Main Page   Namespace List   Class Hierarchy   Compound List   File List   Namespace Members   Compound Members   Related Pages  

pdf::page::CXObjInst Class Reference

an instance of an xobject More...

#include <XObjInst.hh>

Collaboration diagram for pdf::page::CXObjInst:

Collaboration graph
[legend]
List of all members.

Public Methods

Private Attributes

Detailed Description

an instance of an xobject

this class represents an instance of an xobject inside a page. it contains information of drawing an xobject on a page. a page can contain multiple instance of the same xobject, such that the same xobject will be drawn more than once.

the CXObjInst class contains a pointer to an xobject as well as a transformation matrix. before the xobject is drawn the transformation matrix will be applied. you should use the transformation matrix to specify position and size of the xobject's appearance.

Constructor & Destructor Documentation

pdf::page::CXObjInst::CXObjInst (  const graph::CXObject *    xobj,
double    x,
double    y,
double    width,
double    height
) 
 

this constructor will calculate a transformation from its parameters.

Parameters:
xobj  a pointer to the xobject to be drawn. must not be zero.
x  x coordinate of the xobject in the page, in user space units (1/72 inches by default).
y  y coordinate. same unit as x.
width  width of the xobject. same unit as x and y.
height  height of the xobject. same unit as width. 

00045     : m_transform( width, 0, 0, height, x, y ), m_xobj( xobj )
00046 {
00047     assert( xobj != 0 ) ;
00048 }

pdf::page::CXObjInst::CXObjInst (  const graph::CXObject *    xobj,
const util::CMatrix2D &    transform
) 
 

this constructor will copy the parameters to the members.

Parameters:
xobj  a pointer to the xobject to be drawn. must not be zero.
transform  a 2D matrix specifying the transformation of the xobject in the page. 

00057     : m_transform( transform ), m_xobj( xobj )
00058 {
00059     assert( xobj != 0 ) ;
00060 }

pdf::page::CXObjInst::~CXObjInst (    ) 
 

destructor does nothing. 

00065 {
00066 }

Member Function Documentation

std::ostream & pdf::page::CXObjInst::Write (  std::ostream &    os )  const
 

write the code to draw an xobject to the output stream. note that this function will not print the content of the xobject to the output stream.

Parameters:
os  the output stream
Returns:
the parameter os 

00075 {
00076     assert( m_xobj != 0 ) ;
00077 
00078     return os << "q\n" << m_transform << " cm\n" << m_xobj->Name( )
00079               << " Do\nQ\n" ;
00080 }

const graph::CXObject * pdf::page::CXObjInst::XObj (    )  const
 

returns the underlying xobject pointer. 

00085 {
00086     assert( m_xobj != 0 ) ;
00087     
00088     return m_xobj ;
00089 }

Member Data Documentation

util::CMatrix2D pdf::page::CXObjInst::m_transform [private]
 

transformation matrix

const graph::CXObject* pdf::page::CXObjInst::m_xobj [private]
 

the underlying xobject

The documentation for this class was generated from the following files:
Generated on Sun Feb 2 09:17:32 2003 for libpdf++ by doxygen1.2.16