Introduce heat map

This replaces the tissue percentage graph that probably nobody ever
understood with a heat map like the one used in the discussion
of bubble model deco. The information shown is the same but the
saturation is now in the color while the tissue determines the y
position.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

profile-widget/diveprofileitem.cpp

@@ -359,13 +359,7 @@ void DiveHeartrateItem::paint(QPainter *painter, const QStyleOptionGraphicsItem
 
 DivePercentageItem::DivePercentageItem(int i)
 {
-	QPen pen;
+	tissueIndex = i;
-	QColor color;
-	color.setHsl(100 + 10 * i, 200, 100);
-	pen.setBrush(QBrush(color));
-	pen.setCosmetic(true);
-	pen.setWidth(1);
-	setPen(pen);
 	settingsChanged();
 }
 
@@ -380,11 +374,8 @@ void DivePercentageItem::modelDataChanged(const QModelIndex &topLeft, const QMod
 	// Ignore empty values. a heartrate of 0 would be a bad sign.
 	QPolygonF poly;
 	for (int i = 0, modelDataCount = dataModel->rowCount(); i < modelDataCount; i++) {
-		int hr = dataModel->index(i, vDataColumn).data().toInt();
-		if (!hr)
-			continue;
 		sec = dataModel->index(i, hDataColumn).data().toInt();
-		QPointF point(hAxis->posAtValue(sec), vAxis->posAtValue(hr));
+		QPointF point(hAxis->posAtValue(sec), vAxis->posAtValue(64 - 4 * tissueIndex));
 		poly.append(point);
 	}
 	setPolygon(poly);
@@ -401,8 +392,27 @@ void DivePercentageItem::paint(QPainter *painter, const QStyleOptionGraphicsItem
 	if (polygon().isEmpty())
 		return;
 	painter->save();
-	painter->setPen(pen());
+	QColor color;
-	painter->drawPolyline(polygon());
+	QPen mypen;
+	mypen.setCosmetic(true);
+	mypen.setWidth(5);
+	QPolygonF poly = polygon();
+	for (int i = 0, modelDataCount = dataModel->rowCount(); i < modelDataCount; i++) {
+		if (i < poly.count()) {
+			double value = dataModel->index(i, vDataColumn).data().toDouble();
+			if (value < 50.0) {
+				value *= 255.0 / 50.0;
+				color.setRgb(rint(value), 255 - rint(value),0);
+			} else {
+				value = (value - 50.0) * 255.0 / 50.0;
+				color.setRgb(255 - rint(value), 0 , rint(value));
+			}
+
+			mypen.setBrush(QBrush(color));
+			painter->setPen(mypen);
+			painter->drawPoint(poly[i]);
+		}
+	}
 	painter->restore();
 	connect(SettingsObjectWrapper::instance()->techDetails, &TechnicalDetailsSettings::percentageGraphChanged, this, &DivePercentageItem::setVisible);
 }

profile-widget/diveprofileitem.h

@@ -132,6 +132,7 @@ public:
 
 private:
 	QString visibilityKey;
+	int tissueIndex;
 };
 
 class DiveAmbPressureItem : public AbstractProfilePolygonItem {

profile-widget/profilewidget2.cpp

@@ -1159,9 +1159,6 @@ void ProfileWidget2::setProfileState()
 		Q_FOREACH (DivePercentageItem *percentage, allPercentages) {
 			percentage->setVisible(true);
 		}
-
-		ambPressureItem->setVisible(true);
-		gflineItem->setVisible(true);
 	}
 
 	rulerItem->setVisible(prefs.rulergraph);