如何使用 jQuery 和 jQplot 为图表制作动画(更新数据)
随着时间的推移，我通过更改数据并重新绘制它们来动画化"图表.
I am "animating" diagrams over time by changing the data and redrawing them.
// initialization
var data = ...
var targetPlot = $.jqplot('#diagram', data, diagramOptions);
现在一段时间后，我将以某种方式更改数据并希望更新图表.以下解决方案有效:
Now after some time I will change the data in some way and want to update the diagram. The following solution works:
// update Data
targetPlot.data = ...;
// remove old diagram
$('#<%= "diagram" + diagram.id.to_s %>container').empty();
// redraw
targetPlot = $.jqplot('#diagram', data, diagramOptions);
这是一个完整的重绘.有大量数据和较短的时间间隔 jQPlot 会占用大量内存并且图表会闪烁.
Bit this is a complete redraw. With lots of data and a short intervall jQPlot takes much memory and the diagram is flickering.
如何正确地做到这一点?
How to do this correct?
对我来说使用redraw-function的解决方案只画了旧图:
The solution using the redraw-function for me only draws the old diagram:
// update Data
targetPlot.data = ...;
targetPlot.redraw();
推荐答案
这是我经过大量调查后发现的方式.我写下来是为了帮助阅读这个问题的人.
This is the way I found after lots of investigation. I am writing this down to help someone reading this question.
更新数据的正确位置在series属性中，更新数据后可以重绘绘图:
The correct place to update the data is in the series property, after updating the data you can redraw the plot:
targetPlot.series[0].data = myData;
targetPlot.redraw();
如果你的轴改变了，那么你可以使用 replot() 而不是 redraw() 来重新缩放它们:
If your axis changed, then you can rescale them by using replot() instead of redraw():
targetPlot.replot({resetAxes:true});
这比每次都重新绘制一个新图要快得多.
This is much faster than redrawing a new plot every time.
相关文章