swingeventhandling.pdf

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623005238 UNPDF
GUI Event Handling
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Topics
• The Delegation Event Model
• Event Classes
• Event Listeners
> ActionListener Method
> MouseListener Methods
> MouseMotionListener Methods
> WindowListener Methods
• Steps for Creating GUI Applications with
Event Handling
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Delegation Event Model
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What is Delegation Event Model?
• The Delegation Event Model
> Model used by Java to handle user interaction
with GUI components
> Describes how your program can respond to user
interaction
• Three important players
> Event Source
> Event Listener/Handler
> Event Object
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Event Source, Event Listener/Handler
• Event Source
> GUI component that generates the event
> Example: button
• Event Listener/Handler
> Receives and handles events
> Contains business logic
> Example: displaying information useful to the
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user, computing a value
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