pointing::Composition Class Reference

The Composition class can be used to apply several transfer functions to the input. More...

#include <Composition.h>

Inheritance diagram for pointing::Composition:

Public Member Functions
	Composition (URI &uri, PointingDevice *input, DisplayDevice *output)
unsigned long	size (void) const
void	clearState (void)
	Method which clears the current state of the device to be the default one (without any remainders or previous data).
void	applyi (int dxMickey, int dyMickey, int *dxPixel, int *dyPixel, TimeStamp::inttime timestamp=TimeStamp::undef)
	apply The main method of the class which applies the transfer function. More...
void	applyd (int dxMickey, int dyMickey, double *dxPixel, double *dyPixel, TimeStamp::inttime timestamp=TimeStamp::undef)
	apply The main method of the class which applies the transfer function. More...
URI	getURI (bool expanded=false) const
	getURI The method constructs URI corresponding to the type and parameters of the transfer function. More...
void	prependFunction (std::string uri)
	prependFunction is used to add a function to the beginning of the list so that it is called at the beginning. URI, URI string specifying a transfer function or transfer function itself may be passed as an argument.
void	prependFunction (URI &uri)
void	prependFunction (TransferFunction *function)
void	appendFunction (std::string uri)
	appendFunction is used to add a function to the end of the list so that it is called at the after all the functions in the list. URI, URI string specifying a transfer function or transfer function itself may be passed as an argument.
void	appendFunction (URI &uri)
void	appendFunction (TransferFunction *function)
Public Member Functions inherited from pointing::TransferFunction
virtual void	setDebugLevel (int)
	Sets the level of information for debugging purposes (default = 0).
virtual void	debug (std::ostream &) const

Additional Inherited Members
Static Public Member Functions inherited from pointing::TransferFunction
static std::list< std::string >	schemes (void)
static TransferFunction *	create (const char *function_uri, PointingDevice *input, DisplayDevice *output)
	Static method to instantiate an object of a sub-class. More...
static TransferFunction *	create (std::string function_uri, PointingDevice *input, DisplayDevice *output)
static TransferFunction *	create (URI &function_uri, PointingDevice *input, DisplayDevice *output)
Protected Member Functions inherited from pointing::TransferFunction
void	normalizeInput (int *dx, int *dy, PointingDevice *input) const
	normalizeInput Normalizes input to a transfer function with respect to the given PointingDevice. For example, to prevent fast movements of the cursor for high resolution mice. dx and dy are changed according to the input->getResolution() More...
void	normalizeOutput (int *dx, int *dy, DisplayDevice *output) const
	normalizeOutput Normalizes output of a transfer function with respect to the given DisplayDevice. For example, to prevent slow movements of the cursor for high resolution display. dx and dy are changed according to the output->getResolution() More...

Detailed Description

The Composition class can be used to apply several transfer functions to the input.

It is called by specifying URI as composition:<filename> where filename is read line by line, where each line must represent a transfer function. function are called in appearing order, i.e. pixels = fn(...f2(f1(mickeys)))

A function can be added to the start or to the end of the function list.

Member Function Documentation

void pointing::Composition::applyd ( int  dxMickey, int  dyMickey, double *  dxPixel, double *  dyPixel, TimeStamp::inttime  timestamp = TimeStamp::undef  )

virtual

apply The main method of the class which applies the transfer function.

Parameters

dxMickey	Translation in dots of the input device along x direction.
dyMickey	Translation in dots of the input device along y direction.
dxPixel	(Double) Computed translation in pixels of the output device along x direction.
dyPixel	(Double) Computed translation in pixels of the output device along y direction.
timestamp

Implements pointing::TransferFunction.

void pointing::Composition::applyi ( int  dxMickey, int  dyMickey, int *  dxPixel, int *  dyPixel, TimeStamp::inttime  timestamp = TimeStamp::undef  )

virtual

apply The main method of the class which applies the transfer function.

Parameters

dxMickey	Translation in dots of the input device along x direction.
dyMickey	Translation in dots of the input device along y direction.
dxPixel	(Integer) Computed translation in pixels of the output device along x direction.
dyPixel	(Integer) Computed translation in pixels of the output device along y direction.
timestamp

Implements pointing::TransferFunction.

URI pointing::Composition::getURI ( bool  expanded = false ) const

virtual

getURI The method constructs URI corresponding to the type and parameters of the transfer function.

Parameters

expanded

Indicates whether all parameters must be included in URI.

Returns

URI result.

Implements pointing::TransferFunction.

unsigned long pointing::Composition::size ( void  ) const

inline

Returns

The number of transfer functions.

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The documentation for this class was generated from the following files:

• Composition.h
• Composition.cpp