Class: RubyCurses::TabularWidget::Circular

Inherits:
Struct
  • Object
show all
Defined in:
lib/rbcurse/extras/tabularwidget.rb

Overview

a structure that maintains position and gives next and previous taking max index into account. it also circles. Can be used for traversing next component in a form, or container, or columns in a table.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(m, c = 0) ⇒ Circular

Returns a new instance of Circular.



1024
1025
1026
1027
1028
1029
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1024

def initialize  m, c=0
  raise "max index cannot be nil" unless m
  @max_index = m
  @current_index = c
  @last_index = c
end

Instance Attribute Details

#current_index ⇒ Object

Returns the value of attribute current_index

Returns:

  • (Object) —

    the current value of current_index



1021
1022
1023
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1021

def current_index
  @current_index
end

#last_index ⇒ Object (readonly)

Returns the value of attribute last_index.



1022
1023
1024
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1022

def last_index
  @last_index
end

Instance Method Details

#is_last? ⇒ Boolean

Returns:

  • (Boolean) 


1046
1047
1048
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1046

def is_last?
  @current_index == @max_index
end

#next ⇒ Object 



1030
1031
1032
1033
1034
1035
1036
1037
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1030

def next
  @last_index = @current_index
  if @current_index + 1 > @max_index
    @current_index = 0
  else
    @current_index += 1
  end
end

#previous ⇒ Object 



1038
1039
1040
1041
1042
1043
1044
1045
 
# File 'lib/rbcurse/extras/tabularwidget.rb', line 1038

def previous
  @last_index = @current_index
  if @current_index - 1 < 0
    @current_index = @max_index
  else
    @current_index -= 1
  end
end