Diff operation on 2 tracks is giving " no point" in ycord value in selection info in Graph Track Operations

It looks like the "no point" is only for negative values.

We discovered this in 9.0.1 and reproduced it in 9.0.0.

Check IGBF-1344 for test graph files.

Log 11/19 -

'No point' is still appearing in 9.1.6.
Combed through the AbstractFloatTransformer and GraphGlyph.java to try and isolate instances where 'no point' should and should not come up in normal operations

Steps to replicate:

1) Open human genome (H_sapiens_Dec_2013)
2) Navigate to: chr1:0-550
3) Load the grapgWithNegative.bedgraph file (found in IGBF-1344)
4) Click the graphWithNegative.bedgraph track label to select it.
5) Click in the center of the graph where the values are negative.
6) Navigate to the selection info to display coordinates (noting y-coordinate as 'no point').

Potentially helpful suggestions:

• Make a short screencast video demonstrating the above steps
• Describe what the proper behavior should be in the comments text and/or in the video

Once you determine what the proper behavior should be:

• Search the code base for text "no point" to find code implementing the "no point" behavior
• Use debugger figure out the logic flow and identify places to implement a change

Fork Link: https://bitbucket.org/Inaylor01/integrated-genome-browser/src/IGBF-1342/

Tested jar on Mac.

The y coord value is now showing correctly for negative graph values.

However, I noticed that values that should read no point, where there is no y coord value (no graph data), now show as -1.0. The code change Irvin made makes sense to me, so I think there is some further digging required to identify why a value with -1.0 is being recorded where there is no graph data.

[~aloraine] - I'm unsure of whether we should move forward with a pull request or investigate further.

Nowlan Freese - Could you please review?

I requested a change to the code from Irvin.

Nowlan Freese - here are the changes.
Fork Link: https://bitbucket.org/Inaylor01/integrated-genome-browser/src/IGBF-1342/

Tested Irvin's dmg for 1342 on Mac using the attached bedgraph files.

Selection Info now shows "no point" where there is no data and negative values are showing correctly.
Single-Graph operations are working correctly and saving the bedgraph from IGB works correctly.

Recommend pull request.

Nowlan Freese - Here's the pull request: https://bitbucket.org/lorainelab/integrated-genome-browser/pull-requests/860/igbf-1342-diff-operations-on-2-tracks

Merged and master branch installers are built. Please test.

Tested master dmg on Mac 10.14.6 (18G7016)

Everything working correctly, nothing odd in the logs. Closing issue.