Class: Fusuma::Plugin::Detectors::SwipeDetector

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

Defined Under Namespace

Classes: Direction, Quantity

Constant Summary collapse

SOURCES =
['gesture'].freeze
BUFFER_TYPE =
'gesture'
GESTURE_RECORD_TYPE =
'swipe'
FINGERS =
[3, 4].freeze
BASE_THERESHOLD =
25

Instance Method Summary collapse

Methods inherited from Detector

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

Methods inherited from Base

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

Methods included from CustomProcess

#fork

Instance Method Details

#create_oneshot_index(gesture:, finger:, direction:) ⇒ Config::Index

Parameters:

Returns:



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# File 'lib/fusuma/plugin/detectors/swipe_detector.rb', line 108

def create_oneshot_index(gesture:, finger:, direction:)
  Config::Index.new(
    [
      Config::Index::Key.new(gesture),
      Config::Index::Key.new(finger.to_i, skippable: true),
      Config::Index::Key.new(direction)
    ]
  )
end

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

Parameters:

Returns:



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# File 'lib/fusuma/plugin/detectors/swipe_detector.rb', line 93

def create_repeat_index(gesture:, finger:, direction:, status:)
  Config::Index.new(
    [
      Config::Index::Key.new(gesture),
      Config::Index::Key.new(finger.to_i),
      Config::Index::Key.new(direction, skippable: true),
      Config::Index::Key.new(status)
    ]
  )
end

#detect(buffers) ⇒ Events::Event, NilClass

Parameters:

Returns:

  • (Events::Event)

    if event is detected

  • (NilClass)

    if event is NOT detected



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# File 'lib/fusuma/plugin/detectors/swipe_detector.rb', line 19

def detect(buffers)
  gesture_buffer = buffers.find { |b| b.type == BUFFER_TYPE }
                          .select_from_last_begin
                          .select_by_events { |e| e.record.gesture == GESTURE_RECORD_TYPE }

  updating_events = gesture_buffer.updating_events
  return if updating_events.empty?

  oneshot_move_x, oneshot_move_y = if updating_events.size >= 10
                                     updating_time = 100 * (updating_events[-1].time - updating_events[-10].time)
                                     last_10 = gesture_buffer.class.new(updating_events[-10..-1])
                                     [last_10.sum_attrs(:move_x) / updating_time,
                                      last_10.sum_attrs(:move_y) / updating_time]
                                   else
                                     updating_time = 100 * (updating_events.last.time - updating_events.first.time)
                                     [gesture_buffer.sum_attrs(:move_x) / updating_time,
                                      gesture_buffer.sum_attrs(:move_y) / updating_time]
                                   end
  gesture_buffer.sum_attrs(:move_x) / updating_time

  finger = gesture_buffer.finger
  status = case gesture_buffer.events.last.record.status
           when 'end'
             'end'
           when 'update'
             if updating_events.length == 1
               'begin'
             else
               'update'
             end
           else
             gesture_buffer.events.last.record.status
           end

  delta = if status == 'end'
            gesture_buffer.events[-2].record.delta
          else
            gesture_buffer.events.last.record.delta
          end

  repeat_direction = Direction.new(move_x: delta.move_x, move_y: delta.move_y).to_s
  repeat_quantity = Quantity.new(move_x: delta.move_x, move_y: delta.move_y).to_f

  repeat_index = create_repeat_index(gesture: type, finger: finger,
                                     direction: repeat_direction, status: status)

  if status == 'update'
    return unless moved?(repeat_quantity)

    oneshot_direction = Direction.new(move_x: oneshot_move_x, move_y: oneshot_move_y).to_s
    oneshot_quantity = Quantity.new(move_x: oneshot_move_x, move_y: oneshot_move_y).to_f
    oneshot_index = create_oneshot_index(gesture: type, finger: finger,
                                         direction: oneshot_direction)
    if enough_oneshot_threshold?(index: oneshot_index, quantity: oneshot_quantity)
      return [
        create_event(record: Events::Records::IndexRecord.new(
          index: oneshot_index, trigger: :oneshot, args: delta.to_h
        )),
        create_event(record: Events::Records::IndexRecord.new(
          index: repeat_index, trigger: :repeat, args: delta.to_h
        ))
      ]
    end
  end
  create_event(record: Events::Records::IndexRecord.new(
    index: repeat_index, trigger: :repeat, args: delta.to_h
  ))
end