Class: VER::Status::Battery

Inherits:
Tk::Canvas
  • Object
show all
Defined in:
lib/ver/status/battery.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(status, options = {}) ⇒ Battery

Returns a new instance of Battery.



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# File 'lib/ver/status/battery.rb', line 6

def initialize(status, options = {})
  @status = status
  @weight = options.delete(:weight) || 0
  @format = options.delete(:format) || '[%b] %p% %t'
  @row = options.delete(:row)
  @column = options.delete(:column)
  @sticky = options.delete(:sticky)
  super

  @width, @height = cget(:width), cget(:height)

  draw_battery
  draw_text

  percent, string = Battery.update(format)
  show(percent / 100.0, string)

  @show_block = VER.when_inactive_for(5000){
    percent, string = Battery.update(format)
    show(percent / 100.0, string)
  }

  tk_parent.bind '<Destroy>' do |event|
    VER.cancel_block(@show_block)
  end
end

Instance Attribute Details

#column ⇒ Object (readonly)

Returns the value of attribute column.



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# File 'lib/ver/status/battery.rb', line 4

def column
  @column
end

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/ver/status/battery.rb', line 4

def format
  @format
end

#row ⇒ Object (readonly)

Returns the value of attribute row.



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# File 'lib/ver/status/battery.rb', line 4

def row
  @row
end

#status ⇒ Object (readonly)

Returns the value of attribute status.



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# File 'lib/ver/status/battery.rb', line 4

def status
  @status
end

#sticky ⇒ Object (readonly)

Returns the value of attribute sticky.



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# File 'lib/ver/status/battery.rb', line 4

def sticky
  @sticky
end

#weight ⇒ Object (readonly)

Returns the value of attribute weight.



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# File 'lib/ver/status/battery.rb', line 4

def weight
  @weight
end

Class Method Details

.battery_build(format) ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 86

def self.battery_build(format)
  total = {}

  Dir.glob('/proc/acpi/battery/*/{state,info}') do |file|
    parsed = battery_parse(file)
    next unless parsed[:present] == 'yes'
    # FIXME: doesn't take care of multiple batteries
    total.merge!(parsed)
  end

  # rate might be 0
  rate = total[:present_rate].to_i
  capacity = total[:remaining_capacity].to_i

  if rate == 0
    hours, percent = 2, 100
    time = hours_left = minutes_left = 'N/A'
  else
    hours, minutes = ((capacity * 60.0) / rate).divmod(60)
    minutes = minutes.round
    percent = ((100 / total[:last_full_capacity].to_f) * capacity).round
    hours_left = (hours + (minutes / 60.0)).round
    minutes_left = (hours / 60.0) + minutes
    time = "#{hours}:#{minutes}"
  end

  case total[:charging_state]
  when 'discharging'
    b = hours < 1 ? '!' : '-'
  when 'charging'
    b = '+'
  end

  final = {
    '%c' => capacity,
    '%r' => rate,
    '%b' => b,
    '%p' => percent,
    '%m' => minutes_left,
    '%h' => hours_left,
    '%t' => time,
  }

  @last = Time.now
  return percent, format.gsub(/%\w/, final)
end

.battery_parse(file) ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 133

def self.battery_parse(file)
  data = {}

  File.open(file) do |io|
    io.each_line do |line|
      next unless line =~ /^([^:]+):\s*(.+)$/
      data[$1.downcase.tr(' ', '_').to_sym] = $2
    end
  end

  data
end

.update(format) ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 67

def self.update(format)
  now = Time.now

  if @battery_last
    if @battery_last < (now - 60)
      @battery_last = now
      @battery_value = battery_build(format)
    else
      @battery_value
    end
  else
    @battery_last = now
    @battery_value = battery_build(format)
  end
rescue => ex
  VER.error(ex)
  ex.message
end

Instance Method Details

#draw_battery ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 37

def draw_battery
  # yay for scalable vector graphics
  @battery = create_polygon(
    0, 0,
    0, @height,
    @width * 0.95, @height,
    @width * 0.95, @height * 0.8,
    @width, @height * 0.8,
    @width, @height * 0.2,
    @width * 0.95, @height * 0.2,
    @width * 0.95, 0
  )
end

#draw_text ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 51

def draw_text
  @label = create_text(
    @width * 0.5,
    @height * 0.5,
    font: status.text.options[:font],
    anchor: 'center'
  )
end

#show(percent, string) ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 60

def show(percent, string)
  r, g, b = 0xffff - (0xffff * percent), (0xffff * percent), 0
  color = '#%04x%04x%04x' % [r, g, b]
  @battery.configure fill: color
  @label.configure text: string
end

#style=(config) ⇒ Object 



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# File 'lib/ver/status/battery.rb', line 33

def style=(config)
  configure(background: config[:background])
end