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****************************************************************************/

#ifndef UIQUICKUNDOCOMMAND_H
#define UIQUICKUNDOCOMMAND_H

#include <UiHelpers/UiUndoStack>
#include <QVariant>

QT_USE_NAMESPACE_UIHELPERS;

class UiQuickBaseUndoCommand : public QObject
{
    Q_OBJECT

public:
    UiQuickBaseUndoCommand(QObject *parent = 0);
    ~UiQuickBaseUndoCommand();
};

// ------- //

class UiQuickUndoCommand : public UiQuickBaseUndoCommand
{
    Q_OBJECT

public:
    UiQuickUndoCommand(QObject *parent = 0);
    ~UiQuickUndoCommand();

signals:
    void undo(QObject *target);
    void redo(QObject *target);
    void commandDestroyed(QObject *target);
};

class UndoCommand : public UiUndoCommand
{
public:
    UndoCommand(QObject* target, UiQuickUndoCommand *m_qmlObject);
    ~UndoCommand();

    void undo();
    void redo();

private:
    QObject *m_target;
    UiQuickUndoCommand *m_qmlObject;
};

// -----------------//

class UiQuickUndoPropertyCommand : public UiQuickBaseUndoCommand
{
    Q_OBJECT

    Q_PROPERTY(QVariantList properties READ properties WRITE setProperties NOTIFY propertiesChanged)

public:
    UiQuickUndoPropertyCommand(QObject *parent = 0);
    ~UiQuickUndoPropertyCommand();

    QVariantList properties() const;
    void setProperties(const QVariantList& prop);

signals:
    void propertiesChanged();

private:
    QVariantList m_properties;
};

typedef QPair<QByteArray, QVariant> PropertyState;
typedef QList<PropertyState> TargetState;

class UndoPropertyCommand : public UiUndoCommand
{

public:
    UndoPropertyCommand(QObject*, UiQuickUndoPropertyCommand*);
    ~UndoPropertyCommand();

    void undo();
    void redo();

private:
    void saveState(TargetState& state);
    void applyState(TargetState& state);

    TargetState m_undoState;
    TargetState m_redoState;
    QObject *m_target;
    UiQuickUndoPropertyCommand *m_qmlObject;
};

#endif