From: piir@... (Todd Gardner)
Date: 2004-06-21T09:43:16+09:00
Subject: Re: Comparison of GLs for plotting (x,y,z) pts?

alex fenton <alex@delete.pressure.to> wrote in message news:<6dudnav0xY7PD0jdRVn-gw@eclipse.net.uk>...
> Todd Gardner wrote:
> 
> > My goal is to have my application plot arrays of (x,y) and possibly
> > (x,y,z) data points in "real time".  I would also like to write text
> > on the graphs.  I would like to ask for a knowledgeable comparison and
> > contrast of the multitudes of graphic utility libraries out there
> > capable of doing this seemingly SIMPLE plotting.
> 
> ...
> 
> > WxRuby - I don't know how to draw lines yet in this library.
> 
> In WxRuby you could use a Device Context to draw lines, points, fills, 
> ellipses, etc, plus text onto a frame. For a full list of methods 
> available see the WxWidgets docs:
> 
> http://www.wxwidgets.org/manuals/2.4.2/wx105.htm#wxdc
> 
> I haven't used these classes in detail, so I don't know whether the 
> bindings are complete, but the following simple example worked for me 
> using wxruby-0.3.0 (current release is 0.4.0)
> 
> chrz
> alex
> 
> ---------------------------
> 
> require 'wxruby'
> 
> class MyDrawingFrame < Wx::Frame
>    def initialize(*args)
>      super(*args)
>      evt_paint { on_paint }
>    end
>    def on_paint
>      paint do | dc |
>        dc.clear
>        dc.draw_line( 0, 0, 50, 100)
>        dc.draw_line( 50, 100, 100, 75)
>        dc.draw_text( 'a label', 52, 102)
>      end
>    end
> end
> 
> class MyApp < Wx::App
>    def on_init()
>      frame = MyDrawingFrame.new(nil, -1, 'Drawing')
>      frame.set_client_size( Wx::Size.new(200,200))
>      frame.show()
>    end
> end
> 
> MyApp.new().main_loop()

Hello Alex, 

While that's pretty easy.  Thanks for showing me that!

Todd