SVG Canvas

ruby-talk
1

I've been looking for a couple of days now and I can't find a library
for svg graphics with a canvas object so I can make a financial
charting application(stand alone, not web based), is there such a
thing? maybe I'm missing something obvious.
Best regards,
Steven

2

Steven Quinones-Colon wrote:

I've been looking for a couple of days now and I can't find a library
for svg graphics with a canvas object so I can make a financial
charting application(stand alone, not web based), is there such a
thing? maybe I'm missing something obvious.

Most of the available GUI libraries support graphics. I have been using the
Qt library for this sort of thing, and the graphics are quite acceptable:

http://localhost/ruby/graphinity/index.html

http://localhost/ruby/gravity/index.html

I have only used the Qt library, there are several others, most of them
offer this sort of graphic library. It's not necessary to create a GUI in
order to use the graphic libraries they offer.

If you were planning to create a GUI to go along with your graphic images,
then this approach makes even more sense.

···

--
Paul Lutus
http://www.arachnoid.com

3

http://www.simplesystems.org/RMagick/doc/rvgtut.html

···

On Dec 13, 2006, at 6:33 PM, Steven Quinones-Colon wrote:

maybe I'm missing something obvious.

--
Julian 'Julik' Tarkhanov
please send all personal mail to
me at julik.nl

4

I haven't tried it at all, but there are Ruby bindings for the Cairo library (http://cairographics.org/rcairo\) which should produce really nice output.

Cheers,

Pete Yandell

···

On 14/12/2006, at 4:33 AM, Steven Quinones-Colon wrote:

I've been looking for a couple of days now and I can't find a library
for svg graphics with a canvas object so I can make a financial
charting application(stand alone, not web based), is there such a
thing? maybe I'm missing something obvious.
Best regards,
Steven

5

Hi,

In <73800bf00612130933y3687294fp709276366a686fa7@mail.gmail.com>
  "SVG Canvas" on Thu, 14 Dec 2006 02:33:44 +0900,

···

"Steven Quinones-Colon" <stevenq1967@gmail.com> wrote:

I've been looking for a couple of days now and I can't find a library
for svg graphics with a canvas object so I can make a financial
charting application(stand alone, not web based), is there such a
thing? maybe I'm missing something obvious.

If you want to only show SVG, the following example will
help you:

  CVS Info for project ruby-gnome2

If you want to output your chart to screen and SVG file, the
following small script will help you:

====
#!/usr/bin/env ruby

require 'gtk2'
require 'rsvg2'

def draw(context, width, height)
  context.move_to(0, 0)
  context.line_to(width, height)
  context.stroke

  context.move_to(width, 0)
  context.line_to(0, height)
  context.stroke
end

window = Gtk::Window.new
window.set_default_size(300, 300)
vbox = Gtk::VBox.new
area = Gtk::DrawingArea.new
save = Gtk::Button.new("save")

window.signal_connect("destroy") do
  Gtk.main_quit
end

area.signal_connect("expose_event") do |widget, event|
  width, height = area.window.size
  context = widget.window.create_cairo_context
  draw(context, width, height)
  true
end

save.signal_connect("clicked") do |widget, event|
  width, height = area.window.size
  surface = Cairo::SVGSurface.new("output.svg", width, height)
  context = Cairo::Context.new(surface)
  draw(context, width, height)
  context.show_page
  surface.finish
  true
end

vbox.pack_start(area, true, true)
vbox.pack_end(save, false, false)
window.add(vbox)
window.show_all

Gtk.main

Thanks,
--
kou

6

[snip]

http://www.arachnoid.com/ruby/graphinity/index.html
http://vww.arachnoid.com/ruby/gravity/index.html

···

On 12/13/06, Paul Lutus <nospam@nosite.zzz> wrote:

Steven Quinones-Colon wrote:

> I've been looking for a couple of days now and I can't find a library
> for svg graphics with a canvas object so I can make a financial
> charting application(stand alone, not web based), is there such a
> thing? maybe I'm missing something obvious.

Most of the available GUI libraries support graphics. I have been using the
Qt library for this sort of thing, and the graphics are quite acceptable:

--
Simon Strandgaard

7

Thanks, I'll try these.
Steven

···

If you want to output your chart to screen and SVG file, the
following small script will help you:

====

8

Simon Strandgaard wrote:

···

On 12/13/06, Paul Lutus <nospam@nosite.zzz> wrote:

Steven Quinones-Colon wrote:

> I've been looking for a couple of days now and I can't find a library
> for svg graphics with a canvas object so I can make a financial
> charting application(stand alone, not web based), is there such a
> thing? maybe I'm missing something obvious.

Most of the available GUI libraries support graphics. I have been using
the Qt library for this sort of thing, and the graphics are quite
acceptable:

[snip]

http://www.arachnoid.com/ruby/graphinity/index.html
http://vww.arachnoid.com/ruby/gravity/index.html

Thank you -- I managed to overlook the URL content as I collected the data
locally.

--
Paul Lutus
http://www.arachnoid.com