QItemEditorCreatorBase¶
The
QItemEditorCreatorBase
class provides an abstract base class that must be subclassed when implementing new item editor creators. More…
Detailed Description¶
QItemEditorCreatorBase
objects are specialized widget factories that provide editor widgets for one particularQVariant
data type. They are used byQItemEditorFactory
to create editors forQStyledItemDelegate
s. Creator bases must be registered withregisterEditor()
.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:
Q_PROPERTY(QColor color READ color WRITE setColor USER true)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 callvaluePropertyName()
.
QStandardItemEditorCreator
is a convenience template class that can be used to register widgets without the need to subclassQItemEditorCreatorBase
.See also
QStandardItemEditorCreator
QItemEditorFactory
Model/View Programming Color Editor Factory Example
- class PySide2.QtWidgets.QItemEditorCreatorBase¶
- PySide2.QtWidgets.QItemEditorCreatorBase.createWidget(parent)¶
- Parameters:
parent –
PySide2.QtWidgets.QWidget
- Return type:
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.
- PySide2.QtWidgets.QItemEditorCreatorBase.valuePropertyName()¶
- Return type:
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 thecheckable
property name from this function, and must be registered in the item editor factory for theBool
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
setModelData()
andsetEditorData()
.See also
userProperty()
registerEditor()
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