Vue implements div wheel zooming in and out

Vue implements div wheel zooming in and out

Implement div wheel zooming in and out in Vue project, drag effect, similar to canvas effect

1. Import the vue-draggable-resizable plug-in and click here to enter the GitHub address.

1), npm install --save vue-draggable-resizable
2) In the main.js file

import VueDraggableResizable from 'vue-draggable-resizable'
import 'vue-draggable-resizable/dist/VueDraggableResizable.css'
Vue.component('vue-draggable-resizable', VueDraggableResizable)

3) Use in vue file

main.js:

import Vue from 'vue'
import App from './App'
import router from './router'
Vue.config.productionTip = false

// iview
import ViewUI from 'view-design';
import 'view-design/dist/styles/iview.css';
Vue.use(ViewUI)

// Drag, zoom, canvas plugin import VueDraggableResizable from 'vue-draggable-resizable'
import 'vue-draggable-resizable/dist/VueDraggableResizable.css'
Vue.component('vue-draggable-resizable', VueDraggableResizable)

new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})

vue file: Just focus on introducing the vue-draggable-resizable component configuration item and the handleTableWheel and tableZoom methods.

<template>
    <div class="is">
        <div
            style="height: 800px; width: 100%; border: 1px solid #000; position: relative; overflow: hidden;"
        >
            <!-- Import components. :lock-aspect-ratio="true": lock aspect ratio:resizable="false": non-scalable -->
            <vue-draggable-resizable
                w="auto"
                h="auto"
                :grid="[20,40]"
                :x="10"
                :y="10"
                :resizable="false"
            >
                <div class="table" ref="table" @wheel.prevent="handleTableWheel($event)">
                 <-- iview table, doesn't matter, any div will do -->
                    <Table
                        :columns="columns1"
                        :data="data1"
                        size="small"
                        :disabled-hover="true"
                        border
                    >
                        <template slot-scope="{ row, index }" slot="name">
                            <Tooltip :content="row.name" placement="top" transfer>
                                <span class="name" @click="handleCellClick(row)">{{ row.name }}</span>
                            </Tooltip>
                        </template>
                    </Table>
                </div>
            </vue-draggable-resizable>
        </div>
    </div>
</template>

<script>
import VueDraggableResizable from "vue-draggable-resizable";
export default {
    name: "is",
    data() {
        return {
            columns1: [
                {
                    title: "Name",
                    slot: "name",
                    width: 120
                },
                {
                    title: "Age",
                    key: "age",
                    width: 120
                },
                {
                    title: "Address",
                    key: "address",
                    width: 120
                },
                {
                    title: "Name",
                    key: "name",
                    width: 120
                },
                {
                    title: "Age",
                    key: "age",
                    width: 120
                },
                {
                    title: "Address",
                    key: "address",
                    width: 120
                },
                {
                    title: "Name",
                    key: "name",
                    width: 120
                },
                {
                    title: "Age",
                    key: "age",
                    width: 120
                },
                {
                    title: "Address",
                    key: "address",
                    width: 120
                }
            ],
            data1: [
                {
                    name: "John Brown",
                    age: 18,
                    address: "New York No. 1 Lake Park"
                },
                {
                    name: "Jim Green",
                    age: 25,
                    address: "London No. 1 Lake Park",
                    cellClassName: {
                        age: "demo-table-info-cell-age",
                        address: "demo-table-info-cell-address"
                    }
                },
                {
                    name: "Joe Black",
                    age: 30,
                    address: "Sydney No. 1 Lake Park"
                },
                {
                    name: "Jon Snow",
                    age: 26,
                    address: "Ottawa No. 2 Lake Park",
                    cellClassName: {
                        name: "demo-table-info-cell-name"
                    }
                },
                {
                    name: "John Brown",
                    age: 18,
                    address: "New York No. 1 Lake Park"
                },
                {
                    name: "Jim Green",
                    age: 25,
                    address: "London No. 1 Lake Park",
                    cellClassName: {
                        age: "demo-table-info-cell-age",
                        address: "demo-table-info-cell-address"
                    }
                },
                {
                    name: "Joe Black",
                    age: 30,
                    address: "Sydney No. 1 Lake Park"
                },
                {
                    name: "Jon Snow",
                    age: 26,
                    address: "Ottawa No. 2 Lake Park",
                    cellClassName: {
                        name: "demo-table-info-cell-name"
                    }
                }
            ]
        };
    },
    mounted() {},
    methods: {
        handleTableWheel(event) {
            let obj = this.$refs.table;
            return this.tableZoom(obj, event);
        },
        tableZoom(obj, event) {
            // The default is 100% at the beginning
            let zoom = parseInt(obj.style.zoom, 10) || 100;
            //Roll the wheel once and the value of wheelDelta increases or decreases by 120
            zoom += event.wheelDelta / 12;
            if (zoom > 0) {
                obj.style.zoom = zoom + "%";
            }
            return false;
        },
        // Click cell event (used to test whether dragging blocks the table's default event, which is irrelevant)
        handleCellClick(row) {
            this.$Message.info("You clicked" + row.name);
        }
    }
};
</script>

<style scoped lang="less">
.is {
    .table {
        .name {
            cursor: pointer;
        }
    }
}
// iview table style: just copy from iview official website, it doesn't matter/deep/ .ivu-table {
    .demo-table-info-row td {
        background-color: #2db7f5;
        color: #fff;
    }
    td.demo-table-info-column {
        background-color: #2db7f5;
        color: #fff;
    }
    .demo-table-error-row td {
        background-color: #ff6600;
        color: #fff;
    }
    .demo-table-info-cell-name {
        background-color: #2db7f5;
        color: #fff;
    }
    .demo-table-info-cell-age {
        background-color: #ff6600;
        color: #fff;
    }
    .demo-table-info-cell-address {
        background-color: #187;
        color: #fff;
    }
}
// Remove the div border in the canvas.vdr {
    border: none;
}
</style>

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

You may also be interested in:
  • Vue implements zoom in, zoom out and drag function
  • Vue uses svg files to supplement -svg zoom in and out operations (using d3.js)
  • Vue.js+Echarts development chart zoom in and out function example
  • Detailed explanation of the use of Vue image drag and drop zoom component

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