profile: merge plotDive() into draw() call

Rendering resets the size, which now recalculates the axes.
Therefore, plotDive() must be called. The callers were doing
the opposite: call plotDive() first, then draw().

To make it easier for the callers, present a single interface
that handles these subtleties.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

backend-shared/exportfuncs.cpp

@@ -41,11 +41,10 @@ static constexpr int profileHeight = 600 * profileScale;
 
 static void exportProfile(ProfileScene *profile, const struct dive *dive, const QString &filename)
 {
-	profile->plotDive(dive, 0, nullptr, false, true);
 	QImage image = QImage(QSize(profileWidth, profileHeight), QImage::Format_RGB32);
 	QPainter paint;
 	paint.begin(&image);
-	profile->draw(&paint, QRect(0, 0, profileWidth, profileHeight));
+	profile->draw(&paint, QRect(0, 0, profileWidth, profileHeight), dive, 0, nullptr, false);
 	image.save(filename);
 }
 

desktop-widgets/diveplanner.cpp

@@ -610,8 +610,7 @@ void PlannerWidgets::printDecoPlan()
 	painter.setRenderHint(QPainter::SmoothPixmapTransform);
 
 	auto profile = std::make_unique<ProfileScene>(1.0, true, false);
-	profile->plotDive(&displayed_dive, 0, DivePlannerPointsModel::instance(), true, true);
-	profile->draw(&painter, QRect(0, 0, pixmap.width(), pixmap.height()));
+	profile->draw(&painter, QRect(0, 0, pixmap.width(), pixmap.height()), &displayed_dive, 0, DivePlannerPointsModel::instance(), true);
 
 	QByteArray byteArray;
 	QBuffer buffer(&byteArray);

desktop-widgets/printer.cpp

@@ -38,8 +38,7 @@ void Printer::putProfileImage(const QRect &profilePlaceholder, const QRect &view
 	// use the placeHolder and the viewPort position to calculate the relative position of the dive profile.
 	QRect pos(x, y, profilePlaceholder.width(), profilePlaceholder.height());
 
-	profile->plotDive(dive, 0, nullptr, true);
-	profile->draw(painter, pos);
+	profile->draw(painter, pos, dive, 0, nullptr, false);
 }
 
 void Printer::flowRender()

profile-widget/profilescene.cpp

@@ -530,19 +530,21 @@ void ProfileScene::plotDive(const struct dive *dIn, int dcIn, DivePlannerPointsM
 	diveComputerText->set(dcText, getColor(TIME_TEXT, isGrayscale));
 }
 
-QImage ProfileScene::toImage(QSize size)
+void ProfileScene::draw(QPainter *painter, const QRect &pos,
+			const struct dive *d, int dc,
+			DivePlannerPointsModel *plannerModel, bool inPlanner)
 {
-	// The size of chart with respect to the scene is fixed - by convention - to 100.0.
-	// We add 2% to the height so that the dive computer name is not cut off.
-	QRectF sceneRect(0.0, 0.0, 100.0, 102.0);
+	QSize size = pos.size();
+	resize(QSizeF(size));
+	plotDive(d, dc, plannerModel, inPlanner, true, true);
 
-	QImage image(size, QImage::Format_ARGB32);
+	QImage image(pos.size(), QImage::Format_ARGB32);
 	image.fill(getColor(::BACKGROUND, isGrayscale));
 
 	QPainter imgPainter(&image);
 	imgPainter.setRenderHint(QPainter::Antialiasing);
 	imgPainter.setRenderHint(QPainter::SmoothPixmapTransform);
-	render(&imgPainter, QRect(QPoint(), size), sceneRect, Qt::IgnoreAspectRatio);
+	render(&imgPainter, QRect(QPoint(), size), sceneRect(), Qt::IgnoreAspectRatio);
 	imgPainter.end();
 
 	if (isGrayscale) {
@@ -556,12 +558,5 @@ QImage ProfileScene::toImage(QSize size)
 			}
 		}
 	}
-
-	return image;
-}
-
-void ProfileScene::draw(QPainter *painter, const QRect &pos)
-{
-	QImage img = toImage(pos.size());
-	painter->drawImage(pos, img);
+	painter->drawImage(pos, image);
 }

profile-widget/profilescene.h

@@ -48,8 +48,9 @@ public:
 	void plotDive(const struct dive *d, int dc, DivePlannerPointsModel *plannerModel = nullptr, bool inPlanner = false,
 		      bool instant = false, bool calcMax = true);
 
-	void draw(QPainter *painter, const QRect &pos);
-	QImage toImage(QSize size);
+	void draw(QPainter *painter, const QRect &pos,
+		  const struct dive *d, int dc,
+		  DivePlannerPointsModel *plannerModel = nullptr, bool inPlanner = false);
 
 	const struct dive *d;
 	int dc;

profile-widget/qmlprofile.cpp

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.
 #include "qmlprofile.h"
 #include "profilescene.h"
 #include "mobile-widgets/qmlmanager.h"
@@ -54,7 +54,12 @@ void QMLProfile::paint(QPainter *painter)
 
 	// let's look at the intended size of the content and scale our scene accordingly
 	QRect painterRect = painter->viewport();
-	m_profileWidget->draw(painter, painterRect);
+	if (m_diveId < 0)
+		return;
+	struct dive *d = get_dive_by_uniq_id(m_diveId);
+	if (!d)
+		return;
+	m_profileWidget->draw(painter, painterRect, d, dc_number, nullptr, false);
 }
 
 void QMLProfile::setMargin(int margin)
@@ -67,22 +72,9 @@ int QMLProfile::diveId() const
 	return m_diveId;
 }
 
-void QMLProfile::updateProfile()
-{
-	struct dive *d = get_dive_by_uniq_id(m_diveId);
-	if (!d)
-		return;
-	if (verbose)
-		qDebug() << "update profile for dive #" << d->number << "offeset" << QString::number(m_xOffset, 'f', 1) << "/" << QString::number(m_yOffset, 'f', 1);
-	m_profileWidget->plotDive(d, dc_number);
-}
-
 void QMLProfile::setDiveId(int diveId)
 {
 	m_diveId = diveId;
-	if (m_diveId < 0)
-		return;
-	updateProfile();
 }
 
 qreal QMLProfile::devicePixelRatio() const
@@ -129,7 +121,6 @@ void QMLProfile::divesChanged(const QVector<dive *> &dives, DiveField)
 	for (struct dive *d: dives) {
 		if (d->id == m_diveId) {
 			qDebug() << "dive #" << d->number << "changed, trigger profile update";
-			m_profileWidget->plotDive(d, dc_number);
 			triggerUpdate();
 			return;
 		}

profile-widget/qmlprofile.h

@@ -40,7 +40,6 @@ private:
 	int m_margin;
 	qreal m_xOffset, m_yOffset;
 	std::unique_ptr<ProfileScene> m_profileWidget;
-	void updateProfile();
 	void createProfileView();
 
 private slots: