Class: Artoo::Drivers::Joystick

Inherits:
Driver
  • Object
show all
Includes:
Utility
Defined in:
lib/artoo/drivers/joystick.rb

Overview

The sdl-joystick driver behaviors

Direct Known Subclasses

Ps3, Xbox360

Constant Summary collapse

COMMANDS = 
[:currently_pressed?].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#button_values ⇒ Object (readonly)

Returns the value of attribute button_values.



11
12
13
 
# File 'lib/artoo/drivers/joystick.rb', line 11

def button_values
  @button_values
end

Instance Method Details

#currently_pressed?(b) ⇒ Boolean

Returns:

  • (Boolean) 


40
41
42
 
# File 'lib/artoo/drivers/joystick.rb', line 40

def currently_pressed?(b)
  button_values[b]
end

#handle_buttons ⇒ Object 



71
72
73
74
75
76
77
78
79
 
# File 'lib/artoo/drivers/joystick.rb', line 71

def handle_buttons
  connection.num_buttons.times {|b|
    currently_pressed = connection.button(b)
    if button_values[b] != currently_pressed
      button_values[b] = currently_pressed
      publish_button(b)
    end
  }
end

#handle_joystick ⇒ Object 



52
53
54
55
56
57
58
59
60
 
# File 'lib/artoo/drivers/joystick.rb', line 52

def handle_joystick
  number_sticks = connection.num_axes / 2
  number_sticks.times {|s|
    x = connection.axis(s * 2)
    y = connection.axis(s * 2 + 1)

    publish_joystick(s, x, y)
  }
end

#handle_message_events ⇒ Object 



44
45
46
47
48
49
50
 
# File 'lib/artoo/drivers/joystick.rb', line 44

def handle_message_events
  connection.poll
  handle_joystick
  # TODO: handle_trackball
  # TODO: handle_hats
  handle_buttons
end

#handle_trackball ⇒ Object 



62
63
64
65
66
67
68
69
 
# File 'lib/artoo/drivers/joystick.rb', line 62

def handle_trackball
  if connection.num_balls == 1
    x, y = connection.ball(0)

    publish(event_topic_name("update"), "trackball", {:x => x, :y => y})
    publish(event_topic_name("trackball"), {:x => x, :y => y})
  end
end

#publish_button(b) ⇒ Object 



87
88
89
90
91
92
93
 
# File 'lib/artoo/drivers/joystick.rb', line 87

def publish_button(b)
  if button_values[b] == 1
    publish(event_topic_name("update"), "button", b)
    publish(event_topic_name("button"), b)
    publish(event_topic_name("button_#{b}"))
  end
end

#publish_joystick(s, x, y) ⇒ Object 



81
82
83
84
85
 
# File 'lib/artoo/drivers/joystick.rb', line 81

def publish_joystick(s, x, y)
  publish(event_topic_name("update"), "joystick", {:x => x, :y => y, :s => s})
  publish(event_topic_name("joystick"), {:x => x, :y => y, :s => s})
  publish(event_topic_name("joystick_#{s}"), {:x => x, :y => y})
end

#start_driver ⇒ Object

Start driver and any required connections



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/artoo/drivers/joystick.rb', line 14

def start_driver
  puts os
  case os
  when :linux
    require 'artoo/drivers/linux_binding_map'
  when :macosx
    require 'artoo/drivers/macosx_binding_map'
  else
    # raise error ?
  end

  @button_values = {}

  begin
    every(interval) do
      handle_message_events
    end

    super
  rescue Exception => e
    Logger.error "Error starting SdlJoystick driver!"
    Logger.error e.message
    Logger.error e.backtrace.inspect
  end
end