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openvrml::vrml97_node::text_node Class Reference

Text node instances. More...

Inheritance diagram for openvrml::vrml97_node::text_node:

[legend]Collaboration diagram for openvrml::vrml97_node::text_node:

[legend]List of all members.

Public Member Functions
	text_node (const node_type &type, const scope_ptr &scope)
	Construct.
virtual	~text_node () throw ()
	Destroy.
virtual bool	modified () const
	Determine whether the node has been modified.
virtual viewer::object_t	insert_geometry (openvrml::viewer &viewer, rendering_context context)
	Insert this geometry into viewer's display list.
Private Types
typedef std::vector< std::vector< FcChar32 > >	ucs4_string_t
	A vector of FcChar32 vectors.
typedef std::map< FT_UInt, glyph_geometry >	glyph_geometry_map_t
	Maps FT_UInts to glyph_geometry.
Private Member Functions
virtual void	do_initialize (double timestamp) throw (std::bad_alloc)
	Initialize.
virtual void	do_shutdown (double timestamp) throw ()
	Shut down.
void	process_set_string (const field_value &value, double timestamp) throw (std::bad_cast, std::bad_alloc)
	set_string eventIn handler.
void	process_set_fontStyle (const field_value &value, double timestamp) throw (std::bad_cast, std::bad_alloc)
	set_fontStyle eventIn handler.
void	process_set_length (const field_value &value, double timestamp) throw (std::bad_cast, std::bad_alloc)
	set_length eventIn handler.
void	process_set_maxExtent (const field_value &value, double timestamp) throw (std::bad_cast)
	set_maxExtent eventIn handler.
void	update_ucs4 () throw (std::bad_alloc)
	Called when string changes to update the UCS-4 text.
void	update_face () throw (std::bad_alloc)
	Called when fontStyle changes to update the font face.
void	update_geometry () throw (std::bad_alloc)
	Called to update text_geometry.
Private Attributes
mfstring	string
	string exposedField.
sfnode	fontStyle
	fontStyle exposedField.
mffloat	length
	length exposedField.
sffloat	maxExtent
	maxExtent exposedField.
ucs4_string_t	ucs4_string
	UCS-4 equivalent of the (UTF-8) data in string.
FT_Face	face
	Handle to the font face.
glyph_geometry_map_t	glyph_geometry_map
	Map of glyph indices to glyph_geometry.
text_geometry	text_geometry_
	The text geometry.
Friends
class	text_class
	Class object for Text instances.

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Detailed Description

Text node instances.

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Member Typedef Documentation

openvrml::vrml97_node::text_node::glyph_geometry_map_t [private]

Maps FT_UInts to glyph_geometry. See also: http://freetype.org/freetype2/docs/reference/ft2-basic_types.html#FT_UInt

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Constructor & Destructor Documentation

openvrml::vrml97_node::text_node::text_node (  const node_type &  type, const scope_ptr &  scope )

Construct. Parameters: type  the node_type associated with the instance. scope  the scope that the new node will belong to.

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Member Function Documentation

void openvrml::vrml97_node::text_node::do_initialize (  double  timestamp  )  throw (std::bad_alloc) [private, virtual]

Initialize. Parameters: timestamp  the current time. Exceptions: std::bad_alloc  if memory allocation fails. Reimplemented from openvrml::node.

void openvrml::vrml97_node::text_node::do_shutdown (  double  timestamp  )  throw () [private, virtual]

Shut down. Parameters: timestamp  the current time. Reimplemented from openvrml::node.

viewer::object_t openvrml::vrml97_node::text_node::insert_geometry (  openvrml::viewer &  viewer, rendering_context  context )  [virtual]

Insert this geometry into viewer's display list. Parameters: viewer  a Viewer. context  the rendering context. Implements openvrml::geometry_node.

bool openvrml::vrml97_node::text_node::modified (   )  const [virtual]

Determine whether the node has been modified. Returns: true if the node or one of its children has been modified, false otherwise. Reimplemented from openvrml::node.

void openvrml::vrml97_node::text_node::process_set_fontStyle (  const field_value &  value, double  timestamp )  throw (std::bad_cast, std::bad_alloc) [private]

set_fontStyle eventIn handler. Parameters: value  an sfnode value. timestamp  the current time. Exceptions: std::bad_cast  if value is not an sfnode. std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::process_set_length (  const field_value &  value, double  timestamp )  throw (std::bad_cast, std::bad_alloc) [private]

set_length eventIn handler. Parameters: value  an mffloat value. timestamp  the current time. Exceptions: std::bad_cast  if value is not an mffloat. std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::process_set_maxExtent (  const field_value &  value, double  timestamp )  throw (std::bad_cast) [private]

set_maxExtent eventIn handler. Parameters: value  an sffloat value. timestamp  the current time. Exceptions: std::bad_cast  if value is not an sffloat. std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::process_set_string (  const field_value &  value, double  timestamp )  throw (std::bad_cast, std::bad_alloc) [private]

set_string eventIn handler. Parameters: value  an mfstring value. timestamp  the current time. Exceptions: std::bad_cast  if value is not an mfstring. std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::update_face (   )  throw (std::bad_alloc) [private]

Called when fontStyle changes to update the font face. Exceptions: std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::update_geometry (   )  throw (std::bad_alloc) [private]

Called to update text_geometry. Exceptions: std::bad_alloc  if memory allocation fails.

void openvrml::vrml97_node::text_node::update_ucs4 (   )  throw (std::bad_alloc) [private]

Called when string changes to update the UCS-4 text. Exceptions: std::bad_alloc  if memory allocation fails.

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Member Data Documentation

FT_Face openvrml::vrml97_node::text_node::face [private]

Handle to the font face. See also: http://freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_Face

text_node::glyph_geometry_map_t openvrml::vrml97_node::text_node::glyph_geometry_map [private]

Map of glyph indices to glyph_geometry. glyph_geometry instances are created as needed as new glyphs are encountered. Once they are created, they are cached in the glyph_geometry_map for rapid retrieval the next time the glyph is encountered.