Class: Fusuma::Plugin::Detectors::TapDetector

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

Overview

Detect tap event

Constant Summary collapse

SOURCES = 
['tap', 'gesture', 'timer']
BUFFER_TYPE = 
'tap'
GESTURE_RECORD_TYPE = 
'tap'
BASE_INTERVAL = 
0.5
BASE_HOLDING_TIME = 
0.1
BASE_TAP_TIME = 
0.4

Instance Method Summary collapse

Instance Method Details

#calc_holding_time(tap_buffer:, timer_buffer:) ⇒ Object 



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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 104

def calc_holding_time(tap_buffer:, timer_buffer:)
  last_time = if timer_buffer && !timer_buffer.empty? &&
                 (tap_buffer.events.last.time < timer_buffer.events.last.time)
                timer_buffer.events.last.time
              else
                tap_buffer.events.last.time
              end
  last_time - tap_buffer.events.first.time
end

#create_index(finger:, direction:) ⇒ Config::Index

Returns:

  • (Config::Index) 


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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 52

def create_index(finger:, direction:)
  Config::Index.new(
    [
      Config::Index::Key.new(direction),
      Config::Index::Key.new(finger.to_i)
    ]
  )
end

#detect(buffers) ⇒ Event, NilClass

Parameters:

  • buffers (Array<Buffer>)

Returns:

  • (Event) —

    if event is detected

  • (NilClass) —

    if event is NOT detected



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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 21

def detect(buffers)
  tap_buffer = buffers.find { |b| b.type == BUFFER_TYPE }
  gesture_buffer = buffers.find { |b| b.type == 'gesture' }
  timer_buffer = buffers.find { |b| b.type == 'timer' }

  if tap_buffer.empty? || moved?(tap_buffer: tap_buffer, gesture_buffer: gesture_buffer)
    return
  end

  holding_time = calc_holding_time(tap_buffer: tap_buffer, timer_buffer: timer_buffer)

  direction = if hold?(tap_buffer, holding_time)
                'hold'
              elsif tap?(tap_buffer, holding_time)
                'tap'
              end

  return if direction.nil?

  finger = tap_buffer.finger

  tap_buffer.clear # NOTE: Clear after detecting hold

  index = create_index(finger: finger, direction: direction)

  return unless enough?(index: index, direction: direction)

  create_event(record: Events::Records::IndexRecord.new(index: index))
end

#hold?(buffer, holding_time) ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 62

def hold?(buffer, holding_time)
  return false if holding_time < 0.7

  return true if buffer.finger == 4

  true if buffer.events.any? { |e| e.record.status == 'hold' }
end

#moved?(tap_buffer:, gesture_buffer:) ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 78

def moved?(tap_buffer:, gesture_buffer:)
  tap_buffer.events.any? { |e| e.record.status == 'move' } ||
    # FIXME: Find good parameter for ignoring
    gesture_buffer.events.count { |e| tap_buffer.events.first.time < e.time } > 5
end

#released_all?(buffer) ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 85

def released_all?(buffer)
  touch_num = buffer.events.count { |e| (e.record.status =~ /begin|touch/) }
  release_num = buffer.events.count { |e| e.record.status =~ /release|end/ }
  MultiLogger.debug(touch_num: touch_num, release_num: release_num)

  case buffer.finger
  when 1
    touch_num == release_num
  when 2
    touch_num == release_num + 1
  when 3
    touch_num == release_num + 1
  when 4
    touch_num > 0 && release_num > 0
  else
    false
  end
end

#tap?(buffer, holding_time) ⇒ TrueClass, FalseClass

Returns:

  • (TrueClass, FalseClass) 


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# File 'lib/fusuma/plugin/detectors/tap_detector.rb', line 71

def tap?(buffer, holding_time)
  return false if holding_time > 0.15

  released_all?(buffer)
end