RotaryEncoder Class Reference

#include <SwitchInput.h>

Inheritance diagram for RotaryEncoder:

Public Member Functions
	RotaryEncoder (EncoderCallbackFn callback)
	RotaryEncoder (EncoderListener *listener)
void	changePrecision (uint16_t maxValue, int currentValue, bool rolloverOnMax=false, int step=1)
void	replaceCallback (EncoderCallbackFn callbackFn)
void	replaceCallbackListener (EncoderListener *callbackFn)
int	getCurrentReading () const
void	setCurrentReading (int reading)
void	increment (int8_t incVal)
virtual void	encoderChanged ()
bool	didLastSyncSucceed ()
void	setUserIntention (EncoderUserIntention intention)
EncoderUserIntention	getUserIntention ()
void	runCallback (int newVal)
bsize_t	getMaximumValue ()

Protected Types
enum	EncoderFlagBits { LAST_SYNC_STATUS =0 , WRAP_AROUND_MODE , OO_LISTENER_CALLBACK , LAST_ENCODER_DIRECTION_UP }

Protected Attributes
uint16_t	maximumValue
uint16_t	currentReading
uint8_t	stepSize
union {
EncoderCallbackFn	callback
EncoderListener *	encoderListener
}	notify
uint8_t	flags
EncoderUserIntention	intent

Detailed Description

Rotary encoder is the base class of both the hardware rotary encoder and the up / down button version. It handles storing the current value, setting and managing the range of allowed values and calling back when the encoder changes.

Member Function Documentation

changePrecision()

void RotaryEncoder::changePrecision	(	uint16_t	maxValue,
		int	currentValue,
		bool	rolloverOnMax = false,
		int	step = 1 )

Change the precision of the rotary encoder, setting the maximum allowable value and the current value. If you set the maximum value to a positive value, then the encoder will work like a potentiometer between 0 and the maximum value. However, if you set maximum to zero, then the encoder works in direction mode, where you'll get called back with either 0-unchanged, 1-up, -1-down.

Parameters

maxValue	the largest value allowed or zero for direction only mode
currentValue	the current value (zero for direction mode)

replaceCallback()

void RotaryEncoder::replaceCallback

(

EncoderCallbackFn

callbackFn

)

Change the callback that will be used to notify of changes in the encoder value, this must never be null.

Parameters

callbackFn

the new callback function

replaceCallbackListener()

void RotaryEncoder::replaceCallbackListener

(

EncoderListener *

callbackFn

)

Change the callback that will be used to notify of changes in the encoder value, this must never be null.

Parameters

callbackFn

the new callback function

getCurrentReading()

int RotaryEncoder::getCurrentReading ( ) const

inline

Gets the current value of the encoder.

setCurrentReading()

void RotaryEncoder::setCurrentReading ( int reading )

inline

Sets the current value of the encoder.

Parameters

reading

will become the new current value.

increment()

void RotaryEncoder::increment

(

int8_t

incVal

)

Change the value represented by the encoder by incVal. Normally called internally.

Parameters

incVal

the amount by which to change the encoder.

encoderChanged()

virtual void RotaryEncoder::encoderChanged ( )

inlinevirtual

internal method not for external use..

Reimplemented in HardwareRotaryEncoder, and HwStateRotaryEncoder.

didLastSyncSucceed()

bool RotaryEncoder::didLastSyncSucceed ( )

inline

Used to get the last sync status of the underlying IoAbstraction. Useful when working with devices over i2c to check if the comms worked.

Returns

true if the sync was successful, otherwise.

setUserIntention()

void RotaryEncoder::setUserIntention

(

EncoderUserIntention

intention

)

For joystick and up/down button encoders there is a difference between scroll using the encoder, and presenting the menu using the encoder, unlike rotary encoders where both modes feel natural the same way, there is a need to invert scrolling on button and joysticks.

getMaximumValue()

bsize_t RotaryEncoder::getMaximumValue ( )

inline

Returns

the maximum value that this encoder can be set to.

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

• src/SwitchInput.h
• src/SwitchInput.cpp