IlvZoomScaleStepsUpdater Class Reference

Class for computing the graduations of a scale. More...

#include <ilviews/charts/scaledis.h>

Inheritance diagram for IlvZoomScaleStepsUpdater:

List of all members.

Public Member Functions
	IlvZoomScaleStepsUpdater (IlvSingleScaleDisplayer *scale)
	Constructor.
virtual char *	computeStepLabel (IlDouble value) const
	Computes and returns the label displayed for a given data value.
virtual void	getStepSubStepValues (const IlvProjectorArea &area, IlUInt &stepsCount, IlDouble *&stepValues, IlUInt &subStepsCount, IlDouble *&subStepValues) const
	Computes and returns the step and substep values for the associated scale.

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Detailed Description

Class for computing the graduations of a scale.

Library: ilvcharts

IlvZoomScaleStepsUpdater is a subclass of IlvScaleStepsUpdater that allows you to display graduations that are zoomed locally on a part of the scale and that are displayed normally on the rest of the scale.

Warning:

This class can be used to compute the steps for a given scale only if a transformer of the IlvZoomCoordinateTransformer type is also set on the coordinate represented by the scale.

See also:

IlvScaleStepsUpdater, IlvSingleScaleDisplayer.

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Constructor & Destructor Documentation

IlvZoomScaleStepsUpdater::IlvZoomScaleStepsUpdater

(

IlvSingleScaleDisplayer *

scale

)

Constructor.

Initializes a new IlvZoomScaleStepsUpdater object.

Parameters:

scale

The scale associated with the current scale steps updater.

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Member Function Documentation

virtual char* IlvZoomScaleStepsUpdater::computeStepLabel

(

IlDouble

value

)

const [virtual]

Computes and returns the label displayed for a given data value.

Parameters:

value

The data value for which the label to be displayed is computed.

Reimplemented from IlvScaleStepsUpdater.

virtual void IlvZoomScaleStepsUpdater::getStepSubStepValues	(	const IlvProjectorArea &	area,
		IlUInt &	stepsCount,
		IlDouble *&	stepValues,
		IlUInt &	subStepsCount,
		IlDouble *&	subStepValues
	)			const [virtual]

Computes and returns the step and substep values for the associated scale.

Parameters:

	area	The data area definition. This data area definition can be retrieved with the IlvChartGraphic::getProjectorArea method.
	stepsCount	Returns the number of major steps.
	stepValues	Returns the values associated with the major steps.
	subStepsCount	Returns the number of minor steps.
	subStepValues	Returns the values associated with the minor steps.

Implements IlvScaleStepsUpdater.