Class: Rabbit::Gesture::Handler

Inherits:
Object
  • Object
show all
Defined in:
lib/rabbit/gesture/handler.rb

Constant Summary collapse

DEFAULT_BACK_COLOR = 
Renderer::Color.parse("#3333337f")
DEFAULT_LINE_COLOR = 
Renderer::Color.parse("#f00f")
DEFAULT_NEXT_COLOR = 
Renderer::Color.parse("#0f0c")
DEFAULT_CURRENT_COLOR = 
Renderer::Color.parse("#f0fc")
DEFAULT_LINE_WIDTH = 
3
DEFAULT_NEXT_WIDTH = 
10

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(conf = {}) ⇒ Handler

Returns a new instance of Handler.



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# File 'lib/rabbit/gesture/handler.rb', line 20

def initialize(conf={})
  super()
  conf ||= {}
  @back_color = conf[:back_color] || DEFAULT_BACK_COLOR
  @line_color = conf[:line_color] || DEFAULT_LINE_COLOR
  @next_color = conf[:next_color] || DEFAULT_NEXT_COLOR
  @current_color = conf[:current_color] || DEFAULT_CURRENT_COLOR
  @line_width = conf[:line_width] || DEFAULT_LINE_WIDTH
  @next_width = conf[:next_width] || DEFAULT_NEXT_WIDTH
  @processor = Processor.new(conf[:threshold],
                             conf[:skew_threshold_angle])
  @actions = []
  @locus = []
end

Instance Attribute Details

#back_color ⇒ Object

Returns the value of attribute back_color.



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# File 'lib/rabbit/gesture/handler.rb', line 18

def back_color
  @back_color
end

#current_color ⇒ Object

Returns the value of attribute current_color.



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# File 'lib/rabbit/gesture/handler.rb', line 18

def current_color
  @current_color
end

#line_color ⇒ Object

Returns the value of attribute line_color.



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# File 'lib/rabbit/gesture/handler.rb', line 18

def line_color
  @line_color
end

#line_width ⇒ Object

Returns the value of attribute line_width.



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# File 'lib/rabbit/gesture/handler.rb', line 19

def line_width
  @line_width
end

#next_color ⇒ Object

Returns the value of attribute next_color.



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# File 'lib/rabbit/gesture/handler.rb', line 18

def next_color
  @next_color
end

#next_width ⇒ Object

Returns the value of attribute next_width.



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# File 'lib/rabbit/gesture/handler.rb', line 19

def next_width
  @next_width
end

Instance Method Details

#add_action(sequence, action, &block) ⇒ Object

Raises:



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# File 'lib/rabbit/gesture/handler.rb', line 43

def add_action(sequence, action, &block)
  invalid_motion = sequence.find do |motion|
    not @processor.available_motion?(motion)
  end
  raise InvalidMotionError.new(invalid_motion) if invalid_motion
  @actions << [sequence, action, block]
end

#button_motion(x, y, width, height) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 63

def button_motion(x, y, width, height)
  new_x = @base_x + x
  new_y = @base_y + y
  @locus << [new_x, new_y]
  @processor.update_position(new_x, new_y)
end

#button_release(x, y, width, height) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 59

def button_release(x, y, width, height)
  perform_action
end

#clear_actions ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 39

def clear_actions
  @actions.clear
end

#draw(renderer) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 79

def draw(renderer)
  if @back_color.alpha == 1.0 or
      (@back_color.alpha < 1.0 and renderer.alpha_available?)
    args = [true, 0, 0, renderer.width, renderer.height]
    args << @back_color
    renderer.draw_rectangle(*args)
  end

  draw_available_marks(renderer, next_available_motions)

  act, = action
  draw_mark(renderer, act, *@processor.position) if act

  draw_locus(renderer)
end

#draw_last_locus(renderer) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 70

def draw_last_locus(renderer)
  if @locus.size >= 2
    x1, y1 = @locus[-2]
    x2, y2 = @locus[-1]
    args = [x1, y1, x2, y2, @line_color, {:line_width => @line_width}]
    renderer.draw_line(*args)
  end
end

#draw_locus(renderer) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 95

def draw_locus(renderer)
  return if @locus.empty?
  renderer.draw_lines(@locus, @line_color, {:line_width => @line_width})
end

#moved? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/gesture/handler.rb', line 100

def moved?
  @locus.size >= 2
end

#processing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/gesture/handler.rb', line 35

def processing?
  @processor.started?
end

#start(button, x, y, base_x, base_y) ⇒ Object 



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# File 'lib/rabbit/gesture/handler.rb', line 51

def start(button, x, y, base_x, base_y)
  @button = button
  @processor.start(x, y)
  @base_x = base_x
  @base_y = base_y
  @locus = [[x, y]]
end