Addressing the issue of Google Charts legends overlapping

As a newcomer to Stackoverflow and Google Charts, I am encountering an issue in one of my projects that utilizes the Google Charts API. Specifically, I am trying to display two legends on the chart but they are overlapping in the preview.

Despite exploring various solutions on both Stackoverflow and JSFiddle, none of them have proven effective in resolving this problem.

Below is a snippet of my code along with the resulting output:

Configuration Object for Chart :

    var options = {
        hAxis : {
            title : xAxis,
            textStyle:{
                color: 'black',
                fontSize : '8px'
            },
            slantedText : true,
            slantedTextAngle : 90,
            titleTextStyle : {
                fontSize : '15px',
                italic : false
            },
        },
        vAxis : {
            title : yAxis,
            format:format,
            textStyle:{
                color: 'black',
                fontSize : '8px'
            },
            titleTextStyle : {
                fontSize : '15px',
                italic : false
            },
            viewWindowMode : 'explicit',
            viewWindow : {
                min : 0,
                //max: 1200000
            }
        },
        backgroundColor : 'transparent',
        interpolateNulls: false,
        width : 350,
        height : 180,
        chartArea : {
            left : 40,
            width : '45%',
            height : '45%'
        },
     legend: {
          position: 'top',
            maxLines: 3,
        },
        series : {
            0 : {
                color : line1Color,
                visibleInLegend : true,
                pointShape: 'square',
                pointSize: 10,
            },
            1 : {
                color : line2Color,
                visibleInLegend : true,
                pointShape: 'diamond',
                pointSize: 10,
            }
        }
    };

Output:

javascriptchartsgoogle-visualization

Answer №1

Regrettably, there is no direct option to make the legend span multiple lines.

I struggled to stack the legends as shown in the screenshot; instead, they would get cut off with '...' at the end.

The only workaround I found was to increase the width significantly and also adjust the chartArea.width.

You could experiment with adjusting both width and chartArea.width until you achieve the desired layout.

Another important point, when using fontSize in the chart options, it should be a numerical value like 8, not a string like '8px'.

For reference, refer to the code snippet below...

google.charts.load('current', {
  callback: function () {
    var data = google.visualization.arrayToDataTable([
      ['Month', 'Tool - Long title could not read', 'Tool - Something to Prod Start'],
      [new Date('08/01/2015'), 0.2, 0.0],
      [new Date('09/01/2015'), 0.8, 0.0],
      [new Date('10/01/2015'), 1.0, 2.2],
      [new Date('11/01/2015'), 1.3, 1.2],
      [new Date('12/01/2015'), 1.8, 1.4],
      [new Date('01/01/2016'), 2.4, 1.5],
      [new Date('02/01/2016'), 2.5, 1.4],
      [new Date('03/01/2016'), 2.6, 1.5],
      [new Date('04/01/2016'), 2.5, 1.5],
      [new Date('05/01/2016'), 2.4, 1.6],
      [new Date('06/01/2016'), 2.3, 1.6],
      [new Date('07/01/2016'), 2.2, 1.5]
    ]);

    var options = {
        hAxis : {
            title : 'xAxis',
            format: 'MMM-yy',
            textStyle:{
                color: 'black',
                fontSize : 8
            },
            slantedText : true,
            slantedTextAngle : 90,
            titleTextStyle : {
                fontSize : 15,
                italic : false
            },
        },
        vAxis : {
            title : 'yAxis',
            format: '#,##0.0',
            textStyle:{
                color: 'black',
                fontSize : 8
            },
            titleTextStyle : {
                fontSize : 15,
                italic : false
            },
            viewWindowMode : 'explicit',
            viewWindow : {
                min : 0
            }
        },
        backgroundColor : 'transparent',
        interpolateNulls: false,
        width : 780,
        height : 180,
        chartArea : {
            left : 40,
            width : 310,
            height : '45%'
        },
        legend: {
            position: 'top',
            maxLines: 3
        },
        series : {
            0 : {
                color : '#154360',
                visibleInLegend : true,
                pointShape: 'square',
                pointSize: 10,
            },
            1 : {
                color : '#5499C7',
                visibleInLegend : true,
                pointShape: 'diamond',
                pointSize: 10,
            }
        }
    };

    var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
    chart.draw(data, options);
  },
  packages: ['corechart']
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

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