Re: Tweak for interactive SVGs?

[James R. V. Z. <jr...@co...>]

Ethan A Merritt <merritt@u.washington.edu> writes:
>
> On Saturday 27 December 2008, James R. Van Zandt wrote:
> > 
> > I think these would be useful functions for a selected curve:
> >  - Toggle visibility (as Bill demonstrated).
> >  - Move to front/back.
> >  - Dim (partially desaturate, or just turn light gray) / restore.  
> >  - Highlight (move to front, and dim all the other curves) / restore.
> >  - If X2 or Y2 axes are in use, then when you select a curve, it would
> >    be nice to have the corresponding axes automatically highlighted.
>
> What sort of user interface would this functionality use?
>
> Would it be possible to implement popup menus for all the interactive
> terminals?  
> svg - easy if you have already commited to using jscript or the like.
> wxt - there is an extension that allow this, but it is very crude
> x11 - not without pulling in some additional toolkit layer
> win - no idea
>
> Or perhaps we could add a clickable icon to each key entry?
> 1st click toggles off, 2nd click brings it back at dim/grey,
> 3rd click highlights, 4th click returns it to the original state

I like this concept of cycling among the choices with clicks (though I
think the first click should highlight).

> > I would also like a way to select a data point on the graph and
> > display information about it.  In particular:
> > 
> >  - The X, Y (Z, T, U, V) data value, with full precision (not
> >    transformed to integer screen coordinates then transformed back).
> >    Also DX and DY for errorbars graphs.
> > 
> >  - Where it came from (file name, line, index, line within index,
> >    etc.).  Useful for tracking down an outlier.
> > 
> > If there are several data points very close together (say, within an
> > eight pixel radius), I would like a way to cycle among them.

For drilling down to a particular data point, one could click at or
near it.  The software would scan the data points until finding one
within an N pixel radius, and pop up a window with data about that
point.  For the next click it would restart its scan where it left off
the last time, so all the nearby data points are eventually visited.

            - Jim Van Zandt