Class: Device::Display

Inherits:
Object
  • Object
show all
Defined in:
lib/device/display.rb

Constant Summary collapse

MAIN_BMP = 
"main.bmp"

Class Method Summary collapse

Class Method Details

.adapter ⇒ Object 



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# File 'lib/device/display.rb', line 5

def self.adapter
  Device.adapter::Display
end

.clear(line = nil) ⇒ Object

Clean display

Parameters:

  • line (Fixnum) (defaults to: nil) —

    Line to clear



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# File 'lib/device/display.rb', line 41

def self.clear(line = nil)
  if line.nil?
    STDOUT.fresh
    adapter.clear
  else
    adapter.clear_line line
  end
end

.main_image ⇒ Object 



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# File 'lib/device/display.rb', line 70

def self.main_image
  if adapter.respond_to?(:main_image) &&
    File.exists?("./shared/#{adapter.main_image}")
    adapter.main_image
  else
    MAIN_BMP
  end
end

.print(buf, row = nil, column = nil) ⇒ NilClass

Display buffer

Parameters:

  • buf (String) —

    Text to be printed.

  • row (Fixnum) (defaults to: nil) —

    Row to start display.

  • column (Fixnum) (defaults to: nil) —

    Column to start display.

Returns:

  • (NilClass) —

    nil.



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# File 'lib/device/display.rb', line 15

def self.print(buf, row = nil, column = nil)
  if row.nil? && column.nil?
    STDOUT.print(buf)
  else
    adapter.print_in_line(buf, row, column)
  end
end

.print_bitmap(path, row = 0, column = 0) ⇒ NilClass

Display bitmap

Parameters:

  • path (String) —

    path

  • row (Fixnum) (defaults to: 0) —

    Row to start display.

  • column (Fixnum) (defaults to: 0) —

    Column to start display.

Returns:

  • (NilClass) —

    nil.

Raises:

  • (File::FileError) 


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# File 'lib/device/display.rb', line 33

def self.print_bitmap(path, row = 0, column = 0)
  raise(File::FileError, path) unless File.exists?(path)
  adapter.display_bitmap(path, row, column)
end

.print_line(buf, row = 0, column = 0) ⇒ Object 



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# File 'lib/device/display.rb', line 23

def self.print_line(buf, row = 0, column = 0)
  self.print(buf, row, column)
end

.print_main_image ⇒ Object 



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# File 'lib/device/display.rb', line 65

def self.print_main_image
  bmp = "./shared/#{self.main_image}"
  self.print_bitmap(bmp,0,0) if File.exists?(bmp)
end

.print_status_bar(slot, image_path) ⇒ NilClass, TrueClass

Print image in slot of status bar

Parameters:

  • slot (Fixnum) —

    Status bar slot.

  • image_path (String) —

    Path to image, or send nil to clear the slot.

Returns:

  • (NilClass) —

    Failure.

  • (TrueClass) —

    Success.



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# File 'lib/device/display.rb', line 56

def self.print_status_bar(slot, image_path)
  slots = self.adapter.status_bar_slots_available - 1
  if (0..slots).include?(slot)
    if image_path.nil? || File.exists?(image_path)
      self.adapter.print_status_bar(slot, image_path)
    end
  end
end