Gestures

touchgfx/hal/Gestures.hpp

This class implements the detection of gestures.

Public Functions

	Gestures()
	Default constructor.
void	registerClickEvent(ClickEvent::ClickEventType event, uint16_t x, uint16_t y)
	Register a click event and figure out if this is a drag event, too.
bool	registerDragEvent(uint16_t oldX, uint16_t oldY, uint16_t newX, uint16_t newY)
	Register a drag event.
void	registerEventListener(UIEventListener & l)
	Register the event listener.
void	setDragThreshold(uint16_t val)
	Configure the threshold for reporting drag events.
void	tick()
	Has to be called during the timer tick.

Public Functions Documentation

Gestures

Gestures	(			)

Default constructor.

Does nothing.

registerClickEvent

void registerClickEvent	(	ClickEvent::ClickEventType	event ,
		uint16_t	x ,
		uint16_t	y
		)

Register a click event and figure out if this is a drag event, too.

Parameters:

event	The type of the click event.
x	The x coordinate of the click event.
y	The y coordinate of the click event.

registerDragEvent

bool registerDragEvent	(	uint16_t	oldX ,
		uint16_t	oldY ,
		uint16_t	newX ,
		uint16_t	newY
		)

Register a drag event.

Parameters:

oldX	The x coordinate of the drag start position (dragged from)
oldY	The y coordinate of the drag start position (dragged from)
newX	The x coordinate of the new position (dragged to)
newY	The y coordinate of the new position (dragged to)

Returns:

True if the drag exceeds threshold value (and therefore was reported as a drag), or false if the drag did not exceed threshold (and therefore was discarded).

registerEventListener

void registerEventListener	(	UIEventListener &	l	)

Register the event listener.

Parameters:

l	The EventListener to register.

setDragThreshold

void setDragThreshold	(	uint16_t	val	)

Configure the threshold for reporting drag events.

A touch input movement must exceed this value in either axis in order to report a drag. Default value is 0.

Parameters:

val	New threshold value.

tick

void tick	(			)

Has to be called during the timer tick.