[英]Animate change in piechart start angle with highcharts-ng
I'm using highcharts-ng to create a dynamically updated piechart. 我正在使用highcharts-ng创建动态更新的饼图。
When the data changes the slices animate (grow or shrink in size). 当数据更改时,切片将设置动画(大小增加或缩小)。 I am trying to achieve a similar effect with a regard to the start angle of the chart.
我试图在图表的起始角度上达到类似的效果。
When the startAngle property of a series changes I would like a transition animation to occur. 当系列的startAngle属性更改时,我希望发生过渡动画。 I don't know if this is possible.
我不知道这是否可能。
Here's a JSFiddle which shows the change in start angle, but without the animation. 这是一个JSFiddle,它显示了起始角度的变化,但是没有动画。
http://jsfiddle.net/367gjasq/2/ http://jsfiddle.net/367gjasq/2/
here's a snippet of code from the jsFiddle which shows how I'm currently updating the startAngle property of the chart 这是jsFiddle的代码片段,显示了我当前如何更新图表的startAngle属性
$scope.updateChartData = function() {
//access to highcharts, though not using currently
var h = $scope.chartConfig.getHighcharts();
//register a change in series start angle
$scope.chartConfig.series[1].startAngle += 20;
//to make demo better, restart inner donut start angle
if($scope.chartConfig.series[1].startAngle >= 0)
$scope.chartConfig.series[1].startAngle = -360;
//issue a digest so changes will reflect in chart
$scope.$digest();
};
I was not able to find a way to animate a change in start angle of the series. 我无法找到一种方法来动画化系列开始角度的变化。
What I settled on instead was creating a 'ghost' element of the series. 相反,我决定在系列中创建一个“幽灵”元素。 Here is my series element object
这是我的系列元素对象
{
name: 'empty',
//make element transparent
color: 'rgba(255, 255, 255, 0)',
//cursor does not change on hover
cursor: 'cursor',
//so legend element won't disrupt actual legend display
legendIndex: lastIndexOfLegend,
// takes up the total size of 'empty space' required
y: total - (aggregate)
};
I also had to change my tooltip formatter to watch for a point with the 'key' of 'empty' 我还必须更改工具提示格式化程序,以注意带有“空”键的点
if(this.key === 'empty')
return;
So no tooltip would display on hover 因此悬停时不会显示任何工具提示
and in my legend formatter 在我的图例格式化程序中
if(this.name === 'empty')
return '';
as returning nothing resolved to show undefined
in the legend 不返回任何结果以显示图例中
undefined
的内容
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