javascript Highcharts - 如何以编程方式切换图例项并确定选择了哪些项
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Highcharts - How to programmatically toggle legend items and determine which items are selected
提问by Markus Hay
So I have a couple of requests from our designers:
所以我们的设计师有几个要求：
1) Allow users to select/deselect all legend items via clicking a link outside the chart container. This means I need to programmatically toggle all items in the chart on or off, regardless if any are currently selected/deselected.
1) 允许用户通过单击图表容器外的链接来选择/取消选择所有图例项。这意味着我需要以编程方式打开或关闭图表中的所有项目，无论当前是否选择/取消选择任何项目。
2) Determine which particular legend items are selected (or enabled) in the chart so that we can generate another chart from the selections.
2) 确定在图表中选择（或启用）了哪些特定的图例项，以便我们可以从选择中生成另一个图表。
I don't see a way to do either using the API so I was wondering if anyone has come up with a possible solution for either (or both).
我没有看到使用 API 的方法，所以我想知道是否有人为其中一个（或两个）提出了可能的解决方案。
Thanks in advance for any guidance.
提前感谢您的任何指导。
回答by Strikers
Highcharts does allow us to toggle the legend states from outside.
Highcharts 确实允许我们从外部切换图例状态。
series[0].hide(); series[0].show();are provided by highcharts which we can use to implement the functionality you asked for.
series[0].hide(); series[0].show();由 highcharts 提供，我们可以使用它来实现您要求的功能。
here is a fiddle for your reference http://jsfiddle.net/gfNYk/1/
这是一个小提琴供您参考http://jsfiddle.net/gfNYk/1/
回答by c-urchin
series[i].visible is the property
series[i].visible 是属性
回答by Yush0
If you have a lot of series, hide()and show()can result in very bad performance. Alternatively you can use setVisible()on each series and redraw()at the end.
如果你有很多系列，hide()和show()会导致非常糟糕的性能。或者，您可以在每个系列上使用setVisible()并在最后使用redraw()。
$('#uncheckAll').click(function(){
var chart = $('#container').highcharts();
var series = chart.series;
for(i=0; i < chart.series.length; i++) {
series[i].setVisible(false, false);
}
chart.redraw();
});
$('#checkAll').click(function(){
var chart = $('#container').highcharts();
var series = chart.series;
for(i=0; i < chart.series.length; i++) {
series[i].setVisible(true, true);
}
chart.redraw();
});
to determine if a series is selected you can use the series.visibleproperty
要确定是否选择了系列，您可以使用series.visible属性
