|
|
- Accueil Actualités IT Pro
- Conception Cycle de vie du logiciel
- Java Plateforme et langage Java
- .NET Microsoft Framework .NET
- Dév. Web Développement Web et Webmarketing
- EDI Environnements de Développement Intégré
- Langages Langages de programmation applicatifs
- SGBD Systèmes de Gestion de Bases de Données
- Office Bureautique pour l'entreprise
- Solutions d'entreprise Autres logiciels pour l'entreprise
- Applications Applications logicielles
- Systèmes Logiciels et matériels systèmes
              
Extending QML - Default Property ExampleFiles:
This example builds on:
The Default Property Example is a minor modification of the Extending QML - Inheritance and Coercion Example that simplifies the specification of a BirthdayParty through the use of a default property. BirthdayParty { host: Boy { name: "Bob Jones" shoeSize: 12 } Boy { name: "Leo Hodges" } Boy { name: "Jack Smith" } Girl { name: "Anne Brown" } } Declaring the BirthdayParty classThe only difference between this example and the last, is the addition of the DefaultProperty class info annotation. class BirthdayParty : public QObject { Q_OBJECT Q_PROPERTY(Person *host READ host WRITE setHost) Q_PROPERTY(QDeclarativeListProperty<Person> guests READ guests) Q_CLASSINFO("DefaultProperty", "guests") public: BirthdayParty(QObject *parent = 0); Person *host() const; void setHost(Person *); QDeclarativeListProperty<Person> guests(); int guestCount() const; Person *guest(int) const; private: Person *m_host; QList<Person *> m_guests; }; The default property specifies the property to assign to whenever an explicit property is not specified, in the case of the BirthdayParty element the guest property. It is purely a syntactic simplification, the behavior is identical to specifying the property by name, but it can add a more natural feel in many situations. The default property must be either an object or list property. Running the exampleThe main.cpp file in the example includes a simple shell application that loads and runs the QML snippet shown at the beginning of this page. © 2008-2011 Nokia Corporation and/or its subsidiaries. Nokia, Qt and their respective logos are trademarks of Nokia Corporation in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. Privacy Policy Licensees holding valid Qt Commercial licenses may use this document in accordance with the Qt Commercial License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Nokia. Alternatively, this document may be used under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. |
