info.laht.threekt.input.PeripheralsEventSource.kt Maven / Gradle / Ivy

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Port of the three.js 3D javascript library for Kotlin/JVM

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package info.laht.threekt.input

import info.laht.threekt.WindowSize

interface PeripheralsEventSource {

    val size: WindowSize

    fun addKeyListener(listener: KeyListener)

    fun removeKeyListener(listener: KeyListener): Boolean

    fun addMouseListener(listener: MouseListener)

    fun removeMouseListener(listener: MouseListener): Boolean

}

abstract class AbstractPeripheralsEventSource : PeripheralsEventSource {

    protected var keyListeners: MutableList? = null
    protected var mouseListeners: MutableList? = null

    override fun addKeyListener(listener: KeyListener) {
        keyListeners?.add(listener) ?: run {
            keyListeners = mutableListOf(listener)
        }
    }

    override fun addMouseListener(listener: MouseListener) {
        mouseListeners?.add(listener) ?: run {
            mouseListeners = mutableListOf(listener)
        }
    }

    override fun removeKeyListener(listener: KeyListener): Boolean {
        return keyListeners?.remove(listener) ?: false
    }

    override fun removeMouseListener(listener: MouseListener): Boolean {
        return mouseListeners?.remove(listener) ?: false
    }

}