I use php codeigniter and I create pie chart using javascript. and database data pass using json encode. My problem is how I use legend. for pie chart and title.
javascript
var pieData = [
{
value: sales_data[i].ans,
color:"#FF0000"
},
{
value : sales_data[i].noans,
color : "#006400"
},
{
value : sales_data[i].reans,
color : "#191970"
}
,
{
value : sales_data[i].noreans,
color : "#FFEA88"
}
];
// get pie chart canvas
var countries=document.getElementById("countries").getContext("2d");
// draw pie chart
new Chart(countries).Pie(pieData, pieOptions);
}
}
});
Give this a shot -
legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><%
for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:
<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%>
<%=segments[i].label%><%}%></li><%}%></ul>"
Include this as part of your pieOptions.
Refer this documentation of chart.js for more details on how to use chart.js. For legends there dosent seem to be a simple way but you have an option to give label to each segment in your piechart which will act as your legend.
var myPieChart = new Chart(ctx[0]).Pie(data,options);
var data = [
{
value: 300,
color:"#F7464A",
highlight: "#FF5A5E",
label: "Red",
labelColor : 'white',
},
{
value: 50,
color: "#46BFBD",
highlight: "#5AD3D1",
label: "Green",
labelColor : 'white',
},
{
value: 100,
color: "#FDB45C",
highlight: "#FFC870",
label: "Yellow",
labelColor : 'white',
}
]
In this the label acts as your map legend and it looks like the example fiddle piechart using chart.js
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