[Kstars-devel] Zooming in KStars?

[Jason Harris]

Hi Jasem,

Yes, I agree actually.  My thinking at the time was that it would be 
more convenient because the common use case would be "I want to zoom in 
around Saturn, so I'll click near Saturn then drag until the size of the 
window is what I want".  I think it works well for that, but you are 
right that it is not what the user expects, and it's hard to get used to 
even after doing it many times.

So, options:

1) as you suggest, do corner-to-corner dragging.  The problem with this 
is, as you may have noticed with the current scheme, the drag rectangle 
maintains the same aspect ratio as the full SkyMap.  So, while the first 
corner will be placed where the user clicks, the other corner will not 
necessarily be under the mouse (the mouse will be along one of the 
edges).  This might be frustrating if the user can't put the center of 
the rectangle near the region of interest and get the size they wanted 
at the same time (that's why I did center-dragging actually).

2) Keep a center-start dragging scheme, but instead of a rectangle 
representing the new view, just draw a circle whose diameter will be the 
new width.  This way they still get to pick the center they want, with 
the right size, but their expectations aren't jarred by a rectangle that 
behaves in an unfamiliar way.

I'm leaning toward optin 2.  What do you think?

Jason

Jasem Mutlaq wrote:
> Hello Jason,
> 
> One thing that I noticed _long time_ ago but I always
> forget to mention is zooming in KStars by selection.
> That is, when the user presses Ctrl and then drags the
> mouse. 
> 
> The way is happens in KStars is kinda
> counter-intuitive. I think _most_ people expect the
> starting point to represent the TOP-LEFT coordinate of
> the rectangle they're about to form, not the
> bottom-right one. In all applications I've used, this
> is the expected behavior. It felt kinda awkward trying
> to use that feature in KStars!
> 
> What do you think?
> 
> Cheers,
> Jasem
> 
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