CODEWITHSUNDEEP
javaswingqtpyqtsignals-slots
zaharpopov
zaharpopov

Reputation: 17272

Swing - replacement for Qt signal/slots

In Qt GUIs it is very convenient use signals & slots - it decouple events passing. When I create some widget that throw signal, I don't have to know in advance who can get it, and later with connect I specify connections.

What is parallel in Java/Swing? Can you point to good resources on this issue?

Upvotes: 6

Views: 3561

Answers (2)

trashgod
trashgod

Reputation: 205865

If none of the existing EventListener implementations meet your requirements, you can create your own custom event. Every JComponent contains a field of type EventListenerList. You can use the approach outlined in the EventListenerList API to enable your custom JComponent subclass to fire your custom event.

Regarding the signal/slot mechanism, Swing has several ways to implement the observer pattern, outlined here.

Upvotes: 5

Atreys
Atreys

Reputation: 3761

This Event Listener tutorial goes through the basics of handling events with listeners.

Connecting your slot for a signal is analogous to adding your EventListener to an event-producing object.

Upvotes: 1

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