108 lines
2.5 KiB
Vue
108 lines
2.5 KiB
Vue
<template>
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<div class="container">
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<button class="btn btn-primary" type="button" @click="onRemoveEvent">移出事件</button>
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</div>
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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 { useWindowSize } from '@vueuse/core';
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import { onMounted, ref } from 'vue';
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import Konva from 'konva/lib';
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import { Text } from 'konva/lib/shapes/Text';
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import { Circle } from 'konva/lib/shapes/Circle';
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import { Stage } from 'konva/lib/Stage';
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const { width, height } = useWindowSize();
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const circle = ref<Circle>();
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const text = ref<Text>();
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const count = ref(0);
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const stage = ref<Stage>();
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const SCALE_BY = 1.1;
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/**
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* * 缩放
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*/
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const zoomed = () => {
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stage.value?.on('wheel', ev => {
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if (!stage.value) {
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return;
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}
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// 之前缩放比例
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const oldScaleX = stage.value?.scaleX();
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const oldScaleY = stage.value?.scaleY();
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const pointer = stage.value?.getPointerPosition();
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const mousePointTo = {
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x: (pointer!.x - stage.value?.x()) / oldScaleX,
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y: (pointer!.y - stage.value?.y()) / oldScaleY,
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};
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// 判断鼠标是向上滚动还是向下滚动和
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const direction = ev.evt.deltaY > 0 ? -1 : 1;
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// 设置新的缩放比例
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const newScaleX = direction > 0 ? oldScaleX * SCALE_BY : oldScaleX / SCALE_BY;
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const newScaleY = direction > 0 ? oldScaleY * SCALE_BY : oldScaleY / SCALE_BY;
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stage.value?.scale({ x: newScaleX, y: newScaleY });
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// 设置鼠标位置保持不变
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const newPosition = {
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x: pointer!.x - mousePointTo.x * newScaleX,
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y: pointer!.y - mousePointTo.y * newScaleY,
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};
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stage.value!.position(newPosition);
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});
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};
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const initial = () => {
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stage.value = new Konva.Stage({ container: 'container', width: width.value, height: height.value });
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const layer = new Konva.Layer({ draggable: true });
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// 添加文字
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text.value = new Konva.Text({
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x: 10,
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y: 10,
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fontFamily: 'Calibri',
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fontSize: 20,
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text: '',
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fill: 'black',
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});
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layer.add(text.value);
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// 添加圆形
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circle.value = new Konva.Circle({
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x: stage.value.width() / 2,
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y: stage.value.height() / 2 + 10,
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radius: 70,
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fill: 'green',
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stroke: 'black',
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strokeWidth: 4,
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duration: 1,
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});
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layer.add(circle.value);
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// 添加事件
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circle.value?.on('click', function () {
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circle.value?.radius(80);
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text.value?.text(`点击了：${count.value}`);
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count.value++;
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});
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stage.value.add(layer);
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zoomed();
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};
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// 移出点击事件
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const onRemoveEvent = () => {
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circle.value?.off('click');
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text.value?.text('移出事件');
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};
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onMounted(() => {
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initial();
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});
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</script>
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