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graphic_demo.html
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graphic_demo.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="echarts.min.js"></script>
</head>
<!-- 研究graphic绘制位置的规则 -->
<body>
<div id="main" style="width: 600px;height:400px;"></div>
<script type="text/javascript">
var symbolSize = 20;
var data = [[15, 0], [-50, 10], [-56.5, 20], [-46.5, 30], [-22.1, 40]];
var myChart = echarts.init(document.getElementById('main'));
myChart.setOption({
tooltip: {
triggerOn: 'none',
formatter: function (params) {
return 'X: ' + params.data[0].toFixed(2) + '<br>Y: ' + params.data[1].toFixed(2);
}
},
xAxis: {
min: -100,
max: 80,
type: 'value',
axisLine: { onZero: false }
},
yAxis: {
min: -30,
max: 60,
type: 'value',
axisLine: { onZero: false }
},
series: [
{
id: 'a',
type: 'line',
smooth: true,
symbolSize: symbolSize,
data: data
}
],
});
myChart.setOption({
graphic: {
type: 'circle',
id: 'circle',
shape: {
r: 10
},
position: myChart.convertToPixel('grid', [-60, 30]),
style: {
fill: '#fff',
stroke: 'red'
},
draggable: true,
z: 100,
ondrag: echarts.util.curry(onPointDragging),
}
// graphic: echarts.util.map(data, function (item, dataIndex) {
// console.log("item is:" + item)
// console.log("type is " + typeof item)
// return {
// type: 'circle',
// position: myChart.convertToPixel('grid', item),
// shape: {
// r: symbolSize / 2
// },
// invisible: true,
// draggable: true,
// ondrag: echarts.util.curry(onPointDragging, dataIndex),
// onmousemove: echarts.util.curry(showTooltip, dataIndex),
// onmouseout: echarts.util.curry(hideTooltip, dataIndex),
// z: 100
// };
// })
});
window.addEventListener('resize', function () {
myChart.setOption({
graphic: echarts.util.map(data, function (item, dataIndex) {
return {
position: myChart.convertToPixel('grid', item)
};
})
});
});
function showTooltip(dataIndex) {
myChart.dispatchAction({
type: 'showTip',
seriesIndex: 0,
dataIndex: dataIndex
});
}
function hideTooltip(dataIndex) {
myChart.dispatchAction({
type: 'hideTip'
});
}
function onPointDragging(dataIndex, dx, dy) {
y = myChart.convertFromPixel('grid', this.position);
console.log(y)
// data[dataIndex] = myChart.convertFromPixel('grid', this.position);
// myChart.setOption({
// series: [{
// id: 'a',
// data: data
// }]
// });
}
</script>
</body>
</html>