Got it.

EigenPicture is cool.  Does it get the xy-coordinates of the mouse from 
sysdata?  Where is sysdata documented?


epd_g_mmove=: 3 : 0

'x y w h'=. 4 {. 0 ". sysdata

y=. h - y

rim=. unitvec (x,y) - -: w,h

end=. rim + MATRIX mp rim

j=. (MX,MY) + rim * X1,Y1

pts=. flipypos 2 4$(MX,MY), j, j, (MX,MY) + end * X1,Y1

glsel 'g'

glclear''

drawframe ''

glpen 2 1

drawpin LASTPTS

setcolor EIGENCOLOR

glpen 2 1

drawpin pts

drawpic''

glpaint ''

LASTPTS=: pts

)



On 01/10/2018 02:23 PM, Raul Miller wrote:
> I have installed all addons, and I am going to presume you have also.
>
> When I go to the jqt Help menu, I can select Studio > Showcase... and
> this offers the demos:
>
> cities
> coins
> deoptim
> eigenpictures
> events
> isigraph
> isigrid
> life
> minesweeper
> plot
> solitaire
> unicode simple
>
> And, then, each of these demos has its own menu with further depth.
>
> Some quick searching shows that the underlying implementation for this
> demos node in the jqt ui is addons/demos/wd/demos.ijs
>
> If you do not see that, where does what you see differ?
>
> Thanks,
>
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