By Tennis C.
See how one can use the robust Qt3 library to create cross-platform GUI purposes for Linux and OS X in Ruby. Covers install, simple and complex programming, occasion versions, and Korundum.
Read or Download Rapid GUI Development with QtRuby PDF
Similar programming books
Learn the right way to create your individual absolutely functioning role-playing online game (RPG) with visible C# online game PROGRAMMING for teenagers! a real beginner's advisor, the ebook covers each one crucial step for growing your personal entire RPG utilizing home windows kinds and GDI+, together with a tiled scroller, video game editors, and scripting. whereas a few event with visible C# is useful, this publication is an introductory advisor for readers who're new to programming or new to programming for video games and need to benefit the fundamentals of RPG video game mechanics. you are going to examine by way of learning the fast examples in every one bankruptcy, construction the whole RPG known as Dungeon Crawler as you progress from one bankruptcy to the following, with new beneficial properties and video game play parts extra in each one new bankruptcy. alongside the way in which you'll realize how one can load and draw bitmaps, create sprites, render a online game global, preserve tune of stock and personality stats, and construct instruments together with a degree editor, personality editor, merchandise editor, and monster editor. And the completed Dungeon Crawler video game contains all of the resource code and instruments you'll intend to make your individual impressive RPGs with a great deal of cool positive factors and performance.
This e-book is designed to severely evaluation experimental findings on ionic polymers and colloidal debris and to end up a theoretical framework in accordance with the Poisson-Boltzmann method. constitution formation in ionic polymer strategies has attracted awareness because the days of H. Staudinger and J. D. Bernal.
This quantity provides the complaints of the nineteenth foreign Colloquium onAutomata, Languages, and Programming (ICALP ninety two) in a chain of conferences backed via the ecu organization for Theoretical laptop technological know-how (EATCS). ICALP is a largely dependent convention protecting all elements of theoretical computing device technology, together with such subject matters as computability, automata, formal languages, time period rewriting, research of algorithms, computational geometry, computational complexity, symbolic and algebraic computation, cryptography, info varieties and knowledge buildings, conception of databases and information bases, semantics of programming languages, software specification, transformation and verification, foundations of good judgment programming, concept of logical layout andlayout, parallel and allotted computation, thought of concurrency, and thought of robotics.
- X Window Applications Programming
- Object-Oriented Systems Analysis and Design Using UML (3rd Edition)
- Coders at Work: Reflections on the Craft of Programming
- Go in Action
Extra info for Rapid GUI Development with QtRuby
6 Summary • All QtRuby widgets inherit from the base class Qt::Widget. This in turn inherits from Qt::Object. • All QtRuby widgets fit into an overall family tree structure. Child widgets are contained within the physical geometry of the parent. Destruction of a widget causes all of its descendants to be destroyed as well. • Every QtRuby program needs one and only one Qt::Application instance. It must be created before any GUI widgets are initialized. • The application event loop starts with a call to Qt::Application’s exec( ) method.
To_s + " times" ) F ridays BOOKLEET © Report erratum 55 C HAPTER 5. T AKE THE P LUNGE S IGNALS tripped_times_signal(int) AND S LOTS 56 emit timer_tripped_slot timeo u t() ) ext( setT @label The Timer... 15: Custom Widget with Signals and Slots emit tripped_times_signal(@tripped_times) end end In this example, we create a Qt::Timer that gets activated every second Qt::Timer is a very convenient class for repeatedly calling a slot at a certain frequency. In most cases, a Qt::Timer can be accurate to 1 millisecond.
In Qt programs, slots get connected to signals in order to automate tasks. 5, Signals and Slots, on the following page for more details. gram to see just how easy using them really is. In order to take advantage of the automation, we need to define exactly what is a signal and what is a slot. Since our @button widget is a built in Qt::PushButton, its clicked( ) signal is already defined for us. However, the slot we will be connecting it to, button_was_clicked( ) has not been defined as a slot. A simple line in our MyWidget class handles that for us: slots 'button_was_clicked()' And last, in the MyWidget initializer, we need to connect the signal and slot together: connect(@button, SIGNAL('clicked()' ), self, SLOT('button_was_clicked()' )) When put all together, our final program looks like this: require 'Qt' class MyWidget < Qt::Widget slots 'button_was_clicked()' def initialize(parent=nil) F ridays BOOKLEET © Report erratum 46 C HAPTER 5.