Working with chart js and got it to do what I needed which is pull data from a webservice and use $interval to update it. When I update the chart using the built in update function it displays again as expected but with the old data in it as well. I thought I was clearing the data out of the array, I am newer to angular so maybe I overlooked something.
Here is the js for what is going on.
angular.module('myapp', [])
.controller('MainCtrl', function($scope, $http, $interval) {
$scope.doughnutData = [];
var myDoughnut = '';
onload = function() {
$http.get('http://ift.tt/1JOZRb4').success(function(returnedData) {
$scope.username = returnedData.name;
$scope.totalscore = returnedData.totalScore.toFixed(3);
returnedData.models.forEach(function(x) {
var score = x.score.toFixed(3);
console.debug(score);
if (score >= 75) {
$scope.doughnutData.push({
'value': x.score,
'color': '#F7464A',
'highlight': '#FF5A5E',
'label': x.name
});
} else if (score >= 50) {
$scope.doughnutData.push({
'value': x.score,
'color': '#FDB45C',
'highlight': '#FFC870',
'label': x.name
});
} else {
$scope.doughnutData.push({
'value': x.score,
'color': '#424242',
'highlight': '#686868',
'label': x.name
});
}
});
$scope.doughnutData = sortByKey($scope.doughnutData, 'value');
var ctx = document.getElementById("chart-area").getContext("2d");
myDoughnut = new Chart(ctx).Doughnut($scope.doughnutData, {
responsive: true
});
});
mainInterval = $interval(function() {
doughnutData = '';
$http.get('http://ift.tt/1JOZRb4').success(function(returnedData) {
$scope.username = returnedData.name;
$scope.totalscore = returnedData.totalScore.toFixed(3);
returnedData.models.forEach(function(x) {
var score = x.score.toFixed(3);
console.debug(score);
if (score >= 75) {
$scope.doughnutData.push({
'value': x.score,
'color': '#F7464A',
'highlight': '#FF5A5E',
'label': x.name
});
} else if (score >= 50) {
$scope.doughnutData.push({
'value': x.score,
'color': '#FDB45C',
'highlight': '#FFC870',
'label': x.name
});
} else {
$scope.doughnutData.push({
'value': x.score,
'color': '#424242',
'highlight': '#686868',
'label': x.name
});
}
});
$scope.doughnutData = sortByKey($scope.doughnutData, 'value');
myDoughnut.segments = doughnutData;
myDoughnut.update();
});
}, 5000);
$scope.$apply();
};
function sortByKey(array, key) {
return array.sort(function(a, b) {
var x = a[key];
var y = b[key];
return ((x < y) ? -1 : ((x > y) ? 1 : 0));
});
}
});
So it starts out with 9 values, and when it updates it has 18, etc.. There is nothing currently that will update (I just have it in there now for when I move it to my production webservice). I was thinking the doughnutData = ''; in the $interval section would clear it out?
Wanted to include the html as well to give a better idea of what is going on:
<html>
<head>
<script src="http://ift.tt/1Gufy1b"></script>
<script src="../Chart.js"></script>
<script src="../src/Chart.Doughnut.js"></script>
<script src="http://ift.tt/198QQJG"></script>
<link rel="stylesheet" href="style.css" />
<script src="../script.js"></script>
</head>
<body ng-app="myapp" ng-controller="MainCtrl">
<div id="canvas-holder">
<canvas id="chart-area" width="50" height="50"></canvas>
</div>
</body>
</html>
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