Make gradient factor text an independent item on the profile

Having it as part of the DiveCalculatedCeiling class caused us to manage
this text 17 times (and plotting it 17 times) which is rather silly.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/profile/diveprofileitem.cpp

@@ -788,11 +788,8 @@ void DiveGasPressureItem::paint(QPainter *painter, const QStyleOptionGraphicsIte
 	painter->restore();
 }
 
-DiveCalculatedCeiling::DiveCalculatedCeiling() : is3mIncrement(false), gradientFactor(new DiveTextItem(this))
+DiveCalculatedCeiling::DiveCalculatedCeiling() : is3mIncrement(false)
 {
-	gradientFactor->setY(0);
-	gradientFactor->setBrush(getColor(PRESSURE_TEXT));
-	gradientFactor->setAlignment(Qt::AlignHCenter | Qt::AlignBottom);
 	settingsChanged();
 }
 
@@ -821,15 +818,6 @@ void DiveCalculatedCeiling::modelDataChanged(const QModelIndex &topLeft, const Q
 	pat.setColorAt(1, getColor(CALC_CEILING_DEEP));
 	setPen(QPen(QBrush(Qt::NoBrush), 0));
 	setBrush(pat);
-
-	gradientFactor->setX(poly.boundingRect().width() / 2 + poly.boundingRect().x());
-	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
-	if (plannerModel->isPlanner()) {
-		struct diveplan &diveplan = plannerModel->getDiveplan();
-		gradientFactor->setText(QString("GF %1/%2").arg(diveplan.gflow).arg(diveplan.gfhigh));
-	} else {
-		gradientFactor->setText(QString("GF %1/%2").arg(prefs.gflow).arg(prefs.gfhigh));
-	}
 }
 
 void DiveCalculatedCeiling::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

qt-ui/profile/diveprofileitem.h

@@ -187,7 +187,6 @@ slots:
 
 private:
 	bool is3mIncrement;
-	DiveTextItem *gradientFactor;
 };
 
 class DiveReportedCeiling : public AbstractProfilePolygonItem {

qt-ui/profile/profilewidget2.cpp

@@ -87,6 +87,7 @@ ProfileWidget2::ProfileWidget2(QWidget *parent) : QGraphicsView(parent),
 	gasPressureItem(new DiveGasPressureItem()),
 	diveComputerText(new DiveTextItem()),
 	diveCeiling(new DiveCalculatedCeiling()),
+	gradientFactor(new DiveTextItem()),
 	reportedCeiling(new DiveReportedCeiling()),
 	pn2GasItem(new PartialPressureGasItem()),
 	pheGasItem(new PartialPressureGasItem()),
@@ -200,6 +201,7 @@ void ProfileWidget2::addItemsToScene()
 	diveComputerText->setData(SUBSURFACE_OBJ_DATA, SUBSURFACE_OBJ_DC_TEXT);
 	scene()->addItem(diveComputerText);
 	scene()->addItem(diveCeiling);
+	scene()->addItem(gradientFactor);
 	scene()->addItem(reportedCeiling);
 	scene()->addItem(pn2GasItem);
 	scene()->addItem(pheGasItem);
@@ -283,6 +285,12 @@ void ProfileWidget2::setupItemOnScene()
 	rulerItem->setAxis(timeAxis, profileYAxis);
 	tankItem->setHorizontalAxis(timeAxis);
 
+	// show the gradient factor at the top in the center
+	gradientFactor->setY(0);
+	gradientFactor->setX(50);
+	gradientFactor->setBrush(getColor(PRESSURE_TEXT));
+	gradientFactor->setAlignment(Qt::AlignHCenter | Qt::AlignBottom);
+
 	setupItem(reportedCeiling, timeAxis, profileYAxis, dataModel, DivePlotDataModel::CEILING, DivePlotDataModel::TIME, 1);
 	setupItem(diveCeiling, timeAxis, profileYAxis, dataModel, DivePlotDataModel::CEILING, DivePlotDataModel::TIME, 1);
 	for (int i = 0; i < 16; i++) {
@@ -489,13 +497,16 @@ void ProfileWidget2::plotDive(struct dive *d, bool force)
 
 		// this copies the dive and makes copies of all the relevant additional data
 		copy_dive(d, &displayed_dive);
+		gradientFactor->setText(QString("GF %1/%2").arg(prefs.gflow).arg(prefs.gfhigh));
 	} else {
 		DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
 		plannerModel->createTemporaryPlan();
-		if (!plannerModel->getDiveplan().dp) {
+		struct diveplan &diveplan = plannerModel->getDiveplan();
+		if (!diveplan.dp) {
 			plannerModel->deleteTemporaryPlan();
 			return;
 		}
+		gradientFactor->setText(QString("GF %1/%2").arg(diveplan.gflow).arg(diveplan.gfhigh));
 	}
 
 	// special handling for the first time we display things
@@ -894,6 +905,7 @@ void ProfileWidget2::setEmptyState()
 	toolTipItem->setVisible(false);
 	diveComputerText->setVisible(false);
 	diveCeiling->setVisible(false);
+	gradientFactor->setVisible(false);
 	reportedCeiling->setVisible(false);
 	rulerItem->setVisible(false);
 	tankItem->setVisible(false);
@@ -1020,6 +1032,7 @@ void ProfileWidget2::setProfileState()
 	diveComputerText->setPos(itemPos.dcLabel.on);
 
 	diveCeiling->setVisible(prefs.calcceiling);
+	gradientFactor->setVisible(prefs.calcceiling);
 	reportedCeiling->setVisible(prefs.dcceiling);
 
 	if (prefs.calcalltissues) {
@@ -1097,6 +1110,7 @@ void ProfileWidget2::setAddState()
 	/* show the same stuff that the profile shows. */
 	currentState = ADD; /* enable the add state. */
 	diveCeiling->setVisible(true);
+	gradientFactor->setVisible(true);
 	setBackgroundBrush(QColor("#A7DCFF"));
 }
 
@@ -1130,6 +1144,7 @@ void ProfileWidget2::setPlanState()
 	/* show the same stuff that the profile shows. */
 	currentState = PLAN; /* enable the add state. */
 	diveCeiling->setVisible(true);
+	gradientFactor->setVisible(true);
 	setBackgroundBrush(QColor("#D7E3EF"));
 }
 

qt-ui/profile/profilewidget2.h

@@ -167,6 +167,7 @@ private:
 	QList<DiveEventItem *> eventItems;
 	DiveTextItem *diveComputerText;
 	DiveCalculatedCeiling *diveCeiling;
+	DiveTextItem *gradientFactor;
 	QList<DiveCalculatedTissue *> allTissues;
 	DiveReportedCeiling *reportedCeiling;
 	PartialPressureGasItem *pn2GasItem;