monitorchangerecorder.h

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#pragma once
 
/*+
________________________________________________________________________
 
 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Bert
 Date:          June 2016
________________________________________________________________________
 
-*/
 
#include "namedmonitoredobject.h"
#include "uistring.h"
#include "objectset.h"
 
 
mExpClass(Basic) ChangeRecorder : public NamedMonitoredObject
{
public:
 
                        ~ChangeRecorder();
    mDeclAbstractMonitorableAssignment(ChangeRecorder);
    bool                isEmpty() const;
    void                setEmpty();
 
    enum Action         { Undo, Redo };
 
    mExpClass(Basic) Record
    { mODTextTranslationClass(ChangeRecorder::Record)
    public:
        typedef ChangeRecorder::Action  Action;
        virtual                 ~Record()                               {}
        virtual Record*         clone() const                           = 0;
        virtual bool            isValid() const                         = 0;
        virtual uiString        name() const                            = 0;
        virtual uiString        actionText(Action) const;
        virtual bool            apply(MonitoredObject&,Action) const    = 0;
    };
 
 
    bool                canApply(Action) const;
    uiString            usrText(Action) const;
    bool                apply(Action);
 
protected:
 
    typedef ObjectSet<Record>::idx_type    idx_type;
 
                        ChangeRecorder(MonitoredObject&,const char* nm);
                        ChangeRecorder(const MonitoredObject&,const char*);
 
    MonitoredObject*    obj_;
    ObjectSet<Record>   recs_;
    idx_type            idx4redo_;
    bool                applying_;
 
                        // fns with no locking:
    void                clear();
    void                objDel(CallBacker*);
    void                objChg(CallBacker*);
    idx_type            gtIdx(Action) const;
    void                addRec(Record*);
 
    virtual void        handleObjChange(const ChangeData&)      = 0;
 
private:
 
    void                init();
 
};