I am using a AngularJS module based on Chart.js to display graph. It works like a charm, but when I display a chart in a AngularJS tabset, the graph does not render if it is not the first tab.
<tabset>
<tab heading="Tab 1">
<!-- OK -->
<canvas class="chart chart-pie" data="[140, 160]" labels="['d1', 'd2']" legend="true"></canvas>
</tab>
<tab heading="Tab 2">
<!-- Does not render -->
<canvas class="chart chart-pie" data="[140, 160]" labels="['d1', 'd2']" legend="true"></canvas>
</tab>
</tabset>
This is the JSFiddle. Does anyone manage to fix this ?
Thanks
As @Martin pointed it out, it is an issue of Chart.js not showing the chart when initiliazed in a hidden DOM element (its height and width remain at 0px even after showing the hidden element).
This issue is tracked here.
I share you my home made solution if you are blocked by components like tabs initialized hidden. I have created a directive in which I compile the canvas element. In order to be able to refresh the element when needed (eg when the tab is opened), I watch an attribute I will manually change on tab change in my controller.
Here is my directive :
app.directive('graphCanvasRefresh', ['$compile', function($compile) {
function link(scope, elem, attrs) {
function refreshDOM() {
var markup = '<canvas class="chart chart-pie" id="graph" data="entityGraph.data" labels="entityGraph.labels" legend="true" colours="graphColours" ></canvas>';
var el = angular.element(markup);
compiled = $compile(el);
elem.html('');
elem.append(el);
compiled(scope);
};
// Refresh the DOM when the attribute value is changed
scope.$watch(attrs.graphCanvasRefresh, function(value) {
refreshDOM();
});
// Clean the DOM on destroy
scope.$on('$destroy', function() {
elem.html('');
});
};
return {
link: link
};
}]);
Dirty as hell, but this is a working solution you can use waiting for Chart.js update. Hope it can help someone.