Class: Demos::Forum::MusicBlock

Inherits:
Hokusai::Block show all
Defined in:
ui/examples/forum/music.rb

Instance Attribute Summary collapse

Attributes inherited from Hokusai::Block

#node, #provides, #publisher

Instance Method Summary collapse

Methods inherited from Hokusai::Block

#children, #children?, compile, computed, computed!, #draw, #draw_with, #dump, #emit, inject, inject!, #method_missing, mount, #on_resize, provide, provides, style, styles_get, template, template_from_file, template_get, #update, use, uses

Constructor Details

#initialize(**args) ⇒ MusicBlock

Returns a new instance of MusicBlock.



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# File 'ui/examples/forum/music.rb', line 18

def initialize(**args)
  super
  @started = false
  @duration = 300
  @head = 0
  @ticks = 0
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Hokusai::Block

Instance Attribute Details

#duration ⇒ Object

Returns the value of attribute duration.



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# File 'ui/examples/forum/music.rb', line 16

def duration
  @duration
end

#head ⇒ Object

Returns the value of attribute head.



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# File 'ui/examples/forum/music.rb', line 16

def head
  @head
end

#started ⇒ Object

Returns the value of attribute started.



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# File 'ui/examples/forum/music.rb', line 16

def started
  @started
end

#ticks ⇒ Object

Returns the value of attribute ticks.



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# File 'ui/examples/forum/music.rb', line 16

def ticks
  @ticks
end

Instance Method Details

#control ⇒ Object 



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# File 'ui/examples/forum/music.rb', line 30

def control
  started ? "#{__dir__}/../assets/icons/media-playback-pause.png" : "#{__dir__}/../assets/icons/media-playback-start.png"
end

#render(canvas) ⇒ Object 



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# File 'ui/examples/forum/music.rb', line 34

def render(canvas)
  if started
    if self.ticks >= 60
      self.head += 1
      self.ticks = 0
    end

    if head >= duration
      self.started = false
      self.head = 0
      self.ticks = 0
    end

    self.ticks += 1
  end

  draw do
    start = canvas.x + 20
    canvas.y += 6.0
    padding = 4.0

    # draw controls
    image(control, canvas.x, canvas.y, 15.0, 15.0)

    # draw line
    rect(start, canvas.y + 3.0 + padding, canvas.width, 2.0) do |command|
      command.color = Hokusai::Color.new(244,244,244)
    end

    # draw the playhead
    ix = head * canvas.width / duration
    rect(start + ix, canvas.y + padding, 2.0, 10.0) do |command|
      command.color = Hokusai::Color.new(244,244,244)
    end


    yield canvas
  end
end

#update_player(event) ⇒ Object 



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# File 'ui/examples/forum/music.rb', line 26

def update_player(event)
  self.started = true
end