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Vue+Echart实现利用率表盘效果的示例代码

作者:老丹丘

这篇文章主要为大家详细介绍了Vue如何利用Echart实现利用率表盘的效果,文中的示例代码讲解详细,具有一定的借鉴价值,需要的可以参考一下

效果演示

组件

里面对应两个图片资源,panelBackground_red.png 和 panelBackground_green.png,请前往百度网盘进行下载。如果喜欢其他颜色,可以使用.psd来修改导出就行。

链接: https://pan.baidu.com/s/1BmupspRch3aPcqY7l01WYA 提取码: t3ur

在使用组件之前,记得引入echart组件,可以参考echart组件引入

<template>
    <!-- <div class="titleDiv">占用率</div> -->
    <div id="customGaugeContainer" ref="panel" style="height: 100%;"></div>
</template>

<script>
import * as echarts from 'echarts'

var app = {};
var ROOT_PATH = 'https://echarts.apache.org/examples';
// var _panelImageURL = ROOT_PATH + '/data/asset/img/custom-gauge-panel.png';
var _panelImageURL = require("@/assets/panel/panelBackground_green.png");
var _animationDuration = 1000;
var _animationDurationUpdate = 1000;
var _animationEasingUpdate = 'quarticInOut';
//这个不改
var _valOnRadianMax = 100;
//这个不改
var _pointerInnerRadius = 60;
//外轮廓半径
var _outerRadius = 110;
//内轮廓半径
var _innerRadius = 100;
//里面白色远的半径
var _insidePanelRadius = 100;
var _fontSize = 50;
var _currentDataIndex = 0;
var _shadowColor = '#20A53A';
var _textColor = '#20A53A';
var _shadowBlur = 20;

export default {
    name: 'SmartSchedulingSystemCustomGauge',
    props: {
        rate: {
            type: Number
        },
        timeChange: {
            type: Number
        }
    },

    watch: {
        rate: {
            handler(newValue, oldValue) {
                // console.log("刷新表盘数据")
                // console.log("oldValue:" + oldValue)
                // console.log("newValue:" + newValue)
                // console.log("rate:" + this.rate)
                //刷新表盘数据
                this.setOptions();
            },
            deep: true
        },
    },

    data() {
        return {
            myChart: undefined,
            scheduledTask: undefined,
        };
    },

    mounted() {
        this.$nextTick(() => {
            this.initChart();
            window.addEventListener('resize', this.myChart.resize());
            // this.setScheduledTask();
        })
    },

    methods: {
        initChart() {
            let dom = document.getElementById('customGaugeContainer');
            let clientHeight = dom.clientHeight;
            // console.log("clientHeight:" + clientHeight)
            _outerRadius = (clientHeight / 2) * 0.9;
            _innerRadius = (clientHeight / 2) * 0.8;
            _insidePanelRadius = (clientHeight / 2) * 0.8;
            _fontSize = (clientHeight / 2) * 0.3;
            _shadowBlur = (clientHeight / 2) * 0.2;

            // this.myChart = echarts.init(dom, null, {
            //     renderer: 'canvas',
            //     useDirtyRect: false
            // });
            this.myChart = echarts.init(this.$refs.panel);
            this.setOptions();
        },
        setOptions() {
            if (this.rate > 80) {
                _shadowColor = '#F33333';
                _textColor = '#F33333';
                _panelImageURL = require("@/assets/panel/panelBackground_red.png");
            } else {
                _shadowColor = '#20A53A';
                _textColor = '#20A53A';
                _panelImageURL = require("@/assets/panel/panelBackground_green.png");
            }
            let option = {
                animationEasing: _animationEasingUpdate,
                animationDuration: _animationDuration,
                animationDurationUpdate: _animationDurationUpdate,
                animationEasingUpdate: _animationEasingUpdate,
                //数据展示
                dataset: {
                    //100可以看成是百分比
                    source: [[1, this.rate]]
                },
                tooltip: {},
                angleAxis: {
                    type: 'value',
                    startAngle: 0,
                    show: false,
                    min: 0,
                    max: _valOnRadianMax
                },
                radiusAxis: {
                    type: 'value',
                    show: false
                },
                polar: {},
                series: [
                    {
                        type: 'custom',
                        coordinateSystem: 'polar',
                        renderItem: renderItem
                    }
                ]
            };

            if (option && typeof option === 'object') {
                this.myChart.setOption(option);
            }
        },
        /**
              * 设置定时任务
              */
        setScheduledTask() {
            this.scheduledTask = setInterval(function () {
                console.log("rate:" + this.rate)
            }, 2000);
        }
    },

};


function renderItem(params, api) {
    var valOnRadian = api.value(1);
    var coords = api.coord([api.value(0), valOnRadian]);
    var polarEndRadian = coords[3];
    var imageStyle = {
        image: _panelImageURL,
        x: params.coordSys.cx - _outerRadius,
        y: params.coordSys.cy - _outerRadius,
        width: _outerRadius * 2,
        height: _outerRadius * 2
    };
    return {
        type: 'group',
        children: [
            {
                type: 'image',
                style: imageStyle,
                clipPath: {
                    type: 'sector',
                    shape: {
                        cx: params.coordSys.cx,
                        cy: params.coordSys.cy,
                        r: _outerRadius,
                        r0: _innerRadius,
                        startAngle: 0,
                        endAngle: -polarEndRadian,
                        transition: 'endAngle',
                        enterFrom: { endAngle: 0 }
                    }
                }
            },
            // {
            //     type: 'image',
            //     style: imageStyle,
            //     clipPath: {
            //         type: 'polygon',
            //         shape: {
            //             points: makePionterPoints(params, polarEndRadian)
            //         },
            //         extra: {
            //             polarEndRadian: polarEndRadian,
            //             transition: 'polarEndRadian',
            //             enterFrom: { polarEndRadian: 0 }
            //         },
            //         during: function (apiDuring) {
            //             apiDuring.setShape(
            //                 'points',
            //                 makePionterPoints(params, apiDuring.getExtra('polarEndRadian'))
            //             );
            //         }
            //     }
            // },
            //白色中心圆
            {
                type: 'circle',
                shape: {
                    cx: params.coordSys.cx,
                    cy: params.coordSys.cy,
                    r: _insidePanelRadius
                },
                style: {
                    fill: '#fff',
                    shadowBlur: _shadowBlur,
                    shadowOffsetX: 0,
                    shadowOffsetY: 0,
                    //轮廓阴影颜色
                    shadowColor: _shadowColor
                }
            },
            {
                type: 'text',
                extra: {
                    valOnRadian: valOnRadian,
                    transition: 'valOnRadian',
                    enterFrom: { valOnRadian: 0 }
                },
                style: {
                    text: makeText(valOnRadian),
                    fontSize: _fontSize,
                    fontWeight: 700,
                    x: params.coordSys.cx,
                    y: params.coordSys.cy,
                    //字体颜色
                    fill: _textColor,
                    align: 'center',
                    verticalAlign: 'middle',
                    enterFrom: { opacity: 0 }
                },
                during: function (apiDuring) {
                    apiDuring.setStyle(
                        'text',
                        makeText(apiDuring.getExtra('valOnRadian'))
                    );
                }
            }
        ]
    };
}
function convertToPolarPoint(renderItemParams, radius, radian) {
    return [
        Math.cos(radian) * radius + renderItemParams.coordSys.cx,
        -Math.sin(radian) * radius + renderItemParams.coordSys.cy
    ];
}
function makePionterPoints(renderItemParams, polarEndRadian) {
    return [
        convertToPolarPoint(renderItemParams, _outerRadius, polarEndRadian),
        convertToPolarPoint(
            renderItemParams,
            _outerRadius,
            polarEndRadian + Math.PI * 0.03
        ),
        convertToPolarPoint(renderItemParams, _pointerInnerRadius, polarEndRadian)
    ];
}
function makeText(valOnRadian) {
    // Validate additive animation calc.
    if (valOnRadian < -10) {
        alert('illegal during val: ' + valOnRadian);
    }
    return ((valOnRadian / _valOnRadianMax) * 100).toFixed(1) + '%';
}

</script>

<style lang="scss" scoped>
#customGaugeContainer {
    // height: calc(100% - 20px);
    height: 100%;
}
</style>

使用方式

在页面引入组件

使用组件

<customGauge style="height: 150px;" :rate="server.jvm.usage">
</customGauge>

到此这篇关于Vue+Echart实现利用率表盘效果的示例代码的文章就介绍到这了,更多相关Vue Echart利用率表盘效果内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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