MATLAB Object-Oriented Programming

These events have public listen access (ListenAccess attribute) and private notify

access (NotifyAccess attribute).

The PropertyAdded and PropertyRemoved events pass an

event.DynamicPropertyEvent object to listener callbacks. The event data object has

three properties:

• PropertyName — Name of the dynamic property that is added or removed


• Source — Handle to the object that is the source of the event


• EventName — Name of the event (PropertyAdded, PropertyRemoved, or
  ObjectBeingDestroyed)

Listen for a Specific Property Name

Suppose that you have an application that creates a dynamic property under certain

conditions. You want to:

• Set the value of a hidden property to true when a property named SpecialProp is
  added.


• Set the value of the hidden property to false when SpecialProp is removed.

Use the event.DynamicPropertyEvent event data to determine the name of the

property and whether it is added or deleted.

The DynamTest class derives from dynamicprops. It defines a hidden property,

HiddenProp.

classdef DynamTest < dynamicprops

properties (Hidden)

HiddenProp

end

end

Define a callback function that uses the EventName property of the event data to

determine if a property is added or removed. Obtain the name of the property from the

PropertyName property of the event data. If a dynamic property is named

SpecialProp, change the value of the hidden property.

function DyPropEvtCb(src,evt)

switch evt.EventName

case 'PropertyAdded'

8 Properties — Storing Class Data