
			if (parentItem->data(SUBSURFACE_OBJ_DATA) == SUBSURFACE_OBJ_DC_TEXT) {
				isDCName = true;
				break;
			}
			parentItem = parentItem->parentItem();
		}
		if (isDCName) {
			if (dc_number == 0 && count_divecomputers() == 1)
				// nothing to do, can't delete or reorder
				return;
			// create menu to show when right clicking on dive computer name
			if (dc_number > 0)
				m.addAction(tr("Make first dive computer"), this, SLOT(makeFirstDC()));
			if (count_divecomputers() > 1)
				m.addAction(tr("Delete this dive computer"), this, SLOT(deleteCurrentDC()));
			m.exec(event->globalPos());
			// don't show the regular profile context menu
			return;
		}
	}
	// create the profile context menu
	GasSelectionModel *model = GasSelectionModel::instance();
	model->repopulate();
	int rowCount = model->rowCount();
	if (rowCount > 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 < rowCount; i++) {
			QAction *action = new QAction(&m);
			action->setText(model->data(model->index(i, 0), Qt::DisplayRole).toString() + QString(tr(" (cyl. %1)")).arg(i + 1));
			connect(action, SIGNAL(triggered(bool)), this, SLOT(changeGas()));
			action->setData(event->globalPos());
			gasChange->addAction(action);
		}
	}
	QAction *setpointAction = m.addAction(tr("Add setpoint change"), this, SLOT(addSetpointChange()));
	setpointAction->setData(event->globalPos());
	QAction *action = m.addAction(tr("Add bookmark"), this, SLOT(addBookmark()));
	action->setData(event->globalPos());
	QAction *splitAction = m.addAction(tr("Split dive into two"), this, SLOT(splitDive()));
	splitAction->setData(event->globalPos());
	struct event *ev = NULL;
	enum divemode_t divemode = UNDEF_COMP_TYPE;
	QPointF scenePos = mapToScene(mapFromGlobal(event->globalPos()));
	QString gas = action->text();
	qreal sec_val = timeAxis->valueAt(scenePos);
	int seconds = (sec_val < 0.0) ? 0 : (int)sec_val;

	get_current_divemode(current_dc, seconds, &ev, &divemode);
	QMenu *changeMode = m.addMenu(tr("Change divemode"));
	if (divemode != OC) {
		QAction *action = new QAction(&m);
		action->setText(gettextFromC::tr(divemode_text_ui[OC]));
		connect(action, SIGNAL(triggered(bool)), this, SLOT(addDivemodeSwitch()));
		action->setData(event->globalPos());
		changeMode->addAction(action);
	}
	if (divemode != CCR) {
		QAction *action = new QAction(&m);
		action->setText(gettextFromC::tr(divemode_text_ui[CCR]));
		connect(action, SIGNAL(triggered(bool)), this, SLOT(addDivemodeSwitch()));
		action->setData(event->globalPos());
		changeMode->addAction(action);
	}
	if (divemode != PSCR) {
		QAction *action = new QAction(&m);
		action->setText(gettextFromC::tr(divemode_text_ui[PSCR]));
		connect(action, SIGNAL(triggered(bool)), this, SLOT(addDivemodeSwitch()));
		action->setData(event->globalPos());
		changeMode->addAction(action);
	}

	if (same_string(current_dc->model, "manually added dive"))
		m.addAction(tr("Edit the profile"), this, SIGNAL(editCurrentDive()));

	if (DiveEventItem *item = dynamic_cast<DiveEventItem *>(sceneItem)) {
		action = new QAction(&m);
		action->setText(tr("Remove event"));
		action->setData(QVariant::fromValue<void *>(item)); // so we know what to remove.
		connect(action, SIGNAL(triggered(bool)), this, SLOT(removeEvent()));
		m.addAction(action);
		action = new QAction(&m);
		action->setText(tr("Hide similar events"));
		action->setData(QVariant::fromValue<void *>(item));
		connect(action, SIGNAL(triggered(bool)), this, SLOT(hideEvents()));
		m.addAction(action);
		struct event *dcEvent = item->getEvent();
		if (dcEvent->type == SAMPLE_EVENT_BOOKMARK) {
			action = new QAction(&m);
			action->setText(tr("Edit name"));
			action->setData(QVariant::fromValue<void *>(item));
			connect(action, SIGNAL(triggered(bool)), this, SLOT(editName()));
			m.addAction(action);
		}
#if 0 // FIXME::: FINISH OR DISABLE
		QPointF scenePos = mapToScene(event->pos());
		struct plot_data *entry = 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";
			struct plot_data *gasChangeEntry = entry;
			struct plot_data *newGasEntry;
			while (gasChangeEntry > plotInfo.entry) {
				--gasChangeEntry;
				if (gasChangeEntry->sec <= dcEvent->time.seconds)
					break;
			}
			qDebug() << "at gas change at" << gasChangeEntry->sec << ": sensor pressure" << gasChangeEntry->pressure[0] << "interpolated" << gasChangeEntry->pressure[1];
			// 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 (gasChangeEntry + 1 <= plotInfo.entry + plotInfo.nr) {
				newGasEntry = gasChangeEntry + 1;
				qDebug() << "after gas change at " << newGasEntry->sec << ": sensor pressure" << newGasEntry->pressure[0] << "interpolated" << newGasEntry->pressure[1];
				if (SENSOR_PRESSURE(gasChangeEntry) == 0 || displayed_dive.cylinder[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 = INTERPOLATED_PRESSURE(gasChangeEntry) ? : SENSOR_PRESSURE(gasChangeEntry);
					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 (SENSOR_PRESSURE(newGasEntry) == 0 || displayed_dive.cylinder[newGasEntry->sensor[0]].sample_start.mbar == 0) {
					// we only have interpolated press -- see commend above
					pressure_t pressure;
					pressure.mbar = INTERPOLATED_PRESSURE(newGasEntry) ? : SENSOR_PRESSURE(newGasEntry);
					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) {
		action = m.addAction(tr("Unhide all events"), this, SLOT(unhideEvents()));
		action->setData(event->globalPos());
	}
	m.exec(event->globalPos());
}

void ProfileWidget2::deleteCurrentDC()
{
	delete_current_divecomputer();
	mark_divelist_changed(true);
	// we need to force it since it's likely the same dive and same dc_number - but that's a different dive computer now
	plotDive(0, true, false);

	emit refreshDisplay(true);
}

void ProfileWidget2::makeFirstDC()
{
	make_first_dc();
	mark_divelist_changed(true);
	// this is now the first DC, so we need to redraw the profile and refresh the dive list
	// (and no, it's not just enough to rewrite the text - the first DC is special so values in the
	// dive list may change).
	// As a side benefit, this returns focus to the dive list.
	dc_number = 0;
	emit refreshDisplay(true);
}

void ProfileWidget2::hideEvents()
{
	QAction *action = qobject_cast<QAction *>(sender());
	DiveEventItem *item = static_cast<DiveEventItem *>(action->data().value<void *>());
	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()
{
	QAction *action = qobject_cast<QAction *>(sender());
	DiveEventItem *item = static_cast<DiveEventItem *>(action->data().value<void *>());
	struct event *event = item->getEvent();

	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) {
		remove_event(event);
		invalidate_dive_cache(current_dive);
		mark_divelist_changed(true);
		replot();
	}
}

void ProfileWidget2::addBookmark()
{
	QAction *action = qobject_cast<QAction *>(sender());
	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
	add_event(current_dc, lrint(timeAxis->valueAt(scenePos)), SAMPLE_EVENT_BOOKMARK, 0, 0, "bookmark");
	invalidate_dive_cache(current_dive);
	mark_divelist_changed(true);
	replot();
}

void ProfileWidget2::addDivemodeSwitch()
{
	int i;
	QAction *action = qobject_cast<QAction *>(sender());
	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
	for (i = 0; i < UNDEF_COMP_TYPE; i++)
		if (gettextFromC::tr(divemode_text_ui[i]) == action->text())
			add_event(current_dc, lrint(timeAxis->valueAt(scenePos)), 8, 0, i,
				QT_TRANSLATE_NOOP("gettextFromC", "modechange"));
	invalidate_dive_cache(current_dive);
	mark_divelist_changed(true);
	replot();
}

void ProfileWidget2::addSetpointChange()
{
	QAction *action = qobject_cast<QAction *>(sender());
	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
	SetpointDialog::instance()->setpointData(current_dc, lrint(timeAxis->valueAt(scenePos)));
	SetpointDialog::instance()->show();
}

void ProfileWidget2::splitDive()
{
	QAction *action = qobject_cast<QAction *>(sender());
	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
	duration_t time;
	time.seconds = lrint(timeAxis->valueAt((scenePos)));
	split_dive_at_time(&displayed_dive, time);
	emit updateDiveInfo(false);
	mark_divelist_changed(true);
	replot();
	MainWindow::instance()->refreshProfile();
	MainWindow::instance()->refreshDisplay();
}

void ProfileWidget2::changeGas()
{
	QAction *action = qobject_cast<QAction *>(sender());
	QPointF scenePos = mapToScene(mapFromGlobal(action->data().toPoint()));
	QString gas = action->text();
	gas.remove(QRegExp(" \\(.*\\)"));

	// backup the things on the dataModel, since we will clear that out.
	struct gasmix gasmix;
	qreal sec_val = timeAxis->valueAt(scenePos);

	// no gas changes before the dive starts
	int seconds = (sec_val < 0.0) ? 0 : (int)sec_val;

	// if there is a gas change at this time stamp, remove it before adding the new one
	struct event *gasChangeEvent = current_dc->events;
	while ((gasChangeEvent = get_next_event(gasChangeEvent, "gaschange")) != NULL) {
		if (gasChangeEvent->time.seconds == seconds) {
			remove_event(gasChangeEvent);
			gasChangeEvent = current_dc->events;
		} else {
			gasChangeEvent = gasChangeEvent->next;
		}
	}
	validate_gas(qPrintable(gas), &gasmix);
	QRegExp rx("\\(\\D*(\\d+)");
	int tank;
	if (rx.indexIn(action->text()) > -1) {
		tank = rx.cap(1).toInt() - 1; // we display the tank 1 based
	} else {
		qDebug() << "failed to parse tank number";
		tank = get_gasidx(&displayed_dive, &gasmix);
	}
	// add this both to the displayed dive and the current dive
	add_gas_switch_event(current_dive, current_dc, seconds, tank);
	add_gas_switch_event(&displayed_dive, get_dive_dc(&displayed_dive, dc_number), seconds, tank);
	// this means we potentially have a new tank that is being used and needs to be shown
	fixup_dive(&displayed_dive);
	invalidate_dive_cache(current_dive);

	// FIXME - this no longer gets written to the dive list - so we need to enableEdition() here

	emit updateDiveInfo(false);
	mark_divelist_changed(true);
	replot();
}
#endif

bool ProfileWidget2::getPrintMode()
{
	return printMode;
}

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()
{
	if (printMode)
		return fontPrintScale;
	else
		return 1.0;
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::editName()
{
	QAction *action = qobject_cast<QAction *>(sender());
	DiveEventItem *item = static_cast<DiveEventItem *>(action->data().value<void *>());
	struct event *event = item->getEvent();
	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;
		}
		// order is important! first update the current dive (by matching the unchanged event),
		// then update the displayed dive (as event is part of the events on displayed dive
		// and will be freed as part of changing the name!
		update_event_name(current_dive, event, qPrintable(newName));
		update_event_name(&displayed_dive, event, qPrintable(newName));
		invalidate_dive_cache(current_dive);
		mark_divelist_changed(true);
		replot();
	}
}
#endif

void ProfileWidget2::disconnectTemporaryConnections()
{
#ifndef SUBSURFACE_MOBILE
	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	disconnect(plannerModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(replot()));
	disconnect(plannerModel, SIGNAL(cylinderModelEdited()), this, SLOT(replot()));

	disconnect(plannerModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
		   this, SLOT(pointInserted(const QModelIndex &, int, int)));
	disconnect(plannerModel, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
		   this, SLOT(pointsRemoved(const QModelIndex &, int, int)));
#endif
	Q_FOREACH (QAction *action, actionsForKeys.values()) {
		action->setShortcut(QKeySequence());
		action->setShortcutContext(Qt::WidgetShortcut);
	}
}

#ifndef SUBSURFACE_MOBILE
void ProfileWidget2::pointInserted(const QModelIndex&, int, int)
{
	DiveHandler *item = new DiveHandler();
	scene()->addItem(item);
	handles << item;

	connect(item, SIGNAL(moved()), this, SLOT(recreatePlannedDive()));
	connect(item, SIGNAL(clicked()), this, SLOT(divePlannerHandlerClicked()));
	connect(item, SIGNAL(released()), this, SLOT(divePlannerHandlerReleased()));
	QGraphicsSimpleTextItem *gasChooseBtn = new QGraphicsSimpleTextItem();
	scene()->addItem(gasChooseBtn);
	gasChooseBtn->setZValue(10);
	gasChooseBtn->setFlag(QGraphicsItem::ItemIgnoresTransformations);
	gases << gasChooseBtn;
	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	if (plannerModel->recalcQ())
		replot();
}

void ProfileWidget2::pointsRemoved(const QModelIndex &, int start, int end)
{ // start and end are inclusive.
	int num = (end - start) + 1;
	for (int i = num; i != 0; i--) {
		delete handles.back();
		handles.pop_back();
		delete gases.back();
		gases.pop_back();
	}
	scene()->clearSelection();
	replot();
}

void ProfileWidget2::repositionDiveHandlers()
{
	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	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.at(i);
		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);
		gases[i]->setText(get_gas_string(displayed_dive.cylinder[datapoint.cylinderid].gasmix));
		gases[i]->setVisible(datapoint.entered &&
				(i == 0 || gases[i]->text() != gases[i-1]->text()));
	}
}

int ProfileWidget2::fixHandlerIndex(DiveHandler *activeHandler)
{
	int index = handles.indexOf(activeHandler);
	if (index > 0 && index < handles.count() - 1) {
		DiveHandler *before = handles[index - 1];
		if (before->pos().x() > activeHandler->pos().x()) {
			handles.swap(index, index - 1);
			return index - 1;
		}
		DiveHandler *after = handles[index + 1];
		if (after->pos().x() < activeHandler->pos().x()) {
			handles.swap(index, index + 1);
			return index + 1;
		}
	}
	return index;
}

void ProfileWidget2::recreatePlannedDive()
{
	DiveHandler *activeHandler = qobject_cast<DiveHandler *>(sender());
	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	int index = fixHandlerIndex(activeHandler);
	int mintime = 0;
	int maxtime = plannerModel->at(plannerModel->size() - 1).time * 3 / 2;
	if (index > 0)
		mintime = plannerModel->at(index - 1).time;
	if (index < plannerModel->size() - 1)
		maxtime = plannerModel->at(index + 1).time;

	int minutes = lrint(timeAxis->valueAt(activeHandler->pos()) / 60);
	if (minutes * 60 <= mintime || minutes * 60 >= maxtime)
		return;
	if (minutes * 60 > timeAxis->maximum() * 0.9)
		timeAxis->setMaximum(timeAxis->maximum() * 1.02);

	divedatapoint data = plannerModel->at(index);
	depth_t oldDepth = data.depth;
	int oldtime = data.time;
	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()));

	if (data.depth.mm != oldDepth.mm || data.time != oldtime)
		plannerModel->editStop(index, data);
}

void ProfileWidget2::keyDownAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	bool oldRecalc = plannerModel->setRecalc(false);

	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handles.indexOf(handler);
			divedatapoint dp = plannerModel->at(row);
			if (dp.depth.mm >= profileYAxis->maximum())
				continue;

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

void ProfileWidget2::keyUpAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	bool oldRecalc = plannerModel->setRecalc(false);
	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handles.indexOf(handler);
			divedatapoint dp = plannerModel->at(row);

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

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

void ProfileWidget2::keyLeftAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	bool oldRecalc = plannerModel->setRecalc(false);
	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handles.indexOf(handler);
			divedatapoint dp = plannerModel->at(row);

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

			// don't overlap positions.
			// maybe this is a good place for a 'goto'?
			double xpos = timeAxis->posAtValue((dp.time - 60) / 60);
			bool nextStep = false;
			Q_FOREACH (DiveHandler *h, handles) {
				if (IS_FP_SAME(h->pos().x(), xpos)) {
					nextStep = true;
					break;
				}
			}
			if (nextStep)
				continue;

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

void ProfileWidget2::keyRightAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	bool oldRecalc = plannerModel->setRecalc(false);
	Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
		if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
			int row = handles.indexOf(handler);
			divedatapoint dp = plannerModel->at(row);
			if (dp.time / 60.0 >= timeAxis->maximum())
				continue;

			// don't overlap positions.
			// maybe this is a good place for a 'goto'?
			double xpos = timeAxis->posAtValue((dp.time + 60) / 60);
			bool nextStep = false;
			Q_FOREACH (DiveHandler *h, handles) {
				if (IS_FP_SAME(h->pos().x(), xpos)) {
					nextStep = true;
					break;
				}
			}
			if (nextStep)
				continue;

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

void ProfileWidget2::keyDeleteAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	int selCount = scene()->selectedItems().count();
	if (selCount) {
		QVector<int> selectedIndexes;
		Q_FOREACH (QGraphicsItem *i, scene()->selectedItems()) {
			if (DiveHandler *handler = qgraphicsitem_cast<DiveHandler *>(i)) {
				selectedIndexes.push_back(handles.indexOf(handler));
				handler->hide();
			}
		}
		plannerModel->removeSelectedPoints(selectedIndexes);
	}
}

void ProfileWidget2::keyEscAction()
{
	if (currentState != ADD && currentState != PLAN)
		return;

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

	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
	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(GF_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, QGraphicsScene *scene) : offset(offsetIn),
	duration(duration_t {0}),
	filename(filenameIn),
	thumbnail(new DivePictureItem)
{
	int size = Thumbnailer::defaultThumbnailSize();
	scene->addItem(thumbnail.get());
	thumbnail->setVisible(prefs.show_pictures_in_profile);
	QImage img = Thumbnailer::instance()->fetchThumbnail(filename).scaled(size, size, Qt::KeepAspectRatio);
	thumbnail->setPixmap(QPixmap::fromImage(img));
	thumbnail->setFileUrl(filename);
}

// 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()
{
	pictures.clear();
	if (currentState == ADD || currentState == PLAN)
		return;

	// Fetch all pictures of the current 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 current_dive being null gracefully.
	FOR_EACH_PICTURE(current_dive) {
		if (picture->offset.seconds > 0 && picture->offset.seconds <= current_dive->duration.seconds)
			pictures.emplace_back(picture->offset, QString(picture->filename), scene());
	}
	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.
// TODO: This does not check for the fact that the same image may be attributed
// to different dives! Deleting the picture from one dive may therefore remove
// it from the profile of a different dive.
void ProfileWidget2::removePictures(const 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();
}

#endif

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

		QString filename;
		int diveId;
		dataStream >> filename >> diveId;

		// If the id of the drag & dropped picture belongs to a different dive, then
		// the offset we determine makes no sense what so ever. Simply ignore such an event.
		// In the future, we might think about duplicating the picture or moving the picture
		// from one dive to the other.
		if (!current_dive || displayed_dive.id != diveId) {
			event->ignore();
			return;
		}

#ifndef SUBSURFACE_MOBILE
		// Calculate time in dive where picture was dropped and whether the new position is during the dive.
		QPointF mappedPos = mapToScene(event->pos());
		offset_t offset { (int32_t)lrint(timeAxis->valueAt(mappedPos)) };
		bool duringDive = current_dive && offset.seconds > 0 && offset.seconds < current_dive->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, scene());
				updateThumbnailXPos(*newPos);
				calculatePictureYPositions();
			}
		}

		// Only signal the drag&drop action if the picture actually belongs to the dive.
		DivePictureModel::instance()->updateDivePictureOffset(displayed_dive.id, filename, offset.seconds);
#endif

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

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();
	}
}