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clapper/doc/reference/clapper/reactable-enhancers.md
2025-08-07 22:35:38 +02:00

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Title: Reactable Enhancers
Slug: reactable-enhancers
### Overview
[iface@Clapper.Reactable] is an interface to implement enhancers that react to the
playback and/or events that should influence it.
Such enhancer can work not only in a way that triggers external actions due to some
playback events, but also in reverse - alters playback or its queue due to some
external event. It can do so by getting a hold of the player that given enhancer
instance reacts to with [method@Clapper.Reactable.get_player].
For the basics about writing enhancers see [Clapper Enhancers](clapper-enhancers.html).
### Requirements
An enhancer of this type should implement any of the [iface@Clapper.Reactable] virtual
methods that it needs.
Note that when implementing [vfunc@Clapper.Reactable.queue_item_removed] you probably
also want to implement [vfunc@Clapper.Reactable.queue_cleared] as the former is not
called for each item when clearing the whole queue for performance reasons.