[GRASSLIST:10460] Re: mouse in gis.m (was: gis manager 2 rc3 - bug fixes and updates)

[David Finlayson]

It seems to me that putting together a nice set of shortcut keys as
Glynn suggested is the modern answer to your problem Maciek. For
example, in Inkscape you are working on a drawing and want to zoom.
You activate the zoom tool:

left click to zoom in.
shift + left click to zoom out.

drag left to zoom to area.

You can do this without hitting the zoom tool again. Really no
different than the three button thing now or typing d.zoom.

Inkscape also recignizes the middle scroll wheel as a quick zoom in and out:

CTRL + scroll up to zoom in
CTRL + scroll down to zoom out

So, in Inkscape if you have a one button mouse you're set. If you've
got a scroll-wheel mouse you get an even faster way to zoom. The key
is that it is usable by a wide variety of platforms and equipment.

David


On 2/20/06, Maciek Sieczka <werchowyna at epf.pl> wrote:
> Michael,
>
> Mouse thing seems a serious issue so I'll fork the thread.
>
> Below I'll explain in detail other reasons why I prefer 3 button zooming
> like in d.zoom. For gis.m zooming tool it would be good if it could
> reproduce the behaviour. It doesn't matter with how many buttons/keys.
>
>
> In gis.m currently one has to select _exactly_ the corner he wants
> right at the very first click. And right on the second click it zooms
> in. It is 99% sure I won't be satisfied with my first selection when
> my area to be zoomed is not a simple shape. So I'll need to unzoom
> (another tool) and zoom in back (another tool again). Maybe several
> times. Bad.
>
> Zooming out/in in d.zoom is very well designed, thoroughly thought. I
> can refine the area selection within one zooming session. Once the
> selection looks I confirm with middle. In case something went wrong
> - unzoom with middle, redo selection. To quit press right. All within
> one session. Efficient and elegant.
>
> Please try zooming to a non-regular shape, some European countries
> borders for instance. You'll see it is much easier with d.zoom.
>
> Another solution would be if your current gis.m zoom tool had a
> transparent "guidelines" following the cursor moves (sorry I can't think
> of a better description, is it clear what I mean?), so it would be
> possible to refine the zoom-in bounding box before performing the
> actual zoom. What do you think? But still unzooming within the same
> session will be missing. Using keyboard to change the +/- zoom
> direction would do.
>
> Maciek
>
> --------------------
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>
>


--
David Finlayson
Marine Geology & Geophysics
School of Oceanography
Box 357940
University of Washington
Seattle, WA  98195-7940
USA

Office: Marine Sciences Building, Room 112
Phone: (206) 616-9407
Web: http://students.washington.edu/dfinlays