Re: [Nplot-devel] mouseover text on plot

[Ben G. <jes...@je...>]

Take a look at PhysicalAxis.WorldToPhysical. This will tranlate a world
(data) coordinate to the corresponding physical (screen) coordinate.

You can access the PhysicalAxis objects that were used for the most recent
Draw operation via PlotSurface2D.PhysicalXAxis1Cache (along with the other 3
axises).

To get a list of the data points themselves, I believe you can use
CandleDataAdapter.





On Tue, Jul 1, 2008 at 4:41 PM, MT <mt...@ya...> wrote:

> I am trying to create my own "hit test" but I cant figure out how figure
> out what the coordinates are of each individual data point in the series.
>  Any ideas where that info is stored?
>
> majid
>
> ----- Original Message ----
> From: Ben Gruver <jes...@je...>
> To: npl...@li...
> Sent: Tuesday, July 1, 2008 3:30:42 PM
> Subject: Re: [Nplot-devel] mouseover text on plot
>
> Ah, ok. I see your difficulty. I don't recall seeing any built-in way to
> determine if the cursor is over a data point. (Although that doesn't mean
> it's not there :)).
>
> Assuming it's not, you'll probably have to do your own "hit test" to
> determine this. There are various functions which allow you to translate
> between world and physical coordinates, which you may find helpful.
>
> I'm kinda surprised it doesn't have support for that.. I may just not have
> run across that functionality yet :)
>
>
> On Tue, Jul 1, 2008 at 3:00 PM, MT <mt...@ya...> wrote:
>
> > Thanks Ben for replying.  I did see that function in
> Windows.PlotSurface2D.
> >  However, how would I know if I am mousing over a chart series or not?
>  In
> > other words the mouse over will be different if I am hovering over a
> > candlestick vs if I am in empty space in the chart (i.e. not hovering
> over a
> > series)
> >
> > Any ideas?
> >
> >
> >
> > ----- Original Message ----
> > From: Ben Gruver <jes...@je...>
> > To: npl...@li...
> > Sent: Tuesday, July 1, 2008 2:33:04 PM
> > Subject: Re: [Nplot-devel] mouseover text on plot
> >
> > I think you'll need to modify the nplot source to do this, but it
> shouldn't
> > be difficult. Take a look at Windows.PlotSurface2D.DoMouseMove.
> >
> >
> >
> > On Tue, Jul 1, 2008 at 1:47 PM, MT <mt...@ya...> wrote:
> >
> > >
> > > Is there a way to change the mouseover text when hovering over a series
> > > element.  For example, if the mouse is over a candlestick, I would like
> > to
> > > display the high, low, open, close, volume, date value, etc..  It seems
> > that
> > > i can only display world coordinates.
> > >
> > > Thanks
> > >
> > > mt
> > >
> > >
> > >
> > >
> > >
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