Posted by
Michael Schmid on
Jul 27, 2020; 12:29pm
URL: http://imagej.273.s1.nabble.com/RoiManager-tp5023762p5023771.html
Hi Kenneth,
sounds to me like this could be best done with adding the rois to the
overlay.
You can have a special name for the rois added, to later remove them all
from the overlay and leave the rest of the overlay untouched:
overlay.add(Roi roi, String name)
https://github.com/imagej/imagej1/blob/master/ij/gui/Overlay.java#L42overlay.remove(String name)
https://github.com/imagej/imagej1/blob/master/ij/gui/Overlay.java#L73Before adding the roi, set the stack position:
roi.setPosition(int n)
https://github.com/imagej/imagej1/blob/master/ij/gui/Roi.java#L2092or if it is a multi-dimentional stack
roi.setPosition(int channel, int slice, int frame)
https://github.com/imagej/imagej1/blob/master/ij/gui/Roi.java#L2112For the gui part, the easiest would probably be a WaitForUserDialog
telling the user what to do and pressing 'ok' when done. For adding
single Rois, I'd add a KeyListener for the image canvas, and ask the
user to press some otherwise unused key for adding the ROIs.
https://github.com/imagej/imagej1/blob/master/ij/gui/WaitForUserDialog.javaMichael
________________________________________________________________
On 24.07.20 20:36, Kenneth Sloan wrote:
> I write Java plugins - mostly interactive data gathering applications. My Java skills are good, but my knowledge of ImageJ utilities is weak. I now have an application which looks like it is a direct application of ImageJ utilities about which I know nothing - in particular, the RoiManager.
>
> Given an (extension of a) StackWindow displaying an ImageStack (plus overlays which I prefer to not disturb), I would like to allow the observer to:
>
> a) draw Polygon ROIs (0, 1, or (if easy) many) in each slice
> b) freely browse through the stack, using the normal stack controls (plus other
> controls implemented in my extension) - with ONLY the Roi(s) associated with a
> particular slice displayed at each step
>
> So...can some kind soul please point me at the appropriate documentation, or sample Java code, that does something similar?
>
> The only user interaction with the top level program will be to say "done", or possibly to say "add this Roi".
>
> I was about to implement all of this "from scratch", but it occurs to me that (in the abstract) this is a common process.
>
> It *may* be desirable to compute (and display in another window) some information on the current slice (for example, the area of the Rois in that slice) - but this is optional.
>
> At the end, the plugin will analyze the collection of Rois and write a report file - which is why I need the "done" indication. If the "add/edit Rois while browsing the stack" can be isolated in a separate thread - a WaitForUserDialog() may be all I need at the top level.
>
> All clues gratefully rented.
>
> --
> Kenneth Sloan
>
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> Vision is the art of seeing what is invisible to others.
>
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