8d1e4557a9
Add a class to handle all undo/redo events. Whenever a user action affects a dive, an undo command will be created. A list of these commands will be stored in the UndoBuffer, to allow for moving forwards/backwards in the list. Signed-off-by: Grace Karanja <gracie.karanja89@gmail.com> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
38 lines
648 B
C++
38 lines
648 B
C++
#ifndef UNDOBUFFER_H
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#define UNDOBUFFER_H
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#include <QObject>
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#include "dive.h"
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class UndoCommand {
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private:
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dive* stateBefore;
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dive* stateAfter;
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QString name;
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public:
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explicit UndoCommand(QString commandName, dive* affectedDive);
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void setStateAfter(dive* affectedDive);
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void undo();
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void redo();
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};
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class UndoBuffer : public QObject
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{
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Q_OBJECT
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public:
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explicit UndoBuffer(QObject *parent = 0);
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~UndoBuffer();
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bool canUndo();
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bool canRedo();
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private:
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int curIdx;
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public slots:
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void redo();
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void undo();
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void recordbefore(QString commandName, dive *affectedDive);
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void recordAfter(dive *affectedDive);
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};
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#endif // UNDOBUFFER_H
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