kextendableitemdelegate.h

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/* This file is part of the KDE libraries
    Copyright (C) 2006,2007 Andreas Hartmetz (ahartmetz@gmail.com)
    Copyright (C) 2008 Urs Wolfer (uwolfer @ kde.org)

    This library 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 library 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 library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/


#ifndef KEXTENDABLEITEMDELEGATE_H
#define KEXTENDABLEITEMDELEGATE_H

#include <QtGui/QStyledItemDelegate>

#include <kdeui_export.h>

class QAbstractItemView;

class KDEUI_EXPORT KExtendableItemDelegate : public QStyledItemDelegate {
    Q_OBJECT

public:
    enum auxDataRoles {ShowExtensionIndicatorRole = Qt::UserRole + 200};

    KExtendableItemDelegate(QAbstractItemView *parent);
    virtual ~KExtendableItemDelegate();

    virtual QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;

    virtual void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;

    void extendItem(QWidget *extender, const QModelIndex &index);

    void contractItem(const QModelIndex &index);

    void contractAll();

    bool isExtended(const QModelIndex &index) const;

    virtual void updateExtenderGeometry(QWidget *extender, const QStyleOptionViewItem &option, const QModelIndex &index) const;

Q_SIGNALS:
    void extenderCreated(QWidget *extender, const QModelIndex &index);

    void extenderDestroyed(QWidget *extender, const QModelIndex &index);

protected:
    QRect extenderRect(QWidget *extender, const QStyleOptionViewItem &option, const QModelIndex &index) const;

    void setExtendPixmap(const QPixmap &pixmap);

    void setContractPixmap(const QPixmap &pixmap);

    QPixmap extendPixmap();

    QPixmap contractPixmap();


private:
    class Private;
    Private *const d;

    Q_PRIVATE_SLOT(d, void _k_extenderDestructionHandler(QObject *destroyed))
    Q_PRIVATE_SLOT(d, void _k_verticalScroll())
};
#endif // KEXTENDABLEITEMDELEGATE_H