Re: Graph Widget Development

[John Stowers <john stowers lists gmail com>]

On Wed, 2009-05-06 at 13:15 -0400, David Brigada wrote:
> Hello,
> 
> I am currently developing an X-Y graph widget that I think could someday 
> be included in GTK+.  I'd just like to get a little bit of feedback on 
> the design so that I don't start spinning my wheels in the wrong 
> direction.  My plan is to make the usage of GtkGraph similar to that of 
> GtkTreeView---they are both widgets that can show large amounts of data.

Are you aware of GtkDataBox [1]?

Regards

John

[1] http://www.eudoxos.net/gtk/gtkdatabox/

> 
> The widget would be GtkGraph (analogous to GtkTreeView).  This would 
> show axes, labels and numbers on the axes, and provide the drawing 
> region to show the plots on.  On the GtkGraph widget, application 
> programmers could add GtkGraphPlot objects (similar to 
> GtkTreeViewColumn), each of which would plot a single series of data. 
> The plot objects would be connected to two things, first a 
> GtkGraphRenderer (similar to GtkCellRenderer) that would determine how 
> to plot the data on the graph, and second a GtkTreeModel (usually a 
> GtkListStore or possibly a lightweight replacement that uses an array 
> instead of a linked list for backing) that provides the data that the 
> renderer uses to generate its plots.  Each GtkGraphPlot object would 
> also hold one or more column numbers indexing into the tree model.
> 
> At some point, when I'm done with a basic implementation of this, I'll 
> send an update with (a link to) the code to the list, if anyone's 
> interested in giving a brief review so that I can try to fit it better 
> to GTK+'s style.
> 
> Please let me know what you think about this idea.
> 
> Thanks,
> David Brigada
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