如何使用jQuery和jQplot动画图表(更新数据) [英] How to animate diagrams with jQuery and jQplot (updating data)
问题描述
我通过更改数据并重新绘制它来动画图表。
I am "animating" diagrams over time by changing the data and redrawing them.
// initialization
var data = ...
var targetPlot = $.jqplot('#diagram', data, diagramOptions);
过了一段时间后,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。由于有大量数据和短暂的间隔,jQPlot占用大量内存并且图表闪烁。
Bit this is a complete redraw. With lots of data and a short intervall jQPlot takes much memory and the diagram is flickering.
如何做到这一点?
使用redraw-function的解决方案仅绘制旧图:
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。我写这篇文章是为了帮助有人阅读这个问题。
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是在series属性中,更新数据后可以重绘图:
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();
如果您的轴已更改,则可以使用 replot()重新缩放它们
而不是 redraw()
:
If your axis changed, then you can rescale them by using replot()
instead of redraw()
:
targetPlot.replot({resetAxes:true});
这比每次重绘新情节要快得多。
This is much faster than redrawing a new plot every time.
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