Factory to create instances that manage data point projection. More...

#include <ilviews/charts/display.h>

Inheritance diagram for IlvChartDisplayerPointsFactory:

Public Member Functions
virtual IlvChartDisplayerPointsFactory *	copy () const =0
	Virtual copy constructor. More...

virtual IlvChartDisplayerPoints *	create (const IlvChartGraphic chart, const IlvSingleChartDisplayer disp)=0
	Creates an instance that handles data point projection. More...

virtual void	release (const IlvSingleChartDisplayer disp, IlvChartDisplayerPoints dispPts)
	Free the created instance that handles data point projection. More...

Protected Member Functions
	IlvChartDisplayerPointsFactory ()
	Constructor. More...

Detailed Description

Factory to create instances that manage data point projection.

Library: ilvcharts

This factory class is used to create the instances that will handle data point projection and rendering for chart displayers. The IlvChartDisplayerPointsFactory::create() method must be overloaded to return an instance of a subclass of IlvChartDisplayerPoints.

See also: IlvSingleChartDisplayer::setDisplayerPointsFactory().

Constructor & Destructor Documentation

§ IlvChartDisplayerPointsFactory()

IlvChartDisplayerPointsFactory::IlvChartDisplayerPointsFactory ( )

protected

Constructor.

Initializes a new IlvChartDisplayerPointsFactory instance.

Member Function Documentation

§ copy()

virtual IlvChartDisplayerPointsFactory* IlvChartDisplayerPointsFactory::copy ( ) const

pure virtual

Virtual copy constructor.

Creates and returns a copy of the current object. This method must be overloaded in subclasses.

Returns: A copy of the current object.

Implemented in IlvChartPointsFilterFactory.

§ create()

virtual IlvChartDisplayerPoints* IlvChartDisplayerPointsFactory::create	(	const IlvChartGraphic *	chart,
		const IlvSingleChartDisplayer *	disp
	)

pure virtual

Creates an instance that handles data point projection.

Called by the IlvSingleChartDisplayer::allocDisplayerPoints() method to fetch the object used to project data points.

Parameters

chart	The chart that displays the data.
disp	The displayer for which the instance that handles data point projection is created.

Returns: An instance that will handle data point projection for the displayer disp.

Implemented in IlvChartPointsFilterFactory.

§ release()

virtual void IlvChartDisplayerPointsFactory::release	(	const IlvSingleChartDisplayer *	disp,
		IlvChartDisplayerPoints *	dispPts
	)

virtual

Free the created instance that handles data point projection.

Called by the IlvSingleChartDisplayer::releaseDisplayerPoints() method when the dispPts object is no longer used. The default implementation uses the delete operator on the dispPts object. This method can be overloaded to recycle the instance instead of deleting it.