<script setup lang="ts">
import { useWindowSize } from '@vueuse/core';
import { onMounted } from 'vue';
import Konva from 'konva/lib';

const { width, height } = useWindowSize();

const initial = () => {
	const stage = new Konva.Stage({ container: 'container', width: width.value, height: height.value });
	stage.draggable(true);
	const layer = new Konva.Layer();
	stage.add(layer);

	const greenBox = new Konva.Rect({
		x: 70,
		y: stage.height() / 2,
		width: 100,
		height: 50,
		fill: 'green',
		stroke: 'black',
		strokeWidth: 4,
		offset: {
			x: 50,
			y: 25,
		},
	});

	const blueBox = new Konva.Rect({
		x: 190,
		y: stage.height() / 2,
		width: 100,
		height: 50,
		fill: 'blue',
		stroke: 'black',
		strokeWidth: 4,
		offset: {
			x: 50,
			y: 25,
		},
	});

	const redBox = new Konva.Rect({
		x: 310,
		y: stage.height() / 2,
		width: 100,
		height: 50,
		fill: 'red',
		stroke: 'black',
		strokeWidth: 4,
		offset: {
			x: 50,
			y: 25,
		},
	});
	layer.add(greenBox);
	layer.add(blueBox);
	layer.add(redBox);

	// the tween has to be created after the node has been added to the layer
	greenBox.tween = new Konva.Tween({
		node: greenBox,
		scaleX: 2,
		scaleY: 1.5,
		easing: Konva.Easings.EaseIn,
		duration: 1,
	});

	blueBox.tween = new Konva.Tween({
		node: blueBox,
		scaleX: 2,
		scaleY: 1.5,
		easing: Konva.Easings.EaseInOut,
		duration: 1,
	});

	redBox.tween = new Konva.Tween({
		node: redBox,
		scaleX: 2,
		scaleY: 1.5,
		easing: Konva.Easings.EaseOut,
		duration: 1,
	});

	// use event delegation
	layer.on('mouseover touchstart', function (evt) {
		evt.target.tween.play();
	});

	layer.on('mouseout touchend', function (evt) {
		evt.target.tween.reverse();
	});
};

onMounted(() => {
	initial();
});
</script>

<template>
	<div id="container"></div>
</template>

<style scoped lang="scss"></style>
