IlvRectangularChartCursor Class Reference

Cursor subclass for Cartesian charts. More...

#include <ilviews/charts/cursor.h>

Inheritance diagram for IlvRectangularChartCursor:

List of all members.

Public Member Functions
	IlvRectangularChartCursor (IlDouble value, IlvPalette *palette=0)
	Constructor.
virtual void	delimiterBBox (const IlvSingleScaleDisplayer *scale, const IlvPoint &cursorPoint, IlDouble cursorAngle, const IlvRect &scaleDataDisplayArea, IlvRect &bbox) const
	Returns the bounding box of the delimiter.
virtual void	drawDelimiter (const IlvSingleScaleDisplayer *scale, const IlvPoint &cursorPoint, IlDouble cursorAngle, const IlvRect &scaleDataDisplayArea, IlvPort *dst, const IlvRegion *clip) const
	Draws the cursor delimiter.

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Detailed Description

Cursor subclass for Cartesian charts.

Library: ilvcharts

This class is a subclass of IlvAbstractChartCursor that allows you to define a rectangular cursor. A rectangular cursor associated with a given scale is a line orthogonal to the axis of this scale. This kind of cursor is used only for Cartesian charts. A Cartesian chart is a chart that displays data expressed in Cartesian coordinates with abscissa and ordinate scales that are orthogonal.

You can see an example of rectangular cursor on the figure below where a cursor is added to the ordinate scale of the displayed chart.

See also:

IlvAbstractChartCursor.

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Constructor & Destructor Documentation

IlvRectangularChartCursor::IlvRectangularChartCursor	(	IlDouble	value,
		IlvPalette *	palette = 0
	)

Constructor.

Initializes a new IlvRectangularChartCursor object.

Parameters:

	value	The cursor value.
	palette	The palette used to draw the cursor.

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Member Function Documentation

virtual void IlvRectangularChartCursor::delimiterBBox	(	const IlvSingleScaleDisplayer *	scale,
		const IlvPoint &	cursorPoint,
		IlDouble	cursorAngle,
		const IlvRect &	scaleDataDisplayArea,
		IlvRect &	bbox
	)			const [virtual]

Returns the bounding box of the delimiter.

This method must be defined in subclasses.

Parameters:

	scale	The scale to which the cursor is attached.
	cursorpoint	The point in view coordinates on the scale axis.
	cursorAngle	The direction angle of the cursor from the scale axis.
	scaleDataDisplayArea	The data display area of the corresponding scale.
	bbox	The returned bounding box.

Implements IlvAbstractChartCursor.

virtual void IlvRectangularChartCursor::drawDelimiter	(	const IlvSingleScaleDisplayer *	scale,
		const IlvPoint &	cursorPoint,
		IlDouble	cursorAngle,
		const IlvRect &	scaleDataDisplayArea,
		IlvPort *	dst,
		const IlvRegion *	clip
	)			const [virtual]

Draws the cursor delimiter.

This method must be defined in subclasses. The defined method should take into account the ghost drawing property of the delimiter (see the IlvAbstractChartCursor::isDrawingGhost method).

Parameters:

	scale	The scale to which the cursor is attached.
	cursorpoint	The point in view coordinates on the scale axis.
	cursorAngle	The direction angle of the cursor from the scale axis.
	scaleDataDisplayArea	The data display area of the corresponding scale.
	dst	The drawing port.
	clip	The drawing clip.

Implements IlvAbstractChartCursor.