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scripts default iconMagicListener (Scripts) Publisher's description

MagicListener constructor creates a listener just like the addlistener function

MagicListener constructor creates a listener just like the addlistener function. The difference is the constructor accepts one more input, one object or a cell of objects, and the life cycle of the returned object will be linked also on these objects.

Exemple:

Without MagicListener:

[Class1.m]
classdef Class1 < handle
events
myEvent
end
end

[Class2.m]
classdef Class2 < handle
methods
function this = Class2( obj1 )
addlistener( obj1, 'myEvent', @(H,E) this.callback() );
end
function callback( this )
disp( 'CALLBACK!' );
end
end
end

>> obj1 = Class1();
>> obj2 = Class2( obj1 );
>> notify( obj1, 'myEvent' );
CALLBACK!
>> delete( obj2 );
>> notify( obj1, 'myEvent' );
Warning: Error occurred while executing callback:
Invalid or deleted object.

With MagicListener:

[Class1.m]
classdef Class1 < handle
events
myEvent
end
end

[Class2.m]
classdef Class2 < handle
methods
function this = Class2( obj1 )
MagicListener( obj1, 'myEvent', @(H,E) this.callback(), this );
end
function callback( this )
disp( 'CALLBACK!' );
end
end
end

>> obj1 = Class1();
>> obj2 = Class2( obj1 );
>> notify( obj1, 'myEvent' );
CALLBACK!
>> delete( obj2 );
>> notify( obj1, 'myEvent' );

System Requirements:

MATLAB 7.7 (R2008b)
Program Release Status: New Release
Program Install Support: Install and Uninstall

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