DZone Snippets: text code

Adding a combo box to a Ruby Maemo application

jrobertson (James Robertson) — Tue, 07 Oct 2008 15:32:33 GMT

Here is a script to run a Ruby Maemo application which has a combo box.



#! /usr/bin/env ruby

#file: combo.rb



#require 'gtk'

require 'hildon'



program = Hildon::Program.instance



#window = Gtk::Window.new(Gtk::WINDOW_TOPLEVEL)

window = program.add_window Hildon::Window.new



combo = Gtk::Combo.new

combo.set_popdown_strings(['http://www.netlab.co.jp/ruby/',

			    'http://ruby.freak.ne.jp/'])

combo.entry.set_text ''

window.add(combo)

combo.show

window.show

Gtk.main

You can see from the output on the N800 [twitxr.com] as I selected an item from the combo box'.

Resources:
- Adding a text entry box in a Ruby Maemo application [dzone.com]
- エントリウィジェットとコンボウィジェット - Ruby/Gtk Programming [sourceforge.net]
- Hello World in Ruby/GTK [sourceforge.net]

Adding a text entry box in a Ruby Maemo application

jrobertson (James Robertson) — Tue, 07 Oct 2008 15:15:11 GMT

Here is a script to run a Ruby Maemo application which has a text entry box. There's nothing special about this code other than it uses 'hildon' instead of Gtk.

The only code changes from the original Ruby GTK code was to comment out the gtk include file and the Gtk Window.new statement.



#! /usr/bin/env ruby

#file: entry.rb



#require 'gtk'

require 'hildon'



program = Hildon::Program.instance



#window = Gtk::Window.new(Gtk::WINDOW_TOPLEVEL)

window = program.add_window Hildon::Window.new



label = Gtk::Label.new('Name:')

entry = Gtk::Entry.new

entry.set_text('John')

box = Gtk::HBox.new(false, 0)

box.pack_start label, true, true, 5

box.pack_start entry, true, true, 5

label.show

entry.show



entry.signal_connect('activate') {|widget|

  print "Your name is #{entry.get_text}\n"

}



window.add(box)

box.show

window.show

Gtk.main

You can see from the output on the N800 [twitxr.com] as I replaced the entry value 'John' with 'Jim'.

Resources:
- エントリウィジェットとコンボウィジェット - Ruby/Gtk Programming [sourceforge.net]
- Hello World in Ruby/GTK [sourceforge.net]

Listen to your XMPP messages with Festival

jrobertson (James Robertson) — Fri, 19 Sep 2008 15:01:52 GMT

Source: Fun with Instant Messaging and Ruby LG #149 [linuxgazette.net]



#!/usr/bin/ruby



require 'rubygems'  

require 'xmpp4r-simple'  



username = 'monica'

password = 'password4monica'

$to_username = "james"





def talk(x)

  system("echo '#{x}' | festival --tts")

end



puts "connecting to jabber server..."  

jabber = Jabber::Simple.new(username+'@jamesrobertson.eu', password)  

puts "Connected."  

jabber.deliver($to_username+"@jamesrobertson.eu", "Hello..!")  





Thread.new{

  while true

    jabber.deliver($to_username+"@jamesrobertson.eu", $stdin.gets)  

    puts "-"*80  

  end

}



while (true) do  

  jabber.received_messages do |msg|  

    puts "="*80  

    $to_username = msg.from.node

    puts  msg.from.node + ":" + msg.body



    talk msg.body.gsub(/</,'<').gsub(/>/,'>').gsub(/'/,'').gsub(/"/,'"').gsub(/&/,'&')



  end 

  sleep(1) 

end

This script was tested on Ubuntu 8.04 within a VirtualBox VM containing Ubuntu 8.04, with Ruby 1.8.6, Festival, and festvox-rablpc16k.

I found the script while googling for 'ruby im gateway' [google.co.uk]

Change Ubuntu's default text editor

jrobertson (James Robertson) — Tue, 02 Sep 2008 15:40:32 GMT

Tired with using nano as the default text editor in Ubuntu? To change the text editor permanently to vi type the following command from the command line.
sudo update-alternatives --config editor

Convert a PDF document to text

jrobertson (James Robertson) — Mon, 01 Sep 2008 20:44:36 GMT

pdftotext book.pdf > book.txt

Strip the line numbers from code snippets

jrobertson (James Robertson) — Sat, 16 Aug 2008 11:49:57 GMT

Source: Saari Development: Ruby: One liner to strip the line number from code posted [blogspot.com]



ruby -lne 'puts $_.gsub(/^\s+?\d+\s/,"")' ali.rb > ali.rb

Here's a page that allows you to strip line numbers without any script [rorbuilder.info] or here http://rubyurl.com/umxP .

use markdown with django

indiehead (John) — Wed, 13 Aug 2008 09:46:56 GMT

http://www.freewisdom.org/projects/python-markdown/Django

Install markdown and make sure it is in your python path.

http://www.freewisdom.org/projects/python-markdown/Installation

Include 'django.contrib.markup' in INSTALLED_APPS in your settings.py file.



..load

{% load markup %}



..then use

{{ post.body|markdown }}

Fill text with javascript

ciceraccio (Ciceraccio) — Wed, 23 Jul 2008 08:00:28 GMT

// description of your code here

Javascript count line breaks

featurelover (Jochen Preusche) — Tue, 15 Jul 2008 08:57:23 GMT

Returns the number of line breaks in a string.



function lineBreakCount(str){

	/* counts \n */

	try {

		return((str.match(/[^\n]*\n[^\n]*/gi).length));

	} catch(e) {

		return 0;

	}

}

Converting text to SVG

jrobertson (James Robertson) — Fri, 18 Apr 2008 18:14:11 GMT

First of all the Ruby code reads the text, splits it into an array and then saves it in XML format.



require 'rexml/document'

include REXML



a = "Open source is a development method for software that harnesses the power of distributed peer 

review and transparency of process. The promise of open source is better quality, higher reliability, 

more flexibility, lower cost, and an end to predatory vendor lock-in.".split(' ') 



doc = Document.new

doc.add_element('text')

oline = Element.new('line')



char_count = 0

a.each do |word|

  

  oword = Element.new('word')

  oword.text = word.to_s

  oword.add_attribute('length',char_count)

  oline << oword 

  char_count += word.length

  

  if char_count > 50

    doc.root << oline

    oline = Element.new('line')

    char_count = 0

  end

end

doc.root << oline

puts char_count

puts doc

Here's a sample of the XML created





  

    Opensourceis

    adevelopmentmethod

    forsoftwarethat

    harnesses

  

  

    thepower

    ofdistributedpeer

    reviewandtransparency

    ofprocess.

  

  

    The

    promiseofopen

    sourceisbetter

    quality,higherreliability,

  

  

    moreflexibility,lower

    cost,andan

    endtopredatory

    vendor

  

  

    lock-in.

The XML is then transformed to SVG using the following XSL file











            method="xml"

            indent="yes"/>

            

  

                      xmlns:xlink="http://www.w3.org/1999/xlink" >

      

        

      

    

  

  

  

    12

    20

The final SVG output [twitxr.com] shows 5 lines of text with each word as a separate SVG text element.