class Tk::Variable

This class is used for communication of variables with Tcl.

Attributes

bytesize[R]
name[R]
tcl_name[R]

Public Class Methods

new(name, value = None) click to toggle source
# File lib/ffi-tk/variable.rb, line 9
def initialize(name, value = None)
  @name = name.freeze
  @tcl_name = "$#{name}"
  set(value) unless None == value
end

Public Instance Methods

<=>(other) click to toggle source
# File lib/ffi-tk/variable.rb, line 59
def <=>(other)
  case other
  when self.class
    get <=> other.get
  else
    get <=> other
  end
end
get() click to toggle source
# File lib/ffi-tk/variable.rb, line 15
def get
  Tk.execute('set', name)
rescue RuntimeError
  raise NameError, "can't read %p: no such variable" % [name]
end
set(value) click to toggle source
# File lib/ffi-tk/variable.rb, line 21
def set(value)
  Tk.execute_only('set', name, value)
end
to_boolean() click to toggle source
# File lib/ffi-tk/variable.rb, line 41
def to_boolean
  got = get

  if got.respond_to?(:to_boolean)
    got.to_boolean
  elsif got == '0'
    false
  elsif got == '1'
    true
  else
    got
  end
end
to_f() click to toggle source
# File lib/ffi-tk/variable.rb, line 55
def to_f
  get.to_f
end
to_i() click to toggle source
# File lib/ffi-tk/variable.rb, line 37
def to_i
  get.to_i
end
to_s() click to toggle source
# File lib/ffi-tk/variable.rb, line 33
def to_s
  get.to_s
end
to_tcl() click to toggle source
# File lib/ffi-tk/variable.rb, line 29
def to_tcl
  TclString.new(name)
end
unset() click to toggle source
# File lib/ffi-tk/variable.rb, line 25
def unset
  Tk.execute_only('unset', name)
end