How to change colours for Angular-Chart.js

2019-01-11 06:38发布

站内问答 / JavaScript
480 7 4

I use Angular-Chart.js (the AngularJS Chart.js version) to create a bar chart. The Chart is working with the options except for the colours.

Even if I set them it is indicated in the documentation, they stay grey.

<div class="graph-display" ng-controller="chartController">
    <canvas class="chart chart-bar"
    data="bilans.data"
    labels="bilans.labels"
    series="bilans.series"
    options="{
        scaleShowHorizontalLines: true,
        scaleShowVerticalLines: false,
        tooltipTemplate: '<%= value %> $',
        responsive: true
    }"
    colours="{
    fillColor: 'rgba(47, 132, 71, 0.8)',
    strokeColor: 'rgba(47, 132, 71, 0.8)',
    highlightFill: 'rgba(47, 132, 71, 0.8)',
    highlightStroke: 'rgba(47, 132, 71, 0.8)'
    }"
    ></canvas>
</div>

Actually, the options are working but the colours are not. Am I doing something wrong?

7条回答
疯言疯语
2楼-- · 2019-01-11 07:02

With the latest version $scope.colors does not seem to work. You need to use chart-dataset-override="colors"

DEMO

angular.module("app", ["chart.js"]).controller("DoughnutCtrl", function ($scope) {
  $scope.results = {'1': 0, '2': 0, '3': 0, '4': 0, '5': 0, '6': 0, '7': 0, '8': 0, '9': 0, '10': 0};
  $scope.labels = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10'];
  
  $scope.data = [
    [1, 3, 5, 8, 9, 10, 11, 12, 33, 5]
  ];
  $scope.colors = [{ 
    fillColor: 'rgba(59, 89, 152,0.2)',
    strokeColor: 'rgba(59, 89, 152,1)',
    pointColor: 'rgba(59, 89, 152,1)',
    pointStrokeColor: '#fff',
    pointHighlightFill: '#fff',
    pointHighlightStroke: 'rgba(59, 89, 152,0.8)'
  }];
});
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Multi Slot Transclude</title>
  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.0-rc.0/angular.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular-chart.js/1.0.3/angular-chart.min.js"></script>
</head>
<body ng-app="app" ng-controller="DoughnutCtrl">
  <canvas
        class="chart chart-bar"
        chart-data="data"
        chart-labels="labels"
        chart-dataset-override="colors">
      </canvas>
</body>
</html>

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淡お忘
3楼-- · 2019-01-11 07:03

You wanted to say: "colours"

$scope.colours = ['#FD1F5E','#1EF9A1','#7FFD1F','#68F000'];

Also we can see the other attributes That we can change , like : legend , series, hover . Next to each chart you can see an option called "settings ", that's all what you can change.

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SAY GOODBYE
4楼-- · 2019-01-11 07:06

As at 2017 I got angular-charts to work with the following code.

  1. that the names of the elements are changed. Taken from the angular-chart source code.

  2. also that as soon as you run out of colours angular-chart will generate them for you. This includes an opacity of 0.2 for background colours.

  3. If you specify #hex colours opacity will be added.

Colour specification via global.

app.config(['ChartJsProvider', function (ChartJsProvider) {

// Using ChartJsProvider.setOptions('bar', { didn't seem to work for me.
// Nor did $scope.chartColors. Although I only tried that in the controller.
Chart.defaults.global.colors = [
  {
    backgroundColor: 'rgba(78, 180, 189, 1)',
    pointBackgroundColor: 'rgba(78, 180, 189, 1)',
    pointHoverBackgroundColor: 'rgba(151,187,205,1)',
    borderColor: 'rgba(0,0,0,0',
    pointBorderColor: '#fff',
    pointHoverBorderColor: 'rgba(151,187,205,1)'
  }, {
    backgroundColor: 'rgba(229, 229, 229, 1)',
    pointBackgroundColor: 'rgba(229, 229, 229, 1)',
    pointHoverBackgroundColor: 'rgba(151,187,205,1)',
    borderColor: 'rgba(0,0,0,0',
    pointBorderColor: '#fff',
    pointHoverBorderColor: 'rgba(151,187,205,1)'
  }
...

In the source code the colour picking code is currently. Colours set via Chart.js options are reset here (I didn't get this to work).

Pick colours as per angular-chart.js source code: 

  var colors = angular.copy(scope.chartColors ||
    ChartJs.getOptions(type).chartColors ||
    Chart.defaults.global.colors

Yes, if you don't specify an object, opacity is set for you. From angular-chart.js:

function convertColor (color) {
  if (typeof color === 'object' && color !== null) return color;
  if (typeof color === 'string' && color[0] === '#') return getColor(hexToRgb(color.substr(1)));
  return getRandomColor();
}
...
function getColor (color) {
  return {
    backgroundColor: rgba(color, 0.2),
    pointBackgroundColor: rgba(color, 1),
    pointHoverBackgroundColor: rgba(color, 0.8),
    borderColor: rgba(color, 1),
    pointBorderColor: '#fff',
    pointHoverBorderColor: rgba(color, 1)
  };
}
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5楼-- · 2019-01-11 07:08

As @pankajparkar said. Just adding that you can also pass html colours and angular-chart.js will define the colour objects properly in rgba with the proper nuances e.g. $scope.colors = ['#FD1F5E','#1EF9A1','#7FFD1F','#68F000'];

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Emotional °昔
6楼-- · 2019-01-11 07:10

I was having the same difficulty. In the docs it says to use "colors" however once I updated my html to:

chart-colours

with an angular array of:

$scope.colours = ['#72C02C', '#3498DB', '#717984', '#F1C40F'];

It worked!

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forever°为你锁心
7楼-- · 2019-01-11 07:11

It seems that naming changed again. I'm using angular-chart.js 1.0.3 and color management for bar charts works like this :

colors:[{
      backgroundColor:"#F00",
      hoverBackgroundColor:"#FF0",
      borderColor:"#0F0",
      hoverBorderColor:"#00F"
}];

In the canvas tag, the name of the attribute is chart-colors

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