scalafx.event.EventTarget.scala Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2014, ScalaFX Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the ScalaFX Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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package scalafx.event
import javafx.{event => jfxe}
import scala.language.implicitConversions
import scalafx.Includes._
import scalafx.delegate.SFXDelegate
object EventTarget {
implicit def sfxEventTarget2jfx(v: EventTarget): jfxe.EventTarget = if (v != null) v.delegate else null
}
/**
* Wraps a $JFX $URL0 $FC]].
*
* @define FC EventTarget
* @define URL0 [[https://docs.oracle.com/javase/8/javafx/api/javafx/event/EventTarget.html
* @define JFX JavaFX
* @define ORIGINALDOC Original Documentation]].
*/
abstract class EventTarget(override val delegate: jfxe.EventTarget)
extends SFXDelegate[jfxe.EventTarget] {
/**
* Construct an event dispatch chain for this target. The event dispatch
* chain contains event dispatchers which might be interested in processing
* of events targeted at this `EventTarget`. This event target is
* not automatically added to the chain, so if it wants to process events,
* it needs to add an `EventDispatcher` for itself to the chain.
*
* In the case the event target is part of some hierarchy, the chain for it
* is usually built from event dispatchers collected from the root of the
* hierarchy to the event target.
*
* The event dispatch chain is constructed by modifications to the provided
* initial event dispatch chain. The returned chain should have the initial
* chain at its end so the dispatchers should be prepended to the initial
* chain.
*
* The caller shouldn't assume that the initial chain remains unchanged nor
* that the returned value will reference a different chain.
*
* @param tail the initial chain to build from
* @return the resulting event dispatch chain for this target
* @see $URL0#buildEventDispatchChain $ORIGINALDOC
*/
def buildEventDispatchChain(tail: EventDispatchChain): EventDispatchChain =
delegate.buildEventDispatchChain(tail)
}