首先確保在項目中引入了echarts和echarts-gl
"echarts": "^4.9.0",
"echarts-gl": "^1.1.2"
剩下的配置好optionData的數據,交給代碼
<template>
<div class="water-eval-container">
<div class="cityGreenLand-charts" id="cityGreenLand-charts">
</div>
</div>
</template>
<script>
import echarts from 'echarts'
import 'echarts-gl';
export default {
name: "cityGreenLand",
components: {},
data() {
return {
optionData: [{
name: '林地面積統計',
value: 10000,
itemStyle: {
color: '#22c4ff',
}
}, {
name: '草地面積統計',
value: 12116,
itemStyle: {
color: '#aaff00'
}
}, {
name: '耕地地面積統計',
value: 16616,
itemStyle: {
color: '#ffaaff'
}
}],
}
},
mounted() {
this.$nextTick(function() {
this.init();
});
},
methods: {
init() {
//構建3d餅狀圖
let myChart = echarts.init(document.getElementById('cityGreenLand-charts'));
// 傳入數據生成 option
this.option = this.getPie3D(this.optionData, 0.8);
myChart.setOption(this.option);
//是否需要label指引線,如果要就添加一個透明的2d餅狀圖並調整角度使得labelLine和3d的餅狀圖對齊,並再次setOption
this.option.series.push({
name: 'pie2d',
type: 'pie',
labelLine:{
length:10,
length2:10
},
startAngle: -20 , //起始角度,支持范圍[0, 360]。
clockwise: false,//餅圖的扇區是否是順時針排布。上述這兩項配置主要是為了對齊3d的樣式
radius: ['20%', '50%'],
center: ['50%', '50%'],
data: this.optionData,
itemStyle:{
opacity:0
}
});
myChart.setOption(this.option);
this.bindListen(myChart);
},
getPie3D(pieData, internalDiameterRatio) {
//internalDiameterRatio:透明的空心占比
let that = this;
let series = [];
let sumValue = 0;
let startValue = 0;
let endValue = 0;
let legendData = [];
let legendBfb = [];
let k = 1 - internalDiameterRatio;
pieData.sort((a, b) => {
return (b.value - a.value);
});
// 為每一個餅圖數據,生成一個 series-surface 配置
for (let i = 0; i < pieData.length; i++) {
sumValue += pieData[i].value;
let seriesItem = {
name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
type: 'surface',
parametric: true,
wireframe: {
show: false
},
pieData: pieData[i],
pieStatus: {
selected: false,
hovered: false,
k: k
},
center: ['10%', '50%']
};
if (typeof pieData[i].itemStyle != 'undefined') {
let itemStyle = {};
typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null;
typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : null;
seriesItem.itemStyle = itemStyle;
}
series.push(seriesItem);
}
// 使用上一次遍歷時,計算出的數據和 sumValue,調用 getParametricEquation 函數,
// 向每個 series-surface 傳入不同的參數方程 series-surface.parametricEquation,也就是實現每一個扇形。
legendData = [];
legendBfb = [];
for (let i = 0; i < series.length; i++) {
endValue = startValue + series[i].pieData.value;
series[i].pieData.startRatio = startValue / sumValue;
series[i].pieData.endRatio = endValue / sumValue;
series[i].parametricEquation = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio,
false, false, k, series[i].pieData.value);
startValue = endValue;
let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 4);
legendData.push({
name: series[i].name,
value: bfb
});
legendBfb.push({
name: series[i].name,
value: bfb
});
}
let boxHeight = this.getHeight3D(series, 26);//通過傳參設定3d餅/環的高度,26代表26px
// 准備待返回的配置項,把准備好的 legendData、series 傳入。
let option = {
legend: {
data: legendData,
orient: 'horizontal',
left: 10,
top: 10,
itemGap: 10,
textStyle: {
color: '#A1E2FF',
},
show: true,
icon: "circle",
formatter: function(param) {
let item = legendBfb.filter(item => item.name == param)[0];
let bfs = that.fomatFloat(item.value * 100, 2) + "%";
return `${item.name} ${bfs}`;
}
},
labelLine: {
show: true,
lineStyle: {
color: '#7BC0CB'
}
},
label: {
show: true,
position: 'outside',
rich: {
b: {
color: '#7BC0CB',
fontSize: 12,
lineHeight: 20
},
c: {
fontSize: 16,
},
},
formatter: '{b|{b} \n}{c|{c}}{b| 畝}',
},
tooltip: {
formatter: params => {
if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) *
100).toFixed(2);
return `${params.seriesName}<br/>` +
`<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
`${ bfb }%`;
}
}
},
xAxis3D: {
min: -1,
max: 1
},
yAxis3D: {
min: -1,
max: 1
},
zAxis3D: {
min: -1,
max: 1
},
grid3D: {
show: false,
boxHeight: boxHeight, //圓環的高度
viewControl: { //3d效果可以放大、旋轉等,請自己去查看官方配置
alpha: 40, //角度
distance: 300,//調整視角到主體的距離,類似調整zoom
rotateSensitivity: 0, //設置為0無法旋轉
zoomSensitivity: 0, //設置為0無法縮放
panSensitivity: 0, //設置為0無法平移
autoRotate: false //自動旋轉
}
},
series: series
};
return option;
},
//獲取3d丙圖的最高扇區的高度
getHeight3D(series, height) {
series.sort((a, b) => {
return (b.pieData.value - a.pieData.value);
})
return height * 25 / series[0].pieData.value;
},
// 生成扇形的曲面參數方程,用於 series-surface.parametricEquation
getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
// 計算
let midRatio = (startRatio + endRatio) / 2;
let startRadian = startRatio * Math.PI * 2;
let endRadian = endRatio * Math.PI * 2;
let midRadian = midRatio * Math.PI * 2;
// 如果只有一個扇形,則不實現選中效果。
if (startRatio === 0 && endRatio === 1) {
isSelected = false;
}
// 通過扇形內徑/外徑的值,換算出輔助參數 k(默認值 1/3)
k = typeof k !== 'undefined' ? k : 1 / 3;
// 計算選中效果分別在 x 軸、y 軸方向上的位移(未選中,則位移均為 0)
let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
// 計算高亮效果的放大比例(未高亮,則比例為 1)
let hoverRate = isHovered ? 1.05 : 1;
// 返回曲面參數方程
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) * h * .1;
}
return Math.sin(v) > 0 ? 1 * h * .1 : -1;
}
};
},
fomatFloat(num, n) {
var f = parseFloat(num);
if (isNaN(f)) {
return false;
}
f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 冪
var s = f.toString();
var rs = s.indexOf('.');
//判定如果是整數,增加小數點再補0
if (rs < 0) {
rs = s.length;
s += '.';
}
while (s.length <= rs + n) {
s += '0';
}
return s;
},
bindListen(myChart) {
// 監聽鼠標事件,實現餅圖選中效果(單選),近似實現高亮(放大)效果。
let that = this;
let selectedIndex = '';
let hoveredIndex = '';
// 監聽點擊事件,實現選中效果(單選)
myChart.on('click', function(params) {
// 從 option.series 中讀取重新渲染扇形所需的參數,將是否選中取反。
let isSelected = !that.option.series[params.seriesIndex].pieStatus.selected;
let isHovered = that.option.series[params.seriesIndex].pieStatus.hovered;
let k = that.option.series[params.seriesIndex].pieStatus.k;
let startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
let endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
// 如果之前選中過其他扇形,將其取消選中(對 option 更新)
if (selectedIndex !== '' && selectedIndex !== params.seriesIndex) {
that.option.series[selectedIndex].parametricEquation = that.getParametricEquation(that.option.series[
selectedIndex].pieData
.startRatio, that.option.series[selectedIndex].pieData.endRatio, false, false, k, that.option.series[
selectedIndex].pieData
.value);
that.option.series[selectedIndex].pieStatus.selected = false;
}
// 對當前點擊的扇形,執行選中/取消選中操作(對 option 更新)
that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
isSelected,
isHovered, k, that.option.series[params.seriesIndex].pieData.value);
that.option.series[params.seriesIndex].pieStatus.selected = isSelected;
// 如果本次是選中操作,記錄上次選中的扇形對應的系列號 seriesIndex
isSelected ? selectedIndex = params.seriesIndex : null;
// 使用更新后的 option,渲染圖表
myChart.setOption(that.option);
});
// 監聽 mouseover,近似實現高亮(放大)效果
myChart.on('mouseover', function(params) {
// 准備重新渲染扇形所需的參數
let isSelected;
let isHovered;
let startRatio;
let endRatio;
let k;
// 如果觸發 mouseover 的扇形當前已高亮,則不做操作
if (hoveredIndex === params.seriesIndex) {
return;
// 否則進行高亮及必要的取消高亮操作
} else {
// 如果當前有高亮的扇形,取消其高亮狀態(對 option 更新)
if (hoveredIndex !== '') {
// 從 option.series 中讀取重新渲染扇形所需的參數,將是否高亮設置為 false。
isSelected = that.option.series[hoveredIndex].pieStatus.selected;
isHovered = false;
startRatio = that.option.series[hoveredIndex].pieData.startRatio;
endRatio = that.option.series[hoveredIndex].pieData.endRatio;
k = that.option.series[hoveredIndex].pieStatus.k;
// 對當前點擊的扇形,執行取消高亮操作(對 option 更新)
that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
isSelected,
isHovered, k, that.option.series[hoveredIndex].pieData.value);
that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
// 將此前記錄的上次選中的扇形對應的系列號 seriesIndex 清空
hoveredIndex = '';
}
// 如果觸發 mouseover 的扇形不是透明圓環,將其高亮(對 option 更新)
if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
// 從 option.series 中讀取重新渲染扇形所需的參數,將是否高亮設置為 true。
isSelected = that.option.series[params.seriesIndex].pieStatus.selected;
isHovered = true;
startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
k = that.option.series[params.seriesIndex].pieStatus.k;
// 對當前點擊的扇形,執行高亮操作(對 option 更新)
that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
isSelected, isHovered, k, that.option.series[params.seriesIndex].pieData.value + 5);
that.option.series[params.seriesIndex].pieStatus.hovered = isHovered;
// 記錄上次高亮的扇形對應的系列號 seriesIndex
hoveredIndex = params.seriesIndex;
}
// 使用更新后的 option,渲染圖表
myChart.setOption(that.option);
}
});
// 修正取消高亮失敗的 bug
myChart.on('globalout', function() {
// 准備重新渲染扇形所需的參數
let isSelected;
let isHovered;
let startRatio;
let endRatio;
let k;
if (hoveredIndex !== '') {
// 從 option.series 中讀取重新渲染扇形所需的參數,將是否高亮設置為 true。
isSelected = that.option.series[hoveredIndex].pieStatus.selected;
isHovered = false;
k = that.option.series[hoveredIndex].pieStatus.k;
startRatio = that.option.series[hoveredIndex].pieData.startRatio;
endRatio = that.option.series[hoveredIndex].pieData.endRatio;
// 對當前點擊的扇形,執行取消高亮操作(對 option 更新)
that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
isSelected,
isHovered, k, that.option.series[hoveredIndex].pieData.value);
that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
// 將此前記錄的上次選中的扇形對應的系列號 seriesIndex 清空
hoveredIndex = '';
}
// 使用更新后的 option,渲染圖表
myChart.setOption(that.option);
});
}
}
}
</script>
<style lang="less">
.water-eval-container {
width: 100%;
height: 100%;
}
.cityGreenLand-charts {
height: 200px;
width: 400px;
}
</style>
以上代碼復制拿走就能直接用,還不趕快試試