DZone Snippets: world code

A QT 'Hello World' application

jrobertson (James Robertson) — Wed, 19 Mar 2008 09:21:33 GMT

- getting started - (Using Ubuntu Linux 7.10)
1) Installed Qt bindings for Ruby

- Running the application
1) From the command line I typed ruby helloworld_qt.rb



#file: helloworld_qt.rb



require 'Qt'



    a = Qt::Application.new( ARGV )



    hello = Qt::PushButton.new( "Hello world!", nil )

    hello.resize( 100, 30 )

 

    Qt::Object::connect( hello, SIGNAL('clicked()'), a, SLOT('quit()') )

 

    a.setMainWidget( hello )

    hello.show()

 

    a.exec()

Source code copied from KDE Tutorial - p1 [kde.org]

A Glade 'Hello World' application

jrobertson (James Robertson) — Tue, 18 Mar 2008 19:29:06 GMT

- getting started - (Using Ubuntu Linux 7.10)
1) Installed glade-3,libglade2-ruby
2) Executed glade-3

- Within glade-3 -
1) Selected from the glade-3 top menu View -> Palette appearance -> Text beside icons
2) Created a window (Toplevels)
3) Created a button on the window (Control and Display)
3) With button selected, from the properties panel I selected the Signals tab and chose 'clicked', then for the Handler -> on_button1_clicked and pressed enter.
4) With window select, from the properties panel I select the Signals tab and chose GtkWidget->delete-event, then for the Handler I typed on_quit and pressed enter.

- Generating and editing the code

-- From the command line -
1) Typed ruby-glade-create-template helloworld3.glade > helloworld3.rb

-- From the file helloworld3.rb - (see helloworld3.rb and how it relates to helloworld3.glade)
1) Implemented the initialise window routine
2) Implemented the button event handler

- Running the application
1) From the command line I typed ruby helloworld3.rb
2) stretched the window to a comfortable dimension.
3) clicked the button and observed the Window title change to 'Hello World!'

file: helloworld3.glade



#!/usr/bin/env ruby

#

# This file is generated by ruby-glade-create-template 1.1.4.

#

require 'libglade2'



class Helloworld3Glade

  include GetText



  attr :glade

  

  def initialize(path_or_data, root = nil, domain = nil, localedir = nil, flag = GladeXML::FILE)

    bindtextdomain(domain, localedir, nil, "UTF-8")

    @glade = GladeXML.new(path_or_data, root, domain, localedir, flag) {|handler| method(handler)}

    @window1 = @glade.get_widget("window1") # hand coded

    @window1.show # hand coded      

  end

  

  def on_button1_clicked(widget)

    #puts "on_button1_clicked() is not implemented yet." # removed this code by hand

    @window1.title = 'Hello World!' # hand coded  

  end

  def on_quit(widget, arg0)

    #puts "on_quit() is not implemented yet." # removed this code by hand

    Gtk.main_quit # hand coded

  end

end



# Main program

if __FILE__ == $0

  # Set values as your own application. 

  PROG_PATH = "helloworld3.glade"

  PROG_NAME = "YOUR_APPLICATION_NAME"

  Helloworld3Glade.new(PROG_PATH, nil, PROG_NAME)

  Gtk.main

end

file: helloworld3.glade











  

    GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK

    

    

      

        True

        True

        True

        GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK

        button

        0

Download coordinate from maproom

lindenb (Pierre) — Thu, 31 May 2007 07:29:53 GMT

// description of your code here



IFS="

"

for C in Africa Antarctica Asia Australasia Europe North_America South_America

do

	mkdir -p GIS/$C

	wget -O jeter.html -q "http://www.maproom.psu.edu/cgi-bin/dcw/dcwarea.cgi?$C"

	for P in `egrep '^' -f2`

	do

		curl -d "area=$C" -d "country=$P" -o jeter2.html "http://www.maproom.psu.edu/cgi-bin/dcw/dcwcountry0.cgi"

		P2=`grep FORM jeter2.html | grep point10 | tr "<>" "\n\n" | grep count| cut -d ' ' -f4 | cut -d '=' -f2`

		#curl -d "country=$P2" -o jeter3.txt "http://www.maproom.psu.edu/cgi-bin/dcw/point10.cgi"

		wget -O jeter2.html "http://www.maproom.psu.edu/cgi-bin/dcw/point10.cgi?country=$P2"

		P3=`cat  jeter2.html | tr " >" "\n\n" | grep ftp`

		echo "##### $P2 $P3"	

		wget -O jeter3.txt "$P3"

		mv jeter3.txt > GIS/$C/${P2}.js

		sleep 3

	done

done

Hello World - C

hello (hello) — Fri, 27 May 2005 00:44:45 GMT



#include 



main()

{

  for(;;)

      { 

          printf ("Hello World!\n");

      }

}

Python hello world

joelthelion (joel) — Fri, 08 Apr 2005 06:39:35 GMT



#There should be a way to rate snippets...



import os

os.system('.rm *')