SDLBackendSystem Class Reference

SDL-based implementation of the backend system interface. More...

#include <sdl_backend_system.h>

Inheritance diagram for SDLBackendSystem:

Public Member Functions
	SDLBackendSystem ()=default
void	initialize_listeners (std::unordered_map< SystemEvent, std::vector< BackendCallback > > *listeners) override
void	poll_events () override
	Polls for new events from the backend system.
void	init_frame_timer () override
	Initializes the internal timer for frame time calculation.
void	update_frame_time (float time_scale) override
	Updates the frame time based on the elapsed time since the last frame.
float	delta_time () const override
	Retrieves the time elapsed since the last frame.
float	frames_per_second () const override
	Retrieves the frames per second (FPS) based on the updated frame time.
std::string	get_clipboard_text () override
	Gets the current text from the system clipboard.
void	set_cursor_to_arrow () override
	Sets the cursor to the standard arrow shape.
void	set_cursor_to_hand () override
	Sets the cursor to the hand shape.
void	set_cursor_to_ibeam () override
	Sets the cursor to the I-beam shape.
void	set_cursor_to_crosshair () override
	Sets the cursor to the crosshair shape.
void	set_cursor_to_wait () override
	Sets the cursor to the wait (hourglass) shape.
Public Member Functions inherited from IBackendSystem
virtual	~IBackendSystem ()=default

Additional Inherited Members
Protected Attributes inherited from IBackendSystem
uint64_t	last_ {0}
double	freq_ {0.0f}
float	delta_time_ {0.0f}
int	frame_count_ {0}
float	fps_ {0.0f}
float	accumulated_time_ {0.0f}

Detailed Description

SDL-based implementation of the backend system interface.

Handles event polling and frame timing using SDL functions.

Constructor & Destructor Documentation

SDLBackendSystem()

SDLBackendSystem::SDLBackendSystem ( )

default

Member Function Documentation

delta_time()

float SDLBackendSystem::delta_time ( ) const

overridevirtual

Retrieves the time elapsed since the last frame.

Returns

The delta time in seconds.

Implements IBackendSystem.

frames_per_second()

float SDLBackendSystem::frames_per_second ( ) const

overridevirtual

Retrieves the frames per second (FPS) based on the updated frame time.

Returns

The current frames per second.

Implements IBackendSystem.

get_clipboard_text()

std::string SDLBackendSystem::get_clipboard_text ( )

overridevirtual

Gets the current text from the system clipboard.

Returns

The text from the clipboard.

Implements IBackendSystem.

init_frame_timer()

void SDLBackendSystem::init_frame_timer ( )

overridevirtual

Initializes the internal timer for frame time calculation.

Note

This method must be called before using update_frame_time or delta_time.

Implements IBackendSystem.

initialize_listeners()

void SDLBackendSystem::initialize_listeners ( std::unordered_map< SystemEvent, std::vector< BackendCallback > > *  listeners )

overridevirtual

Implements IBackendSystem.

poll_events()

void SDLBackendSystem::poll_events ( )

overridevirtual

Polls for new events from the backend system.

Should invoke registered callbacks for each event type as events are received and reinterpreted from SDL events.

Implements IBackendSystem.

set_cursor_to_arrow()

void SDLBackendSystem::set_cursor_to_arrow ( )

overridevirtual

Sets the cursor to the standard arrow shape.

Implements IBackendSystem.

set_cursor_to_crosshair()

void SDLBackendSystem::set_cursor_to_crosshair ( )

overridevirtual

Sets the cursor to the crosshair shape.

Implements IBackendSystem.

set_cursor_to_hand()

void SDLBackendSystem::set_cursor_to_hand ( )

overridevirtual

Sets the cursor to the hand shape.

Implements IBackendSystem.

set_cursor_to_ibeam()

void SDLBackendSystem::set_cursor_to_ibeam ( )

overridevirtual

Sets the cursor to the I-beam shape.

Implements IBackendSystem.

set_cursor_to_wait()

void SDLBackendSystem::set_cursor_to_wait ( )

overridevirtual

Sets the cursor to the wait (hourglass) shape.

Implements IBackendSystem.

update_frame_time()

void SDLBackendSystem::update_frame_time ( float  time_scale )

overridevirtual

Updates the frame time based on the elapsed time since the last frame.

Parameters

time_scale

A modifier to scale the delta time, useful for implementing slow-motion or speed-up effects.

Implements IBackendSystem.

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

• include/engine/core/system/strategy/sdl_backend_system.h