LPointerPinchUpdateEvent Class Reference

Pointer pinch update gesture event. More...

#include <LPointerPinchUpdateEvent.h>

Inheritance diagram for LPointerPinchUpdateEvent:

Public Member Functions
	LPointerPinchUpdateEvent (UInt32 fingers=0, const LPointF &delta=LPointF(0.f, 0.f), const LPointF &deltaUnaccelerated=LPointF(0.f, 0.f), Float32 scale=1.f, Float32 rotation=0.f, UInt32 serial=LTime::nextSerial(), UInt32 ms=LTime::ms(), UInt64 us=LTime::us(), LInputDevice *device=nullptr) noexcept
	Constructs an LPointerPinchUpdateEvent object.
void	setFingers (UInt32 fingers) noexcept
	Sets the number of fingers involved in the pinch gesture.
UInt32	fingers () const noexcept
	Gets the number of fingers involved in the pinch gesture.
void	setDelta (const LPointF &delta) noexcept
	Sets the movement delta of the pinch gesture.
void	setDx (Float32 dx) noexcept
	Sets the movement delta along the x-axis of the pinch gesture.
void	setDy (Float32 dy) noexcept
	Sets the movement delta along the y-axis of the pinch gesture.
const LPointF &	delta () const noexcept
	Gets the movement delta of the pinch gesture.
void	setDeltaUnaccelerated (const LPointF &deltaUnaccelerated) noexcept
	Sets the unaccelerated movement delta of the pinch gesture.
void	setDxUnaccelerated (Float32 dx) noexcept
	Sets the unaccelerated movement delta along the x-axis of the pinch gesture.
void	setDyUnaccelerated (Float32 dy) noexcept
	Sets the unaccelerated movement delta along the y-axis of the pinch gesture.
const LPointF &	deltaUnaccelerated () const noexcept
	Gets the unaccelerated movement delta of the pinch gesture.
void	setScale (Float32 scale) noexcept
	Sets the scale factor of the pinch gesture.
Float32	scale () const noexcept
	Gets the scale factor of the pinch gesture.
void	setRotation (Float32 rotation) noexcept
	Sets the rotation angle of the pinch gesture.
Float32	rotation () const noexcept
	Gets the rotation angle of the pinch gesture.
Public Member Functions inherited from LInputEvent
void	setDevice (LInputDevice *device) noexcept
	Sets the input device that originated the event.
LInputDevice *	device () const noexcept
	Gets the input device that originated this event.
Public Member Functions inherited from LEvent
	~LEvent () noexcept=default
	Destructor.
Type	type () const noexcept
	Retrieves the type of the event.
Subtype	subtype () const noexcept
	Retrieves the subtype of the event.
void	setSerial (UInt32 serial) noexcept
	Sets the serial of the event.
UInt32	serial () const noexcept
	Retrieves the serial of the event.
void	setMs (UInt32 ms) noexcept
	Sets the time the event was generated in milliseconds.
UInt32	ms () const noexcept
	Retrieves the time the event was generated in milliseconds.
void	setUs (UInt32 us) noexcept
	Sets the time the event was generated in microseconds.
UInt64	us () const noexcept
	Retrieves the time the event was generated in microseconds.
LEvent *	copy () const noexcept
	Creates a deep copy of the event.

Additional Inherited Members
Public Types inherited from LEvent
enum class	Type : UInt8
	Defines the type of event. More...
enum class	Subtype : UInt8
	Defines the subtype of event. More...

Detailed Description

Pointer pinch update gesture event.

Constructor & Destructor Documentation

LPointerPinchUpdateEvent()

LPointerPinchUpdateEvent ( UInt32  fingers = 0, const LPointF &  delta = LPointF(0.f, 0.f), const LPointF &  deltaUnaccelerated = LPointF(0.f, 0.f), Float32  scale = 1.f, Float32  rotation = 0.f, UInt32  serial = LTime::nextSerial(), UInt32  ms = LTime::ms(), UInt64  us = LTime::us(), LInputDevice *  device = nullptr  )

inlinenoexcept

Constructs an LPointerPinchUpdateEvent object.

Parameters

fingers	The number of fingers involved in the pinch gesture.
delta	The movement delta of the pinch gesture.
deltaUnaccelerated	The unaccelerated movement delta of the pinch gesture.
scale	The scale factor of the pinch gesture.
rotation	The rotation angle of the pinch gesture.
serial	The serial number of the event.
ms	The millisecond timestamp of the event.
us	The microsecond timestamp of the event.
device	The input device that originated the event.

Member Function Documentation

setFingers()

void setFingers ( UInt32  fingers )

inlinenoexcept

Sets the number of fingers involved in the pinch gesture.

fingers()

UInt32 fingers ( ) const

inlinenoexcept

Gets the number of fingers involved in the pinch gesture.

setDelta()

void setDelta ( const LPointF &  delta )

inlinenoexcept

Sets the movement delta of the pinch gesture.

setDx()

void setDx ( Float32  dx )

inlinenoexcept

Sets the movement delta along the x-axis of the pinch gesture.

setDy()

void setDy ( Float32  dy )

inlinenoexcept

Sets the movement delta along the y-axis of the pinch gesture.

delta()

const LPointF & delta ( ) const

inlinenoexcept

Gets the movement delta of the pinch gesture.

setDeltaUnaccelerated()

void setDeltaUnaccelerated ( const LPointF &  deltaUnaccelerated )

inlinenoexcept

Sets the unaccelerated movement delta of the pinch gesture.

setDxUnaccelerated()

void setDxUnaccelerated ( Float32  dx )

inlinenoexcept

Sets the unaccelerated movement delta along the x-axis of the pinch gesture.

setDyUnaccelerated()

void setDyUnaccelerated ( Float32  dy )

inlinenoexcept

Sets the unaccelerated movement delta along the y-axis of the pinch gesture.

deltaUnaccelerated()

const LPointF & deltaUnaccelerated ( ) const

inlinenoexcept

Gets the unaccelerated movement delta of the pinch gesture.

setScale()

void setScale ( Float32  scale )

inlinenoexcept

Sets the scale factor of the pinch gesture.

scale()

Float32 scale ( ) const

inlinenoexcept

Gets the scale factor of the pinch gesture.

The scale begins at 1.0, and if e.g. the fingers moved together by 50% then the scale will become 0.5, if they move twice as far apart as initially the scale becomes 2.0, etc.

setRotation()

void setRotation ( Float32  rotation )

inlinenoexcept

Sets the rotation angle of the pinch gesture.

rotation()

Float32 rotation ( ) const

inlinenoexcept

Gets the rotation angle of the pinch gesture.

The angle delta is defined as the change in angle of the line formed by the 2 fingers of a pinch gesture. Clockwise rotation is represented by a positive delta, counter-clockwise by a negative delta. If e.g. the fingers are on the 12 and 6 location of a clock face plate and they move to the 1 resp. 7 location in a single event then the angle delta is 30 degrees.