[wxruby-users] DatePickerCtrl uninitialized constant

Mario Steele
Fri, 06 Nov 2009 07:40:47 -0000

Hello Svend,

2009/11/5 Svend Haugaard S?rensen <shs at demosophia.net>

> I trying to make a Dialog that include a DatePickerCtrl on my gentoo
> linux box.
>
> I get the following error
>
>
/usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:478:in
> `const_missing'': uninitialized constant
PortfolioDialog::DatePickerCtrl
> (NameError)
>
> My application use ActiveRecord, thats why the error is from
> activesupport.
>
> gem list says
> wxruby (1.9.9, 1.9.8)
>

1.9.8 and 1.9.9 are old versions, you should use 2.0.1, as it is the newest,
however the wxDatePickerCtrl is in 1.9.9 and 1.9.8.  The problem is, is that
ActiveSupport is trying to check for a Constant, that does not exist.  You
need to use Wx::DatePickerCtrl in order to make it work, unless you include
Wx in PortfolioDialog class.

EG:

class PortfolioDialog < Wx::Dialog
  def initialize
    super
    @dpc = Wx::DatePickerCtrl.new
  end
end

Or:

class PortfolioDialog < Wx::Dialog
  include Wx
  def initialize
    super
    @dpc = DatePickerCtrl.new
  end
end

Or

module Wx
  class PortfolioDialog < Dialog
    def initialize
      super
      @dpc = DatePickerCtrl.new
    end
  end
end

The last method I would not use, as that pollutes the Wx namespace.  But the
point being, that when you subclass from a wxRuby class, it does not
automatically inherit the Wx namespace.  You need to either explicitly
define it, include it, or define your class under the Wx namespace, in order
to avoid having to use the Wx namespace in pre-pending of class definitions.

hth,

Mario


> Should DatePickerCtrl work in this version?
>
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> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>



--
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
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