Re: plotting question

[Russell Shaw <rjshaw iprimus com au>]

francex tiscali it wrote:
> Hi,
>
> I must insert in my application 2 graphic types:
>
> 1) X-Y Axis to plot points in realtime (or with delay).
>
> 2) A timeline scrolling (seconds) from left to right that plots points.
>
> Could be sufficient using Canvas/Drawing in Gnome/GTK (do you know examples?)
> or is it necessary/advisable use external libraries? Eventually what are
> this libraries?

If you implement some panning functions that transform window coordinates to
sensible graphing coordinates, you can plot on to a gtk drawing area and have
a timer thread to pan the graphics like a chart recorder, by scheduling 'expose'
events. You can do it all in gtk.