Class: Fusuma::Plugin::Detectors::HoldDetector

Inherits:
Detector
  • Object
show all
Defined in:
lib/fusuma/plugin/detectors/hold_detector.rb

Overview

Detect Hold gesture

Constant Summary collapse

SOURCES = 
%w[gesture timer].freeze
BUFFER_TYPE = 
"gesture"
GESTURE_RECORD_TYPE = 
"hold"
BASE_THRESHOLD = 
0.7

Instance Attribute Summary

Attributes inherited from Detector

#tag, #type

Instance Method Summary collapse

Methods inherited from Detector

#create_event, #first_time?, #last_time, #sources, tag, type, #watch?

Methods inherited from Base

#config_index, #config_param_types, #config_params, inherited, plugins, #shutdown

Constructor Details

#initialize(*args) ⇒ HoldDetector

Returns a new instance of HoldDetector.



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# File 'lib/fusuma/plugin/detectors/hold_detector.rb', line 17

def initialize(*args)
  super
  @timer = Inputs::TimerInput.instance
end

Instance Method Details

#create_oneshot_index(finger:) ⇒ Config::Index

Parameters:

  • finger (Integer)

Returns:



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# File 'lib/fusuma/plugin/detectors/hold_detector.rb', line 80

def create_oneshot_index(finger:)
  Config::Index.new(
    [
      Config::Index::Key.new(type),
      Config::Index::Key.new(finger.to_i)
    ]
  )
end

#create_repeat_index(finger:, status:) ⇒ Config::Index

Parameters:

  • finger (Integer)

Returns:



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# File 'lib/fusuma/plugin/detectors/hold_detector.rb', line 91

def create_repeat_index(finger:, status:)
  Config::Index.new(
    [
      Config::Index::Key.new(type),
      Config::Index::Key.new(finger.to_i),
      Config::Index::Key.new(status)
    ]
  )
end

#detect(buffers) ⇒ Events::Event, ...

Parameters:

Returns:

  • (Events::Event) —

    if event is detected

  • (Array<Events::Event>) —

    if hold end event is detected

  • (NilClass) —

    if event is NOT detected



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# File 'lib/fusuma/plugin/detectors/hold_detector.rb', line 26

def detect(buffers)
  hold_buffer = find_hold_buffer(buffers)
  return if hold_buffer.empty?

  last_hold = hold_buffer.events.last

  timer_buffer = buffers.find { |b| b.type == "timer" }
  last_timer = timer_buffer.events.last

  finger = hold_buffer.finger
  holding_time = calc_holding_time(hold_events: hold_buffer.events, last_timer: last_timer)

  status = case last_hold.record.status
  when "begin"
    if holding_time.zero?
      "begin"
    else
      "timer"
    end
  when "cancelled"
    "cancelled"
  when "end"
    "end"
  else
    last_record = last_hold.record.status
    raise "Unexpected Status:#{last_record.status} in #{last_record}"
  end

  repeat_index = create_repeat_index(finger: finger, status: status)
  oneshot_index = create_oneshot_index(finger: finger)

  if status == "begin"
    @timeout = nil
    if threshold(index: oneshot_index) < @timer.interval
      @timer.wake_early(Time.now + threshold(index: oneshot_index))
    end
  elsif status == "timer"
    return if @timeout

    return unless enough?(index: oneshot_index, holding_time: holding_time)

    @timeout = holding_time
    return create_event(record: Events::Records::IndexRecord.new(
      index: oneshot_index, trigger: :oneshot
    ))
  end

  create_event(record: Events::Records::IndexRecord.new(
    index: repeat_index, trigger: :repeat
  ))
end