Re: mouse zoom centred on mouse position.

[<pl...@pi...>]

On 06/20/12 07:46, Petr Mikulik wrote:
>>> just a quick idea to throw into the air: I was using cntl-mouse_scroll
>>> to zoom in and out on  a long data series and found myself having to
>>> adjust left and right.
>>>
>>> What  some graphics programs (and ggogleearth) do in this situation is
>>> to zoom on the mouse position.  This is a major improvement.
>>>
>>> Put the mouse over the point of interest and zoom in and out. The point
>>> of focus under the mouse stays in the same position and the rest scales
>>> and shifts around it.
>>
>> There was a preliminary patch submitted that would do this:
>>     https://sourceforge.net/tracker/index.php?func=detail&aid=2972660&group_id=2055&atid=302055
>
> I would propose to revise mouse zooming to comply more with that used in map
> software (maps.google.com, mapy.cz etc.). Thus:
> - mouse wheel zooms around current mouse position (it could zoom around
>    center if mouse is outside graph border)
> - Shift-wheel would move graph up/down (as now without Shift)
> - Ctrl-wheel would move graph left/right (now with Shift)
>
> I find the current behaviour counterintuitive and thus actually not using it
> at all :-(
>
> ---
> Petr
>
>

Hi,

I'm not sure that one is more "intuitive" that the other but I have had 
the same experience. It may just be what I'm used to from another 
interface, may be not but I find the left/right scroll to be the 
opposite of what I expect.

It would seem to be preferable to have a de facto standard and in that 
sense I would suggest bowing to number of people who will be familiar 
the google interface.

I've been using the scrolling quite a bit this week and it is a great 
feature.  (Except for not mouse centring the zoom ;)  ).

I've just about retrained my brain to go the right was most of the time 
which probably means I'll mess up next time I use google.

Falling in line with big G would seem to be the way to go.

Peter.