IlvPolarChart Class Reference

Implementation of predefined polar charts. More...

#include <ilviews/charts/simplegr.h>

Inheritance diagram for IlvPolarChart:

List of all members.

Public Member Functions
	IlvPolarChart (IlvDisplay *display, const IlvRect &bbox, IlBoolean useGrid=IlFalse, IlDouble startingAngle=0.0, IlDouble range=0.0, IlBoolean orientedClockwise=IlFalse, IlvPalette *palette=0, IlvPalette *gridPalette=0)
	Constructor.

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Detailed Description

Implementation of predefined polar charts.

Library: ilvcharts

This class is a subclass of IlvChartGraphic which allows you to display a polar chart.

A polar chart represents data in a circular way: the data are expressed in polar coordinates (theta, rho). The abscissa values theta are mapped along a circular scale. The ordinate scales which represent the rho coordinate are radial.

Example of a polar chart:

See also:

IlvChartGraphic.

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Constructor & Destructor Documentation

IlvPolarChart::IlvPolarChart	(	IlvDisplay *	display,
		const IlvRect &	bbox,
		IlBoolean	useGrid = IlFalse,
		IlDouble	startingAngle = 0.0,
		IlDouble	range = 0.0,
		IlBoolean	orientedClockwise = IlFalse,
		IlvPalette *	palette = 0,
		IlvPalette *	gridPalette = 0
	)

Constructor.

Initializes a new IlvPolarChart object. The constructor creates a polar chart with two default scales. The associated projector is an instance of IlvPolarProjector initialized with startingAngle and range. The abscissa scale is an instance of IlvCircularScaleDisplayer and the ordinate scale is an instance of IlvRectangularScaleDisplayer.

Warning:

[note] The value set for range depends on the data you want to display with the current polar chart. If the data that will be finally projected into screen coordinates have their abscissa that are expressed in degrees, the range range must be equal to 0. Otherwise it must represent the angle range within which the data will be projected on the screen. See the IlvPolarProjector class for more details.

Parameters:

	display	The display connection that will handle the drawing of this object.
	bbox	The initial bounding box of the chart graphic.
	useGrid	A Boolean indicating whether grids should be added to created scales.
	startingAngle	The starting angle of the associated polar projector.
	range	The range of the associated polar projector.
	orientedClockwise	A Boolean indicating whether the projector should be oriented clockwise (IlTrue) or counter-clockwise (IlFalse).
	palette	The palette associated with the chart.
	gridPalette	The palette associated with the grids. (This is meaningful only if useGrid is equal to IlTrue).