qwt_text.h

/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/
 
#ifndef QWT_TEXT_H
#define QWT_TEXT_H
 
#include "qwt_global.h"
#include <qmetatype.h>
 
class QFont;
class QString;
class QColor;
class QPen;
class QBrush;
class QSizeF;
class QRectF;
class QPainter;
class QwtTextEngine;
 
class QWT_EXPORT QwtText
{
  public:
 
    enum TextFormat
    {
        AutoText = 0,
 
        PlainText,
 
        RichText,
 
        MathMLText,
 
        TeXText,
 
        OtherFormat = 100
    };
 
    enum PaintAttribute
    {
        PaintUsingTextFont = 0x01,
 
        PaintUsingTextColor = 0x02,
 
        PaintBackground = 0x04
    };
 
    Q_DECLARE_FLAGS( PaintAttributes, PaintAttribute )
 
    
    enum LayoutAttribute
    {
        MinimumLayout = 0x01
    };
 
    Q_DECLARE_FLAGS( LayoutAttributes, LayoutAttribute )
 
    QwtText();
    QwtText( const QString&, TextFormat textFormat = AutoText );
    QwtText( const QwtText& );
 
    ~QwtText();
 
    QwtText& operator=( const QwtText& );
 
    bool operator==( const QwtText& ) const;
    bool operator!=( const QwtText& ) const;
 
    void setText( const QString&,
        QwtText::TextFormat textFormat = AutoText );
    QString text() const;
 
    bool isNull() const;
    bool isEmpty() const;
 
    void setFont( const QFont& );
    QFont font() const;
 
    QFont usedFont( const QFont& ) const;
 
    void setRenderFlags( int );
    int renderFlags() const;
 
    void setColor( const QColor& );
    QColor color() const;
 
    QColor usedColor( const QColor& ) const;
 
    void setBorderRadius( double );
    double borderRadius() const;
 
    void setBorderPen( const QPen& );
    QPen borderPen() const;
 
    void setBackgroundBrush( const QBrush& );
    QBrush backgroundBrush() const;
 
    void setPaintAttribute( PaintAttribute, bool on = true );
    bool testPaintAttribute( PaintAttribute ) const;
 
    void setLayoutAttribute( LayoutAttribute, bool on = true );
    bool testLayoutAttribute( LayoutAttribute ) const;
 
    double heightForWidth( double width ) const;
    double heightForWidth( double width, const QFont& ) const;
 
    QSizeF textSize() const;
    QSizeF textSize( const QFont& ) const;
 
    void draw( QPainter* painter, const QRectF& rect ) const;
 
    static const QwtTextEngine* textEngine(
        const QString& text, QwtText::TextFormat = AutoText );
 
    static const QwtTextEngine* textEngine( QwtText::TextFormat );
    static void setTextEngine( QwtText::TextFormat, QwtTextEngine* );
 
  private:
    class PrivateData;
    PrivateData* m_data;
 
    class LayoutCache;
    LayoutCache* m_layoutCache;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtText::PaintAttributes )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtText::LayoutAttributes )
 
Q_DECLARE_METATYPE( QwtText )
 
#endif