OverallCanvas
This commit is contained in:
李志鹏
346
src/component/Canvas/OverallCanvas/demo.vue
Normal file
346
src/component/Canvas/OverallCanvas/demo.vue
Normal file
@@ -0,0 +1,346 @@
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<template>
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<div class="demo">
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<div
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class="control"
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:class="{ active: item.id === activeId }"
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v-for="(item, index) in list"
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:key="item.id"
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@click="onSelect(item.id)"
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>
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<div>
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<b>{{ item.name }}</b>
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<button
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v-if="index !== 0"
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@click="onMove(item.id, list[index - 1].id)"
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>
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←
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</button>
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<button
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v-if="index !== list.length - 1"
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@click="onMove(item.id, list[index + 1].id)"
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>
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→
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</button>
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<button @click.stop="onDelete(item.id)">删除</button>
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</div>
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<div>
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<span>偏移X</span>
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<input type="number" v-model="item.location[0]" />
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</div>
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<div>
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<span>偏移Y</span>
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<input type="number" v-model="item.location[1]" />
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</div>
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<div>
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<span>角度</span>
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<input type="number" v-model="item.angle" />
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</div>
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<div>
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<span>缩放</span>
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<input type="number" v-model="item.scale[0]" />
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</div>
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<div>
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<span>水平间距</span>
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<input type="number" v-model="item.object.gapX" />
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</div>
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<div>
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<span>垂直间距</span>
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<input type="number" v-model="item.object.gapY" />
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</div>
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<hr />
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<hr />
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<div>
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<span>缩放X</span>
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<input type="number" v-model="item.object.scaleX" step="0.1" />
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</div>
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<div>
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<span>缩放Y</span>
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<input type="number" v-model="item.object.scaleY" step="0.1" />
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</div>
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<div>
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<span>X</span>
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<input type="number" v-model="item.object.left" />
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</div>
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<div>
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<span>Y</span>
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<input type="number" v-model="item.object.top" />
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</div>
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<div>
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<span>角度</span>
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<input type="number" v-model="item.object.angle" />
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</div>
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<div>
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<span>透明度</span>
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<input
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type="range"
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v-model="item.object.opacity"
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step="0.1"
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min="0"
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max="1"
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/>
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</div>
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</div>
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<button @click="onAdd">添加</button>
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<div class="box">
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<pingpu
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:list="list"
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ref="pingpuRef"
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@change-canvas="updateCanvas"
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/>
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</div>
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</div>
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</template>
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<script lang="ts" setup>
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import { ref, onMounted, watch } from "vue";
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import pingpu from "./index.vue";
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const ACTIONS = {
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ADD: "add",
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UPDATE: "update",
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DELETE: "delete",
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SELECT: "select",
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SORT: "sort",
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};
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const convertDotNotationToBracket = (str) =>
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str.replace(/(?:^|\.)(\d+)(?=\.|$)/g, "[#$1]").replace(/\[#/g, "[");
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const activeId = ref("1");
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const list = ref([
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{
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id: "1",
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ifSingle: false,
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level2Type: "Pattern",
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designType: "Library",
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path: "/src/assets/images/canvas/yinhua1.jpg",
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location: [0, 0],
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scale: [1, 1],
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angle: 0,
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name: "Print1",
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priority: 1,
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object: {
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top: 0,
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left: 0,
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scaleX: 1,
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scaleY: 1,
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opacity: 1,
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angle: 0,
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flipX: false,
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flipY: false,
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blendMode: "multiply",
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gapX: 10,
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gapY: 20,
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},
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},
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{
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id: "2",
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ifSingle: false,
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level2Type: "Pattern",
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designType: "Library",
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path: "/src/assets/images/canvas/yinhua1.jpg",
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location: [0, 0],
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scale: [2, 2],
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angle: -45,
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name: "Print2",
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priority: 1,
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object: {
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top: 150,
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left: 250,
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scaleX: 0.5,
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scaleY: 0.5,
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opacity: 1,
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angle: 45,
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flipX: false,
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flipY: false,
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blendMode: "multiply",
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gapX: 0,
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gapY: 0,
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},
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},
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]);
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// 深拷贝
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const deepCopy = (obj) => JSON.parse(JSON.stringify(obj));
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const oldList = ref(deepCopy(list.value));
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const pingpuRef = ref(null);
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const updateCanvas = (arr) => {
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oldList.value = deepCopy(list.value);
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arr.forEach((item) => {
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list.value.forEach((v) => {
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if (item.action === ACTIONS.UPDATE) {
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if (v.id === item.id) {
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if (item.action === ACTIONS.UPDATE) {
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try {
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const key = item.key;
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const str = /^\[/.test(item.key)
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? "v" + key
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: "v." + key;
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eval(`${str} = item.value`);
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} catch (error) {
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console.error(error);
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}
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}
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}
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} else if (item.action === ACTIONS.SELECT) {
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activeId.value = item.id;
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}
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});
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});
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};
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const onSelect = (id) => {
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activeId.value = id;
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pingpuRef.value.updataList([
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{
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id: id,
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action: ACTIONS.SELECT,
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},
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]);
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};
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const onMove = (id, id2) => {
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const obj1 = list.value.find((v) => v.id === id);
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const obj2 = list.value.find((v) => v.id === id2);
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const index1 = list.value.indexOf(obj1);
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const index2 = list.value.indexOf(obj2);
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if (index1 < index2) {
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list.value.splice(index2, 0, list.value.splice(index1, 1)[0]);
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} else {
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list.value.splice(index1, 0, list.value.splice(index2, 1)[0]);
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}
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const ids = list.value.map((v) => v.id);
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pingpuRef.value.updataList([
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{
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action: ACTIONS.SORT,
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ids,
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},
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]);
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};
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const onDelete = (id) => {
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list.value = list.value.filter((v) => v.id !== id);
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pingpuRef.value.updataList([
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{
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id: id,
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action: ACTIONS.DELETE,
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},
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]);
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};
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const onAdd = () => {
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const obj = {
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id: Date.now().toString(),
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ifSingle: false,
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level2Type: "Pattern",
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designType: "Library",
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path: "/src/assets/images/canvas/yinhua1.jpg",
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location: [0, 0],
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scale: [1, 1],
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angle: 0,
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name: "Print" + (list.value.length + 1),
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priority: 1,
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object: {
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top: 0,
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left: 0,
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scaleX: 1,
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scaleY: 1,
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opacity: 1,
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angle: 0,
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flipX: false,
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flipY: false,
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blendMode: "multiply",
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gapX: 10,
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gapY: 20,
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},
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};
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list.value.push(obj);
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pingpuRef.value.updataList([
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{
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action: ACTIONS.ADD,
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data: obj,
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},
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]);
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};
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watch(
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() => list.value,
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() => updateList(),
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{ deep: true }
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);
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// 监听列表变化属性变更
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const updateList = () => {
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const changeList = [];
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oldList.value.forEach((oldItem) => {
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const newItem = list.value.find((v) => v.id === oldItem.id);
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if (newItem) {
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const arr = findDiffProps(oldItem, newItem);
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arr.forEach((item) => {
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changeList.push({
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...item,
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id: oldItem.id,
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action: ACTIONS.UPDATE,
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key: convertDotNotationToBracket(item.key),
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});
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});
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} else {
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changeList.push({
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id: oldItem.id,
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action: ACTIONS.DELETE,
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});
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}
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});
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oldList.value = deepCopy(list.value);
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if (changeList.length) {
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pingpuRef.value.updataList(changeList);
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}
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};
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// 递归查找不同的属性
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const findDiffProps = (obj1, obj2, diffProps = [], path = "") => {
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for (const key in obj1) {
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if (typeof obj1[key] === "object") {
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findDiffProps(obj1[key], obj2[key], diffProps, `${path}${key}.`);
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} else if (obj1[key] !== obj2[key]) {
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diffProps.push({
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key: `${path}${key}`,
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value: obj2[key],
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});
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}
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}
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return diffProps;
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};
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</script>
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<style lang='less' scoped>
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.demo {
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> .control {
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display: inline-block;
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border: 1px solid #000;
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padding: 10px;
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margin: 10px;
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border-radius: 10px;
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&.active {
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border-color: rgb(17, 68, 223);
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box-shadow: 0 0 5px rgb(17, 68, 223);
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}
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> div {
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display: flex;
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align-items: center;
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margin-bottom: 5px;
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> * {
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margin-right: 10px;
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&:last-child {
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margin-right: 0;
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}
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}
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> span {
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width: 80px;
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}
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> input:not([type="range"]) {
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padding-left: 10px;
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border-radius: 5px;
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}
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}
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}
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> .box {
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width: 400px;
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height: 500px;
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overflow: hidden;
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border: 1px solid #000;
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}
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}
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</style>
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304
src/component/Canvas/OverallCanvas/index.vue
Normal file
304
src/component/Canvas/OverallCanvas/index.vue
Normal file
@@ -0,0 +1,304 @@
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<template>
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<div class="pingpu" ref="el"><canvas ref="canvasRef"></canvas></div>
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</template>
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<script setup>
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import { fabric } from "fabric-with-all";
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import { ref, watch, onMounted } from "vue";
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const KEYS = {
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FILL_X: "location[0]",
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FILL_Y: "location[1]",
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FILL_ANGLE: "angle",
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FILL_SCALEX: "scale[0]",
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FILL_SCALEY: "scale[1]",
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FILL_GAPX: "object.gapX",
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FILL_GAPY: "object.gapY",
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O_TOP: "object.top",
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O_LEFT: "object.left",
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O_SCALE_X: "object.scaleX",
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O_SCALE_Y: "object.scaleY",
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O_OPACITY: "object.opacity",
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O_ANGLE: "object.angle",
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O_FLIPX: "object.flipX",
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O_FLIPY: "object.flipY",
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O_BLENDMODE: "object.blendMode",
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};
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const ACTIONS = {
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ADD: "add",
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SELECT: "select",
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UPDATE: "update",
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DELETE: "delete",
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SORT: "sort",
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};
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const emit = defineEmits(["change-canvas"]);
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const props = defineProps({
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list: { type: Array, default: () => [] },
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});
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const el = ref(null);
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const canvasRef = ref(null);
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const observer = ref(null);
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var canvas = null;
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onMounted(async () => {
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initCanvas();
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await setCanvasData();
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let throttleTimeout = null;
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let lastRunTime = 0;
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let trailingTimeout = null;
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observer.value = new ResizeObserver((entries) => {
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const now = Date.now();
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const throttleDelay = 100;
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if (!throttleTimeout) {
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updateCanvasSize();
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lastRunTime = now;
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throttleTimeout = setTimeout(() => {
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throttleTimeout = null;
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}, throttleDelay);
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} else {
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clearTimeout(trailingTimeout);
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trailingTimeout = setTimeout(() => {
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updateCanvasSize();
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lastRunTime = Date.now();
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}, throttleDelay);
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}
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});
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observer.value.observe(el.value);
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});
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onBeforeUnmount(() => {
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observer.value.disconnect();
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unbindEvent();
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});
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const initCanvas = () => {
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canvas = new fabric.Canvas(canvasRef.value, {
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selection: false,
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preserveObjectStacking: true,
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});
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canvas.setWidth(el.value.offsetWidth);
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canvas.setHeight(el.value.offsetHeight);
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bindEvent();
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};
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const updateCanvasSize = async () => {
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canvas.setWidth(el.value.offsetWidth);
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canvas.setHeight(el.value.offsetHeight);
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await setCanvasData();
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};
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// 绑定事件
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const bindEvent = () => {
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canvas.on("object:modified", onObjectModified);
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canvas.on("selection:created", onObjectSelected);
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canvas.on("selection:updated", onObjectSelected);
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};
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// 解绑事件
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const unbindEvent = () => {
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canvas.off("object:modified", onObjectModified);
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canvas.off("selection:created", onObjectSelected);
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canvas.off("selection:updated", onObjectSelected);
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};
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// 处理对象修改事件
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const onObjectModified = (e) => {
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console.log(e);
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const object = e.target;
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const action = e.action;
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const list = [];
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const id = object.id;
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if (action === "drag" || action === "rotate") {
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list.push({
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id: id,
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action: ACTIONS.UPDATE,
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key: KEYS.O_TOP,
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value: object.top,
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});
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list.push({
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id: id,
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action: ACTIONS.UPDATE,
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key: KEYS.O_LEFT,
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value: object.left,
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});
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if (action === "rotate") {
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list.push({
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id: id,
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action: ACTIONS.UPDATE,
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key: KEYS.O_ANGLE,
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value: object.angle,
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});
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}
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} else if (action === "scale") {
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list.push({
|
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id: id,
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||||
action: ACTIONS.UPDATE,
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key: KEYS.O_SCALE_X,
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value: object.scaleX,
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});
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list.push({
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id: id,
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action: ACTIONS.UPDATE,
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key: KEYS.O_SCALE_Y,
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value: object.scaleY,
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});
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}
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emit("change-canvas", list);
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};
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// 对象选中
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const onObjectSelected = (e) => {
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const id = e.selected[0].id;
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const list = [
|
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{
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||||
id: id,
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||||
action: ACTIONS.SELECT,
|
||||
},
|
||||
];
|
||||
emit("change-canvas", list);
|
||||
};
|
||||
const urlToCanvas = (url) => {
|
||||
return new Promise((resolve, reject) => {
|
||||
fabric.Image.fromURL(
|
||||
url,
|
||||
(object) => {
|
||||
const imgElement = object.getElement();
|
||||
// 创建透明 Canvas
|
||||
const tcanvas = document.createElement("canvas");
|
||||
tcanvas.width = imgElement.width;
|
||||
tcanvas.height = imgElement.height;
|
||||
const ctx = tcanvas.getContext("2d");
|
||||
ctx.clearRect(0, 0, tcanvas.width, tcanvas.height);
|
||||
ctx.drawImage(imgElement, 0, 0);
|
||||
resolve(tcanvas);
|
||||
},
|
||||
{ crossOrigin: "anonymous" }
|
||||
);
|
||||
});
|
||||
};
|
||||
const setCanvasData = async () => {
|
||||
canvas.clear();
|
||||
for (let i = 0; i < props.list.length; i++) {
|
||||
let item = props.list[i];
|
||||
await addObject(item);
|
||||
}
|
||||
canvas.renderAll();
|
||||
};
|
||||
const addObject = async (item) => {
|
||||
const cwidth = canvas.width;
|
||||
const cheight = canvas.height;
|
||||
let pattern = await setFill(item);
|
||||
let rect = new fabric.Rect({
|
||||
id: item.id,
|
||||
width: cwidth,
|
||||
height: cheight,
|
||||
fill: pattern,
|
||||
...item.object,
|
||||
});
|
||||
canvas.add(rect);
|
||||
};
|
||||
const setFill = async (item) => {
|
||||
if (!item) return null;
|
||||
const cwidth = canvas.width;
|
||||
const cheight = canvas.height;
|
||||
let image = await urlToCanvas(item.path);
|
||||
let offsetX = item.location[0];
|
||||
let offsetY = item.location[1];
|
||||
let scaleX = ((cwidth / image.width) * item.scale[0]) / 5;
|
||||
let scaleY = ((cheight / image.height) * item.scale[1]) / 5;
|
||||
let scale = cwidth > cheight ? scaleX : scaleY;
|
||||
let angle = item.angle;
|
||||
let gapX = item.object.gapX;
|
||||
let gapY = item.object.gapY;
|
||||
let patternTransform = fabric.util.composeMatrix({
|
||||
scaleX: scale,
|
||||
scaleY: scale,
|
||||
angle: angle,
|
||||
});
|
||||
// 创建透明 Canvas
|
||||
let tcanvas = document.createElement("canvas");
|
||||
tcanvas.width = image.width + gapX;
|
||||
tcanvas.height = image.height + gapY;
|
||||
let ctx = tcanvas.getContext("2d");
|
||||
ctx.clearRect(0, 0, tcanvas.width, tcanvas.height);
|
||||
ctx.drawImage(image, 0, 0);
|
||||
let pattern = new fabric.Pattern({
|
||||
source: tcanvas,
|
||||
repeat: "repeat",
|
||||
patternTransform,
|
||||
offsetX, // 水平偏移
|
||||
offsetY, // 垂直偏移
|
||||
});
|
||||
return pattern;
|
||||
};
|
||||
const updataList = async (list) => {
|
||||
const objects = canvas.getObjects();
|
||||
// list.forEach((item) => {
|
||||
for (let i = 0; i < list.length; i++) {
|
||||
let item = list[i];
|
||||
let object = objects.find((o) => o.id === item.id);
|
||||
if (item.action === ACTIONS.UPDATE) {
|
||||
let value = item.value;
|
||||
switch (item.key) {
|
||||
case KEYS.O_TOP:
|
||||
object.set("top", value);
|
||||
break;
|
||||
case KEYS.O_LEFT:
|
||||
object.set("left", value);
|
||||
break;
|
||||
case KEYS.O_OPACITY:
|
||||
object.set("opacity", value);
|
||||
break;
|
||||
case KEYS.O_SCALE_X:
|
||||
object.set("scaleX", value);
|
||||
break;
|
||||
case KEYS.O_SCALE_Y:
|
||||
object.set("scaleY", value);
|
||||
break;
|
||||
case KEYS.O_ANGLE:
|
||||
object.set("angle", value);
|
||||
break;
|
||||
case KEYS.O_FLIPX:
|
||||
object.set("flipX", value);
|
||||
break;
|
||||
case KEYS.O_FLIPY:
|
||||
object.set("flipY", value);
|
||||
break;
|
||||
case KEYS.O_BLENDMODE:
|
||||
object.set("blendMode", value);
|
||||
break;
|
||||
case KEYS.FILL_X:
|
||||
case KEYS.FILL_Y:
|
||||
case KEYS.FILL_ANGLE:
|
||||
case KEYS.FILL_SCALEX:
|
||||
case KEYS.FILL_SCALEY:
|
||||
case KEYS.FILL_GAPX:
|
||||
case KEYS.FILL_GAPY:
|
||||
let pattern = await setFill(
|
||||
props.list.find((v) => v.id === item.id)
|
||||
);
|
||||
object.set("fill", pattern);
|
||||
break;
|
||||
}
|
||||
} else if (item.action === ACTIONS.SELECT) {
|
||||
canvas.setActiveObject(object);
|
||||
} else if (item.action === ACTIONS.SORT) {
|
||||
let ids = item.ids;
|
||||
canvas.clear();
|
||||
for (let j = 0; j < ids.length; j++) {
|
||||
let id = ids[j];
|
||||
let object = objects.find((o) => o.id === id);
|
||||
canvas.add(object);
|
||||
}
|
||||
canvas.renderAll();
|
||||
} else if (item.action === ACTIONS.DELETE) {
|
||||
canvas.remove(object);
|
||||
} else if (item.action === ACTIONS.ADD) {
|
||||
await addObject(item.data);
|
||||
}
|
||||
}
|
||||
canvas.renderAll();
|
||||
};
|
||||
defineExpose({
|
||||
updataList,
|
||||
});
|
||||
</script>
|
||||
|
||||
<style lang='less' scoped>
|
||||
.pingpu {
|
||||
width: 100%;
|
||||
height: 100%;
|
||||
}
|
||||
</style>
|
||||
Reference in New Issue
Block a user