qt图形开发之qwt6-0-1

#include <QApplication> #include <QMap> #include <QDesktopWidget> #include <QPainter> #include <QDomNode> #include "qwt_mml_document.h" // ******************************************************************* // Declarations // ******************************************************************* #define ROUND(a) (int)((a)+.5) static bool g_draw_frames = false; static const double g_mfrac_spacing = 0.1; static const double g_mroot_base_margin = 0.1; static const double g_script_size_multiplier = 0.7071; // sqrt(1/2) static const int g_min_font_point_size = 8; static const QChar g_radical_char = QChar( 0x1A, 0x22 ); static const unsigned g_oper_spec_rows = 9; struct QwtMml { enum NodeType { NoNode = 0, MiNode, MnNode, MfracNode, MrowNode, MsqrtNode, MrootNode, MsupNode, MsubNode, MsubsupNode, MoNode, MstyleNode, TextNode, MphantomNode, MfencedNode, MtableNode, MtrNode, MtdNode, MoverNode, MunderNode, MunderoverNode, MerrorNode, MtextNode, MpaddedNode, MspaceNode, MalignMarkNode, UnknownNode }; enum MathVariant { NormalMV = 0x0000, BoldMV = 0x0001, ItalicMV = 0x0002, DoubleStruckMV = 0x0004, ScriptMV = 0x0008, FrakturMV = 0x0010, SansSerifMV = 0x0020, MonospaceMV = 0x0040 }; enum FormType { PrefixForm, InfixForm, PostfixForm }; enum ColAlign { ColAlignLeft, ColAlignCenter, ColAlignRight }; enum RowAlign { RowAlignTop, RowAlignCenter, RowAlignBottom, RowAlignAxis, RowAlignBaseline }; enum FrameType { FrameNone, FrameSolid, FrameDashed }; struct FrameSpacing { FrameSpacing( int hor = 0, int ver = 0 ) : m_hor( hor ), m_ver( ver ) {} int m_hor, m_ver; }; }; struct QwtMmlOperSpec { enum StretchDir { NoStretch, HStretch, VStretch, HVStretch }; const char *name; QwtMml::FormType form; const char *attributes[g_oper_spec_rows]; StretchDir stretch_dir; }; struct QwtMmlNodeSpec { QwtMml::NodeType type; const char *tag; const char *type_str; int child_spec; const char *child_types; const char *attributes; enum ChildSpec { ChildAny = -1, // any number of children allowed ChildIgnore = -2, // do not build subexpression of children ImplicitMrow = -3 // if more than one child, build mrow }; }; struct QwtMmlEntitySpec { const char *name; const char *value; }; typedef QMap<QString, QString> QwtMmlAttributeMap; class QwtMmlNode; class QwtMmlDocument : public QwtMml { public: QwtMmlDocument(); ~QwtMmlDocument(); void clear(); bool setContent( QString text, QString *errorMsg = 0, int *errorLine = 0, int *errorColumn = 0 ); void paint( QPainter *p, const QPoint &pos ) const; void dump() const; QSize size() const; void layout(); QString fontName( QwtMathMLDocument::MmlFont type ) const; void setFontName( QwtMathMLDocument::MmlFont type, const QString &name ); int baseFontPointSize() const { return m_base_font_point_size; } void setBaseFontPointSize( int size ) { m_base_font_point_size = size; } QColor foregroundColor() const { return m_foreground_color; } void setForegroundColor( const QColor &color ) { m_foreground_color = color; } QColor backgroundColor() const { return m_background_color; } void setBackgroundColor( const QColor &color ) { m_background_color = color; } private: void _dump( const QwtMmlNode *node, QString &indent ) const; bool insertChild( QwtMmlNode *parent, QwtMmlNode *new_node, QString *errorMsg ); QwtMmlNode *domToMml( const QDomNode &dom_node, bool *ok, QString *errorMsg ); QwtMmlNode *createNode( NodeType type, const QwtMmlAttributeMap &mml_attr, const QString &mml_value, QString *errorMsg ); QwtMmlNode *createImplicitMrowNode( const QDomNode &dom_node, bool *ok, QString *errorMsg ); void insertOperator( QwtMmlNode *node, const QString &text ); QwtMmlNode *m_root_node; QString m_normal_font_name; QString m_fraktur_font_name; QString m_sans_serif_font_name; QString m_script_font_name; QString m_monospace_font_name; QString m_doublestruck_font_name; int m_base_font_point_size; QColor m_foreground_color; QColor m_background_color; }; class QwtMmlNode : public QwtMml { friend class QwtMmlDocument; public: QwtMmlNode( NodeType type, QwtMmlDocument *document, const QwtMmlAttributeMap &attribute_map ); virtual ~QwtMmlNode(); // Mml stuff NodeType nodeType() const { return m_node_type; } virtual QString toStr() const; void setRelOrigin( const QPoint &rel_origin ); QPoint relOrigin() const { return m_rel_origin; } void stretchTo( const QRect &rect ); bool isStretched() const { return m_stretched; } QPoint devicePoint( const QPoint &p ) const; QRect myRect() const { return m_my_rect; } QRect parentRect() const; virtual QRect deviceRect() const; void updateMyRect(); virtual void setMyRect( const QRect &rect ) { m_my_rect = rect; } virtual void stretch(); virtual void layout(); virtual void paint( QPainter *p ); int basePos() const; int overlinePos() const; int underlinePos() const; int em() const; int ex() const; QString explicitAttribute( const QString &name, const QString &def = QString::null ) const; QString inheritAttributeFromMrow( const QString &name, const QString &def = QString::null ) const; virtual QFont font() const; virtual QColor color() const; virtual QColor background() const; virtual int scriptlevel( const QwtMmlNode *child = 0 ) const; // Node stuff QwtMmlDocument *document() const { return m_document; } QwtMmlNode *parent() const { return m_parent; } QwtMmlNode *firstChild() const { return m_first_child; } QwtMmlNode *nextSibling() const { return m_next_sibling; } QwtMmlNode *previousSibling() const { return m_previous_sibling; } QwtMmlNode *lastSibling() const; QwtMmlNode *firstSibling() const; bool isLastSibling() const { return m_next_sibling == 0; } bool isFirstSibling() const { return m_previous_sibling == 0; } bool hasChildNodes() const { return m_first_child != 0; } protected: virtual void layoutSymbol(); virtual void paintSymbol( QPainter *p ) const; virtual QRect symbolRect() const { return QRect( 0, 0, 0, 0 ); } QwtMmlNode *parentWithExplicitAttribute( const QString &name, NodeType type = NoNode ); int interpretSpacing( const QString &value, bool *ok ) const; private: QwtMmlAttributeMap m_attribute_map; bool m_stretched; QRect m_my_rect, m_parent_rect; QPoint m_rel_origin; NodeType m_node_type; QwtMmlDocument *m_document; QwtMmlNode *m_parent, *m_first_child, *m_next_sibling, *m_previous_sibling; }; class QwtMmlTokenNode : public QwtMmlNode { public: QwtMmlTokenNode( NodeType type, QwtMmlDocument *document, const QwtMmlAttributeMap &attribute_map ) : QwtMmlNode( type, document, attribute_map ) {} QString text() const; }; class QwtMmlMphantomNode : public QwtMmlNode { public: QwtMmlMphantomNode( QwtMmlDocument *document, const QwtMmlAttributeMap &attribute_map ) : QwtMmlNode( MphantomNode, docu