Re: intermittent problem with NonBlockingGenericDialog

Posted by Wayne Rasband-2 on
URL: http://imagej.273.s1.nabble.com/intermittent-problem-with-NonBlockingGenericDialog-tp5023524p5023526.html

> On Jun 15, 2020, at 4:03 PM, Fred Damen <[hidden email]> wrote:
>
> Greetings Kenneth,
>
> I see two issues here. The NonBlockingGenericDialog, by way of
> GenericDialog being its super class, insists on setting one on the
> ImageWindow(s) as the GUI parent.

The NonBlockingGenericDialog class in the ImageJ 1.53c42 daily build has a

    NonBlockingGenericDialog(String title, Frame parent)

constructor.

-wayne

> This causes this ImageWindow to be
> raised, in my case at least, and possibly other things in your case.  I
> suspect that this is the source of the intermittency of your issue. It
> would be nice if NonBlockingGeneriDialog had a constructor that takes a
> Frame and passes it to the GenericDialog super class as the intended
> parent.  In my case setting the parent to IJ.instance would alleviate my
> issue.
>
> From your functional description I assume that your widgets are being
> disabled (which should appear as greyed out), but from you visual
> description (not highlighted) it would seem that they are not receiving
> focus.  This may be useful distinction when trying to debug this issue.  I
> do not experience what you describe, although I suspect it is specific to
> the OS/GUI.
>
> What I have done to avoid this annoyance is to create a benign ImageWindow
> and have that window current when I start up my NonBlockingGenericDialog.
>
> Fred
>
> On Mon, June 15, 2020 12:10 pm, Kenneth Sloan wrote:
>> I am in the wonderful position of having to deal with an INTERMITTENT
>> problem.  Even worse,
>> the problem seems to occur more frequently on one of my "client" machines
>> - but not so much on my development machine.
>>
>> Both are 2019 macBook Pro laptops, running the latest Mac OSX and ImageJ
>> 1.52r.
>>
>> The problem is that *sometimes* (my client reports "roughly every second
>> time") when a dialog box is displayed, it is not possible to edit any of
>> the fields.  Nothing is highlighted, and clicking on the window has no
>> effect (I think).
>>
>> The good news is that most of the time, he wants to accept the (remembered
>> in Preferences) previously set values, and merely needs to hit Enter - and
>> all is well.
>>
>> So...I'm unlikely to spend a LOT of time worrying about this, but I
>> thought I would report it just in case it rings any bells with anyone
>> else.
>>
>> Has anyone else seen this kind of problem?
>>
>> Does anyone know what the cause might be?
>>
>> For context, the relevant plugin displays an image, asks you to select a
>> rectangular region, and then displays a NonBlockingGenericDialog with many
>> parameters (some numbers, some text, one checkbox).  The symptom is that
>> *sometimes* none of the fields are highlighted, and nothing seems to be
>> able to change that.  The dialog can be *accepted* - but not updated.
>>
>> I'm stumped.

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