ROI handles

[Gabriel Landini]

On an image there is a rectangular ROI which I try to adjust it through the
handles (little rectangles at the corners and middle of the sides of the ROI).  
While in rectangular selection mode, the cursor changes from the normal cursor
into an "hand pointing" cursor when it approaches the handle. However I am
finding fiddly to select these handles as the buffer zone that influences the
change of cursor is quite small.

Is there a setting for this in IJ, or is this something controlled by the OS?

It know it is not mouse acceleration or pointer threshold adjustment I am
after (tried those and makes no difference), but the size of the 'buffer zone'
at which the handle gets selected. I have the feeling that if that zone is
larger, then selecting the handles would be easier.

Thanks for any suggestions.

Gabriel

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[Michael Schmid]

Hi Gabriel,

as far as I can see, the size of the 'grab zone' of the Roi handles is
hardcoded in Roi.isHandle(int sx, int sy), where the size is defined by
the size of the rectangle + 3 pixels.  For some of today's screens with
very high resolution, I agree that this is a bit smallish.

Michael
________________________________________________________________
On 2016-07-19 16:01, Gabriel Landini wrote:

> On an image there is a rectangular ROI which I try to adjust it through the
> handles (little rectangles at the corners and middle of the sides of the ROI).
> While in rectangular selection mode, the cursor changes from the normal cursor
> into an "hand pointing" cursor when it approaches the handle. However I am
> finding fiddly to select these handles as the buffer zone that influences the
> change of cursor is quite small.
>
> Is there a setting for this in IJ, or is this something controlled by the OS?
>
> It know it is not mouse acceleration or pointer threshold adjustment I am
> after (tried those and makes no difference), but the size of the 'buffer zone'
> at which the handle gets selected. I have the feeling that if that zone is
> larger, then selecting the handles would be easier.
>
> Thanks for any suggestions.
>
> Gabriel
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[Gabriel Landini]

On Tuesday 19 Jul 2016 17:19:47 Michael Schmid wrote:
> Hi Gabriel,
>
> as far as I can see, the size of the 'grab zone' of the Roi handles is
> hardcoded in Roi.isHandle(int sx, int sy), where the size is defined by
> the size of the rectangle + 3 pixels.  For some of today's screens with
> very high resolution, I agree that this is a bit smallish.
 
Thanks Michael for the insight.
Maybe Wayne can be tempted to include an option to enlarge this? (hint, hint!
:-) )

Cheers

Gabriel

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[Rasband, Wayne (NIH/NIMH) [E]]

> On Jul 19, 2016, at 10:01 AM, Gabriel Landini <[hidden email]> wrote:
>
> On an image there is a rectangular ROI which I try to adjust it through the
> handles (little rectangles at the corners and middle of the sides of the ROI).  
> While in rectangular selection mode, the cursor changes from the normal cursor
> into an "hand pointing" cursor when it approaches the handle. However I am
> finding fiddly to select these handles as the buffer zone that influences the
> change of cursor is quite small.
>
> Is there a setting for this in IJ, or is this something controlled by the OS?
>
> It know it is not mouse acceleration or pointer threshold adjustment I am
> after (tried those and makes no difference), but the size of the 'buffer zone'
> at which the handle gets selected. I have the feeling that if that zone is
> larger, then selecting the handles would be easier.

In the latest ImageJ daily build (1.51e36), the ROI handle “grab zone" is larger (5 pixels instead of 3) if the screen is wider than 1280 pixels.

-wayne


--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html