Adjusting dimensions in the angular-chart.js component

I am currently utilizing the angular module angular-chart.js and find it to be user-friendly and intelligent. However, I have encountered an issue where I am unable to modify the width and height of the charts. After some research, I came across a solution that involves specifying the chart size in the following manner:

var vm = $scope;
vm.labels = [];
vm.data = [];

CrudService.getData(selDate).$promise.then(
     function (response) {
       angular.forEach(response, function (val) {
          val.datum = $filter('date')(val.datum, 'dd.MM.yyyy');
          vm.labels.push(val.datum);
          vm.data.push(val.grade);
       });

       vm.dataChart = [vm.data];

       /* This is the key part for defining the size */
       vm.options = [
         {
            size: {
               height: 200,
               width: 400
            }
         }
       ];
       /************************************************/
    });

The view:

<canvas id="bar" 
        class="chart chart-bar" 
        chart-data="dataChart"
        chart-labels="labels"
        chart-click="onClick"
        chart-options="options">
</canvas>

Is there anyone familiar with how to specify the width and height in angular-chart.js?

Answer №1

After experimenting with different approaches, I can confirm that this solution is effective.

        <canvas id="bar"
                height="100"
                width="100"
                class="chart chart-bar" 
                chart-data="dataChart"
                chart-labels="labels"
                chart-click="onClick"
                chart-options="options">
        </canvas>

Another option is to specify the size using a CSS-class.

Answer №2

To include the <canvas> within a <div>, you can follow this structure:

<div style="height:300px;width:300px;">
    <canvas
            class="chart chart-radar"
            chart-data="$ctrl.data"
            chart-options="options"
            chart-labels="$ctrl.labels"></canvas>
</div>

I found that specifying the width and height properties directly in the div tag was more effective than other methods mentioned.

Answer №3

In order to adjust the height of charts based on the screen size, I implement the following code:

Within the controllers

$scope.chartHeight = window.innerHeight * 0.8;

Within the template

<canvas height="{{chartHeight}}" class="chart chart-line" data="sales.data" labels="sales.labels" series="sales.series"></canvas>

Feel free to utilize these snippets in your project.

Answer №4

The issue arises from the fact that the height and width attribute values are stored in the chart and do not get updated like the other attributes. To resolve this, you need to attach a listener to the create event and manually modify the height within the chart object.

HTML:

<canvas
    id="chart"
    class="chart chart-horizontal-bar"
    chart-data="chart.data"
    chart-labels="chart.data.labels"
    chart-series="chart.series"
    chart-options="chart.options"
    chart-colors="chart.colors"
    height="{{ compareChart.height }}"
    width="{{ compareChart.width }}"
></canvas>

JS:

$scope.$on('chart-create', function (event, chart) {
    chart.chart.height = $scope.chart.height;
});

One would anticipate $scope.chart.height changing during an AJAX request or any other data update trigger.

Answer №5

To render and display the chart, it utilizes the dimensions of the parent container while requiring it to have a relative position specifically for the chart canvas. Achieving responsiveness involves setting relative values for the container's size.

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