Javascript 如何避免chart.js中值彼此接近的点重叠
我正在使用chart.js折线图和点。每当我有接近值的数据时,图像就会重叠,因为轴上的时间刻度并没有缩放。正如您可以从代码中看到的,名称为title3和title8的代码点重叠且不完全可见。是否有任何解决方案或技巧来避免重叠,以便用户可以同时看到这两个点。请参考示例Javascript 如何避免chart.js中值彼此接近的点重叠,javascript,angularjs,charts,chart.js,Javascript,Angularjs,Charts,Chart.js,我正在使用chart.js折线图和点。每当我有接近值的数据时,图像就会重叠,因为轴上的时间刻度并没有缩放。正如您可以从代码中看到的,名称为title3和title8的代码点重叠且不完全可见。是否有任何解决方案或技巧来避免重叠,以便用户可以同时看到这两个点。请参考示例 var ctx=document.getElementById(“myChart”).getContext(“2d”); var eposodicimage=新图像(); episodicImage.src=https://imag
var ctx=document.getElementById(“myChart”).getContext(“2d”);
var eposodicimage=新图像();
episodicImage.src=https://image.ibb.co/gLLZ8a/episodic.png';
函数newDateString(天){
返回时刻();
}
var ManualImage=新图像();
ManualImage.src=https://image.ibb.co/fr2p8a/user_successful.png';
var eposodicfailimage=新图像();
eposodicfailimage.src=https://image.ibb.co/eMGfya/episodic_failed.png';
var myChart=新图表(ctx{
键入:“行”,
数据:{
/*标签:[“红色”、“蓝色”、“黄色”、“绿色”、“紫色”、“橙色”、“粉色”]*/
数据集:[{
填充:假,
填充颜色:“rgba(2200,0)”,
strokeColor:“rgba(220180,0,1)”,
点颜色:“rgba(220180,0,1)”,
展示线:错,
点半径:20,
pointStyle:[情节图像,手动图像,情节失败图像,手动图像,情节图像,手动图像,手动图像,手动图像],
数据:[
{x:“2015-01-20T17:07:24+07:30”,y:“04:30”,名字:“Title1”},
{x:“2015-07-01T17:05:24+05:30”,y:“12:00”,名字:“Title2”},
{x:“2015-12-31T17:05:24+05:30”,y:“07:00”,名字:“Title3”},
{x:“2016-05-13T17:05:24+05:30”,y:“05:00”,名称:“Title4”},
{x:“2016-11-13T17:05:24+05:30”,y:“03:00”,名字:“Title5”},
{x:“2017-01-10T17:05:24+05:30”,y:“12:45”,名字:“Title6”},
{x:“2017-09-13T17:05:24+05:30”,y:“17:00”,名字:“Title7”},
{x:“2015-12-30T17:05:24+05:30”,y:“07:15”,名称:“Title8”},],
背景颜色:“FC940B”,
}]
},
选项:{
图例:{
显示:假
},
比例:{
xAxes:[{
键入:“时间”,
滴答声:{
平均轮换时间:30,
最大值:20//角度(度)
},
显示:对,
scaleLabel:{
显示:对,
标签字符串:“日期”
}
}],
雅克斯:[{
键入:“时间”,
显示:对,
贝吉纳泽罗:是的,
时间:{
格式:“HH:mm”,
单位:小时,
显示格式:{
‘hour’:‘HH:mm’,
}
}
}]
},
工具脚本模板:“”,
缩放:{
启用:对,
模式:“xy”,
限制:{
最高:10,
最低:0.5
}
}
},
});
Chart.defaults.global.tooltipYPadding=16;
Chart.defaults.global.tooltipCornerRadius=0;
Chart.defaults.global.tooltipTitleFontStyle=“正常”;
Chart.defaults.global.tooltipFillColor=“rgba(10160,10,0.8)”;
document.getElementById(“myChart”).onclick=function(evt){
var activePoints=myChart.getElementsAtEvent(evt);
var firstPoint=activePoints[0];
var value=myChart.data.datasets[firstPoint.\u datasetIndex].data[firstPoint.\u index];
警报(“时间”+value.y+“日期”+value.x);
console.log(value.x);
};
Html
var ctx = document.getElementById("myChart").getContext('2d');
var episodicImage = new Image();
episodicImage.src ='https://image.ibb.co/gLLZ8a/episodic.png';
function newDateString(days) {
return moment().add(days, 'd').format();
}
var ManualImage = new Image();
ManualImage.src ='https://image.ibb.co/fr2p8a/user_successful.png';
var EpisodicfailImage = new Image();
EpisodicfailImage.src ='https://image.ibb.co/eMGfya/episodic_failed.png';
var myChart = new Chart(ctx, {
type: 'line',
data: {
/* labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange","Pink"], */
datasets: [{
fill: false,
fillColor: "rgba(220,220,220,0)",
strokeColor: "rgba(220,180,0,1)",
pointColor: "rgba(220,180,0,1)",
showLine: false,
pointRadius : 20,
pointStyle: [episodicImage, ManualImage, EpisodicfailImage, ManualImage, episodicImage,ManualImage,ManualImage,ManualImage],
data: [
{x: "2015-01-20T17:07:24+07:30", y: "04:30",name:"Title1"},
{x: "2015-07-01T17:05:24+05:30", y:"12:00",name:"Title2"},
{x: "2015-12-31T17:05:24+05:30", y:"07:00",name:"Title3"},
{x: "2016-05-13T17:05:24+05:30", y:"05:00",name:"Title4"},
{x: "2016-11-13T17:05:24+05:30", y:"03:00",name:"Title5"},
{x: "2017-01-10T17:05:24+05:30", y:"12:45",name:"Title6"},
{x: "2017-09-13T17:05:24+05:30", y:"17:00",name:"Title7"},
{x: "2015-12-30T17:05:24+05:30", y:"07:15",name:"Title8"},],
backgroundColor: "#FC940B",
}]
},
options: {
legend: {
display: false
},
scales: {
xAxes: [{
type: "time",
ticks: {
minRotation:30,
maxTicksLimit: 20// angle in degrees
},
display: true,
scaleLabel: {
display: true,
labelString: 'Date'
}
}],
yAxes: [{
type: "time",
display: true,
beginAtZero: true,
time: {
format: "HH:mm",
unit: 'hour',
displayFormats: {
'hour': 'HH:mm',
}
}
}]
},
tooltipTemplate: "<%= name %>",
zoom: {
enabled: true,
mode: 'xy',
limits: {
max: 10,
min: 0.5
}
}
},
});
Chart.defaults.global.tooltipYPadding = 16;
Chart.defaults.global.tooltipCornerRadius = 0;
Chart.defaults.global.tooltipTitleFontStyle = "normal";
Chart.defaults.global.tooltipFillColor = "rgba(10,160,10,0.8)";
document.getElementById("myChart").onclick = function(evt){
var activePoints = myChart.getElementsAtEvent(evt);
var firstPoint = activePoints[0];
var value = myChart.data.datasets[firstPoint._datasetIndex].data[firstPoint._index];
alert("Time "+value.y + " Date " + value.x);
console.log(value.x);
};
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js"></script>
<script src="https://npmcdn.com/Chart.Zoom.js@latest/Chart.Zoom.min.js"></script>
<script src="https://npmcdn.com/chart.js@latest/dist/Chart.bundle.min.js"></script>
<div style="width:90%;">
<canvas id="myChart"></canvas>
</div>