[wxruby-users] Preloading the wx libraries

[Alex Fenton]

Hi

Mario Steele wrote:
> *mouth drops*  I never knew wxRuby was being used, or could even be 
> used on something like that little thing.  
Likewise ... cool

> The problem with that, is you need to initialize Wx::App only once.  
> Any attempt to use Wx::App more then once, will cause the error your 
> getting.  
Generally, this is part of the design of the Wx library, not just wxRuby 
- it expects the main_loop to be entered only once, as part of the 
library is initialised at this point rather than at library load.
> You could possibly setup a Client/Server system, in which you create a 
> dummy library, that replicates the functionality of wxRuby, which 
> actually communicates to the Server, to create the windows, and such.  
> That would be the only way you would be able to "Pre Load" the wxRuby 
> library.
I looked into this approach a while back when I was trying to create an 
interactive wxRuby shell which could be used to test out ideas quickly. 
I never got it into a fully functional state, but here's the code in 
case it helps you. It creates a server app upon which a client can 
execute wx code.

alex

##### CLIENT #####

require 'socket'
include Socket::Constants


while command = gets
  if command.chomp == "x"
    
    exit!
  end
  p 'command'
  socket = Socket.new( AF_INET, SOCK_STREAM, 0 )
  sockaddr = Socket.pack_sockaddr_in( 5858, '127.0.0.1' )
  socket.connect( sockaddr )
  socket.write( command )
  result = socket.readline
  STDOUT.puts ">> #{result}"
  socket.close
end
# results = socket.read

##### SERVER #####

require 'wx'

require 'socket'

class IRBApp < Wx::App
  def on_init

    server = TCPServer.new('127.0.0.1', 5858)

    $f = Wx::Frame.new(nil, -1, 'empty')
    # $f.show
    Wx::Timer.every(100) { Thread.pass }

    listener = Thread.new do
      while session = server.accept
        command = session.gets
        p command
        begin
          result = eval( command )
        rescue => result
        end
        session.puts(result.inspect)
        session.close
      end
    end
    listener.abort_on_exception = true
  end
end


IRBApp.new().main_loop