qt-everywhere-src-5.15.1/qtdeclarative/src/quick/util/qquickfontmetrics_p.h

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#ifndef QQUICKFONTMETRICS_H
#define QQUICKFONTMETRICS_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <qqml.h>

#include <QtGui/QFontMetricsF>
#include <QtCore/QObject>

QT_BEGIN_NAMESPACE

class QFont;

class Q_AUTOTEST_EXPORT QQuickFontMetrics : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QFont font READ font WRITE setFont NOTIFY fontChanged)
    Q_PROPERTY(qreal ascent READ ascent NOTIFY fontChanged)
    Q_PROPERTY(qreal descent READ descent NOTIFY fontChanged)
    Q_PROPERTY(qreal height READ height NOTIFY fontChanged)
    Q_PROPERTY(qreal leading READ leading NOTIFY fontChanged)
    Q_PROPERTY(qreal lineSpacing READ lineSpacing NOTIFY fontChanged)
    Q_PROPERTY(qreal minimumLeftBearing READ minimumLeftBearing NOTIFY fontChanged)
    Q_PROPERTY(qreal minimumRightBearing READ minimumRightBearing NOTIFY fontChanged)
    Q_PROPERTY(qreal maximumCharacterWidth READ maximumCharacterWidth NOTIFY fontChanged)
    Q_PROPERTY(qreal xHeight READ xHeight NOTIFY fontChanged)
    Q_PROPERTY(qreal averageCharacterWidth READ averageCharacterWidth NOTIFY fontChanged)
    Q_PROPERTY(qreal underlinePosition READ underlinePosition NOTIFY fontChanged)
    Q_PROPERTY(qreal overlinePosition READ overlinePosition NOTIFY fontChanged)
    Q_PROPERTY(qreal strikeOutPosition READ strikeOutPosition NOTIFY fontChanged)
    Q_PROPERTY(qreal lineWidth READ lineWidth NOTIFY fontChanged)
    QML_NAMED_ELEMENT(FontMetrics)
    QML_ADDED_IN_MINOR_VERSION(4)
public:
    explicit QQuickFontMetrics(QObject *parent = nullptr);
    ~QQuickFontMetrics();

    QFont font() const;
    void setFont(const QFont &font);

    qreal ascent() const;
    qreal descent() const;
    qreal height() const;
    qreal leading() const;
    qreal lineSpacing() const;
    qreal minimumLeftBearing() const;
    qreal minimumRightBearing() const;
    qreal maximumCharacterWidth() const;

    qreal xHeight() const;
    qreal averageCharacterWidth() const;

    qreal underlinePosition() const;
    qreal overlinePosition() const;
    qreal strikeOutPosition() const;
    qreal lineWidth() const;

    Q_INVOKABLE qreal advanceWidth(const QString &text) const;
    Q_INVOKABLE QRectF boundingRect(const QString &text) const;
    Q_INVOKABLE QRectF tightBoundingRect(const QString &text) const;
    Q_INVOKABLE QString elidedText(const QString &text, Qt::TextElideMode mode, qreal width, int flags = 0) const;

Q_SIGNALS:
    void fontChanged(const QFont &font);

private:
    QFont m_font;
    QFontMetricsF m_metrics;
};

QT_END_NAMESPACE

QML_DECLARE_TYPE(QQuickFontMetrics)

#endif // QQUICKFONTMETRICS_H