CODEWITHSUNDEEP
androidachartengine
Umesh
Umesh

Reputation: 4256

Show all points on graph while panning along x axis

I am using achartengine(God bless the folks behind this) for data that my application is continuously receiving over a socket connection. The point are plotted against time which is my x axis. To achieve a moving graph i am having to remove items from the TimeChart if the count goes beyond 20.

timeSeries.add(Float.parseFloat(xAxisData), yAxisData);
if(timeSeries.getItemCount() > 20){
    timeSeries.remove(0);
}

So far so good.
But now the problem is that if a user pans through the graph and wants to see some of the older points the graph does not show them. Understandably so because i have already deleted those points from the TimeSeries.

So the question is how to show the older data when i pan through the graph along the X axis?

Is there an alternative way to give a the graph a moving effect other than deleting points from the TimeSeries because i understand if the TimeSeries hold all the point my problem will be solved?

Upvotes: 2

Views: 338

Answers (1)

Dan D.
Dan D.

Reputation: 32391

There is an alternative. Whenever you want the graph to "move", just call the methods below and then do a repaint:

renderer.setXAxisMin(minVisibleValue);
renderer.setXAxisMax(maxVisibleValue);
chartView.repaint();

Upvotes: 2

Related Questions