Undo: implement undo of dive site location editing

Simply copy the code of note editing. It's a bit more complex,
since we have to parse the Gps coordinates. For consitency,
rename the COORD field to LOCATION (the field in the dive_site
struct is called LOCATION).

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

desktop-widgets/command.cpp

@@ -103,6 +103,11 @@ void editDiveSiteCountry(dive_site *ds, const QString &value)
 	execute(new EditDiveSiteCountry(ds, value));
 }
 
+void editDiveSiteLocation(dive_site *ds, const QString &value)
+{
+	execute(new EditDiveSiteLocation(ds, value));
+}
+
 void addDiveSite(const QString &name)
 {
 	execute(new AddDiveSite(name));

desktop-widgets/command.h

@@ -45,6 +45,7 @@ void editDiveSiteName(dive_site *ds, const QString &value);
 void editDiveSiteDescription(dive_site *ds, const QString &value);
 void editDiveSiteNotes(dive_site *ds, const QString &value);
 void editDiveSiteCountry(dive_site *ds, const QString &value);
+void editDiveSiteLocation(dive_site *ds, const QString &value);
 void addDiveSite(const QString &name);
 
 } // namespace Command

desktop-widgets/command_divesite.cpp

@@ -208,4 +208,40 @@ void EditDiveSiteCountry::undo()
 	redo();
 }
 
+// Parse GPS text into location_t
+static location_t parseGpsText(const QString &text)
+{
+	double lat, lon;
+	if (parseGpsText(text, &lat, &lon))
+		return create_location(lat, lon);
+	return { {0}, {0} };
+}
+
+EditDiveSiteLocation::EditDiveSiteLocation(dive_site *dsIn, const QString &location) : ds(dsIn),
+	value(parseGpsText(location))
+{
+	setText(tr("Edit dive site location"));
+}
+
+bool EditDiveSiteLocation::workToBeDone()
+{
+	bool ok = has_location(&value);
+	bool old_ok = has_location(&ds->location);
+	if (ok != old_ok)
+		return true;
+	return ok && !same_location(&value, &ds->location);
+}
+
+void EditDiveSiteLocation::redo()
+{
+	std::swap(value, ds->location);
+	emit diveListNotifier.diveSiteChanged(ds, LocationInformationModel::LOCATION); // Inform frontend of changed dive site.
+}
+
+void EditDiveSiteLocation::undo()
+{
+	// Undo and redo do the same
+	redo();
+}
+
 } // namespace Command

desktop-widgets/command_divesite.h

@@ -92,6 +92,18 @@ private:
 	QString value; // Value to be set
 };
 
+class EditDiveSiteLocation : public Base {
+public:
+	EditDiveSiteLocation(dive_site *ds, const QString &location);
+private:
+	bool workToBeDone() override;
+	void undo() override;
+	void redo() override;
+
+	dive_site *ds;
+	location_t value; // Value to be set
+};
+
 } // namespace Command
 
 #endif // COMMAND_DIVESITE_H

desktop-widgets/locationinformation.cpp

@@ -142,6 +142,15 @@ void LocationInformationWidget::diveSiteChanged(struct dive_site *ds, int field)
 	case LocationInformationModel::TAXONOMY:
 		ui.diveSiteCountry->setText(taxonomy_get_country(&diveSite->taxonomy));
 		return;
+	case LocationInformationModel::LOCATION:
+		filter_model.setCoordinates(diveSite->location);
+		if (has_location(&diveSite->location)) {
+			enableLocationButtons(true);
+			ui.diveSiteCoordinates->setText(printGPSCoords(&diveSite->location));
+		} else {
+			enableLocationButtons(false);
+			ui.diveSiteCoordinates->clear();
+		}
 	default:
 		return;
 	}
@@ -181,14 +190,6 @@ bool parseGpsText(const QString &text, location_t &location)
 
 void LocationInformationWidget::acceptChanges()
 {
-	if (!diveSite) {
-		qWarning() << "did not have valid dive site in LocationInformationWidget";
-		return;
-	}
-
-	if (!ui.diveSiteCoordinates->text().isEmpty())
-		parseGpsText(ui.diveSiteCoordinates->text(), diveSite->location);
-	mark_divelist_changed(true);
 	resetState();
 }
 
@@ -250,22 +251,11 @@ void LocationInformationWidget::enableEdition()
 	ui.diveSiteMessage->setText(tr("You are editing a dive site"));
 }
 
-void LocationInformationWidget::on_diveSiteCoordinates_textChanged(const QString &text)
+void LocationInformationWidget::on_diveSiteCoordinates_editingFinished()
 {
 	if (!diveSite)
 		return;
-	location_t location;
+	Command::editDiveSiteLocation(diveSite, ui.diveSiteCoordinates->text());
-	bool ok_old = has_location(&diveSite->location);
-	bool ok = parseGpsText(text, location);
-	if (ok != ok_old || !same_location(&location, &diveSite->location)) {
-		if (ok) {
-			markChangedWidget(ui.diveSiteCoordinates);
-			enableLocationButtons(true);
-			filter_model.setCoordinates(location);
-		} else {
-			enableLocationButtons(false);
-		}
-	}
 }
 
 void LocationInformationWidget::on_diveSiteCountry_editingFinished()

desktop-widgets/locationinformation.h

@@ -30,7 +30,7 @@ public slots:
 	void resetState();
 	void resetPallete();
 	void on_diveSiteCountry_editingFinished();
-	void on_diveSiteCoordinates_textChanged(const QString& text);
+	void on_diveSiteCoordinates_editingFinished();
 	void on_diveSiteDescription_editingFinished();
 	void on_diveSiteName_editingFinished();
 	void on_diveSiteNotes_editingFinished();

desktop-widgets/tab-widgets/TabDiveSite.cpp

@@ -17,7 +17,7 @@ TabDiveSite::TabDiveSite(QWidget *parent) : TabBase(parent)
 	ui.diveSites->view()->setSortingEnabled(true);
 
 	// Show only the first few columns
-	for (int i = LocationInformationModel::COORDS; i < LocationInformationModel::COLUMNS; ++i)
+	for (int i = LocationInformationModel::LOCATION; i < LocationInformationModel::COLUMNS; ++i)
 		ui.diveSites->view()->setColumnHidden(i, true);
 
 	connect(ui.diveSites, &TableView::addButtonClicked, this, &TabDiveSite::add);

qt-models/divelocationmodel.cpp

@@ -92,7 +92,7 @@ QVariant LocationInformationModel::getDiveSiteData(const struct dive_site *ds, i
 		case DIVESITE: return QVariant::fromValue<dive_site *>((dive_site *)ds); // Not nice: casting away const
 		case NAME: return ds->name;
 		case NUM_DIVES: return ds->dives.nr;
-		case COORDS: return "TODO";
+		case LOCATION: return "TODO";
 		case DESCRIPTION: return ds->description;
 		case NOTES: return ds->name;
 		case TAXONOMY: return "TODO";

qt-models/divelocationmodel.h

@@ -17,7 +17,7 @@ class LocationInformationModel : public QAbstractTableModel {
 public:
 	// Common columns, roles and accessor function for all dive-site models.
 	// Thus, different views can connect to different models.
-	enum Columns { REMOVE, NAME, DESCRIPTION, NUM_DIVES, COORDS, NOTES, DIVESITE, TAXONOMY, COLUMNS};
+	enum Columns { REMOVE, NAME, DESCRIPTION, NUM_DIVES, LOCATION, NOTES, DIVESITE, TAXONOMY, COLUMNS};
 	enum Roles { DIVESITE_ROLE = Qt::UserRole + 1 };
 	static QVariant getDiveSiteData(const struct dive_site *ds, int column, int role);