Class: AuthorEngine::TouchButton

Inherits:
Object
  • Object
show all
Defined in:
lib/author_engine/game/opal/touch_button.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(label:, color:, x:, y: nil, width:, height:, side:, for_key: nil, &block) ⇒ TouchButton

Returns a new instance of TouchButton.



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# File 'lib/author_engine/game/opal/touch_button.rb', line 4

def initialize(label:, color:, x:, y: nil, width:, height:, side:, for_key: nil, &block)
  @label, @color, @x, @y, @width, @height = label, color, x, y, width, height
  @side, @for_key = side, for_key
  @block = block

  @buttons    = AuthorEngine::Part::OpalInput::BUTTONS
  @key_states = AuthorEngine::Part::OpalInput::KEY_STATES

  @game       = AuthorEngine::GameRunner.instance.game
  @game_width = 128 * @game.authorengine_scale
  @game_x     = `window.innerWidth/2 - #{@game_width/2}`

  if @side == :left
    @x = @game_x-@x
  elsif @side == :right
    @x = @game_x+@game_width+@x
  else
    raise "side must be :left or :right"
  end

  @y = `window.innerHeight/2 - #{height/2}` unless @y.is_a?(Numeric)
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/author_engine/game/opal/touch_button.rb', line 3

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/author_engine/game/opal/touch_button.rb', line 3

def width
  @width
end

#x ⇒ Object (readonly)

Returns the value of attribute x.



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# File 'lib/author_engine/game/opal/touch_button.rb', line 3

def x
  @x
end

#y ⇒ Object (readonly)

Returns the value of attribute y.



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# File 'lib/author_engine/game/opal/touch_button.rb', line 3

def y
  @y
end

Instance Method Details

#active ⇒ Object 



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# File 'lib/author_engine/game/opal/touch_button.rb', line 58

def active
  @key_states[@buttons[@for_key]] = true
end

#draw ⇒ Object 



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# File 'lib/author_engine/game/opal/touch_button.rb', line 27

def draw
  `#{@game.authorengine_canvas_context}.fillStyle = #{@color}`
  `#{@game.authorengine_canvas_context}.fillRect(#{@x}, #{@y}, #{@width}, #{@height})`

  font = "#{@height}px Connection, Consolas"
  `#{@game.authorengine_canvas_context}.font = #{font}`
  `#{@game.authorengine_canvas_context}.fillStyle = "white"`
  `#{@game.authorengine_canvas_context}.textBaseline = "top"`
  `#{@game.authorengine_canvas_context}.fillText(#{@label}, #{@x}, #{@y}, #{@width})`
end

#inactive ⇒ Object 



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# File 'lib/author_engine/game/opal/touch_button.rb', line 62

def inactive
  @key_states[@buttons[@for_key]] = false
end

#trigger?(touches) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/author_engine/game/opal/touch_button.rb', line 38

def trigger?(touches)
  triggered = false

  touches.detect do |id, touch|
    if touch.x.between?(@x, @x+@width) && touch.y.between?(@y, @y+@height)
      triggered = true
    end
  end


  if @for_key
    active if triggered
    inactive unless triggered
  else
    @block.call if @block && triggered
  end

  return triggered
end