82 lines
1.8 KiB
Vue
82 lines
1.8 KiB
Vue
<template>
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<div id="container"></div>
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</template>
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<script lang="ts" setup>
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import { Layer } from 'konva/lib/Layer';
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import { Image as KonvaImage } from 'konva/lib/shapes/Image';
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import { Stage } from 'konva/lib/Stage';
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import { nextTick, onMounted, ref } from 'vue';
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const stage = ref<Stage>();
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const SCALE_BY = 1.1;
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const zoomed = () => {
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stage.value?.on('wheel', ev => {
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if (!stage.value) return;
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const scaleX = stage.value?.scaleX();
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const scaleY = stage.value?.scaleY();
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const pointerPosition = stage.value?.getPointerPosition();
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const mousePointTo = {
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x: (pointerPosition!.x - stage.value?.x()) / scaleX,
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y: (pointerPosition!.y - stage.value?.y()) / scaleY,
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};
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const direction = ev.evt.deltaY > 0 ? -1 : 1;
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const x = direction > 0 ? scaleX * SCALE_BY : scaleX / SCALE_BY;
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const y = direction > 0 ? scaleY * SCALE_BY : scaleY / SCALE_BY;
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stage.value?.scale({ x, y });
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const position = {
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x: pointerPosition!.x - mousePointTo.x * x,
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y: pointerPosition!.y - mousePointTo.y * y,
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};
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stage.value?.position(position);
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});
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};
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const initial = () => {
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stage.value = new Stage({
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container: 'container',
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width: 500,
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height: 500,
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draggable: true,
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});
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const layer = new Layer({ draggable: true });
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zoomed();
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const imageObj = new Image();
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const konvaImage = new KonvaImage({
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x: 50,
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y: 5,
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image: imageObj,
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width: 100,
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height: 100,
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});
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imageObj.src = 'https://konvajs.org/assets/yoda.jpg';
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layer.add(konvaImage);
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konvaImage.cornerRadius(20);
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KonvaImage.fromURL('https://konvajs.org/assets/darth-vader.jpg', function (darthNode) {
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darthNode.setAttrs({
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x: 50,
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y: 160,
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scaleX: 0.5,
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scaleY: 0.5,
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cornerRadius: 20,
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});
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layer.add(darthNode);
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});
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stage.value.add(layer);
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};
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onMounted(() => {
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nextTick(() => {
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initial();
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});
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});
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</script>
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