How to display Tooltip without hovering pie chart with Chart.JS

Question

I'm using AdminLTE and chart.js for pie charts. The question is, can i make the text visible for each arc in the pie chart without hovering mouse? I don't use legends because some chart have a lot of labels in it.

If you have any other ways to show the all text labels i would appreciate it.

This is my current script for all my pie charts

<script>    
                $(function () {
                    //-------------
                    //- PIE CHART -
                    //-------------
                    // Get context with jQuery - using jQuery's .get() method.
                    var pieChartCanvas = $('#pieChart').get(0).getContext('2d')
                    var pieChart       = new Chart(pieChartCanvas)
                    var PieData        = [<?php echo $isiData; ?>]

                    var pieOptions     = {                      
                    //Boolean - Whether we should show a stroke on each segment
                    segmentShowStroke    : true,
                    //String - The colour of each segment stroke
                    segmentStrokeColor   : '#fff',
                    //Number - The width of each segment stroke
                    segmentStrokeWidth   : 2,
                    //Number - The percentage of the chart that we cut out of the middle
                    percentageInnerCutout: 0, // This is 0 for Pie charts
                    //Number - Amount of animation steps
                    animationSteps       : 150,
                    //String - Animation easing effect
                    animationEasing      : 'easeOutBack',
                    //Boolean - Whether we animate the rotation of the Doughnut
                    animateRotate        : true,
                    //Boolean - Whether we animate scaling the Doughnut from the centre
                    animateScale         : false,
                    //Boolean - whether to make the chart responsive to window resizing
                    responsive           : true,
                    // Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
                    maintainAspectRatio  : true,

                    //String - A legend template
                    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>'
                    }

                    //Create pie or douhnut chart
                    // You can switch between pie and douhnut using the method below.
                    pieChart.Doughnut(PieData, pieOptions)
                })  
                </script>
<canvas id="pieChart" style="height:400px;"></canvas>

Answer 1

I've had a great time on google with this problem..

Basically the way other developers solve your problem was creating a plugin which makes all the tooltips show up after the render

I found a fiddle that fixes this problem..

The fiddle is not mine..

Credits goes to Suhaib Janjua

 // Show tooltips always even the stats are zero Chart.pluginService.register({ beforeRender: function(chart) { if (chart.config.options.showAllTooltips) { // create an array of tooltips // we can't use the chart tooltip because there is only one tooltip per chart chart.pluginTooltips = []; chart.config.data.datasets.forEach(function(dataset, i) { chart.getDatasetMeta(i).data.forEach(function(sector, j) { chart.pluginTooltips.push(new Chart.Tooltip({ _chart: chart.chart, _chartInstance: chart, _data: chart.data, _options: chart.options.tooltips, _active: [sector] }, chart)); }); }); // turn off normal tooltips chart.options.tooltips.enabled = false; } }, afterDraw: function(chart, easing) { if (chart.config.options.showAllTooltips) { // we don't want the permanent tooltips to animate, so don't do anything till the animation runs atleast once if (!chart.allTooltipsOnce) { if (easing !== 1) return; chart.allTooltipsOnce = true; } // turn on tooltips chart.options.tooltips.enabled = true; Chart.helpers.each(chart.pluginTooltips, function(tooltip) { tooltip.initialize(); tooltip.update(); // we don't actually need this since we are not animating tooltips tooltip.pivot(); tooltip.transition(easing).draw(); }); chart.options.tooltips.enabled = false; } } }); // Show tooltips always even the stats are zero var canvas = $('#myCanvas2').get(0).getContext('2d'); var doughnutChart = new Chart(canvas, { type: 'doughnut', data: { labels: [ "Success", "Failure" ], datasets: [{ data: [45, 9], backgroundColor: [ "#1ABC9C", "#566573" ], hoverBackgroundColor: [ "#148F77", "#273746" ] }] }, options: { // In options, just use the following line to show all the tooltips showAllTooltips: true } }); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.bundle.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div> <canvas id="myCanvas2" width="350" height="296"></canvas> </div> 

Answer 2

I use onclick event and bootstrap modal for this issue and disabled Tooltip.

        ,onClick: function(c,i) {
            e = i[0];
            var x_value = this.data.labels[e._index];
            var ID = x_value;
            var Type =1;


                $.ajax({
                            url: 'getsearchresults.asmx/ChartDetayGetir',
                            data: "{ 'ID': '" + ID + "',type:'"+Type+"'}",
                            dataType: "json",
                            type: "POST",
                            contentType: "application/json; charset=utf-8",
                            success: function (data) {

                            document.getElementById("modalheader").innerHTML = x_value;

                            document.getElementById("modalbody").innerHTML = data.d;

                            $('#myModal').modal();

                                    },
                            error: function (response) {
                                alert(response.responseText);
                            },
                            failure: function (response) {
                                alert('Failure');
                            }
                        });






        }