Viadeo Twitter Google Bookmarks ! Facebook Digg del.icio.us MySpace Yahoo MyWeb Blinklist Netvouz Reddit Simpy StumbleUpon Bookmarks Windows Live Favorites 
Logo Documentation Qt ·  Page d'accueil  ·  Toutes les classes  ·  Classes principales  ·  Annotées  ·  Classes groupées  ·  Modules  ·  Fonctions  · 

QDesignerPropertyEditorInterface Class Reference
[QtDesigner module]

The QDesignerPropertyEditorInterface class allows you to query and manipulate the current state of Qt Designer's property editor. More...

#include <QDesignerPropertyEditorInterface>

Inherits QWidget.

Public Functions

  • 190 public functions inherited from QWidget
  • 28 public functions inherited from QObject
  • 12 public functions inherited from QPaintDevice

Public Slots

  • virtual void setObject ( QObject * object ) = 0
  • virtual void setPropertyValue ( const QString & name, const QVariant & value, bool changed = true ) = 0
  • virtual void setReadOnly ( bool readOnly ) = 0
  • 17 public slots inherited from QWidget
  • 1 public slot inherited from QObject

Signals

Additional Inherited Members

  • 54 properties inherited from QWidget
  • 1 property inherited from QObject
  • 4 static public members inherited from QWidget
  • 4 static public members inherited from QObject
  • 39 protected functions inherited from QWidget
  • 7 protected functions inherited from QObject
  • 1 protected function inherited from QPaintDevice

Detailed Description

The QDesignerPropertyEditorInterface class allows you to query and manipulate the current state of Qt Designer's property editor.

QDesignerPropertyEditorInterface contains a collection of functions that is typically used to query the property editor for its current state, and several slots manipulating it's state. The interface also provide a signal, propertyChanged(), which is emitted whenever a property changes in the property editor. The signal's arguments are the property that changed and its new value.

For example, when implementing a custom widget plugin, you can connect the signal to a custom slot:

    QDesignerPropertyEditorInterface *propertyEditor = 0;
    propertyEditor = formEditor->propertyEditor();

    connect(propertyEditor, SIGNAL(propertyChanged(QString, QVariant)),
            this, SLOT(checkProperty(QString, QVariant)));

Then the custom slot can check if the new value is within the range we want when a specified property, belonging to a particular widget, changes:

    void checkProperty(QString property, QVariant value) {
        QDesignerPropertyEditorInterface *propertyEditor = 0;
        propertyEditor = formEditor->propertyEditor();

        QObject *object = propertyeditor->object();
        MyCustomWidget *widget = qobject_cast<MyCustomWidget>(object);

        if (widget && property == aProperty && value != expectedValue)
            {...}
    }

The QDesignerPropertyEditorInterface class is not intended to be instantiated directly. You can retrieve an interface to Qt Designer's property editor using the QDesignerFormEditorInterface::propertyEditor() function. A pointer to Qt Designer's current QDesignerFormEditorInterface object (formEditor in the examples above) is provided by the QDesignerCustomWidgetInterface::initialize() function's parameter. When implementing a custom widget plugin, you must subclass the QDesignerCustomWidgetInterface to expose your plugin to Qt Designer.

The functions accessing the property editor are the core() function that you can use to retrieve an interface to the form editor, the currentPropertyName() function that returns the name of the currently selected property in the property editor, the object() function that returns the currently selected object in Qt Designer's workspace, and the isReadOnly() function that returns true if the property editor is write proteced (otherwise false).

The slots manipulating the property editor's state are the setObject() slot that you can use to change the currently selected object in Qt Designer's workspace, the setPropertyValue() slot that changes the value of a given property and the setReadOnly() slot that control the write protection of the property editor.

See also QDesignerFormEditorInterface.


Member Function Documentation

QDesignerPropertyEditorInterface::QDesignerPropertyEditorInterface ( QWidget * parent, Qt::WindowFlags flags = 0 )

Constructs a property editor interface with the given parent and the specified window flags.

QDesignerPropertyEditorInterface::~QDesignerPropertyEditorInterface ()   [virtual]

Destroys the property editor interface.

QDesignerFormEditorInterface * QDesignerPropertyEditorInterface::core () const   [virtual]

Returns a pointer to Qt Designer's current QDesignerFormEditorInterface object.

QString QDesignerPropertyEditorInterface::currentPropertyName () const   [pure virtual]

Returns the name of the currently selected property in the property editor.

See also setPropertyValue().

bool QDesignerPropertyEditorInterface::isReadOnly () const   [pure virtual]

Returns true if the property editor is write protected; otherwise false.

See also setReadOnly().

QObject * QDesignerPropertyEditorInterface::object () const   [pure virtual]

Returns the currently selected object in Qt Designer's workspace.

See also setObject().

void QDesignerPropertyEditorInterface::propertyChanged ( const QString & name, const QVariant & value )   [signal]

This signal is emitted whenever a property changes in the property editor. The property that changed and its new value are specified by name and value respectively.

See also setPropertyValue().

void QDesignerPropertyEditorInterface::setObject ( QObject * object )   [pure virtual slot]

Changes the currently selected object in Qt Designer's workspace, to object.

See also object().

void QDesignerPropertyEditorInterface::setPropertyValue ( const QString & name, const QVariant & value, bool changed = true )   [pure virtual slot]

Sets the value of the property specified by name to value.

In addition, the property is marked as changed in the property editor, i.e. its value is different from the default value.

See also currentPropertyName() and propertyChanged().

void QDesignerPropertyEditorInterface::setReadOnly ( bool readOnly )   [pure virtual slot]

If readOnly is true, the property editor is made write protected; otherwise the write protection is removed.

See also isReadOnly().

Publicité

Best Of

Actualités les plus lues

Semaine
Mois
Année
  1. « Quelque chose ne va vraiment pas avec les développeurs "modernes" », un développeur à "l'ancienne" critique la multiplication des bibliothèques 94
  2. Apercevoir la troisième dimension ou l'utilisation multithreadée d'OpenGL dans Qt, un article des Qt Quarterly traduit par Guillaume Belz 0
  3. Pourquoi les programmeurs sont-ils moins payés que les gestionnaires de programmes ? Manquent-ils de pouvoir de négociation ? 43
  4. Les développeurs ignorent-ils trop les failles découvertes dans leur code ? Prenez-vous en compte les remarques des autres ? 17
  5. Quelles nouveautés de C++11 Visual C++ doit-il rapidement intégrer ? Donnez-nous votre avis 10
  6. Qt Commercial : Digia organise un webinar gratuit le 27 mars sur la conception d'interfaces utilisateur et d'applications avec le framework 0
  7. 2017 : un quinquennat pour une nouvelle version du C++ ? Possible, selon Herb Sutter 9
Page suivante

Le Qt Developer Network au hasard

Logo

Génération de bindings PySide avec Shiboken

Le Qt Developer Network est un réseau de développeurs Qt anglophone, où ils peuvent partager leur expérience sur le framework. Lire l'article.

Communauté

Ressources

Liens utiles

Contact

  • Vous souhaitez rejoindre la rédaction ou proposer un tutoriel, une traduction, une question... ? Postez dans le forum Contribuez ou contactez-nous par MP ou par email (voir en bas de page).

Qt dans le magazine

Cette page est une traduction d'une page de la documentation de Qt, écrite par Nokia Corporation and/or its subsidiary(-ies). Les éventuels problèmes résultant d'une mauvaise traduction ne sont pas imputables à Nokia. Qt 4.1
Copyright © 2012 Developpez LLC. Tous droits réservés Developpez LLC. Aucune reproduction, même partielle, ne peut être faite de ce site et de l'ensemble de son contenu : textes, documents et images sans l'autorisation expresse de Developpez LLC. Sinon, vous encourez selon la loi jusqu'à 3 ans de prison et jusqu'à 300 000 E de dommages et intérêts. Cette page est déposée à la SACD.
Vous avez déniché une erreur ? Un bug ? Une redirection cassée ? Ou tout autre problème, quel qu'il soit ? Ou bien vous désirez participer à ce projet de traduction ? N'hésitez pas à nous contacter ou par MP !
 
 
 
 
Partenaires

Hébergement Web