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f11ac40593
Add a new UndoCommand for dive mode editing. This one is a bit special, as the mode is associated with a dive computer (DC), not a dive. Thus the edit command has an additional parameter, viz. the index of the DC. This does not fit properly to the EditBase class, as this class isn't aware of additional parameters and therefore this parameter is not sent via signals. At the moment this doesn't matter. In any case, the semantics of editing are weird and therefore let's do the simple thing (derive from EditBase) and let's see what the future brings. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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// Note: this header file is used by the undo-machinery and should not be included elsewhere.
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#ifndef COMMAND_EDIT_H
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#define COMMAND_EDIT_H
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#include "command_base.h"
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#include "core/subsurface-qt/DiveListNotifier.h"
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#include <QVector>
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// These are commands that edit individual fields of a set of dives.
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// The implementation is very OO-style. Out-of-fashion and certainly
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// not elegant, but in line with Qt's OO-based design.
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// The actual code is in a common base class "Command::EditBase". To
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// read and set the fields, the base class calls virtual functions of
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// the derived classes.
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//
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// To deal with different data types, the base class is implemented
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// as a template. The template parameter is the type to be read or
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// set. Thus, switch-cascades and union trickery can be avoided.
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// We put everything in a namespace, so that we can shorten names without polluting the global namespace
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namespace Command {
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template <typename T>
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class EditBase : public Base {
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T value; // Value to be set
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T old; // Previous value
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void undo() override;
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void redo() override;
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bool workToBeDone() override;
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// Dives to be edited. For historical reasons, the *last* entry was
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// the active dive when the user initialized the action. This dive
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// will be made the current dive on redo / undo.
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std::vector<dive *> dives;
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public:
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EditBase(const QVector<dive *> &dives, T newValue, T oldValue);
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protected:
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// Get and set functions to be overriden by sub-classes.
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virtual void set(struct dive *d, T) const = 0;
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virtual T data(struct dive *d) const = 0;
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virtual QString fieldName() const = 0; // Name of the field, used to create the undo menu-entry
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virtual DiveField fieldId() const = 0;
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};
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class EditNotes : public EditBase<QString> {
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public:
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using EditBase<QString>::EditBase; // Use constructor of base class.
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void set(struct dive *d, QString s) const override;
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QString data(struct dive *d) const override;
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QString fieldName() const override;
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DiveField fieldId() const override;
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};
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class EditMode : public EditBase<int> {
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int index;
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public:
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EditMode(const QVector<dive *> &dives, int indexIn, int newValue, int oldValue);
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void set(struct dive *d, int i) const override;
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int data(struct dive *d) const override;
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QString fieldName() const override;
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DiveField fieldId() const override;
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};
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} // namespace Command
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#endif
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