pointing::TransferFunction Class Reference

The TransferFunction class is an abstract class that creates an object of its concrete subclasses. More...

#include <TransferFunction.h>

Inheritance diagram for pointing::TransferFunction:

Public Member Functions
virtual void	clearState (void)=0
	Method which clears the current state of the device to be the default one (without any remainders or previous data).
virtual void	applyi (int dxMickey, int dyMickey, int *dxPixel, int *dyPixel, TimeStamp::inttime timestamp=TimeStamp::undef)=0
	apply The main method of the class which applies the transfer function. More...
virtual void	applyd (int dxMickey, int dyMickey, double *dxPixel, double *dyPixel, TimeStamp::inttime timestamp=TimeStamp::undef)=0
	apply The main method of the class which applies the transfer function. More...
virtual URI	getURI (bool expanded=false) const =0
	getURI The method constructs URI corresponding to the type and parameters of the transfer function. More...
virtual void	setDebugLevel (int)
	Sets the level of information for debugging purposes (default = 0).
virtual void	debug (std::ostream &) const

Static Public Member Functions
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
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 TransferFunction class is an abstract class that creates an object of its concrete subclasses.

Subclasses may caracterize either platform specific transfer functions or transfer functions conforming to a certain law. It uses URIs to specify the object type.

Member Function Documentation

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

pure 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

Implemented in pointing::SubPixelFunction, pointing::Interpolation, pointing::Composition, pointing::SigmoidFunction, pointing::ConstantFunction, and pointing::NaiveConstantFunction.

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

pure 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

Implemented in pointing::SubPixelFunction, pointing::Interpolation, pointing::Composition, pointing::SigmoidFunction, pointing::ConstantFunction, and pointing::NaiveConstantFunction.

TransferFunction * pointing::TransferFunction::create ( const char *  function_uri, PointingDevice *  input, DisplayDevice *  output  )

static

Static method to instantiate an object of a sub-class.

Parameters

function_uri	URI defining the type and details of an object
input	Input device associated with this transfer function.
output	Output device associated with this transfer function

Returns

Pointer to the initialized transfer function.

virtual URI pointing::TransferFunction::getURI ( bool  expanded = false ) const

pure 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.

Implemented in pointing::SubPixelFunction, pointing::Interpolation, pointing::Composition, pointing::SigmoidFunction, pointing::ConstantFunction, and pointing::NaiveConstantFunction.

void pointing::TransferFunction::normalizeInput ( int *  dx, int *  dy, PointingDevice *  input  ) const

protected

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()

Parameters

dx	Input x-displacement
dy	Input y-displacement
input	Given PointingDevice

void pointing::TransferFunction::normalizeOutput ( int *  dx, int *  dy, DisplayDevice *  output  ) const

protected

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()

Parameters

dx	x-pixel-displacement
dy	y-pixel-displacement
output	Given DisplayDevice

---

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

• TransferFunction.h
• TransferFunction.cpp