108 lines
2.2 KiB
Vue
108 lines
2.2 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 { useWindowSize } from '@vueuse/core';
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import Konva from 'konva/lib';
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import { onMounted, ref } from 'vue';
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import { Stage } from 'konva/lib/Stage';
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const { width, height } = useWindowSize();
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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 Konva.Stage({ container: 'container', width: width.value, height: height.value });
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const layer = new Konva.Layer();
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stage.value.add(layer);
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zoomed();
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// 绘制形状
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const rect = new Konva.Rect({
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x: 160,
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y: 60,
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width: 160,
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height: 90,
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fill: 'red',
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name: 'rect',
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stroke: 'black',
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draggable: true,
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});
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layer.add(rect);
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// 绘制文字
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const text = new Konva.Text({ x: 5, y: 5 });
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layer.add(text);
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const tr = new Konva.Transformer();
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layer.add(tr);
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tr.nodes([rect]);
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// 发生变化时
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rect.on('transformstart', function () {
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console.log('变化。。。');
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});
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// 拖拽移动
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rect.on('dragmove', function () {
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updateText();
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});
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rect.on('transform', function () {
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updateText();
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console.log('transform');
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});
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rect.on('transformend', function () {
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console.log('transform end');
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});
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function updateText() {
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const lines = [
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'x: ' + rect.x(),
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'y: ' + rect.y(),
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'rotation: ' + rect.rotation(),
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'width: ' + rect.width(),
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'height: ' + rect.height(),
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'scaleX: ' + rect.scaleX(),
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'scaleY: ' + rect.scaleY(),
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];
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text.text(lines.join('\n'));
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}
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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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