Re: RFC: new features
- From: John Stowers <john stowers lists gmail com>
- To: gtk-devel-list gnome org
- Subject: Re: RFC: new features
- Date: Wed, 18 Jan 2012 09:11:50 +1300
[sorry for the resend, something ate my mail]
On Wed, 2012-01-11 at 20:38 -0800, Christian Hergert wrote:
> On Thu, 2012-01-12 at 03:59 +0100, Benjamin Otte wrote:
> > PLOTS
> > This is my personal pet peeve. I often have something I'd like to
> > quickly plot in GTK, but it always ends up being more complicated then
> > I thought, so I either stare at text or use Gnumeric to get my plots.
> > And all the other applications (like virt-manager or
> > gnome-system-monitor) that do plotting look rather crappy and their
> > plots don't provide a lot of features (no zooms, no tooltips with
> > actual values, no ability to expand or collapse certain parts).
> > However, is a plotting widget a useful addition to GTK? If it works
> > well, it would surely enable people to show lots of useful statistics
> > that we'd all be thankful for - collecting them is not hard after all,
> > but making their output useful is. I'm sure a lot of people would like
> > bandwidth graphs in NetworkManager, page load performance graphs in
> > Epiphany or an interactive bootchart. Even if it's "just" the
> > developers using it to improve the rest of the world.
> > That said, such a widget would need a simple interface - both in API
> > and UI, and I'm not seeing anybody working on that. But I'd be very
> > interested.
> The part I found frustrating while working on scrolling graphs was
> coming up with a good model for storing data points. Especially when you
> consider being able to graph different scales or modes of graphs. Say
> heatmap, 2d plot, 3d plot, etc. Linear or logarithmic scales, etc. And
> then also abstracting the look of the plot and the renderers.
Another +1 for plots, in particular a scrolling plot widget.
I maintain a bit of scientific software for University and they all use
real-time scrolling line charts. The basic requirements are
* good performance (Christians was the best performing of those I
* multiple traces
* independently (of incoming data) adjustable scrolling speed
* introspectable / usable from python
> MENU BUTTON
> A GtkButton that shows a menu when clicked (and handles positioning,
> etc). Some would just use a combobox, but I find them pretty different.
> You'll find this sort of "menu button" in various VMware products on
> Linux. (I know the fullscreen toolbar used to have it at least).
And this too (if you are describing the wrench menu on chrome for
 Access from python because they get used in association with numpy,
which is used for the static plots. In the end I chose to maintain a
fork of the old rtgraph pygtk package https://github.com/nzjrs/rtgraph
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