DHTMLX Docs & Samples Explorer

Colors: custom logic

Colors can be defined using function. In this sample color of bars depends on sales value, and colors of pie sectors are alternative.

Source
<script src="../../codebase/dhtmlxchart.js" type="text/javascript"></script>
<link rel="STYLESHEET" type="text/css" href="../../codebase/dhtmlxchart.css">
<style>
    .dhx_chart_title{
        padding-left:3px
    }
</style>
<script>
var data = [{
    sales: "2.9",
    year: "2000"
}, {
    sales: "3.5",
    year: "2001"
}, {
    sales: "3.1",
    year: "2002"
}, {
    sales: "4.2",
    year: "2003"
}, {
    sales: "4.5",
    year: "2004"
}, {
    sales: "9.6",
    year: "2005"
}, {
    sales: "7.4",
    year: "2006"
}, {
    sales: "9.0",
    year: "2007"
}, {
    sales: "7.3",
    year: "2008"
}, {
    sales: "4.8",
    year: "2009"
}];
window.onload = function() {
    var barChart = new dhtmlXChart({
        view: "bar",
        container: "chart_container",
        value: "#sales#",
        label: "#year#",
        width: 30,
        padding: {
            bottom: 0,
            right: 0,
            left: 0;
        },
        gradient: true,
        border: false,
        color: function(obj) {
            if (obj.sales > 5)
                return "#FF0000";
            else
                return "#00FF00";
        }
    });
    barChart.parse(data, "json");
    var index = 1;
    var barChart2 = new dhtmlXChart({
        view: "pie",
        container: "chart_container2",
        value: "#sales#",
        label: "#year#",
        gradient: true,
        color: function(obj, ratio) {
            index++;
            if (index % 2)
                return "#FF0000";
            return "#00FF00";
        }
    });
    barChart2.parse(data, "json");
}
</script> <div id="chart_container" style="width:450px;height:300px;border:1px solid #A4BED4;float:left;margin-right:20px""></div> <div id="chart_container2" style="width:450px;height:300px;border:1px solid #A4BED4;"></div>