Utilizing Google Charts within your Ionic application: Tips and Techniques to Get Started

Have you ever struggled with using Google charts in an Ionic app? I'm facing a blank page issue when testing my app in the browser. Can anyone point out what's wrong here?

This is how my app.js file is structured:

angular.module('testGC', ['ionic', 'googlechart', 'googlechart-docs'])

.run(function($ionicPlatform) {
  $ionicPlatform.ready(function() {
    if(window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
      cordova.plugins.Keyboard.disableScroll(true);
    }
    if(window.StatusBar) {
      StatusBar.styleDefault();
    }
    });
    })

.controller("GenericChartCtrl", function ($scope) {
    $scope.chartObject = {};

    $scope.chartObject.type = "BarChart";

    $scope.chartObject.data = {"cols": [
        {id: "t", label: "Topping", type: "string"},
        {id: "s", label: "Slices", type: "number"}
    ], "rows": [
        {c: [
            {v: "Mushrooms"},
            {v: 3},
        ]},
        {c: $scope.onions},
        {c: [
            {v: "Olives"},
            {v: 31}
        ]},
        {c: [
            {v: "Zucchini"},
            {v: 1},
        ]},
        {c: [
            {v: "Pepperoni"},
            {v: 2},
        ]}
    ]};

    $scope.chartObject.options = {
        'title': 'How Much Pizza I Ate Last Night'
    };
    });

Here's a snippet from my index.html file:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
        <title></title>

        <link href="lib/ionic/css/ionic.css" rel="stylesheet">
        <link href="css/style.css" rel="stylesheet">

        <!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
        <link href="css/ionic.app.css" rel="stylesheet">
        -->

        <!-- ionic/angularjs js -->
        <script src="lib/ionic/js/ionic.bundle.js"></script>

        <!-- cordova script (this will be a 404 during development) -->
        <script src="cordova.js"></script>

        <script src="https://cdnjs.cloudflare.com/ajax/libs/angular-google-chart/0.1.0/ng-google-chart.min.js" type="text/javascript"></script>


        <!-- your app's js -->
        <script src="js/app.js"></script>

    </head>
    <body>

        <ion-pane>
            <ion-header-bar class="bar-stable">
                <h1 class="title">Ionic Blank Starter</h1>
            </ion-header-bar>
            <ion-content ng-controller="GenericChartCtrl">
                <div google-chart chart1="sampleData" style="width: 100%;height:100%;border: 1px solid green;padding-bottom: 44px" class="has-footer">
                </div>
            </ion-content>
        </ion-pane>
    </body>
</html>

Answer №1

The chart is failing to render due to the following reasons:

  • ng-app directive is missing
  • The data provided for the chart ($scope.chartObject.data) contains undefined row data (refer to $scope.onions)
  • Invalid directive chart1 is specified in the declaration of the chart div element, and an undefined sampleData is bound

Updated index.html

<body ng-app="chartApp">
    <ion-pane>
        <ion-header-bar class="bar-stable">
            <h1 class="title">Ionic Blank Starter</h1>
        </ion-header-bar>
        <ion-content ng-controller="GenericChartCtrl">
            <div google-chart chart="chartObject" class="chart-container">
            </div>
        </ion-content>
    </ion-pane>
</body>

Updated app.js

angular.module('chartApp', ['ionic', 'googlechart'])

.controller("GenericChartCtrl", function ($scope) {
    $scope.chartObject = {};

    $scope.chartObject.type = "BarChart";

    $scope.chartObject.data = {
        "cols": [
            { id: "t", label: "Topping", type: "string" },
            { id: "s", label: "Slices", type: "number" }
        ], "rows": [
            {
                c: [
                   { v: "Mushrooms" },
                   { v: 3 },
                ]
            },
            //{ c: $scope.onions },
            {
                c: [
                   { v: "Olives" },
                   { v: 31 }
                ]
            },
            {
                c: [
                   { v: "Zucchini" },
                   { v: 1 },
                ]
            },
            {
                c: [
                   { v: "Pepperoni" },
                   { v: 2 },
                ]
            }
        ]
    };

    $scope.chartObject.options = {
        'title': 'How Much Pizza I Ate Last Night'
    };
});

Demo:Plunker

Answer №2

The reference in your template is set to an entity titled sampleData, whereas the script initializes an entity named chartObject. Additionally, there is a typo where you have chart1= instead of chart=.

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