Since: BlackBerry 10.0.0
Abstract base class inherited by all resource trackers.
A resource tracker is used to access the asynchronous features of resources, such as the state. All resources have a state that can be accessed, but some resources (for example, Image) also have details about the size which can be accessed. Trackers also have signals that are emitted when a state or other property is updated.
Public Functions Index
Protected Functions Index
Only has inherited protected functions
|BaseObject (QObject *parent=0)|
The current state for the resource.
Default state is Unknown.
When the state changes, the stateChanged() signal will be emitted.
This property is overridden from QObject.
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.
Determines whether the resource is in one of the error states.
true if the image is in any error state, false otherwise.
Returns the current resource state.
Current resource state.
Sets the objectName property.
The new name for the object.
virtual Q_INVOKABLE QString
Returns a debug string representing this object.
A debug string for the object.
(Only has inherited protected functions)
Constructs an instance of BaseObject's subclass.
An optional parent, defaults to 0.
Emitted when the state is changed for this resource.
Due to a work around for a Qt Core issue with accessing enums from QML, the argument of this signal doesn't follow naming convention for signals in which the signal arguments are typically named to match the associated property's name. Use the object's property to access current property value instead of the signal argument to avoid runtime errors (i.e. use state instead of newState).
The new state.
This signal is emitted only when this object is instantiated as a result of loading a QML document and creating the root node, or when an object is being constructed using its builder class.
This signal is emitted only 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 is emitted to indicate 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.