MayaFlux::Vruta::WindowEventSource Class Reference

Awaitable stream of window input events. More...

#include <WindowEventSource.hpp>

Inheritance diagram for MayaFlux::Vruta::WindowEventSource:

Collaboration diagram for MayaFlux::Vruta::WindowEventSource:

Public Member Functions
Kriya::WindowEventAwaiter	await_event (Core::WindowEventType type)
	Creates an awaiter that resumes on the next event matching a type.
void	clear () override
	Discards all buffered signals.
void	defer (std::function< void()> action)
	Run an action after the active outermost window-event dispatch.
std::pair< double, double >	get_mouse_position () const
	Returns the last known cursor position in screen coordinates.
bool	has_pending () const override
	Returns true if any signals are buffered and not yet consumed.
bool	is_key_pressed (IO::Keys key) const
	Returns true if the given key is currently held.
bool	is_mouse_pressed (int button) const
	Returns true if the given mouse button is currently held.
Kriya::WindowEventAwaiter	next_event ()
	Creates an awaiter that resumes on the next event of any type.
WindowEventSource &	operator= (const WindowEventSource &)=delete
WindowEventSource &	operator= (WindowEventSource &&) noexcept=default
size_t	pending_count () const
void	signal (Core::WindowEvent event)
	Enqueue a window event and resume matching waiters.
	WindowEventSource ()=default
	WindowEventSource (const WindowEventSource &)=delete
	WindowEventSource (WindowEventSource &&) noexcept=default
	~WindowEventSource () override=default
Public Member Functions inherited from MayaFlux::Vruta::EventSource
	EventSource ()=default
	EventSource (const EventSource &)=delete
	EventSource (EventSource &&) noexcept=default
EventSource &	operator= (const EventSource &)=delete
EventSource &	operator= (EventSource &&) noexcept=default
virtual	~EventSource ()=default

Static Public Attributes
static constexpr size_t	k_max_pending_events = 1024
	Most events of one type held for a later awaiter before the oldest of that type is dropped.

Private Member Functions
std::optional< Core::WindowEvent >	pop_event (const WindowEventFilter &filter)
	Removes and returns the first pending event matching the filter.

Private Attributes
std::unordered_map< int, bool >	m_button_states
std::vector< std::function< void()> >	m_deferred_actions
std::unordered_map< int16_t, bool >	m_key_states
double	m_mouse_x {}
double	m_mouse_y {}
std::array< size_t, 256 >	m_pending_counts {}
std::deque< Core::WindowEvent >	m_pending_events
size_t	m_resumed {}
size_t	m_signal_depth {}

Friends
class	Kriya::WindowEventAwaiter

Additional Inherited Members
Protected Member Functions inherited from MayaFlux::Vruta::EventSource
void	dispatch (const void *event)
	Iterates the waiter list, passing the type-erased signal to each.
void	register_waiter (Kriya::EventAwaiter *awaiter)
void	unregister_waiter (Kriya::EventAwaiter *awaiter)

Detailed Description

Awaitable stream of window input events.

Signals are produced by the window backend's poll(), on the polling thread. Coroutines suspend via WindowEventAwaiter and are resumed synchronously from signal(). Every suspended awaiter whose filter matches receives the event, in registration order. An event no awaiter took is queued until one arrives, up to k_max_pending_events per event type; beyond that the oldest queued event of the same type is dropped, so a flood of one type never evicts another. Tracks input state for immediate polling via is_key_pressed(), is_mouse_pressed(), and get_mouse_position().

See also

EventSource

WindowEventAwaiter

EventFilter

Definition at line 73 of file WindowEventSource.hpp.

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

• WindowEventSource.hpp
• WindowEventSource.cpp