File: kfontutils.h

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/*********************************************************************************
 *                                                                               *
 *   Copyright (C) 2005, 2009 by Albert Astals Cid <aacid@kde.org>               *
 *                                                                               *
 * This library is free software; you can redistribute it and/or                 *
 * modify it under the terms of the GNU Lesser General Public                    *
 * License as published by the Free Software Foundation; either                  *
 * version 2.1 of the License, or (at your option) version 3, or any             *
 * later version accepted by the membership of KDE e.V. (or its                  *
 * successor approved by the membership of KDE e.V.), which shall                *
 * act as a proxy defined in Section 6 of version 3 of the license.              *
 *                                                                               *
 * 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             *
 * Lesser General Public License for more details.                               *
 *                                                                               *
 * You should have received a copy of the GNU Lesser General Public              *
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                               *
 *********************************************************************************/

#ifndef KFONTUTILS_H
#define KFONTUTILS_H

#include <QGraphicsTextItem>


class QPainter;
class QSizeF;
class QString;

namespace KFontUtils
{
    /** Modifiers for the adaptFontSize function */
    enum AdaptFontSizeOption {
        NoFlags = 0x01 /** No modifier */,
        DoNotAllowWordWrap = 0x02  /** Do not use word wrapping */
    };
    Q_DECLARE_FLAGS(AdaptFontSizeOptions, AdaptFontSizeOption)

    /** Helper function that calculates the biggest font size (in points) used
        drawing a centered text using word wrapping.
        @param text The QGraphicsTextItem you want to draw
        @param width The available width for drawing
        @param height The available height for drawing
        @param maxFontSize The maximum font size (in points) to consider
        @param minFontSize The minimum font size (in points) to consider
        @param flags The modifiers for how the text is painted
        @param precision The maximum unused space (in pixels) in any axys
        @return The calculated biggest font size (in points) that draws the text
                in the given dimensions. Cannot return smaller than minFontSize neither
                bigger than maxFontSize. Can return -1 on error.
        @since KDE 4.7
    */
    qreal adaptFontSize(QGraphicsTextItem* text,
                                     qreal width,
                                     qreal height,
                                     qreal maxFontSize = 28.0,
                                     qreal minFontSize = 1.0,
                                     qreal precision = 1.0);

    /** Convenience function for adaptFontSize that accepts a QSizeF instead two qreals
        @since KDE 4.7
    */
    qreal adaptFontSize(QGraphicsTextItem* text,
                                     const QSizeF &availableSize,
                                     qreal maxFontSize = 28.0,
                                     qreal minFontSize = 1.0,
                                     qreal precision = 1.0);
}

Q_DECLARE_OPERATORS_FOR_FLAGS(KFontUtils::AdaptFontSizeOptions)

#endif