kexidbcheckbox.h

/* This file is part of the KDE project
   Copyright (C) 2005 Cedric Pasteur <cedric.pasteur@free.fr>
   Copyright (C) 2004-2006 Jaroslaw Staniek <js@iidea.pl>
 
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#ifndef KexiDBCheckBox_H
#define KexiDBCheckBox_H
 
#include "kexiformdataiteminterface.h"
#include <tqcheckbox.h>

class KEXIFORMUTILS_EXPORT KexiDBCheckBox : public TQCheckBox, public KexiFormDataItemInterface
{
    TQ_OBJECT
  
    TQ_PROPERTY(TQString dataSource READ dataSource WRITE setDataSource DESIGNABLE true)
    TQ_PROPERTY(TQCString dataSourceMimeType READ dataSourceMimeType WRITE setDataSourceMimeType DESIGNABLE true)
    TQ_OVERRIDE( Tristate tristate READ isTristate WRITE setTristate )
    TQ_ENUMS( Tristate )
 
    public:
        KexiDBCheckBox(const TQString &text, TQWidget *parent, const char *name=0);
        virtual ~KexiDBCheckBox();
 
        inline TQString dataSource() const { return KexiFormDataItemInterface::dataSource(); }
        inline TQCString dataSourceMimeType() const { return KexiFormDataItemInterface::dataSourceMimeType(); }
        virtual TQVariant value();
        virtual void setInvalidState( const TQString& displayText );

        virtual bool valueIsNull();

        virtual bool valueIsEmpty();

        virtual bool isReadOnly() const;

        virtual TQWidget* widget();
 
        virtual bool cursorAtStart();
        virtual bool cursorAtEnd();
        virtual void clear();
 
        virtual void setEnabled(bool enabled);
 
        enum Tristate { TristateDefault, TristateOn, TristateOff };
 
        void setTristate(Tristate tristate);
        Tristate isTristate() const;

        virtual void setDisplayDefaultValue(TQWidget* widget, bool displayDefaultValue);
 
    public slots:
        void setDataSource(const TQString &ds);
        inline void setDataSourceMimeType(const TQCString &ds) { KexiFormDataItemInterface::setDataSourceMimeType(ds); }
        void slotStateChanged(int state);

        virtual void setReadOnly( bool readOnly );
 
    protected:
        virtual void setValueInternal(const TQVariant& add, bool removeOld);

        bool isTristateInternal() const;

        void updateTristate();
 
    private:
        bool m_invalidState : 1;
        bool m_tristateChanged : 1; 
        Tristate m_tristate; 
};
 
#endif