CODEWITHSUNDEEP
iosanimationcore-plot
Nathan
Nathan

Reputation: 7032

Can I animate the range of a Core Plot scatter graph?

I have a Core Plot scatter plot in an iOS app that I'm using to show some data. When the view loads I calculate the ideal ranges for the plot to fit its data on screen. I allow the user to zoom and pan, but include a button to return the graph to those ideal ranges.

The button works and the ranges change appropriately, but the change can be a bit jarring. One loses their mental 'map' of the plot because of the abrupt change. It would be much nicer to animate the pan and scale as necessary, like maps apps do.

I didn't see anything built into Core Plot that allows animation of this, but I may have missed something. Is there a way to do this with Core Plot (or a fork of it) or a reasonably easy way to do it manually?

Upvotes: 2

Views: 1092

Answers (2)

mohlman3
mohlman3

Reputation: 311

In case anyone is wondering about this now, Eric's fix has been put in place and you can now animate a range using the following code:

CPTPlotRange *xRange = [CPTPlotRange 
                        plotRangeWithLocation:CPTDecimalFromDouble(location) 
                                       length:CPTDecimalFromDouble(length)];

[CPTAnimation animate:plotSpace // CPTPlotSpace *
             property:@"xRange"
             fromPlotRange:plotSpace.xRange
             toPlotRange:xRange
             duration:5.0
             withDelay:0
             animationCurve:CPTAnimationCurveCubicInOut
             delegate:nil];

Upvotes: 5

Eric Skroch
Eric Skroch

Reputation: 27381

The best solution available for now involves using a timer to adjust the range in small steps. I'm working on a more general solution, but it's not ready to include in the public code yet. Watch the status on Core Plot issue #398 to find out when the fix becomes available.

Upvotes: 1

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