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Introducing QtRuby Ynon Perek http://qtcollege.co.il Friday, August 3, 12

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Friday, August 3, 12

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Friday, August 3, 12

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sudo apt-get install lynx Friday, August 3, 12

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Friday, August 3, 12

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Agenda • GUI Programming • Qt Framework • QtRuby In Action Friday, August 3, 12

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About Me • Ynon Perek • [email protected] • http://qtcollege.co.il Friday, August 3, 12

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Desktop UI Friday, August 3, 12

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GUI Frameworks Friday, August 3, 12

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Choose Qt • Easy To Start Friday, August 3, 12

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Choose Qt • Easy To Start • Mature and widely used Friday, August 3, 12

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Famous Qt Apps Friday, August 3, 12

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Famous Qt Apps Friday, August 3, 12

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Choose Qt • Easy To Start • Mature and widely used • True Cross Platform Friday, August 3, 12

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Choose Qt Friday, August 3, 12

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Choose Qt • Easy To Start • Mature and widely used • True Cross Platform • Cross Language Friday, August 3, 12

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Choose Qt • C++ • Java • Ruby • Perl • Python • And More... Friday, August 3, 12

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Q & A Friday, August 3, 12

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Hello Qt require 'Qt' app = Qt::Application.new( ARGV ) w = Qt::Label.new( "Hello World" ) w.set_alignment( Qt::AlignHCenter | Qt::AlignVCenter ) w.show app.exec Friday, August 3, 12

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Qt Terminology • a Widget is a visible component • Label, Button, Table, List, ... Friday, August 3, 12

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Qt Terminology Widget Friday, August 3, 12

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Qt Widgets Friday, August 3, 12

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Qt Widgets http://doc.qt.nokia.com/4.7-snapshot/gallery.html Friday, August 3, 12

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Qt Layouts • A top level widget may contain other widgets • Child widgets are arranged in a layout Friday, August 3, 12

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DEMO: UI Designer Friday, August 3, 12

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Qt Terminology • Signal specifies a semantic event Friday, August 3, 12

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Qt Terminology • Signals are connected to slots which are the handling code Friday, August 3, 12

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Designer Takeaways • Drag & Drop to create UI • Save as .ui file • Run: rbuic4 file.ui -x -o file_ui.rb • Use resulting .rb file but don’t modify it Friday, August 3, 12

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Qt Actions require 'Qt' require './demo1_ui.rb' a = Qt::Application.new(ARGV) u = Ui_Form.new w = Qt::Widget.new u.setupUi(w) w.show u.btn1.connect( SIGNAL :clicked ) { u.list1.add_item( "Qt FTW" ) } a.exec Friday, August 3, 12

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Qt Stock Dialogs • Qt::MessageBox.about • Qt::FileDialog.get_open_file_name • Qt::FileDialog.get_save_file_name Friday, August 3, 12

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Qt Stock Dialogs require 'Qt' require './demo1_ui.rb' a = Qt::Application.new(ARGV) u = Ui_Form.new w = Qt::Widget.new u.setupUi(w) w.show u.btn1.connect( SIGNAL :clicked ) { filename = Qt::FileDialog.get_open_file_name; u.list1.add_item( filename ) } a.exec Friday, August 3, 12

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Q & A Friday, August 3, 12

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QtRuby • Easy UI for your programs • Solid Foundations Friday, August 3, 12

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What Next • Qt Developers Meetup • August 7, 19:00 • http://meetup.com/QtEverywhere/ Tel-Aviv-Yafo-IL/740512/ Friday, August 3, 12

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Resources • Ruby Qt/KDE Guide http://techbase.kde.org/Development/ Languages/Ruby • Qt Tutorial Videos http://qt-project.org/videos Friday, August 3, 12

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About Me • Ynon Perek • [email protected] • http://qtcollege.co.il Friday, August 3, 12