koffice/kexi/widget/tableview/kexibooltableedit.h

/* This file is part of the KDE project
   Copyright (C) 2004 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 KEXIBOOLTABLEEDIT_H
#define KEXIBOOLTABLEEDIT_H

#include <tqvariant.h>

#include "kexitableedit.h"
#include "kexicelleditorfactory.h"

/*! @short Cell editor for boolean type.
*/
class KexiBoolTableEdit : public KexiTableEdit
{
	Q_OBJECT
  TQ_OBJECT

	public:
		KexiBoolTableEdit(KexiTableViewColumn &column, TQWidget *parent=0);

		virtual ~KexiBoolTableEdit();

		//! \return true if editor's value is null (not empty)
		virtual bool valueIsNull();

		//! \return true if editor's value is empty (not null). 
		//! Only few field types can accept "EMPTY" property 
		//! (check this with KexiDB::Field::hasEmptyProperty()), 
		virtual bool valueIsEmpty();

		virtual TQVariant value();

		virtual bool cursorAtStart();
		virtual bool cursorAtEnd();

		virtual void clear();

		virtual void setupContents( TQPainter *p, bool focused, const TQVariant& val, 
			TQString &txt, int &align, int &x, int &y_offset, int &w, int &h );

		virtual void clickedOnContents();

		/*! Handles action having standard name \a actionName. 
		 Action could be: "edit_cut", "edit_paste", etc. */
		virtual void handleAction(const TQString& actionName);

		/*! Handles copy action for value. Copies empty string for null, "1" for true, "0" for false.
		 \a visibleValue is unused here. Reimplemented after KexiTableEdit. */
		virtual void handleCopyAction(const TQVariant& value, const TQVariant& visibleValue);

		/*! \return width of \a value. Reimplemented  after KexiTableEdit. */
		virtual int widthForValue( TQVariant &val, const TQFontMetrics &fm );

	protected slots:

	protected:
		//! initializes this editor with \a add value
		virtual void setValueInternal(const TQVariant& add, bool removeOld);

		void showHintButton();

		//! We've no editor widget that would store current value, so we do this here
		TQVariant m_currentValue;

	signals:
		void hintClicked();
};

KEXI_DECLARE_CELLEDITOR_FACTORY_ITEM(KexiBoolEditorFactoryItem)

#endif