Undo: make editing of dive number undoable

When pressing F2 in the dive list, the number can be edited.
Make this action undoable by implementing a EditNumber command.

This command is differs from the other undo commands, as not the
currently selected dives are changed. This means that the EditCommand
needs an alternative constructor taking a single dive. This constructor
was implemented in the base class so that all edit commands can now
be called with a single dive.

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

desktop-widgets/command.cpp

@@ -163,6 +163,11 @@ int editMode(int index, int newValue, bool currentDiveOnly)
 	return execute_edit(new EditMode(index, newValue, currentDiveOnly));
 }
 
+int editNumber(int newValue, bool currentDiveOnly)
+{
+	return execute_edit(new EditNumber(newValue, currentDiveOnly));
+}
+
 int editSuit(const QString &newValue, bool currentDiveOnly)
 {
 	return execute_edit(new EditSuit(newValue, currentDiveOnly));

desktop-widgets/command.h

@@ -60,6 +60,7 @@ void purgeUnusedDiveSites();
 int editNotes(const QString &newValue, bool currentDiveOnly);
 int editSuit(const QString &newValue, bool currentDiveOnly);
 int editMode(int index, int newValue, bool currentDiveOnly);
+int editNumber(int newValue, bool currentDiveOnly);
 int editRating(int newValue, bool currentDiveOnly);
 int editVisibility(int newValue, bool currentDiveOnly);
 int editAirTemp(int newValue, bool currentDiveOnly);

desktop-widgets/command_edit.cpp

@@ -33,6 +33,13 @@ EditDivesBase::EditDivesBase(bool currentDiveOnly) :
 {
 }
 
+EditDivesBase::EditDivesBase(dive *d) :
+	dives({ d }),
+	selectedDives(getDiveSelection()),
+	current(current_dive)
+{
+}
+
 int EditDivesBase::numDives() const
 {
 	return dives.size();
@@ -45,6 +52,13 @@ EditBase<T>::EditBase(T newValue, bool currentDiveOnly) :
 {
 }
 
+template<typename T>
+EditBase<T>::EditBase(T newValue, dive *d) :
+	EditDivesBase(d),
+	value(std::move(newValue))
+{
+}
+
 // This is quite hackish: we can't use virtual functions in the constructor and
 // therefore can't initialize the list of dives [the values of the dives are
 // accessed by virtual functions]. Therefore, we (mis)use the fact that workToBeDone()
@@ -445,6 +459,28 @@ DiveField EditMode::fieldId() const
 	return DiveField::MODE;
 }
 
+// ***** Number *****
+void EditNumber::set(struct dive *d, int number) const
+{
+	d->number = number;
+}
+
+int EditNumber::data(struct dive *d) const
+{
+	return d->number;
+}
+
+QString EditNumber::fieldName() const
+{
+	return tr("number");
+}
+
+DiveField EditNumber::fieldId() const
+{
+	return DiveField::NR;
+}
+
+
 // ***** Tag based commands *****
 EditTagsBase::EditTagsBase(const QStringList &newListIn, bool currentDiveOnly) :
 	EditDivesBase(currentDiveOnly),

desktop-widgets/command_edit.h

@@ -29,6 +29,7 @@ namespace Command {
 class EditDivesBase : public Base {
 protected:
 	EditDivesBase(bool currentDiveOnly);
+	EditDivesBase(dive *d);
 	std::vector<dive *> dives; // Dives to be edited.
 
 	// On undo, we set the selection and current dive at the time of the operation.
@@ -50,6 +51,7 @@ protected:
 
 public:
 	EditBase(T newValue, bool currentDiveOnly);
+	EditBase(T newValue, dive *d);
 
 protected:
 	// Get and set functions to be overriden by sub-classes.
@@ -174,6 +176,15 @@ public:
 	DiveField fieldId() const override;
 };
 
+class EditNumber : public EditBase<int> {
+public:
+	using EditBase<int>::EditBase;	// Use constructor of base class.
+	void set(struct dive *d, int number) const override;
+	int data(struct dive *d) const override;
+	QString fieldName() const override;
+	DiveField fieldId() const override;
+};
+
 // Fields that work with tag-lists (tags, buddies, divemasters) work differently and therefore
 // have their own base class. In this case, it's not a template, as all these lists are base
 // on strings.

qt-models/divetripmodel.cpp

@@ -7,6 +7,7 @@
 #include "core/qthelper.h"
 #include "core/subsurface-string.h"
 #include "core/tag.h"
+#include "desktop-widgets/command.h"
 #include <QIcon>
 #include <QDebug>
 #include <memory>
@@ -412,8 +413,7 @@ bool DiveTripModelBase::setData(const QModelIndex &index, const QVariant &value,
 		if (dive->number == v)
 			return false;
 	}
-	d->number = v;
-	mark_divelist_changed(true);
+	Command::editNumber(v, d);
 	return true;
 }