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 classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
QSignalEmitter.AbstractSignal, QSignalEmitter.PrivateSignal0, QSignalEmitter.PrivateSignal1, QSignalEmitter.PrivateSignal2, QSignalEmitter.PrivateSignal3, QSignalEmitter.PrivateSignal4, QSignalEmitter.PrivateSignal5, QSignalEmitter.PrivateSignal6, QSignalEmitter.PrivateSignal7, QSignalEmitter.PrivateSignal8, QSignalEmitter.PrivateSignal9, 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 |
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
currentSender |
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 |
QItemEditorCreatorBase
public QItemEditorCreatorBase()
- This is an overloaded method provided for convenience.
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()
.