source: trunk/src/gui/text/qfontmetrics.h@ 890

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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation ([email protected])
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** This file is part of the QtGui module of the Qt Toolkit.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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#ifndef QFONTMETRICS_H
#define QFONTMETRICS_H

#include <QtGui/qfont.h>
#include <QtCore/qsharedpointer.h>
#ifndef QT_INCLUDE_COMPAT
#include <QtCore/qrect.h>
#endif

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

#ifdef Q_WS_QWS
class QFontEngine;
#endif

class QTextCodec;
class QRect;


class Q_GUI_EXPORT QFontMetrics
{
public:
    QFontMetrics(const QFont &);
    QFontMetrics(const QFont &, QPaintDevice *pd);
    QFontMetrics(const QFontMetrics &);
    ~QFontMetrics();

    QFontMetrics &operator=(const QFontMetrics &);

    int ascent() const;
    int descent() const;
    int height() const;
    int leading() const;
    int lineSpacing() const;
    int minLeftBearing() const;
    int minRightBearing() const;
    int maxWidth() const;

    int xHeight() const;
    int averageCharWidth() const;

    bool inFont(QChar) const;

    int leftBearing(QChar) const;
    int rightBearing(QChar) const;
    int width(const QString &, int len = -1) const;
    int width(const QString &, int len, int flags) const;

    int width(QChar) const;
    int charWidth(const QString &str, int pos) const;

    QRect boundingRect(QChar) const;

    QRect boundingRect(const QString &text) const;
    QRect boundingRect(const QRect &r, int flags, const QString &text, int tabstops=0, int *tabarray=0) const;
    inline QRect boundingRect(int x, int y, int w, int h, int flags, const QString &text,
                              int tabstops=0, int *tabarray=0) const
        { return boundingRect(QRect(x, y, w, h), flags, text, tabstops, tabarray); }
    QSize size(int flags, const QString& str, int tabstops=0, int *tabarray=0) const;

    QRect tightBoundingRect(const QString &text) const;

    QString elidedText(const QString &text, Qt::TextElideMode mode, int width, int flags = 0) const;

    int underlinePos() const;
    int overlinePos() const;
    int strikeOutPos() const;
    int lineWidth() const;

    bool operator==(const QFontMetrics &other); // 5.0 - remove me
    bool operator==(const QFontMetrics &other) const;
    inline bool operator !=(const QFontMetrics &other) { return !operator==(other); } // 5.0 - remove me
    inline bool operator !=(const QFontMetrics &other) const { return !operator==(other); }

#ifdef QT3_SUPPORT
    inline QRect boundingRect(const QString &text, int len) const
        { return boundingRect(text.left(len)); }
    inline QRect boundingRect(int x, int y, int w, int h, int flags, const QString& str, int len,
                              int tabstops=0, int *tabarray=0) const
        { return boundingRect(QRect(x, y, w, h), flags, str.left(len), tabstops, tabarray); }
    inline QSize size(int flags, const QString& str, int len, int tabstops=0, int *tabarray=0) const
        { return size(flags, str.left(len), tabstops, tabarray); }
#endif
private:
#if defined(Q_WS_MAC)
    friend class QFontPrivate;
#endif
    friend class QFontMetricsF;
    friend class QStackTextEngine;

    QExplicitlySharedDataPointer<QFontPrivate> d;
};


class Q_GUI_EXPORT QFontMetricsF
{
public:
    QFontMetricsF(const QFont &);
    QFontMetricsF(const QFont &, QPaintDevice *pd);
    QFontMetricsF(const QFontMetrics &);
    QFontMetricsF(const QFontMetricsF &);
    ~QFontMetricsF();

    QFontMetricsF &operator=(const QFontMetricsF &);
    QFontMetricsF &operator=(const QFontMetrics &);

    qreal ascent() const;
    qreal descent() const;
    qreal height() const;
    qreal leading() const;
    qreal lineSpacing() const;
    qreal minLeftBearing() const;
    qreal minRightBearing() const;
    qreal maxWidth() const;

    qreal xHeight() const;
    qreal averageCharWidth() const;

    bool inFont(QChar) const;

    qreal leftBearing(QChar) const;
    qreal rightBearing(QChar) const;
    qreal width(const QString &string) const;

    qreal width(QChar) const;

    QRectF boundingRect(const QString &string) const;
    QRectF boundingRect(QChar) const;
    QRectF boundingRect(const QRectF &r, int flags, const QString& string, int tabstops=0, int *tabarray=0) const;
    QSizeF size(int flags, const QString& str, int tabstops=0, int *tabarray=0) const;

    QRectF tightBoundingRect(const QString &text) const;

    QString elidedText(const QString &text, Qt::TextElideMode mode, qreal width, int flags = 0) const;

    qreal underlinePos() const;
    qreal overlinePos() const;
    qreal strikeOutPos() const;
    qreal lineWidth() const;

    bool operator==(const QFontMetricsF &other); // 5.0 - remove me
    bool operator==(const QFontMetricsF &other) const;
    inline bool operator !=(const QFontMetricsF &other) { return !operator==(other); } // 5.0 - remove me
    inline bool operator !=(const QFontMetricsF &other) const { return !operator==(other); }

private:
    QExplicitlySharedDataPointer<QFontPrivate> d;
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QFONTMETRICS_H