Re: Zooming what ?

[Lars Clausen <lrclause cs uiuc edu>]

On Wed, 16 Jul 2003, Krzysztof Foltman wrote:
> Ian Epperson wrote:
> 
>>The Visio zoom tool would zoom on wherever your mouse was pointing.  Very
>>nice to be able to (ctrl-wheeldown) zoom out, point to a region
>>(ctrl-wheelup) zoom into somewhere else.  No panning needed.
>>
> With the old method, you can stop using panning, but if you zoom in
> once, the graph item under mouse pointer may be different than before
> zooming (the before-zoom item is now in the middle). Advantages: no
> panning needed ever (the requested item is now in the
> middle). Disadvantages: if you want to zoom in again, you need to move
> cursor to the middle, otherwise you'll zoom into different part of
> graph than intended.
> 
> With "my"  method, the part of the graph pointed by cursor is the same
> before and after zoom. Advantages: you can zoom in and out, and you're
> still pointing the same graph item. Disadvantages: you need to pan if
> the item you want to zoom into is in the corner, otherwise the zoomed
> item is still in the corner.

I do like your method better.  With the current method, there's a sense of
"where'd it go?" when zooming.  In particular, if you're looking at a
diagram from far out, and want to zoom into an object at the edge (taking
two or three zooms to get there), you can end up entirely outside the
diagram if you just click away.  I'd rather have zoom preserve the clicked
point and then add a 'Center Selected' menu item.

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause)| HĂ„rdgrim of Numenor
"I do not agree with a word that you say, but I   |----------------------------
will defend to the death your right to say it."   | Where are we going, and
    --Evelyn Beatrice Hall paraphrasing Voltaire  | what's with the handbasket?