Highcharts: Make the legend symbol a square or rectangle

Question

I am trying to Make the legend symbol a square or rectangle for a line graph. Example

The line is fine. I dont want change the line width. HTML:

<script src="http://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

Javascript:

$(function () {
    var chart = new Highcharts.Chart({
        chart: {
        renderTo: 'container',
        type: 'line',
        },
        xAxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        },

        plotOptions: {
            series: {
                marker: {
                    enabled: false
                }
            }
        },
        legend: {
            layout: 'vertical',
            align: 'right',
            verticalAlign: 'middle',
            symbolHeight:100,
            borderWidth: 0
        },

        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
        }]
    });
});

I tried adding symbolHeight in legend. But its not working.

legend: {
            layout: 'vertical',
            align: 'right',
            verticalAlign: 'middle',
            symbolHeight:100,
            borderWidth: 0
        },

How to increase the height of line symbol to make it rectangle or square?

Solution 1

You can make a fake series as follows and provider marker to it.

$(function () {
var chart = new Highcharts.Chart({
    chart: {
    renderTo: 'container',
    type: 'line',
    },
    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
    },

    plotOptions: {
        series: {
            marker: {
                enabled: true
            }
        }
    },
    legend: {
        layout: 'vertical',
        align: 'right',
        verticalAlign: 'middle',

        //borderWidth: 0
    },

    series: [{

        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4],
        showInLegend : false,


        marker:{enabled:false}

    },{
        name : "testing",
        data : {},
        marker : {symbol : 'square',radius : 12 }
    }
            ]
});
});

Working demo : DEMO

Solution 2

It's possible to achieve square legend symbols via configuration. Just set legend.symbolRadius value to 0.

JSFiddle demo: https://jsfiddle.net/9bzy2qzq/

Solution 3

This is a copy of the question: How to access legendSymbols and change their shape in HighCharts

It has a similar answer and two others:

First Option:

Highcharts.seriesTypes.line.prototype.drawLegendSymbol = 
Highcharts.seriesTypes.area.prototype.drawLegendSymbol;

Second Option:

You can change the stroke-width attribute on the path element.

We can provide functions to Highcharts that will be drawn whenever the chart is drawn. Since redraw is not called on the first drawing the load event is needed

chart: {
    events: {
        load: function () { 
            $(".highcharts-legend-item path").attr('stroke-width', 10);
        },
        redraw: function () {
            $(".highcharts-legend-item path").attr('stroke-width', 10);
        }
    }
},

Solution 4

All answers are correct but I found a pretty hack method. Replacing legend rectangle symbol with square:

legend: {
   symbolHeight: 12,
   symbolWidth: 12,
   symbolRadius: 6
}

JsFiddle

Solution 5

For rectangular legend we need to set squareSymbol: false.

Highcharts.chart('container', {
    chart: {
       type: 'column'
    },

    title: {
       text: 'Round legend symbols'
    },

    xAxis: {
       categories: ['Jan', 'Feb', 'Mar', 'Apr']
    },

    legend: {
       symbolWidth: 16,
       symbolRadius: 0,
       squareSymbol: false
    },

    series: [{
        data: [1, 3, 2, 4]
    }, {
        data: [6, 4, 5, 3]
    }, {
        data: [2, 7, 6, 5]
    }]

});

<script src="https://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

View more solutions

Comments

[Sebastian Bochan]

See the similiar topic: stackoverflow.com/questions/24859766/… / stackoverflow.com/questions/10551727/…

[Manu K Mohan]

@SebastianBochan I have tried these. But I have updated the question to make it more understandable.

[Jags]

This does not work for line charts, as specified in the question

[iddo]

Your demo contains a column chart, but a solution for a line chart is asked. When changing type to "line" it clearly doesnt work.

[Bill_VA]

I received this from the HighSoft support guys: If you enable markers for line charts, you will see that the legend items will also change. As a workaround you could overwrite line markers with column markers too. Take a look at both example below. API Reference: api.highcharts.com/highcharts/series.line.marker Examples: jsfiddle.net/j53pbxb1 - markers enabled jsfiddle.net/q4Lrabpx - markers from column series Highcharts.seriesTypes.line.prototype.drawLegendSymbol = Highcharts.seriesTypes.column.prototype.drawLegendSymbol;

[Jana Weschenfelder]

The question was for a line graph. If you change the type to 'line' instead of 'column', it will not work anymore.

[Gauri Kesava Kumar]

I appreciate it ! :) Thank you

[Rob Banmeadows]

Yes! - this helped my to get rectangular symbols. Thanks!

[K Pradeep Kumar Reddy]

How to make it a circle ?