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| <script> /** * props: 未列出的props与原Chart组件相同 * height: 高度 * data: 格式化后的数据,不是chart option * option:同 data,取此名是为方便直接修改2D组件为3D组件而不用修改props字段 * distance: 视角距离,值越大饼图越小,默认200 * position: [left, top] 饼图位置,取值:百分比|数字字符串,默认值['-25%', '0'] * tipField: 饼图鼠标划过百分比取值字段,默认 rate || LZ * legendPosition: [left, top] legend位置,取值:百分比|数字字符串,默认 ['50%', 'height/5.5'] * legendRich: legend rich,默认值请在下面代码中查看 * legendFormatter(name, data): legend formatter,data即格式化后的数据,默认值请在下面代码中查看 * autoRotate: 自动旋转, 默认 false */
import isEqual from 'lodash/isEqual' import isEmpty from 'lodash/isEmpty' import find from 'lodash/find' import colors from '@/comp/colors'
function fixedUnit(num = 0) { if (isNaN(num)) num = 0 num = Math.abs(num) if (num > 1e4) { return '万' }
return '' } function fixed4(num) { if (isNaN(num) || num == null) return '-' let flag = false if (num < 0) { num = Math.abs(num) flag = true } if (num > 1e4) { num = parseInt(num / 1e2) / 100 } return ((flag ? '-' : '') + num) * 1 }
function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, height) { // 计算 const midRatio = (startRatio + endRatio) / 2 const startRadian = startRatio * Math.PI * 2 const endRadian = endRatio * Math.PI * 2 const midRadian = midRatio * Math.PI * 2
// 如果只有一个扇形,则不实现选中效果。 if (startRatio === 0 && endRatio === 1) { isSelected = false }
// 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3) k = k ?? 1 / 3
// 计算选中效果分别在 x 轴、y 轴方向上的位移(未选中,则位移均为 0) const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0 const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0
// 计算高亮效果的放大比例(未高亮,则比例为 1) const hoverRate = isHovered ? 1.1 : 1
// 返回曲面参数方程 return { u: { min: -Math.PI, max: Math.PI * 3, step: Math.PI / 32, },
v: { min: 0, max: Math.PI * 2, step: Math.PI / 20, },
x: function (u, v) { if (u < startRadian) { return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate } if (u > endRadian) { return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate } return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate },
y: function (u, v) { if (u < startRadian) { return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate } if (u > endRadian) { return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate } return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate },
z: function (u, v) { if (u < -Math.PI * 0.5) { return Math.sin(u) } if (u > Math.PI * 2.5) { return Math.sin(u) } return Math.sin(v) > 0 ? 1 * height : -1 }, } }
// 生成模拟 3D 饼图的配置项 function getPie3D({ pieData, tipField, position, legendPosition, legendRich, legendFormatter, autoRotate, boxHeight, distance, internalDiameterRatio, }) { const series = [] let sumValue = 0 let startValue = 0 let endValue = 0 const legendData = [] const k = typeof internalDiameterRatio !== 'undefined' ? (1 - internalDiameterRatio) / (1 + internalDiameterRatio) : 1 / 3
// 为每一个饼图数据,生成一个 series-surface 配置 for (let i = 0; i < pieData.length; i++) { sumValue += pieData[i].value * 1
const seriesItem = { name: pieData[i].name ?? `series${i}`, type: 'surface', parametric: true, wireframe: { show: false, }, pieData: pieData[i], pieStatus: { selected: false, hovered: false, k, }, }
if (!pieData[i].itemStyle) { const itemStyle = {}
if (!pieData[i].itemStyle.color) { itemStyle.color = pieData[i].itemStyle.color } else { itemStyle.color = colors[i] } if (!pieData[i].itemStyle.opacity) { itemStyle.opacity = pieData[i].itemStyle.opacity } else { itemStyle.opacity = 1 }
seriesItem.itemStyle = itemStyle } series.push(seriesItem) } // 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数, // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation,也就是实现每一个扇形。 const isZero = pieData.every((e) => e.value * 1 === 0) const len = series.length || 1 for (let i = 0; i < len; i++) { if (!series[i]?.pieData) series[i].pieData = {} if (isZero) { series[i].pieData.startRatio = i / len series[i].pieData.endRatio = i === len - 1 ? 1 : (i + 1) / len } else { endValue = startValue * 1 + (series[i]?.pieData.value || 0) * 1 series[i].pieData.startRatio = startValue / sumValue series[i].pieData.endRatio = i === len - 1 ? 1 : endValue / sumValue } series[i].parametricEquation = getParametricEquation( series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, 4000 )
startValue = endValue
legendData.push(series[i].name) }
// series.push({ // name: 'pie2d', // type: 'pie', // label: { // opacity: 1, // position: 'outside', // fontSize: 12, // lineHeight: 20, // textStyle: { // fontSize: 12, // color: '#fff', // }, // }, // labelLine: { // length: 30, // length2: 30, // }, // minAngle: 10, // startAngle: 50, // 起始角度,支持范围[0, 360]。 // clockwise: false, // 饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式 // radius: ['60%', '60%'], // center: ['30%', '50%'], // data: pieData.map((item) => { // item.itemStyle.opacity = 0 // return item // }), // })
// 准备待返回的配置项,把准备好的 legendData、series 传入。 const option = { animation: true, color: colors, backgroundColor: 'rgba(0,0,0,0)', // 图例组件 legend: { data: legendData, // 图例列表的布局朝向。 orient: 'vertical', left: legendPosition[0] ?? '50%', top: legendPosition[1] ?? boxHeight / 5.5, // 图例文字每项之间的间隔 itemGap: 5, show: true, icon: 'rect', itemHeight: 10, itemWidth: 10, textStyle: { // 图例字体大小 fontSize: 12, color: '#B8DDFF', lineHeight: 14, rich: legendRich, },
// 格式化图例文本 formatter: function (name) { return legendFormatter(name, pieData) }, },
tooltip: { formatter: (params) => { if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') { const item = option.series[params.seriesIndex]?.pieData || {} const rate = item[tipField] ?? item?.rate ?? item?.LZ ?? '-' return `${ params.seriesName }<br/><span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${ params.color };"></span>${rate + '%'}` } }, textStyle: { fontSize: 14, }, }, title: { x: 'center', top: '20', textStyle: { color: '#fff', fontSize: 22, }, },
labelLine: { show: true, lineStyle: { color: '#7BC0CB', }, normal: { show: true, length: 10, length2: 10, }, }, label: { show: true, position: 'outside', formatter: '{b} \n{d}%', textStyle: { color: '#fff', fontSize: '12px', }, }, xAxis3D: { min: -1, max: 1, }, yAxis3D: { min: -1, max: 1, }, zAxis3D: { min: -1, max: 1, }, grid3D: { show: false, boxHeight: 0.01, left: position[0] ?? '-25%', top: position[1] ?? '0', // environment: 'rgba(0,0,0,0)', viewControl: { distance, alpha: 35, beta: 60, autoRotate, // 自动旋转 zoomSensitivity: false, rotateSensitivity: false, }, }, series: series, }
return option }
function bindListen( chart, data, distance, position, tipField, legendPosition, legendRich, legendFormatter, autoRotate, boxHeight ) { chart.setOption( getPie3D({ pieData: data, tipField, position, legendPosition, legendRich, legendFormatter, autoRotate, boxHeight, distance, internalDiameterRatio: 0.6, }) ) }
export default { props: { reset: { type: Boolean, default: true, }, height: { type: Number, default: 400, }, option: { type: Array, default: () => [], }, data: { type: Array, default: () => [], }, distance: { type: [Number, String], default: 200, }, position: { type: Array, default: () => [], }, tipField: { type: String, default: '', }, legendPosition: { type: Array, default: () => [], }, legendRich: { type: Object, default: () => ({ one: { color: '#ffffff', width: 60, }, two: { color: '#59caf0', fontSize: 18, fontWeight: 600, }, three: { color: '#d7dcf2', }, }), }, legendFormatter: { type: Function, default: (name, pieData) => { const item = find(pieData, ['name', name]) return `{one|${name}} {two|${fixed4(item.value)}} {three|${fixedUnit(item.value)}个}` }, }, autoRotate: { type: Boolean, default: false, }, }, data() { return { chart: null, } }, computed: { list() { if (!isEmpty(this.option)) return this.option else if (!isEmpty(this.data)) return this.data
return [] }, }, watch: { list(n, o) { if (!isEqual(n, o)) { if (this.reset) { this.chart.clear() } bindListen( this.chart, n, this.distance * 1, this.position, this.tipField, this.legendPosition, this.legendRich, this.legendFormatter, this.autoRotate, this.height ) } }, }, mounted() { this.initChart() }, methods: { resize() { this.chart.resize() }, clear() { const canvasArr = this.chart.getDom().getElementsByTagName('canvas') for (const item of canvasArr) { const itemWebgl = item.getContext('webgl') itemWebgl?.getExtension && itemWebgl.getExtension('WEBGL_lose_context').loseContext() } this.chart.clear() }, initChart() { this.chart = this.$echarts.init(this.$refs.chart) this.chart.resize() window.addEventListener('resize', () => { this.chart.resize() }) bindListen( this.chart, this.list, this.distance * 1, this.position, this.tipField, this.legendPosition, this.legendRich, this.legendFormatter, this.autoRotate, this.height ) this.chart.off('legendselectchanged') this.chart.on('legendselectchanged', (p) => { this.chart.setOption({ legend: { selected: { [p.name]: true } }, }) if (this.$listeners['legend']) { this.$emit('legend', p) } }) }, }, } </script> <template> <div ref="chart" :style="{ width: '100%', height: height <= 100 ? `${height}%` : `${height}px` }"></div> </template>
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