From: Rich <rich@...>
Date: 2004-06-19T13:23:07+09:00
Subject: Re: Generating "real-time" 2D line plots in Windows 2k?

----- Original Message ----- 
From: "Todd Gardner" <piir@earthlink.net>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Friday, June 18, 2004 7:23 PM
Subject: Re: Generating "real-time" 2D line plots in Windows 2k?

> I first must apologize.  I am using the voice dictation software

Don't worry.

> Dragon NaturallySpeaking are Windows 2000 and it sometimes gets things
> correct however, sometimes when it messes up messes up big-time and I
> just don't notice all of the completely erroneous words.
>

lol - I mess up and I'm typing!!

> I am unable to access http://lithinos.com/ so the subsequent link does
> not work.
>

Yeah - it's not the greatest hosting company... lots of downtime.

> I had downloaded fox-1.2.4 but I am unsure how to use it with Windows.
>  Would you mind getting this newbie pointers so that I can get this
> installed properly?
>

I wouldn't do it that way. I'd get the one-click installer - it has
everything you'll need for FOX and FXRuby.

The one-click installer is at:

http://rubyforge.org/frs/?group_id=167

Download that, and run it to get everything setup.

After you have that going, just save the following code into a file (".rb")
and double-click it.

START CODE
 require 'fox'
include Fox

@appRef=FXApp.new
@mainwin=FXMainWindow.new(@appRef,"Moving
Graph",nil,nil,LAYOUT_FIX_HEIGHT|LAYOUT_FIX_WIDTH|DECOR_ALL)
@mainwin.x=@mainwin.y=200
@mainwin.width=300
@mainwin.height=300
def paint(n,l,d)
   if(@first.nil?)
      @repaint_n=n
      @repaint_l=l
      @repaint_d=d
   end
   FXDCWindow.new(@canvas, d) do |dc|
      dc.foreground = @canvas.backColor
      dc.fillRectangle(d.rect.x, d.rect.y, d.rect.w, d.rect.h)
   end
end
def clear_canvas
   FXDCWindow.new(@canvas) do |dc|
     dc.foreground = @canvas.backColor
     dc.fillRectangle(0, 0, @canvas.width, @canvas.height)
   end
end
def draw_graph
   clear_canvas
   FXDCWindow.new(@canvas) do |dc|
      dc.foreground=FXRGB(115,0,0)
      x=0
      @points.each{|i|
         h=@canvas.height
         dc.drawLine(x,h,x,h-i)
         x+=1
      }
   end
end
def create_next_value(n,l,d)
   if(!@firstTime.nil?)
      1.times do
         @show_next_value.text=@points.last.to_s
         sleep(1)
         @points.shift
         l=@points.last
         if(rand(10)>=5)
            new_value=l+rand(10)
            new_value=200 if new_value>200
            new_value=25 if new_value<0
            @points << new_value
         else
            new_value=l-rand(10)
            new_value=200 if new_value>200
            new_value=25 if new_value<0
            @points << new_value
         end
      end
   else
      @firstTime=true
      (@canvas.width-2).times do |i|
         l=@points.last
         if(rand(10)>=5)
            new_value=l+rand(10)
            new_value=200 if new_value>200
            new_value=25 if new_value<0
            @points << new_value
         else
            new_value=l-rand(10)
            new_value=200 if new_value>200
            new_value=25 if new_value<0
            @points << new_value
         end
      end
   end
   draw_graph
   @appRef.addTimeout(1, method(:create_next_value))
end
@show_next_value=FXTextField.new(@mainwin,20,nil,0,LAYOUT_FILL_X|TEXTFIELD_N
ORMAL)
@canvas=FXCanvas.new(@mainwin,nil,0,FRAME_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_Y
)
@canvas.connect(SEL_PAINT,method(:paint))
@points=[100]

@appRef.addTimeout(1, method(:create_next_value))

@appRef.create
@mainwin.show(PLACEMENT_SCREEN)
@appRef.run
END CODE

That's just an example that I whipped up for you. You'll probably want to do
a bit more with your GUI.

> Also, I would really appreciate it if you show me how to build that
> example to an executable.
>

After we get the above stuff working, I'd be happy to walk you through it -
it's super easy.

Remember though - you're not really 'building' it into an executable...
you're packaging the Ruby source file with the Ruby interpreter and FOX
library, and distributing everything in a single file with an EXE extension
that can be double-clicked to run.

It will look and function the same as a 'compiled' or 'built' EXE, but it
isn't really...

> Any ideas would be greatly appreciated,
>
> Thank you,
>
> Todd
>

Not a problem!

-Richard