commonMain.org.jetbrains.letsPlot.skia.shape.VisualProperty.kt Maven / Gradle / Ivy

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/*
 * Copyright (c) 2023 JetBrains s.r.o.
 * Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 */

package org.jetbrains.letsPlot.skia.shape

import kotlin.properties.ReadWriteProperty
import kotlin.reflect.KProperty

internal class VisualProperty(
    initialValue: T,
    private val onPropertyChanged: (KProperty<*>, T, T) -> Unit
) : ReadWriteProperty {
    private var value = initialValue
    var isDefault = true
        private set

    override fun getValue(thisRef: Any, property: KProperty<*>): T = value
    override fun setValue(thisRef: Any, property: KProperty<*>, value: T) = run {
        isDefault = false
        val oldValue = this.value
        this.value = value

        if (oldValue != value) {
            onPropertyChanged(property, oldValue, value)
        }
    }
}