问题描述
在我的 JavaScript 对象数组中，我在为每个国家/地区对应的对象分别显示多个链接时遇到问题。
例如，这三个 DE 链接在工具提示中显示为一个链接：
https%3A%2F%2Fwwww.example1.com%2Chttps%3A%2F%2Fwwww.example2.com%2Chttps%3A%2F%2Fwwww.example3.com 并且我希望每个链接都在单独的行上。
如何更好地编写循环以实现我想要的？
当前循环如下所示：
//Loop for displaying links corresponding to each country
group.data.forEach(function(link){
let polygonTemplate = series.mappolygons.template;
// Instead of our custom country,we Could also use {name} which comes from geodata
polygonTemplate.tooltipHTML = '<b>{country}</b><br><a href="{link.urlEncode()}">More info</a>';
polygonTemplate.fill = am4core.color("blue");
});
您还可以查看 JSfiddle 代码段以更清楚地了解我的意思。
任何帮助将不胜感激。
谢谢！
am4core.ready(function() {
// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end
// Create map instance
let chart = am4core.create("map",am4maps.MapChart);
// Set map deFinition
chart.geodata = am4geodata_worldHigh;
// Set projection
chart.projection = new am4maps.projections.Mercator();
// Zoom control
chart.zoomControl = new am4maps.ZoomControl();
let homeButton = new am4core.Button();
homeButton.events.on("hit",function() {
chart.goHome();
});
homeButton.icon = new am4core.Sprite();
homeButton.padding(7,5,7,5);
homeButton.width = 30;
homeButton.icon.path = "M16,8 L14,16 L10,10 L6,16 L2,8 L0,8 L8,0 L16,8 Z M16,8";
homeButton.marginBottom = 10;
homeButton.parent = chart.zoomControl;
homeButton.insertBefore(chart.zoomControl.plusButton);
// Center on the groups by default
chart.homeZoomLevel = 5;
chart.homeGeoPoint = { longitude: 10,latitude: 52 };
let groupData = [
{
"color": chart.colors.getIndex(0),"data": [
{
"country": "Germany","id": "DE",// With MappolygonSeries.useGeodata = true,it will try and match this id,then apply the other properties as custom data
"link": ["https://wwww.example1.com","https://wwww.example2.com","https://wwww.example3.com"],},{
"country": "France","id": "FR","link": ["https://wwww.example4.com"],{
"country": "Belgium","id": "BE","link": ["https://wwww.example5.com","https://wwww.example6.com"]
},{
"country": "Netherlands","id": "NL","link": ["https://wwww.example7.com"]
}
]
}
];
// This array will be populated with country IDs to exclude from the world series
let excludedCountries = ["AQ"];
// Create a series for each group,and populate the above array
groupData.forEach(function(group) {
let series = chart.series.push(new am4maps.MappolygonSeries());
series.name = group.name;
series.useGeodata = true;
let includedCountries = [];
// Make a loop to display a link for the group of countries
group.data.forEach(function(country) {
includedCountries.push(country.id);
excludedCountries.push(country.id);
//Loop for displaying links corresponding to each country
group.data.forEach(function(link){
let polygonTemplate = series.mappolygons.template;
// Instead of our custom country,we Could also use {name} which comes from geodata
//polygonTemplate.tooltipHTML = '<b>{country}</b><br><a href="{link.urlEncode()}">More info</a>';
polygonTemplate.tooltipHTML = '<b>{country}</b>' + link.link.map(url =>
'<br><a href="{url.urlEncode()}">More info</a>').join("");
polygonTemplate.fill = am4core.color("blue");
});
});
series.include = includedCountries;
series.fill = am4core.color(group.color);
series.setStateOnChildren = true;
series.calculateVisualCenter = true;
series.tooltip.label.interactionsEnabled = true;
series.tooltip.keepTargetHover = true;
// Country shape properties & behaviors
let mappolygonTemplate = series.mappolygons.template;
mappolygonTemplate.fill = am4core.color(group.color);
mappolygonTemplate.fillOpacity = 0.8;
mappolygonTemplate.nonScalingstroke = true;
mappolygonTemplate.tooltipPosition = "fixed";
mappolygonTemplate.events.on("over",function(event) {
series.mappolygons.each(function(mappolygon) {
mappolygon.isHover = false;
})
event.target.isHover = false;
event.target.isHover = true;
})
mappolygonTemplate.events.on("out",function(event) {
series.mappolygons.each(function(mappolygon) {
mappolygon.isHover = false;
})
})
// States
let hoverState = mappolygonTemplate.states.create("hover");
hoverState.properties.fill = am4core.color("#9985e3");
series.data = JSON.parse(JSON.stringify(group.data));
});
// The rest of the world.
let worldSeries = chart.series.push(new am4maps.MappolygonSeries());
let worldSeriesName = "world";
worldSeries.name = worldSeriesName;
worldSeries.useGeodata = true;
worldSeries.exclude = excludedCountries;
worldSeries.fillOpacity = 0.5;
worldSeries.hiddenInLegend = true;
worldSeries.mappolygons.template.nonScalingstroke = true;
});body {
font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
}
#map {
width: 100%;
height: 600px;
}
a {
cursor: pointer;
color: rgb(4,46);
}<!DOCTYPE html>
<html lang="en">
<head>
<Meta charset="UTF-8">
<Meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>Some countries</title>
<link rel="stylesheet" href="css/site.css">
</head>
<!-- Scripts for loading AmCharts Map -->
<script src="https://cdn.amcharts.com/lib/4/core.js"></script>
<script src="https://cdn.amcharts.com/lib/4/maps.js"></script>
<script src="https://cdn.amcharts.com/lib/4/geodata/worldHigh.js"></script>
<script src="https://cdn.amcharts.com/lib/4/themes/animated.js"></script>
<script src="js/custom.js"></script>
<body>
<div id="map"></div>
</body>
</html>解决方法
使用 map() 迭代 link 属性并使每个 URL 在 tooltipHTML 属性中单独一行。
polygonTemplate.tooltipHTML = '<b>{country.country}</b>' + country.link.map(url =>
'<br><a href="{url.urlEncode()}">More info</a>').join("");
mapPolygonTemplate.events.on("over",function(event) {
series.mapPolygons.each(function(mapPolygon) {
mapPolygon.isHover = false;
})
event.target.isHover = false;
group.data.forEach(function(country) {
event.target.tooltipHTML = '<b>{country}</b>' + country.link.map(url =>
'<br><a href="{link.urlEncode()}">More info</a>').join("");
polygonTemplate.fill = am4core.color("blue");
});
event.target.isHover = true;
});
这就是它的解决方案的样子。我没有在小提琴上试过这个，但我很确定流程。看看是否可以在调用 setToolTip() 时设置 toolTipHtml。
还有一件事，如果您可以将悬停的多边形与您的 JSON 数据相关联，那么您不需要遍历“group.data”，而是从数组中获取对象并附加链接进入 toolTipHtml。