From: "Maximilian Bräutigam" <max-braeu@...>
Date: 2009-09-05T20:07:19+09:00
Subject: Filling Wx::ListCtrl with contents

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Hi all,

I've got a question concerning ListCtrl_virtual of wxRuby since I see no
way filling the list with dynamic contents. I'm new to Ruby so I maybe
have to apologise for my request.

The problem is, that I have to define the on_get_item_text(item, col)
function. There I would like to use the item and col variables to read
data from a two-dimensional array. My very problem is, that I do not
know how to transfer the array from another function to
on_get_item_text(item, col) or better on_get_item_text(item, col,
array). I attached a rubyscript showing what I mean.

I would be very grateful, if you could give me a solution of this
problem ��� maybe modify my testscript. 

And/Or please show me how to use the approach via ListItems because the
samplefile 
http://wxruby.rubyforge.org/doc/samplelistctrl.html
at the website 
http://wxruby.rubyforge.org/doc/listctrl.html
is not accessible. I tinkered with it but it doesn't really work.

Thank you very much in advance for your kind help.
Kind regards,
der Max
-- 
Maximilian Br��utigam
max-braeu@gmx.de
http://www.jcf.uni-jena.de/


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#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

begin
  require 'rubygems' 
rescue LoadError
end
begin
  require 'wx'
rescue LoadError
  puts "Error loading library/module: wx not found"
  exit 1
end

class MyFrame < Wx::Frame
  def initialize(title)

    super( nil, 
           :title => title, 
           :size => [ 800 , 600 ], 
           :style => Wx::DEFAULT_FRAME_STYLE 
           )

    menu_bar = Wx::MenuBar.new
    menu_file = Wx::Menu.new
    menu_file.append(Wx::ID_EXIT, "E&xit\tAlt-X", "Quit this program")
    menu_bar.append(menu_file, "&File")
    self.menu_bar = menu_bar

    @listctrl = Wx::ListCtrl.new( self , 
                                 :style => Wx::LC_REPORT|Wx::LC_VIRTUAL|Wx::LC_HRULES|Wx::LC_VRULES
                                 )
    @listctrl.insert_column(0, "key")
    @listctrl.insert_column(1, "description")
    @listctrl.insert_column(2, "creation time")
    @listctrl.insert_column(3, "last update")
    @listctrl.set_column_width(0, 80)
    @listctrl.set_column_width(1, 420)
    @listctrl.set_column_width(2, 150)
    @listctrl.set_column_width(3, 150)
    @listctrl.set_item_count(2)
    
    def @listctrl.on_get_item_text(item, col)
      # i want to do the following:
#      contentarray = get_contents()
#      contentarray = frame.get_contents()
#      contentarray = MyFrame::get_contents()
      # all of these methods are not working of course, but i see no way!?
      contentarray = [ [ "Ruby" , "Ruby Test Description" , "2009-12-15 12:34", "2010-04-05 11:24" ] , [ "C++" , "C++ Test Description" , "2008-10-02 15:54", "2009-05-05 14:45" ] ]
      return "#{contentarray.at(item).at(col)}"
    end

    create_status_bar(1)
    self.status_text = "I need help, plz! Select an Item ..."

    @listctrl.evt_list_item_selected(@listctrl.get_id()) {|event| on_item_selected(event)}
    evt_menu Wx::ID_EXIT, :on_quit
  end

  def on_quit
    close()
  end

  def on_item_selected(event)
    item = event.get_item()
    # is it possible to access the data this way?
    # of course i can get the data via index if my contentarray is accessible.
    self.status_text = "Index: #{event.get_index()}. Contents: #{item.get_data()}."
  end

  def get_contents()
    # returns the data
    contentarray = [ [ "Ruby" , "Ruby Test Description" , "2009-12-15 12:34", "2010-04-05 11:24" ] , [ "C++" , "C++ Test Description" , "2008-10-02 15:54", "2009-05-05 14:45" ] ]
  end

end

Wx::App.run do 
  self.app_name = 'testframe'
  frame = MyFrame.new("testframe")
  frame.set_min_size( [ 600 , 400 ] )
  frame.centre
  frame.show
end


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