Re: Basic question about ROI positioning by Keyboard Arrows

Posted by Mario Faretta-2 on Aug 18, 2016; 4:57pm
URL: http://imagej.273.s1.nabble.com/Basic-question-about-ROI-positioning-by-Keyboard-Arrows-tp5017053p5017068.html

HI Michael,
thanks for the useful info.
The operations I described should occur during a macro execution: the
macro pastes an image into a calculated position, then, by calling the
waitForUser() function, the macro execution is suspended. The user can
consequently correct the positioning if necessary before the macro goes
on. I am not an expert so I was wondering if in these conditions the
ROI.endPaste is automatically called.
Thanks again for the help
Mario

I am not a programmer
On 2016-08-18 18:05, Michael Schmid wrote:

> Hi Mario,
>
> after pasting an image or image part, you should be able to move the
> pasted contents it until
> - you select a different image or a panel such as B&C
> (Brightness&Contrast) [the Threshold panel seems to do no harm], or
> - you do something that deletes the ROI, e.g. by clicking outside of
> it, or
> - there is something that modifies or could potentially modify your
> image.
>
> Technically speaking, for the last point, e.g. everything that
> implements the PlugInFilter interface causes a call to Roi.endPaste.
> This includes not only image modification operations but also many
> read-only operations, such as image analysis and saving.
>
> If you lose the capability to move the ROI contents after a paste
> operation without any obvious reason, what ImageJ & Java version and
> operating system do you have?
> (I have not seen such a problem with my computer so far, using ImageJ
> 1.51f; Java 1.6.0_65 [64-bit]; Mac OS X 10.6.8)
>
> Michael
> ________________________________________________________________
> On 2016-08-18 12:47, mfaretta wrote:
>> Hi everyone,
>> I have a very simple question about moving a rectangular ROI in an
>> image
>> using the keyboard.
>> The idea is to set the correct position where a second image has to be
>> pasted (in the first one).
>> Sometimes by using arrow keys I can move the selection to x and y
>> negative coordinate obtaining the correct positioning of the pasted
>> image.
>> However some other times after pasting the image and pressing the
>> arrows, I can only move the selection (and not the pasted image) until
>> the border without reaching negative values.
>> Thanks for the help
>> Mario
>>
>> Mario Faretta
>> Department of Experimental Oncology
>> European Institute of Oncology
>> via Adamello 16
>> 20139 Milan
>> Italy
>> Phone: [phone]
>> email: [hidden email]
>>
>>
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