Class: Rubydraw::EventQueue

Inherits:
Object show all
Defined in:
lib/rubydraw/event_queue.rb

Overview

Rubydraw uses an EventQueue to collect SDL events, e.g. mouse movements keystrokes, and window actions. A new EventQueue is automatically created when a Rubydraw::Window is initialized. Every tick, the window asks its event queue (created in Rubydraw::Window#initialize) for the new events

Instance Method Summary collapse

Constructor Details

#initialize ⇒ EventQueue

Returns a new instance of EventQueue.



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# File 'lib/rubydraw/event_queue.rb', line 7

def initialize
  @keys_being_repeated = []
end

Instance Method Details

#exp_get_events ⇒ Object 



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# File 'lib/rubydraw/event_queue.rb', line 30

def exp_get_events
  events = []
  until((event = SDL::PollEvent()).nil?)
    new_event = Events.match(event)
    events << new_event
    key = new_event.key if new_event.is_a?(Events::KeyboardEvent)
    if new_event.is_a?(Events::KeyReleased) and @keys_being_repeated.include?(key)
      @keys_being_repeated.delete(key)
    end
    # Synthesize each key that is being held.
    @keys_being_repeated.each {|num| events << Events::KeyPressed.new(num)}
    # Start adding keys that are held, and remove keys that are no longer
    # being held (whenever a Events::KeyReleased is created).
    if new_event.is_a?(Events::KeyPressed)
      @keys_being_repeated << key
    end
  end
  puts @keys_being_repeated.size
  events
end

#get_events ⇒ Object

Get all the new events



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# File 'lib/rubydraw/event_queue.rb', line 14

def get_events
  events = []
  until ((event = SDL.PollEvent) == nil)
    new_event = Events.match(event)
    if new_event.is_a?(Events::KeyReleased)
      @keys_being_repeated.delete(new_event.key)
    end
    if new_event.is_a?(Events::KeyPressed) and not @keys_being_repeated.include?(new_event.key)
      @keys_being_repeated << new_event.key
    end
    events << new_event
  end
  @keys_being_repeated.each {|num| events << Events::KeyPressed.new(num)}
  events
end

#key_repeat ⇒ Object 



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# File 'lib/rubydraw/event_queue.rb', line 10

def key_repeat
  Rubydraw.key_repeat
end