Class: Alexandria::UI::BarcodeAnimation

Inherits:
Object
  • Object
show all
Defined in:
lib/alexandria/ui/barcode_animation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BarcodeAnimation

Returns a new instance of BarcodeAnimation.



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# File 'lib/alexandria/ui/barcode_animation.rb', line 55

def initialize
  @canvas = GooCanvas::Canvas.new
  @canvas.set_size_request(300, 70)
  @canvas.set_bounds(0, 0, 350, 70)
  @root = @canvas.root_item

  @barcode_bars = []
  @barcode_data = []

  @hpos = 0

  @scale = 3
  @bar_left_edge = 0
  @bar_top = 8
  @bar_height = 50

  create_ean_barcode_data
  draw_barcode_bars

  @timeout = nil
  @index = 0
  @fade_opacity = 255
  set_active
  @canvas.show
end

Instance Attribute Details

#canvas ⇒ Object (readonly)

Returns the value of attribute canvas.



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# File 'lib/alexandria/ui/barcode_animation.rb', line 53

def canvas
  @canvas
end

Instance Method Details

#destroy ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 88

def destroy
  @canvas.destroy
  @canvas = nil
end

#manual_input ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 106

def manual_input
  # TODO: distinguish between scanner and manual input
  # @canvas.set_property(:background_color, "#FFF8C0")
end

#scanner_input ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 111

def scanner_input
  # TODO: distinguish between scanner and manual input
  # @canvas.set_property(:background_color, "white")
end

#set_active ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 93

def set_active
  @canvas.set_property(:background_color, "white")
  @barcode_bars.each { |rect| rect.set_property(:fill_color, "white") }
end

#set_passive ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 98

def set_passive
  @canvas or return

  passive_bg = "#F4F4F4"
  @canvas.set_property(:background_color, passive_bg)
  @barcode_bars.each { |rect| rect.set_property(:fill_color, passive_bg) }
end

#start ⇒ Object 



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# File 'lib/alexandria/ui/barcode_animation.rb', line 81

def start
  @timeout = GLib::Timeout.add(20) do
    scan_animation
    (@index >= 0)
  end
end