[ImageJ-devel] Masking @Parameter from GUI harvesting ?

[Adrian Daerr]

Dear ImageJ developers,

As I slowly learn more about IJ2 @Plugins, I have one question and 
three minor comments that I would like to submit to you.

1) How does one prevent a @Parameter from showing up in the harvesting
GUI dialog, in the manner of a '@Parameter LogService log'? (more 
below)

2) A net.imagej.overlay.RectangleOverlay parameter, although properly
populated, provoques an Exception after the execution of the command.
(more details and stacktraces below)

3) When a new preview is triggered, and that preview modifies numeric
parameters, then the numeric values visible in the gui dialog are
updated except for the NumericField on which input has triggered the
call to preview().

4) It would be nice if a parameter could have a label even if
ItemVisibility is MESSAGE:
   @Parameter(persist = false,
              visibility = org.scijava.ItemVisibility.MESSAGE,
              label = "Current foo value")
     private double foo = 0;
(currently, at least on my box, the label is not shown in this case)
Obviously a workaround is to build a String with label+foo instead.

cheers,
Adrian



ad 1)
How to prevent a @Parameter from showing up in the harvesting GUI
dialog? Some seem to be masked by default (ImagePlus, LogService), but
I did not find the appropriate annotation to make the parameter roi in
the following not show up, although it is already properly populated
by the rectangular selection of the active image ? There is no
meaningful thing I can do with the associated selector in the dialog.

     @Parameter private ImagePlus imp;
     @Parameter private RectangleOverlay roi;
     @Parameter private double a;


ad 2)
A net.imagej.overlay.RectangleOverlay parameter

   @Parameter private RectangleOverlay roi;

is properly populated when the Command is invoqued on an active image
containing a rectangular selection. However it provoques an Exception
after the execution of the command, when either the
DefaultPrefService, or the Recorder if a persist=false attribute is
added, apparently tries to record a 'null' value for an option. The
two stacktraces are

   [ERROR] Module threw exception
   java.lang.NullPointerException
	at 
java.util.prefs.AbstractPreferences.put(AbstractPreferences.java:224)
	at 
org.scijava.prefs.DefaultPrefService.put(DefaultPrefService.java:183)
	at 
org.scijava.module.DefaultModuleService.save(DefaultModuleService.java:278)
	at 
org.scijava.module.process.SaveInputsPreprocessor.saveValue(SaveInputsPreprocessor.java:74)
	at 
org.scijava.module.process.SaveInputsPreprocessor.process(SaveInputsPreprocessor.java:65)
	at org.scijava.module.ModuleRunner.preProcess(ModuleRunner.java:104)
	at org.scijava.module.ModuleRunner.run(ModuleRunner.java:156)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:126)
	at org.scijava.module.ModuleRunner.call(ModuleRunner.java:65)
	at 
org.scijava.thread.DefaultThreadService$2.call(DefaultThreadService.java:191)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

   [ERROR] Module threw exception
   java.lang.NullPointerException
         at ij.plugin.frame.Recorder.addQuotes(Recorder.java:612)
         at ij.plugin.frame.Recorder.recordOption(Recorder.java:362)
         at 
net.imagej.legacy.IJ1Helper.recordOption(IJ1Helper.java:467)
         at 
net.imagej.legacy.plugin.MacroRecorderPostprocessor.process(MacroRecorderPostprocessor.java:70)
         at 
org.scijava.module.ModuleRunner.postProcess(ModuleRunner.java:116)
         at org.scijava.module.ModuleRunner.run(ModuleRunner.java:176)
         at 
org.scijava.module.ModuleRunner.call(ModuleRunner.java:126)
         at org.scijava.module.ModuleRunner.call(ModuleRunner.java:65)
         at 
org.scijava.thread.DefaultThreadService$2.call(DefaultThreadService.java:191)
         at 
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
         at java.util.concurrent.FutureTask.run(FutureTask.java:138)
         at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
         at java.lang.Thread.run(Thread.java:662)