const myChartContainer = document.getElementById( 'chart' );
const myChart = echarts.init( myChartContainer );
let minAngle = 30;
for ( let i = 0; i < obj.data.length; i++ ) {
if ( obj.data[ i ].value === 0 ) {
minAngle = 0;
break;
}
}
const pieValue = obj.data.map( v => {
return v.value;
} )
const sum = pieValue.reduce( ( prev, cur ) => {
return prev + cur;
}, 0 );
const sum2 = pieValue.reduce( ( prev, cur ) => {
if ( cur < sum / 12 && cur > 0 ) {
return prev + sum / 12;
}
return prev + cur;
}, 0 );
let initPieValue = pieValue[ 0 ];
if ( initPieValue < sum / 12 && initPieValue > 0 ) {
initPieValue = sum / 12;
}
const option = {
tooltip: {
show: false,
trigger: 'item',
formatter: '{a} <br/>{b}: {c} ({d}%)'
},
legend: {
show: false,
orient: 'vertical',
x: 'left'
},
color: [ '#44bbf8', '#93e588', '#ffd87b', '#f88071' ],
series: [
{
name: '',
type: 'pie',
radius: [ '45%', '79%' ],
clockWise: false,
startAngle: 167 - ( initPieValue / sum2 * 360 / 2 ),
minAngle: minAngle,
avoidLabelOverlap: false,
itemStyle: {
emphasis: {
radius: [ '46%', '100%' ]
}
},
label: {
normal: {
show: false,
position: 'center'
},
emphasis: {
show: false,
textStyle: {
fontSize: '30',
fontWeight: 'bold'
}
}
},
labelLine: {
normal: {
show: false
}
},
data: obj.data
}
]
};
myChart.setOption( option );
if ( minAngle === 30 ) {
myChart.dispatchAction( { type: 'highlight', seriesIndex: 0, dataIndex: 0 } );
}
let preDataIndex = 0;
myChart.on( 'click', ( v ) => {
if ( v.dataIndex === preDataIndex ) {
myChart.dispatchAction( {
type: 'highlight',
seriesIndex: 0,
dataIndex: v.dataIndex
} );
return;
}
const sum1 = pieValue.reduce( ( prev, cur, index ) => {
if ( index < v.dataIndex ) {
if ( cur < sum / 12 && cur > 0 ) {
return prev + sum / 12; // 饼图的扇形最小角度设置为30，占圆的1/12
}
return prev + cur;
}
return prev;
}, 0 );
// console.log( 'sum', sum1, sum2, v.dataIndex );
let curPieValue = pieValue[ v.dataIndex ];
if ( curPieValue < sum / 12 && curPieValue > 0 ) {
curPieValue = sum / 12;
}
option.series[ 0 ].startAngle = 167 - ( sum1 / sum2 * 360 + curPieValue / sum2 * 360 / 2 );
myChart.setOption( option );
preDataIndex = v.dataIndex;
window.setTimeout( () => {
myChart.dispatchAction( {
type: 'highlight',
seriesIndex: 0,
dataIndex: v.dataIndex
} );
}, 400 );
this.mrkName = v.data.name;
this.mrkValue = v.data.value;
} );