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_THRESHOLD = 
25

Instance Attribute Summary

Attributes inherited from Detector

#tag, #type

Instance Method Summary collapse

Methods inherited from Detector

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

Methods inherited from Base

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

Constructor Details

This class inherits a constructor from Fusuma::Plugin::Detectors::Detector

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 100

def create_oneshot_index(gesture:, finger:, direction:)
  Config::Index.new(
    [
      Config::Index::Key.new(gesture),
      Config::Index::Key.new(finger.to_i),
      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 85

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_type(GESTURE_RECORD_TYPE)

  updating_events = gesture_buffer.updating_events
  return if updating_events.empty?

  updating_time = 100 * (updating_events.last.time -
                         (updating_events[-10] || updating_events.first).time)
  oneshot_move_x = gesture_buffer.sum_last10_attrs(:move_x) / updating_time
  oneshot_move_y = gesture_buffer.sum_last10_attrs(:move_y) / 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