Base class for legend definition. More...

#include <legend.hpp>

Inheritance diagram for Legend:

Public Member Functions
	Legend ()
	Default constructor for legend. More...

virtual	~Legend ()
	Virtual destructor. More...

virtual void	plot (cairo_t *cairo, double x, double y)=0
	Plot legend at (x,y). More...

virtual void	get_size (cairo_t *cairo, double &width, double &height)=0
	Get size of legend. More...

Detailed Description

Base class for legend definition.

Legend is an object that contains a key to the plot styles used in graphs. The key contains a sample of the plot style used and a corresponding text label.

The Colormap legend is a special case because in addition to the plot style, the plot z-range is shown in the legend.

The size of legend can be queried and the location can be set.

Constructor & Destructor Documentation

◆ Legend()

Legend::Legend ( )

inline

Default constructor for legend.

◆ ~Legend()

virtual Legend::~Legend ( )

inlinevirtual

Virtual destructor.

Member Function Documentation

◆ get_size()

virtual void Legend::get_size	(	cairo_t *	cairo,
		double &	width,
		double &	height
	)

pure virtual

Get size of legend.

Implemented in ColormapLegend, and MultiEntryLegend.

◆ plot()

virtual void Legend::plot	(	cairo_t *	cairo,
		double	x,
		double	y
	)

pure virtual

Plot legend at (x,y).

The point (x,y) is the lower left point of the entry.