creativity::data::graph::Target Class Reference

Abstract base class for graph destinations. More...

#include <creativity/data/graph/Target.hpp>

Public Member Functions
virtual Cairo::RefPtr< Cairo::Surface >	surface ()=0
	Creates and returns the Cairo::Surface on which to draw the graph.
virtual Cairo::Matrix	unitTransformation () const
	Returns a Cairo::Matrix that translates [0,1]x[0,1] coordinates into the drawable image surface. More...
virtual const double &	width () const =0
	Returns the surface width, in device units.
virtual const double &	height () const =0
	Returns the surface height, in device units.
virtual void	newPage ()=0
	Called to indicate that the current page/surface is finished and should be saved and a new, blank surface/page created. More...

Detailed Description

Abstract base class for graph destinations.

See also

PDF

PNG

SVG

Member Function Documentation

newPage()

virtual void creativity::data::graph::Target::newPage ( )

pure virtual

Called to indicate that the current page/surface is finished and should be saved and a new, blank surface/page created.

Typically this means the surface is written as a new page (PDF) or file (PNG).

Implemented in creativity::data::graph::PDF.

unitTransformation()

virtual Cairo::Matrix creativity::data::graph::Target::unitTransformation ( ) const

inlinevirtual

Returns a Cairo::Matrix that translates [0,1]x[0,1] coordinates into the drawable image surface.

Coordinate (0,0) should map to the top-left corner, (1,1) should map to the bottom-right corner.

The default simply returns Cairo::scaling_matrix(width(), height()), but subclasses could override.

Inheritance diagram for creativity::data::graph::Target:

Collaboration diagram for creativity::data::graph::Target:

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The documentation for this class was generated from the following file:

• creativity/data/graph/Target.hpp