commonMain.CircleElement.kt Maven / Gradle / Ivy

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A collection of drawing/charting utilities

There is a newer version: 0.19.1

package com.juul.krayon.element

import com.juul.krayon.kanvas.Kanvas
import com.juul.krayon.kanvas.Paint
import com.juul.krayon.kanvas.Path

public class CircleElement : InteractableElement() {

    override val tag: String get() = "circle"

    public var centerX: Float by attributes.withDefault { 0f }
    public var centerY: Float by attributes.withDefault { 0f }
    public var radius: Float by attributes.withDefault { 0f }
    public var paint: Paint by attributes.withDefault { DEFAULT_FILL }

    override fun draw(kanvas: Kanvas) {
        kanvas.drawCircle(centerX, centerY, radius, paint)
    }

    override fun getInteractionPath(): Path = Path {
        val left = centerX - radius
        val top = centerY - radius
        val right = centerX + radius
        val bottom = centerY + radius
        arcTo(left, top, right, bottom, 0f, 180f, forceMoveTo = false)
        arcTo(left, top, right, bottom, 180f, 180f, forceMoveTo = false)
    }

    public companion object : ElementBuilder, ElementSelector {
        override fun build(): CircleElement = CircleElement()

        override fun trySelect(element: Element): CircleElement? = element as? CircleElement
    }
}