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// SPDX-License-Identifier: GPL-2.0
// Note: this header file is used by the undo-machinery and should not be included elsewhere.
#ifndef COMMAND_EDIT_H
#define COMMAND_EDIT_H
#include "command_base.h"
#include "core/subsurface-qt/DiveListNotifier.h"
#include <QVector>
// These are commands that edit individual fields of a set of dives.
// The implementation is very OO-style. Out-of-fashion and certainly
// not elegant, but in line with Qt's OO-based design.
// The actual code is in a common base class "Command::EditBase". To
// read and set the fields, the base class calls virtual functions of
// the derived classes.
//
// To deal with different data types, the base class is implemented
// as a template. The template parameter is the type to be read or
// set. Thus, switch-cascades and union trickery can be avoided.
// We put everything in a namespace, so that we can shorten names without polluting the global namespace
namespace Command {
template <typename T>
class EditBase : public Base {
T value; // Value to be set
T old; // Previous value
void undo() override;
void redo() override;
bool workToBeDone() override;
// Dives to be edited. For historical reasons, the *last* entry was
// the active dive when the user initialized the action. This dive
// will be made the current dive on redo / undo.
std::vector<dive *> dives;
public:
EditBase(const QVector<dive *> &dives, T newValue, T oldValue);
protected:
// Get and set functions to be overriden by sub-classes.
virtual void set(struct dive *d, T) const = 0;
virtual T data(struct dive *d) const = 0;
virtual QString fieldName() const = 0; // Name of the field, used to create the undo menu-entry
virtual DiveField fieldId() const = 0;
};
class EditNotes : public EditBase<QString> {
public:
using EditBase<QString>::EditBase; // Use constructor of base class.
void set(struct dive *d, QString s) const override;
QString data(struct dive *d) const override;
QString fieldName() const override;
DiveField fieldId() const override;
};
class EditMode : public EditBase<int> {
int index;
public:
EditMode(const QVector<dive *> &dives, int indexIn, int newValue, int oldValue);
void set(struct dive *d, int i) const override;
int data(struct dive *d) const override;
QString fieldName() const override;
DiveField fieldId() const override;
};
} // namespace Command
#endif
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