themedelegate.h

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/******************************************************************************
 *
 *  Copyright 2008 Szymon Tomasz Stefanek <pragma@kvirc.net>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *******************************************************************************/

#ifndef __MESSAGELIST_CORE_THEMEDELEGATE_H__
#define __MESSAGELIST_CORE_THEMEDELEGATE_H__

#include <QStyledItemDelegate>
#include <QRect>
#include <QColor>

#include <messagelist/core/theme.h>
#include <messagelist/core/item.h>

class QAbstractItemView;

namespace MessageList
{

namespace Core
{

class Item;

class ThemeDelegate : public QStyledItemDelegate
{
    Q_OBJECT

public:
    explicit ThemeDelegate( QAbstractItemView * parent );
    ~ThemeDelegate();

private:
    const Theme * mTheme; 
    QAbstractItemView * mItemView;

    QColor mGroupHeaderBackgroundColor; // cache

    // hitTest results
    QModelIndex mHitIndex;
    Item * mHitItem;
    QRect mHitItemRect;
    const Theme::Column * mHitColumn;
    const Theme::Row * mHitRow;
    int mHitRowIndex;
    bool mHitRowIsMessageRow;
    QRect mHitRowRect;
    bool mHitContentItemRight;
    const Theme::ContentItem * mHitContentItem;
    QRect mHitContentItemRect;

public:
    const Theme * theme() const
    { return mTheme; }
    void setTheme( const Theme * theme );

    QSize sizeHintForItemTypeAndColumn( Item::Type type, int column, const Item *item = 0) const;

    bool hitTest( const QPoint &viewportPoint, bool exact = true );

    const QModelIndex & hitIndex() const
    { return mHitIndex; }

    Item * hitItem() const
    { return mHitItem; }

    QRect hitItemRect() const
    { return mHitItemRect; }

    const Theme::Column * hitColumn() const
    { return mHitColumn; }

    int hitColumnIndex() const
    { return mHitIndex.column(); }

    const Theme::Row * hitRow() const
    { return mHitRow; }

    int hitRowIndex() const
    { return mHitRowIndex; }

    QRect hitRowRect() const
    { return mHitRowRect; }

    bool hitRowIsMessageRow() const
    { return mHitRowIsMessageRow; }

    const Theme::ContentItem * hitContentItem() const
    { return mHitContentItem; }

    bool hitContentItemRight() const
    { return mHitContentItemRight; }

    QRect hitContentItemRect() const
    { return mHitContentItemRect; }

    static QFont itemFont( const Theme::ContentItem *ci, const Item *item );

    static QString itemFontKey( const Theme::ContentItem *ci, const Item *item );

protected:
    virtual Item * itemFromIndex( const QModelIndex &index ) const = 0;

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

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

private slots:
    void slotGeneralFontChanged();
};

} // namespace Core

} // namespace MessageList

#endif