Tooltip is used to display details about the items in the TreeMap. When space constraints prevent us from displaying the information using Data Labels, the tooltip comes in handy.
The tooltip is not visible by default, to make it visible, set the visible
property in the tooltipSettings
to true and injecting the TreeMapTooltip
module using the TreeMap.Inject(TreeMapTooltip)
.
var treemap = new ej.treemap.TreeMap({
dataSource: [
{ fruit:'Apple', count:5000 },
{ fruit:'Mango', count:3000 },
{ fruit:'Orange', count:2300 },
{ fruit:'Banana', count:500 },
{ fruit:'Grape', count:4300 },
{ fruit:'Papaya', count:1200 },
{ fruit:'Melon', count:4500 }
],
weightValuePath: 'count',
tooltipSettings: {
visible: true
},
leafItemSettings: {
labelPath: 'fruit'
}
}, '#container');
<!DOCTYPE html><html lang="en"><head>
<title>Essential JS 2 for Treemap </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Essential JS 2 for treemap UI Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/21.1.35/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>
The tooltip content is displayed by default based on the weightValuePath
. In addition, to show more information in the tooltip, use the format
property and define field from the data source as ${datafield}
.
var treemap = new ej.treemap.TreeMap({
dataSource: [
{ fruit:'Apple', count:5000 },
{ fruit:'Mango', count:3000 },
{ fruit:'Orange', count:2300 },
{ fruit:'Banana', count:500 },
{ fruit:'Grape', count:4300 },
{ fruit:'Papaya', count:1200 },
{ fruit:'Melon', count:4500 }
],
weightValuePath: 'count',
tooltipSettings: {
visible: true,
format:'Name:${fruit} - TotalCount:${count}'
},
leafItemSettings: {
labelPath: 'fruit'
}
}, '#container');
<!DOCTYPE html><html lang="en"><head>
<title>Essential JS 2 for Treemap </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Essential JS 2 for treemap UI Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/21.1.35/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>
Tooltip can be rendered as a custom component using the template
property in the tooltipSettings
which accepts one or more UI elements as an input, that can be rendered as a part of the tooltip rendering. You can use ${datafield}
as placeholder in HTML element to display the values from data source.
var treemap = new ej.treemap.TreeMap({
dataSource: [
{ fruit:'Apple', count:5000 },
{ fruit:'Mango', count:3000 },
{ fruit:'Orange', count:2300 },
{ fruit:'Banana', count:500 },
{ fruit:'Grape', count:4300 },
{ fruit:'Papaya', count:1200 },
{ fruit:'Melon', count:4500 }
],
weightValuePath: 'count',
tooltipSettings: {
visible: true,
template:'<div><p>Name: ${fruit}</p><p>Total Count: ${count}</p></div>'
},
leafItemSettings: {
labelPath: 'fruit'
}
}, '#container');
<!DOCTYPE html><html lang="en"><head>
<title>Essential JS 2 for Treemap </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Essential JS 2 for treemap UI Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/21.1.35/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>