profile: pass dive to DiveHandler

The DiveHandler shows a context menu where a cylinder can be
chosen. This indirectly accesses the global displayed_dive
variable.

Remove this in a step to make the profile reentrant.

The code was quite ominous: instead of simply generating the
list of cylinders, a global model was reset and then accessed
with Qt's cumbersome model/view API. All this trampling over
global state can be removed by simply making the function
that generates the list globally accessible.

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

core/qthelper.cpp

@@ -1274,6 +1274,23 @@ QString get_gas_string(struct gasmix gas)
 	return result;
 }
 
+QStringList get_dive_gas_list(const struct dive *d)
+{
+	QStringList list;
+	for (int i = 0; i < d->cylinders.nr; i++) {
+		const cylinder_t *cyl = get_cylinder(d, i);
+		/* Check if we have the same gasmix two or more times
+		 * If yes return more verbose string */
+		int same_gas = same_gasmix_cylinder(cyl, i, d, true);
+		if (same_gas == -1)
+			list.push_back(get_gas_string(cyl->gasmix));
+		else
+			list.push_back(get_gas_string(cyl->gasmix) + QString(" (%1 %2 ").arg(gettextFromC::tr("cyl.")).arg(i + 1) +
+				cyl->type.description + ")");
+	}
+	return list;
+}
+
 QString get_taglist_string(struct tag_entry *tag_list)
 {
 	char *buffer = taglist_get_tagstring(tag_list);

core/qthelper.h

@@ -27,6 +27,7 @@ QString weight_string(int weight_in_grams);
 QString distance_string(int distanceInMeters);
 bool gpsHasChanged(struct dive *dive, struct dive *master, const QString &gps_text, bool *parsed_out = 0);
 QString get_gas_string(struct gasmix gas);
+QStringList get_dive_gas_list(const struct dive *d);
 QString get_taglist_string(struct tag_entry *tag_list);
 QStringList stringToList(const QString &s);
 void read_hashes();

profile-widget/divehandler.cpp

@@ -1,15 +1,16 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "divehandler.h"
 #include "profilewidget2.h"
+#include "core/dive.h"
 #include "core/gettextfromc.h"
+#include "core/qthelper.h"
 #include "qt-models/diveplannermodel.h"
-#include "qt-models/models.h"
 
 #include <QMenu>
 #include <QGraphicsSceneMouseEvent>
 #include <QSettings>
 
-DiveHandler::DiveHandler() : QGraphicsEllipseItem()
+DiveHandler::DiveHandler(const struct dive *d) : dive(d)
 {
 	setRect(-5, -5, 10, 10);
 	setFlags(ItemIgnoresTransformations | ItemIsSelectable | ItemIsMovable | ItemSendsGeometryChanges);
@@ -32,12 +33,10 @@ void DiveHandler::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
 	DivePlannerPointsModel *plannerModel = DivePlannerPointsModel::instance();
 	QModelIndex index = plannerModel->index(parentIndex(), DivePlannerPointsModel::GAS);
 	if (index.sibling(index.row() + 1, index.column()).isValid()) {
-		GasSelectionModel *model = GasSelectionModel::instance();
-		model->repopulate();
-		int rowCount = model->rowCount();
-		for (int i = 0; i < rowCount; i++) {
+		QStringList gases = get_dive_gas_list(dive);
+		for (int i = 0; i < gases.size(); i++) {
 			QAction *action = new QAction(&m);
-			action->setText(model->data(model->index(i, 0), Qt::DisplayRole).toString());
+			action->setText(gases[i]);
 			action->setData(i);
 			connect(action, &QAction::triggered, this, &DiveHandler::changeGas);
 			m.addAction(action);

profile-widget/divehandler.h

@@ -5,10 +5,12 @@
 #include <QGraphicsPathItem>
 #include <QElapsedTimer>
 
+struct dive;
+
 class DiveHandler : public QObject, public QGraphicsEllipseItem {
 	Q_OBJECT
 public:
-	DiveHandler();
+	DiveHandler(const struct dive *d);
 
 protected:
 	void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
@@ -26,6 +28,7 @@ slots:
 	void selfRemove();
 	void changeGas();
 private:
+	const struct dive *dive;
 	QElapsedTimer t;
 };
 

profile-widget/profilewidget2.cpp

@@ -1695,7 +1695,7 @@ void ProfileWidget2::disconnectTemporaryConnections()
 #ifndef SUBSURFACE_MOBILE
 void ProfileWidget2::pointInserted(const QModelIndex&, int, int)
 {
-	DiveHandler *item = new DiveHandler();
+	DiveHandler *item = new DiveHandler(&displayed_dive);
 	scene()->addItem(item);
 	handles << item;
 

qt-models/models.cpp

@@ -24,26 +24,9 @@ GasSelectionModel *GasSelectionModel::instance()
 	return &self;
 }
 
-static QStringList getGasList()
-{
-	QStringList list;
-	for (int i = 0; i < displayed_dive.cylinders.nr; i++) {
-		const cylinder_t *cyl = get_cylinder(&displayed_dive, i);
-		/* Check if we have the same gasmix two or more times
-		 * If yes return more verbose string */
-		int same_gas = same_gasmix_cylinder(cyl, i, &displayed_dive, true);
-		if (same_gas == -1)
-			list.push_back(get_gas_string(cyl->gasmix));
-		else
-			list.push_back(get_gas_string(cyl->gasmix) + QString(" (%1 %2 ").arg(GasSelectionModel::tr("cyl.")).arg(i + 1) +
-				cyl->type.description + ")");
-	}
-	return list;
-}
-
 void GasSelectionModel::repopulate()
 {
-	setStringList(getGasList());
+	setStringList(get_dive_gas_list(&displayed_dive));
 }
 
 QVariant GasSelectionModel::data(const QModelIndex &index, int role) const