A scatter chart that preserves the order of the XY data pairs

[gjpc]

This is a feature request. It would be nice to have a scatter chart that does not throw out the order that the XY pairs are placed into the data set for the expediency of speed. This will prevent non ascending ordered XY pairs from disappearing from the chart while zooming and panning.

[danielgindi]

Would you care to try to implement? Extending or duplicating the existing ScatterChart would be a great start ;-)

[gjpc]

Sure Daniel,

I already have a working version in my branch https://github.com/gjpc/ios-charts

Would it be more helpful to you if I rename the object to IindependentScatterChart so you may merge it without effecting the original? This way if you use the chart you know you are going to take the speed hit and I don;t have to add code to do the breaks.

I also added the option to draw the lines between non-ordered pairs. You can see a sample in my branch's README.ME.

[danielgindi]

Yes of course!

[gjpc]

Hi Daniel. Please excuse my unfamiliarity with git hub, I did not mean to push anything into your repo I was trying to update my repo to your latest revisions. I have updated my branch with what I think is your upstream master branch as of the time of this comment. I have no changes in existing Charts files, just added the IndependentScatter* swift files and of course the Charts project file.

I modified the demo project adding IndependentScatterChart.

I think my branch is ready to merge with the main. But I have no idea how to do this. Please advise.

[gjpc]

I released a better demo today on my branch https://github.com/gjpc/ios-charts

[gjpc]

@danielgindi I extended the lines to the axis of there is an out of viewport data point as per #130 (comment)