LSceneTouchPoint Class Reference

Touch point managed within an LScene. More...

Inheritance diagram for LSceneTouchPoint:

Public Member Functions
LScene *	scene () const noexcept
	Scene this touch point belongs to. More...
Int32	id () const noexcept
	Gets the unique identifier of the touch point. More...
bool	pressed () const noexcept
	Check if the touch point is currently being pressed. More...
const std::vector< LView * > &	views () const noexcept
	Touched views. More...
const LPointF &	pos () const noexcept
	Gets the position of the touch point assigned by the last touch-down or move event. More...
Public Member Functions inherited from LObject
	LObject (const LObject &) noexcept
	Copy constructor. More...
LObject &	operator= (const LObject &) noexcept
	Assignment operator (each object has its own individual LWeak reference count). More...
void	setUserData (UIntPtr data) const noexcept
	Store an unsigned integer value/pointer. More...
UIntPtr	userData () const noexcept
	Retrieves the stored unsigned integer value/pointer. More...

Additional Inherited Members
Protected Member Functions inherited from LObject
	LObject () noexcept=default
	Constructor of the LObject class. More...
virtual	~LObject () noexcept
	Destructor of the LObject class. More...
void	notifyDestruction () noexcept
	Notifies the object destruction. More...

Detailed Description

Touch point managed within an LScene.

This class behaves similarly to LTouchPoint but its lifetime is managed by its parent LScene handleTouchXXX events.

See also

LTouchPoint for understanding the lifetime of a touch point.

To access all active touch points of an LScene, see LScene::touchPoints().

Note

For an LView to be capable of receiving touch events, LView::touchEventsEnabled() must be set to true.

Member Function Documentation

scene()

LScene* scene ( ) const

inlinenoexcept

Scene this touch point belongs to.

id()

Int32 id ( ) const

inlinenoexcept

Gets the unique identifier of the touch point.

Each touch point is assigned a unique identifier, ensuring that there are no two touch points with the same ID.

Returns

The unique identifier of the touch point.

pressed()

bool pressed ( ) const

inlinenoexcept

Check if the touch point is currently being pressed.

views()

const std::vector<LView*>& views ( ) const

inlinenoexcept

Touched views.

A vector of views being touched by this touch point.

Views with the LView::blockTouchEnabled() property set to false allow views behind them to receive touch events as well. In such cases, the vector contains the views ordered from topmost to bottommost.

pos()

const LPointF& pos ( ) const

inlinenoexcept

Gets the position of the touch point assigned by the last touch-down or move event.

The position is represented in a coordinate space ranging from 0 to 1 for both the x and y axes.

Returns

A constant reference to the position of the touch point.