Development/Tutorials (es)

Development/Tutorials

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noframe

Traducción en curso: solo hasta el punto 4, también está traducido el punto 13 (Plasma)

Aviso

Los tutoriales son la forma más rápida de encontrar lo que KDE puede hacer por usted y como hacerlo. Aquí tienes una lista de los tutoriales disponibles actualmente para KDE4. Material para KDE3 y KDE2 está disponible al final de la página.

Introducción a la programación en KDE4

Estś interesado en escribir aplicacion en KDE4? Esta serie de tutoriales están dirigidos a personas totalmente novatas en la programación en KDE4.

Hola Mundo

Una introducción preliminar a los aspectos básicos de la programación en KDE4.

Crear la ventana principal

Este tutorial te muestra la magia de la cosa mas importante en una aplicación: la ventana principal

Usar KActions

Como añadir acciones a los menús y a las toolbars.

Guardar y Abrir

Introducción a la biblioteca KIO mientras añades soporte para guardar y abrir en tu aplicación.

Argumentos en la línea de órdenes

Añade la capacidad de especificar a nuestro editor que archivo abrir desde la línea de ordenes.

Básicos

Portar tu aplicación

Ayuda para portar aplicaciones de Qt3/KDE3 a Qt4/KDE4.

Introducción a CMake

Como usar el sistema de construcción CMake usado por KDE4.

Errores comunes de programación

Varios errores comunes que se presentan en el desarrollo de aplicaciones Qt y KDE y como evitarlos.

Usar Qt Designer para diseñar interfaces de usuario

Como crear archivos UI con el diseñador, y como integrarlos después en un programa KDE.

Crear bibliotecas para compartir código

Como añadir la biblioteca al "buildsystem" y como preparar el código fuente.

How to add the library to the buildsystem and how to prepare the source code.

Comprobación y depurado

Depurar tu aplicación

Consejos, herramientas y técnicas para depurar tu aplicación KDE.

Escribir "unittests" para Qt4 y KDE4 con QTestLib (enlace original)

Tutorial de Brad Hards que describe como escribir unittests mediante la framework QTestLib. El tutorial se realiza con un ejemplo, y aun está en desarrollo.

Maneras semiautomáticas de detectar errores en el código

Técnicas que puedes usar para detectar errores en el código KDE.

Gestión de los datos de configuración con KConfig

Introducción a KConfig

Una sinopsis de las clases de KConfig y como usarlas en el código de tu aplicación.

Uso de KConfig XT

Tutorial sobre como usar eficientemente el framework KConfig XT

Actualizando archivos con KConfig

Tutorial sobre como escribir un script de actualización para conservar los cambios de tu archivo de configuración de tu aplicación y sincornizarlo con el archivo de configuración del usuario

Services: Applications and Plugins

Introduction to the Services Framework

An overview of the services framework in KDE and what it provides the application developer. Covers the system configuration cache (SyCoCa), the source data files and what the indexed information can be used for.

Finding Services Using Trader Queries

How to find services, such as plugins or mimetypes, that are indexed in the SyCoCa using Trader Query Syntax

Creating and Loading Plugins Using KService

Learn how to define custom plugin types, find installed plugins (including 3rd party plugins) and load them in an easy and portable fashion using KService.

Localization

See also Localization portal.

Introduction To Unicode

An introduction to what Unicode is as well as how to handle Unicode data in KDE applications.

Writing Applications With Localization In Mind

This tutorial covers what localization is, why it's important and how to ensure your application is ready to be localized. A must read for all application developers.

Avoiding Common Localization Pitfalls

There are several common mistakes that prevent applications from being properly localized. Find out what they are and how to easily avoid them in this tutorial.

Building KDE's Localization Module

Building and installing language support from KDE's localization (l10n) module is a good idea for those working on applications in the main KDE repository. Doing so will allow you to test your application in another language and spot problem areas. Learn how to do just that in this tutorial.

Incorporating i18n Into the Build System

Once your application is ready to be localized, the next step is to ensure that translation files are built automatically and kept up to date. This tutorial covers the necessary CMakeFiles.txt additions as well the process of distributing the resulting message catalogs with your application.

Common i18n Challenges and Solutions

This tutorial covers challenges that you may eventually run into such as translating handbooks and other data that exists outside of the source code, merging and handling obsolete .po files, dealing with freezes, coding in languages other than English and creating independent releases of or moving applications between KDE modules.

Semantic Markup of Messages

To ensure consistent presentation and more meaningful representations of messages in applications, semantic markup can be applied to messages marked for translation using the KUIT system. This tutorial describes how this system works.

Automated i18n Code Checking

The Krazy code checker scans KDE's code and reports common i18n mistakes.

Documentation

API Documentation

This tutorial explains how to document your APIs properly.

Man Pages

Writing and Generating Reference Manual Pages.

Application Automation and Scripting

D-Bus

Introduction to D-Bus

A straight-forward introduction to the core concepts in D-Bus from an application developer's perspective, this tutorial covers what D-Bus is and how it can be used by applications.

Accessing D-Bus Interfaces

A step-by-step guide to calling D-Bus methods and connecting to D-Bus signals using QtDBus.

Intermediate D-Bus

Tips to make use of QtDBus when faced with problematic real-world interfaces.

Creating D-Bus Interfaces

Learn how to expose functionality in your application by creating and using custom D-Bus interfaces. Covers generating the XML descriptions, instantiating interfaces at run time and setting up the build system with CMake.

D-Bus Autostart Services

Turn your application into a D-Bus autostart service with this tutorial. This D-Bus feature, also known as "D-Bus service activation", will ensure that even when your application isn't running that D-Bus calls made to it will work by relying on the D-Bus daemon itself to start your app if and when needed.

Porting from DCOP to D-Bus

Port your applications from DCOP to D-Bus with this handy guide.

Konqueror

Creating Konqueror Service Menus

This tutorial shows you how to create mimetype-specific actions in Konqueror's context menu (aka "servicemenus").

Kross

Introduction to Kross

An introduction to the Kross Scripting Framework.

Hello World

A first application with working kross code.

Calling Functions in Kross

Simple demonstration of calling scripting functions

Connecting Signals and Slots in Kross

Simple demonstration of connecting object signals with script slots

Scripts as Plugins with Kross

This tutorial provides a step-by-step introduction how to integrate scripts as plugins into a KDE application.

Load Kross Scripts as KPlugins

This tutorial provides a step-by-step introduction how to load scripts as KPlugins.

Placing script actions in your application menus

Simple demonstration on how to extend you application menus to execute script files.

KOffice

KOffice Overview

This document shows an overview of the different KOffice plugin types and tells you what each of their purpose and strengths are. If you are new with KOffice plugins, this is the place to start.

Creating KOffice Flake Plugins

This tutorial shows you how you can build a plugin for KOffice applications to allow you embed content in ODF documents using Flake.

KWord Scripting

This tutorial shows how to script KWord with Python, Ruby or JavaScript using Kross.

KSpread Scripting

This tutorial shows how to script KSpread with Python, Ruby or JavaScript using Kross.

Krita Scripting

This tutorial shows how to script Krita with Python, Ruby or JavaScript using Kross.

SuperKaramba

SuperKaramba Tutorial

This tutorial provides an overview of SuperKaramba, theme files and scripting with Python, Ruby and JavaScript.

Plugins and KParts

Writing kontact plugins

Kontact plugins are KParts. This tutorial describes how you can write one.

Using KParts

Learn how to load a KPart into an application window.

Search and Metadata

Strigi

Writing file analyzers

File analyzers extract data from files to display in the file dialogs and file managers. The data gathered this way is also used to search for files. KDE4 allows the use of multiple analyzers per file type. This tutorial describes how you can write new analyzers.

Nepomuk

Nepomuk Quickstart

How to use Nepomuk resources in a quick and painless way without much fuss.

RDF and Ontologies in Nepomuk

An introduction to RDF and the usage of ontologies in Nepomuk.

Handling Resources with Nepomuk

Nepomuk is the KDE library which provides easy access to metadata in the Nepomuk system. Learn how to make your application create and read metadata using the Nepomuk system.

Using the Nepomuk Resource Generator

Nepomuk includes a resource generator which creates convenience classes for handling metadata.

The Nepomuk Server

The Nepomuk Server hosts the main Nepomuk data repository and can be accessed directly via a Soprano API.

Nepomuk Services

The Nepomuk Server manages a set of Nepomuk services.

Advanced Queries

The real power of Nepomuk can only be exposed when performing fancy queries on the data repository. This tutorial provides an introduction to semantic and full text queries in Nepomuk.

Hardware Awareness (Solid)

Introduction to Solid

An introduction to using the Solid hardware discovery and interaction system in KDE applications.

Accessing Network Information

How to use the Solid system to get information about the network

Multimedia (Phonon)

Phonon

How to start with the multimedia API

How to compile and use Phonon and its GStreamer backend on Linux using Qt 4.3.x

This article gives you a quick brief of how you can use checkout, compile Phonon and its GStreamer backend on GNU/Linux with just Qt 4.3.x. Towards the end, the article also describes how a developer can make use of Phonon to create simple audio and video players. You can read the article here. You can download the editable OpenDocumentText file from here.

Plasma

Primeros pasos con los Plasmoids

Crea tu primer widget de Plasma, o Plasmoid, en C++ con un fondo SVG, un icono y algo de texto.

Escribir DataEngine

DataEngines proporcionan una interfaz estandarizada para varias fuentes de datos para usarlos en las visualizaciones. Aprende que es un DataEngine y como escribir uno.

Usar DataEngines en los Plasmoids

Con un DateEngine, es posible recuperar datos para mostrarlos de una forma simple y estandar. Este tutorial abarca el tema de como usar DataEngines en los Plasmoids.

Crear Runners

Los "Runners" son plugins que proporcionan la funcionalidad de busqueda basada en acciones mediante el dialogo "ejecutar orden" en el area de trabajo de Plasma. Estos plugins pueden ser usados por cualquier aplicación que enlace con libplasma.

Creating a Plasma Theme

Guía para crear tu primer tema de Plasma.

Usar Extenders

Esta guía te muestra como crear un simple applet (destripando el applet kuiserver) que use extenders.

Communication (Decibel)

Getting started with Decibel

This tutorial describes how to set up Decibel.

Handling TextChannels

This tutorial introduces the basics of handling incoming TextChannels by guiding you through building a simple text chat application.

Personal Information Management (Akonadi)

Developing Akonadi Resources

Akonadi Resources are agent programs which transport PIM data between Akonadi and a backend (files, servers, etc)

Kate / Kwrite

Getting started with KTextEditor plugins

Creating your first KTextEditor plugin

Developing a plugin with configuration dialog

Adding a configuration dialog to the Time & Date example

A small Editor

Create a small application using KTextEditor

Printing

Hello World

Introduction to the KDE printing system

Print Dialog

Using the KDE print dialog

Get Hot New Stuff

New introduction to KGet Hot New Stuff2

A short tutorial about how to use KHotNewStuff2 in your application.

• old links for KNS1 content:

Introduction to Get Hot New Stuff

An introduction to the developer-friendly network update system that allows KDE applications to fetch new application data at runtime in a user friendly manner.

KNewStuff Secure (Original Link)

Tutorial showing how to share resources in a secured way (KDE 3.4 and later). By András Mantia <[email protected]>.

Goya

Introduction to Goya usage

An introduction for the Goya subsystem usage, which allows you to easily add widgets to your itemviews and connect their signals to your code, as they were real widgets.

Introduction to Goya usage (part 2)

The second part of the tutorial, with a slightly more complex example than the first part.

Rapid Application Development

Python

101 Introduction to signals and slots

A simple introduction to Qt's signal and slot architecture.

Ruby

KDE Ruby Korundum tutorial

A ruby version of Antonio Larrosa Jiménez's KDE tutorial by Richard Dale. See the Ruby Developers Corner for Qt tutorials and other info.

Qt4 Ruby Tutorial

Trolltech's fabulous introductory tutorial to Qt, translated to Ruby.

Creating a Plasma Widget in Ruby

Tutorial that shows how to create your first Plasma Applet using the Ruby language.

Shell

Shell Scripting with KDE dialogs (Original Link)

Tutorial by Brad Hards that describes how to use KDE dialogs in shell scripts with kdialog. It is presented as an example based tutorial.

Graphics Programming

QPainter Perfomance

Hints on avoiding common mistakes leading to poor performance when using QPainter

Using the KDE Games Libraries

KStandardGameAction

Using libkdegames to make your game fit the kdegames standard

Highscores

Implementing a simple highscore table into your game

Theme Selector

Using the libkdegames theme selection dialog

Palapeli Patterns

Creating a pattern for Palapeli

Other tutorials

2D Plotting (KPlotWidget)

Using the KDE data-plotting widget

This tutorial introduces KPlotWidget, which is used for 2-D data plotting. It includes information on simple usage of the widget (including adding and modifying data sets, and customizing the plot axes and labels), and advanced customization (including extending the widget through sub-classing).

Spelling and Grammar Checking (Sonnet)

Adding spell-checking or grammar-checking to KDE applications

This tutorial introduces Sonnet and how one may use it to add language correction to your KDE application. Sonnet's auxiliary features shall be described in a separate tutorial.

Pixmap cache (KPixmapCache)

Using the KDE pixmap cache

This tutorial shows how to use KPixmapCache to cache e.g. pixmaps generated from SVGs or some data.

Using MarbleWidget (Marble)

Using MarbleWidget

This short tutorial describes how to use the MarbleWidget in your project

Using local SCM for KDE development

Using Git to develop for KDE

This tutorial shows how to use Git to develop for KDE

KDE2 and KDE3 Materials

KDE3 Tutorials

These tutorials cover topics related to KDE3.

KDE2 Tutorials

These tutorials cover topics related to KDE2.