Since: BlackBerry 10.0.0

#include <bb/cascades/BaseObject>

The base object for the classes in the framework.

This class can be used as a base for class exposed to QML or just any user class to be used with the framework.

The class exposes a parent property (which returns the current parent of the object as returned by QObject::parent()) and it provides a creationCompleted() signal that is emitted when the object's construction and configuration has been completed.

The signal is emitted when a class deriving from this class has been instantiated from QML or constructed using its builder class.


QML properties

objectName: QString
parent: QObject [read-only]

Properties Index

Public Functions Index

virtual ~BaseObject ()
voidsetObjectName (const QString &name)
virtual Q_INVOKABLE QStringtoDebugString () const

Protected Functions Index

BaseObject (QObject *parent=0)

Signals Index

voidcreationCompleted ()
voidobjectNameChanged (const QString &objectName)


QString objectName

This property is overridden from QObject.

See also:



BlackBerry 10.0.0

QObject parent[read-only]

A read-only property that represents this object's parent.

The parent of an object is specified using QObject::setParent(QObject*). The purpose of the property is to expose the object's parent to QML.

This property is read-only to prevent modifications from QML, where typically the parent is declaratively set. In C++ code, the parent can be explicitly set using QObject::setParent(QObject*), or implicitly set by adding it to a visual container.

The default value of this property is 0.


BlackBerry 10.0.0

Public Functions

virtual~BaseObject ()


void setObjectName (

Sets the objectName property.


The new name for the object.


BlackBerry 10.0.0

virtual Q_INVOKABLE QString toDebugString ()

Returns a debug string representing this object.


A debug string for the object.


BlackBerry 10.0.0

Protected Functions

BaseObject (

Constructs an instance of BaseObject's subclass.


An optional parent, defaults to 0.


BlackBerry 10.0.0


void creationCompleted ()

Emitted when this object is instantiated as a result of loading a QML document and creating the root node (only after the root component that caused this instantiation has completed construction), or when the object is being constructed from its builder class.

This signal indicates that the construction and initialization of the object has been completed, the properties are initialized, and any QML binding values have been assigned to the object.

This signal is not emitted when the object is constructed from C++ using the constructor. If the object is constructed using its builder class, the signal is emitted when the the builder class returns the fully constructed object.

This signal can be used when there is an activity that needs to be performed, such as a property state integrity verification after the object is instantiated from a QML document or a builder, but before control is returned to the application.

See also:



BlackBerry 10.0.0

void objectNameChanged (

This signal is emitted when the objectName property is changed.


BlackBerry 10.0.0

Last modified: 2015-03-26

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