Zoomer: add a user definable predicate for panning

[ichaus-we]

This commit adds a user-definable predicate for panning to the Zoomer plugin.

It allows to replace the default predicate (middle mouse button) to something else, like it was possible with the now removed Panner plugin.

Sample code:
zoomer.setPanMouseFilter(event -> MouseEventsHelper.isOnlyPrimaryButtonDown(event) && MouseEventsHelper.isOnlyCtrlModifierDown(event));

This is demonstrated in a new chart in the ZoomerSample.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (7164e6b) 48.09% compared to head (27a078b) 48.07%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #631      +/-   ##
============================================
- Coverage     48.09%   48.07%   -0.02%     
+ Complexity     6224     6219       -5     
============================================
  Files           374      374              
  Lines         38304    38309       +5     
  Branches       6117     6117              
============================================
- Hits          18422    18417       -5     
- Misses        18727    18732       +5     
- Partials       1155     1160       +5     

Files	Coverage Δ
.../main/java/io/fair_acc/chartfx/plugins/Zoomer.java	25.87% <20.00%> (-0.06%)	⬇️

... and 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[wirew0rm]

Thanks for this nice improvement, looks good!

From my pov the now unused predicate could also have been directly removed instead of deprecated, but we can also do that after the next release.