IlvChartCrossHairInteractor Class Reference

Displays a crosshair that tracks the pointing device. More...

#include <ilviews/charts/chartint.h>

Inheritance diagram for IlvChartCrossHairInteractor:

Public Member Functions
	IlvChartCrossHairInteractor ()
	Constructor. More...
virtual IlBoolean	handleEvent (IlvGraphic *chart, IlvEvent &ev, const IlvTransformer *t=0)
	Handles events received by the interactor. More...
virtual IlBoolean	isShowingAbscissaCursor () const
	Indicates whether the interactor uses a cursor on the abscissa. More...
virtual IlBoolean	isShowingOrdinateCursor () const
	Indicates whether the interactor uses a cursor on the ordinate. More...
Public Member Functions inherited from IlvChartInteractor
virtual void	endSequence (IlvChartGraphic *chart, const IlvEvent &event, const IlvTransformer *t)
	Performs the actions needed when an interactor leaves an event sequence. More...
IlBoolean	isShared () const
	Indicates whether the current object is a shared instance. More...
virtual void	startSequence (IlvChartGraphic *chart, const IlvEvent &event, const IlvTransformer *t)
	Performs the actions needed when an interactor enters an event sequence. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvChartInteractor
static IlvChartInteractor *	Get (const char *name)
	Returns a shared interactor instance. More...
Protected Member Functions inherited from IlvChartInteractor
	IlvChartInteractor ()
	Constructor. More...

Detailed Description

Displays a crosshair that tracks the pointing device.

Library: ilvcharts

This class allows the user to trigger the visibility of a crosshair that will follow the movement of the mouse. The crosshair can be made of one or both of the cursors accessible from the interactors (abscissa/ordinate). These cursors are managed by the interactor manager instance that is associated with the interactive chart. The visibility of each cursor is defined both globally at the manager level (IlvChartInteractorManager::isShowingAbscissaCursor and IlvChartInteractorManager::isShowingOrdinateCursor) and locally by each interactor (IlvChartInteractor::isShowingAbscissaCursor and IlvChartInteractor::isShowingOrdinateCursor). This interactor works by turning on or off the global visibility of the cursors when the IlvKeyDown 'C' event is received.

The registered name of this interactor class is "ChartCrossHair".

Constructor & Destructor Documentation

IlvChartCrossHairInteractor()

IlvChartCrossHairInteractor::IlvChartCrossHairInteractor

(

)

Constructor.

Initializes a new IlvChartCrossHairInteractor object.

Member Function Documentation

handleEvent()

virtual IlBoolean IlvChartCrossHairInteractor::handleEvent ( IlvGraphic *  chart, IlvEvent &  event, const IlvTransformer *  t = 0  )

virtual

Handles events received by the interactor.

This method is the entry point of all events dispatched to this interactor.

Parameters

chart	The chart object that received the event.
event	The received event.
t	The transformer applied to the view in which the event occurred.

Returns

IlTrue if the event was successfully handled and IlFalse otherwise.

Implements IlvChartInteractor.

isShowingAbscissaCursor()

virtual IlBoolean IlvChartCrossHairInteractor::isShowingAbscissaCursor ( ) const

virtual

Indicates whether the interactor uses a cursor on the abscissa.

Interactor instances will use the API of IlvChartInteractorManager to display and move the corresponding cursor. If this method returns IlTrue and IlvChartInteractorManager::isShowingAbscissaCursor also returns IlTrue, the cursor will be displayed during the event sequence handled by this interactor. The default implementation returns IlFalse.

Returns

IlTrue if the interactor uses an abscissa cursor and IlFalse otherwise.

See also

IlvChartInteractorManager.

Reimplemented from IlvChartInteractor.

isShowingOrdinateCursor()

virtual IlBoolean IlvChartCrossHairInteractor::isShowingOrdinateCursor ( ) const

virtual

Indicates whether the interactor uses a cursor on the ordinate.

Interactor instances will use the API of IlvChartInteractorManager to display and move the corresponding cursor. If this method returns IlTrue and IlvChartInteractorManager::isShowingAbscissaCursor also returns IlTrue, the cursor will be displayed during the event sequence handled by this interactor.

Returns

IlTrue if the interactor uses an ordinate cursor and IlFalse otherwise.

See also

IlvChartInteractorManager.

Reimplemented from IlvChartInteractor.