[GRASS-dev] Re: gis.m zooming: 2 new bugs

[Maciej Sieczka]

Moritz wrote:

>> Well, this is not really using the zoom-out box the way it should be: in
>> zoom-out mode, you draw a box to show at which size you would like the
>> currently displayed portion to be after zooming. So if you draw a box
>> which is larger then the currently displayed portion, you actually are
>> zooming in...
>>
>> So, in my eyes this is not really a bug, but maybe there could be a
>> check and a warning: "WARNING: your zoom-out box cannot be larger than
>> the currently displayed region" or something like this.

Michael wrote:
> Moritz is correct. AFAICT from the animation (which is quite helpful, by the
> way), the zoom out box is working exactly as it should. The region is
> "shrinking" to fit in the box.

I absolutely don't agree. Re-do the situation but use area zoom-IN
instead of zoom-OUT. In spite that you select an area *outside* your
initial display extent, the result looks OK - the extent is changed as
well as the zoom level.

With either zoom-out or zoom-in, if I include an area outside of my
current display extent within the zooming rectangle, the resulting
region should include this area too. Currently zoom-in does it, while
zoom-out does not. The difference makes tools bahave inconsistently.
Zoom-in works OK while the zoom-out behavior is counter-intuitive and
should be regarded as an usability bug.

> Given the zooming situation, the result looks weird.

Because the tool works weird. If it worked OK, the result would look OK.

Maciek