Class: Wx::Menu

Inherits:
Object
  • Object
show all
Defined in:
lib/wx/classes/menu.rb

Overview

A single labelled list within a drop-down menu, or a popup menu

Class Method Summary collapse

Class Method Details

.methods_with_optional_ids(*meth_names) ⇒ Object

In the standard WxWidgets API, the methods append, prepend, insert (and their variants) require a constant integer id as the identifier of the menu item. This is then used in event handling.

In WxRuby the use of explicit ids can be avoided in most cases, being a most unruby-ish practice. So, by analogy with the general use of Wx::Window classes and event handlers, where the id is implicit in the constructor, and the window can be passed direct to the event handler setup method, the below sets up a similar facility for adding items to Wx::Menu.

For all these methods, the only required argument is the string name of the menu item; a system-default id will be supplied if no explicit one is given. The return value of these methods in all cases is a Wx::MenuItem object, which can be passed directly as the first argument to an evt_menu handler.



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# File 'lib/wx/classes/menu.rb', line 20

def self.methods_with_optional_ids(*meth_names)
  class_eval do 
    meth_names.each do | meth |
      old_meth = instance_method(meth)
      define_method(meth) do | *args |
        case args.first
          when Fixnum then old_meth.bind(self).call(*args)
          when String then old_meth.bind(self).call(Wx::ID_ANY, *args)
          when Wx::MenuItem then old_meth.bind(self).call(args.first)
        end
      end
    end
  end
end

.methods_with_optional_ids_and_pos(*meth_names) ⇒ Object

This is much the same as above, except for insert and variants, which take an additional first argument, the position at which to insert the new item.



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# File 'lib/wx/classes/menu.rb', line 43

def self.methods_with_optional_ids_and_pos(*meth_names)
  class_eval do 
    meth_names.each do | meth |
      old_meth = instance_method(meth)
      define_method(meth) do | pos, *args |
        case args.first
          when Fixnum then old_meth.bind(self).call(pos, *args)
          when String then old_meth.bind(self).call(pos, Wx::ID_ANY, *args)
          when Wx::MenuItem then old_meth.bind(self).call(pos, args.first)
        end
      end
    end
  end
end