Re: Using Pixbufs and Pixmaps

[Torsten Schoenfeld <kaffeetisch gmx de>]

Travis Boucher wrote:

> My imaginary API would look something similar to this:
>
> my $graph = MyGraphClass->new(); $window->add($graph);
>
> $graph->add_object(MyGraphClass::Candlestick->new($graph, $open, $close,
> $high, $low, $timestamp)); 
> $graph->add_object(MyGraphClass::TrendLine->new($graph, $ts1, $val1, $ts2,
> $val2)); $graph->add_object(MyGraphClass::Text->new($graph, "Hello World",
> $timestamp_anchor, $value_anchor)); ... for every object on the graph
>
> Each MyGraphClass::XXX class would inherit from a base 'MyGraphClass::Item'
> class which would emit events for mouse overs, clicks, etc.
>
> The main MyGraphClass class would call a render method for each object, which
> would pass back a Pixmap?/Pixbuf? which would then be rendered onto the main
> drawable widget for the graph.  I'd like to extend this eventually to include
> a number of different types of objects on the graph including animations.

This sounds like you want to reinvent a canvas.  Take a look at Gnome2::Canvas 
or Goo::Canvas.  Or maybe you can even use an existing charting library?  Take a 
look at Chart::Clicker, for example.

-Torsten