Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## com.trolltech.qt.gui
Class QItemEditorCreatorBase

    java.lang.Object
      com.trolltech.qt.internal.QSignalEmitterInternal
          com.trolltech.qt.QSignalEmitter
              com.trolltech.qt.QtJambiObject
                  com.trolltech.qt.gui.QItemEditorCreatorBase

All Implemented Interfaces:
  QtJambiInterface

Direct Known Subclasses:
  QItemEditorCreator, QStandardItemEditorCreator

    public abstract class QItemEditorCreatorBase

extends QtJambiObject

The QItemEditorCreatorBase class provides an abstract base class that must be subclassed when implementing new item editor creators. QItemEditorCreatorBase objects are specialized widget factories that provide editor widgets for one particular `QVariant` data type. They are used by `QItemEditorFactory` to create editors for `QItemDelegate`s. Creator bases must be registered with `QItemEditorFactory::registerEditor()`.

An editor should provide a user property for the data it edits. QItemDelagates can then access the property using Qt's meta-object system to set and retrieve the editing data. A property is set as the user property with the USER keyword:

        @QtPropertyReader
        @QtPropertyUser
        public QColor color() { return color; }

        @QtPropertyWriter
        public void setColor(QColor color) { this.color = color; }

If the editor does not provide a user property, it must return the name of the property from `valuePropertyName()`; delegates will then use the name to access the property. If a user property exists, item delegates will not call `valuePropertyName()`.

`QStandardItemEditorCreator` is a convenience template class that can be used to register widgets without the need to subclass QItemEditorCreatorBase.

See also:
  `QStandardItemEditorCreator`, `QItemEditorFactory`, Model/View Programming, and Color Editor Factory Example.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
`QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9`

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal`

Field Summary

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`currentSender`

Constructor Summary
`QItemEditorCreatorBase()`

Method Summary
`abstract QWidget` | `createWidget(QWidget parent)` Returns an editor widget with the given `parent`.
`abstract QByteArray` | `valuePropertyName()` Returns the name of the property used to get and set values in the creator's editor widgets.

Methods inherited from class com.trolltech.qt.QtJambiObject
`dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr`

Methods inherited from class com.trolltech.qt.QSignalEmitter
`blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread`

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`__qt_signalInitialization`

Methods inherited from class java.lang.Object
`clone, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface com.trolltech.qt.QtJambiInterface
`disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership`

Constructor Detail

### QItemEditorCreatorBase

    public QItemEditorCreatorBase()

Method Detail

### createWidget

    public abstract QWidget createWidget(QWidget parent)

  Returns an editor widget with the given `parent`.

  When implementing this function in subclasses of this class, you must construct and return new editor widgets with the parent widget specified.

### valuePropertyName

    public abstract QByteArray valuePropertyName()

  Returns the name of the property used to get and set values in the creator's editor widgets.

  When implementing this function in subclasses, you must ensure that the editor widget's property specified by this function can accept the type the creator is registered for. For example, a creator which constructs `QCheckBox` widgets to edit boolean values would return the `checkable` property name from this function, and must be registered in the item editor factory for the `QVariant::Bool` type.

  Note: Since Qt 4.2 the item delegates query the user property of widgets, and only call this function if the widget has no user property. You can override this behavior by reimplementing `QAbstractItemDelegate::setModelData()` and `QAbstractItemDelegate::setEditorData()`.

See also:
  QMetaObject::userProperty(), and `QItemEditorFactory::registerEditor()`.

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD