wxruby users - Jan 2007 - grid control example doesn''t work on osx.4

Hi,
I am trying to use wxruby2-preview (0.0.38) on my intel macbook  
running os10.4.8.  I am having a beast of a time running the examples  
in the tutorials.  The super basic frame example worked but the  
simple grid tutorial bombs with the following message:
------
[WhiteGhost:~/tmp/wxStff] hjw$ ruby ./grid.rb

/usr/local/lib/ruby/gems/1.8/gems/wxruby2-preview-0.0.38-i686- 
darwin8.4.1/lib/wx/classes/app.rb:10: warning: method redefined;  
discarding old on_assert
./grid.rb:10: [BUG] Bus Error
ruby 1.8.4 (2005-12-24) [i686-darwin8.8.3]

Abort trap
---------------

The code is below, line 10 is the call to tgrid = Wx::Grid.new(frame,  
-1), what the heck am I missing? The bigdemo works (although it  
usually crashes after I''ve run a three or four of the demos) so I  
think that everything''s installed properly on my system. I copied the  
code below from the tutorial----------

#!/usr/bin/env ruby -w

require ''rubygems''
require ''wx''

app = Wx::App.new
frame = Wx::Frame.new( nil , -1 , "MiniApp" )
#grid = Wx::Grid.new( frame , 2000, Wx::DEFAULT_POSITION,  
Wx::DEFAULT_SIZE, Wx::WANTS_CHARS,"this the panel name" )
tgrid = Wx::Grid.new(frame, -1)
tgrid.create_grid( 19 , 16 )
frame.show()
app.main_loop()

---------

Any help would be appreciated I have to get a little utility running  
on my mac and a windows machine before the 18th.

Sincerely,
Hawley

Hi Hawley
> I am trying to use wxruby2-preview (0.0.38) on my intel macbook  
> running os10.4.8.  I am having a beast of a time running the examples  
> in the tutorials.  
Apologies, it appears no-one has reviewed the code in the wiki tutorials 
for some time, and they have got out of date. Suggest you refer to the 
samples supplied with wxruby2-preview in preference.
> The code is below, line 10 is the call to tgrid = Wx::Grid.new(frame,  
> -1), what the heck am I missing? 
The tutorial and the example you give are trying to create widgets 
(Frames, Grids) outside of the on_init loop of you App. This will 
definitely cause the kind of problems you''re seeing. Try structuring 
your code like this:

require ''wx''

class GridApp < Wx::App
  def on_init
    frame = Wx::Frame.new(nil, -1, "Grid wxRuby App")
    grid  = Wx::Grid.new(frame, -1)
    grid.create_grid(5, 5)
    frame.show()
  end
end

GridApp.new.main_loop
> Any help would be appreciated I have to get a little utility running  
> on my mac and a windows machine before the 18th.
>   
Thanks for trying wxruby - but to be honest, if you''re up against a 
deadline right now I''d suggest using Tk or Fox whose ruby bindings are 
more mature.

good luck
alex

Hawley,

Try using this version, you need to subclass Wx::App:

#!/usr/bin/env ruby -w

require ''rubygems''
require ''wx''

class MyApp < Wx::App
  def on_init
    frame = Wx::Frame.new( nil , -1 , "MiniApp" )
    tgrid = Wx::Grid.new(frame, -1)
    tgrid.create_grid( 19 , 16 )
    frame.show()
  end
end

MyApp.new().main_loop()

This works on intel iMac

Sean

On 1/3/07, Hawley Waldman <hawleyw at gmail.com>
wrote:
> Hi,
> I am trying to use wxruby2-preview (0.0.38) on my intel macbook
> running os10.4.8.  I am having a beast of a time running the examples
> in the tutorials.  The super basic frame example worked but the
> simple grid tutorial bombs with the following message:
> ------
> [WhiteGhost:~/tmp/wxStff] hjw$ ruby ./grid.rb
>
> /usr/local/lib/ruby/gems/1.8/gems/wxruby2-preview-0.0.38-i686-
> darwin8.4.1/lib/wx/classes/app.rb:10: warning: method redefined;
> discarding old on_assert
> ./grid.rb:10: [BUG] Bus Error
> ruby 1.8.4 (2005-12-24) [i686-darwin8.8.3]
>
> Abort trap
> ---------------
>
> The code is below, line 10 is the call to tgrid = Wx::Grid.new(frame,
> -1), what the heck am I missing? The bigdemo works (although it
> usually crashes after I''ve run a three or four of the demos) so I
> think that everything''s installed properly on my system. I copied
the
> code below from the tutorial----------
>
> #!/usr/bin/env ruby -w
>
> require ''rubygems''
> require ''wx''
>
> app = Wx::App.new
> frame = Wx::Frame.new( nil , -1 , "MiniApp" )
> #grid = Wx::Grid.new( frame , 2000, Wx::DEFAULT_POSITION,
> Wx::DEFAULT_SIZE, Wx::WANTS_CHARS,"this the panel name" )
> tgrid = Wx::Grid.new(frame, -1)
> tgrid.create_grid( 19 , 16 )
> frame.show()
> app.main_loop()
>
> ---------
>
> Any help would be appreciated I have to get a little utility running
> on my mac and a windows machine before the 18th.
>
> Sincerely,
> Hawley
>
>
> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>

Hi Alex,
Thanks for explaining the problem. Doing things from within on_init  
took care of the problem. The project that I''m using this for is just  
a small display type program(read hack) so, now that I understand why  
the simplest of things was bombing I can put in a few hours to get  
things working on my mac and then test it on a windows machine.  I''d  
like to be able to stick with wxRuby because of it''s use of native  
widgets.

thanks again,
Hawley
> Hi Hawley
>
>
>> I am trying to use wxruby2-preview (0.0.38) on my intel macbook
>> running os10.4.8.  I am having a beast of a time running the examples
>> in the tutorials.
>>
> Apologies, it appears no-one has reviewed the code in the wiki  
> tutorials
> for some time, and they have got out of date. Suggest you refer to the
> samples supplied with wxruby2-preview in preference.
>
>> The code is below, line 10 is the call to tgrid = Wx::Grid.new(frame,
>> -1), what the heck am I missing?
>>
> The tutorial and the example you give are trying to create widgets
> (Frames, Grids) outside of the on_init loop of you App. This will
> definitely cause the kind of problems you''re seeing. Try
structuring
> your code like this:
>
> require ''wx''
>
> class GridApp < Wx::App
>   def on_init
>     frame = Wx::Frame.new(nil, -1, "Grid wxRuby App")
>     grid  = Wx::Grid.new(frame, -1)
>     grid.create_grid(5, 5)
>     frame.show()
>   end
> end
>
> GridApp.new.main_loop