wxruby users - Nov 2009 - GUI Responsiveness

I''m having a heck of a time trying to keep my app appearing responsive
while shelling out to long running commands / downloading large files.
I''ve read everything I can find on the subject, which got me what I
have
now, but nothing I try seems to work.  How do I keep the interface
refreshed so that it''s not just a plain white box after other windows
are opened over it, etc?  Below is a rough idea of what I have.  What am
I missing?

def on_init
  t = Wx::Timer.new(self, 55)
  evt_timer(55) { Thread.pass }
  t.start(25)

  @frame = MyFrame.new
  @frame.show
end

class MyFrame
  ...
  def on_download(event)
    ...
    Thread.new { download(file) }
    ...
  end

  # on an event, download the file
  def download(file_obj)
    Wx::WindowDisabler.disable(self) do
      info = Wx::BusyInfo.busy(''Please wait...'', self) do
        Wx::log_message("Getting file #{file_obj.name}")
        file_obj.fetch # uses open-uri to get a large binary
      end
    end
    ...
  end
end
-- 
Posted via http://www.ruby-forum.com/.

Hello El,

On Thu, Nov 5, 2009 at 1:09 PM, El Gato <lists at ruby-forum.com> wrote:
> I''m having a heck of a time trying to keep my app appearing
responsive
> while shelling out to long running commands / downloading large files.
> I''ve read everything I can find on the subject, which got me what
I have
> now, but nothing I try seems to work.  How do I keep the interface
> refreshed so that it''s not just a plain white box after other
windows
> are opened over it, etc?  Below is a rough idea of what I have.  What am
> I missing?
>
> def on_init
>  t = Wx::Timer.new(self, 55)
>  evt_timer(55) { Thread.pass }
>  t.start(25)
>
>  @frame = MyFrame.new
>  @frame.show
> end
>
> class MyFrame
>  ...
>  def on_download(event)
>    ...
>    Thread.new { download(file) }
>    ...
>  end
>
>  # on an event, download the file
>  def download(file_obj)
>    Wx::WindowDisabler.disable(self) do
>      info = Wx::BusyInfo.busy(''Please wait...'', self) do
>        Wx::log_message("Getting file #{file_obj.name}")
>        file_obj.fetch # uses open-uri to get a large binary
>      end
>    end
>    ...
>  end
> end
>
There needs to be a Thread.pass in whatever your fetch method on file_obj
runs, if your downloading a file, then you need to use Async Sockets, and
utilize IO.select() to detect activity on a socket, if no activity, do a
Thread.pass, if there is activity, read it, then do a Thread.pass.

It has to work between the Main thread, which handles the Ruby events, and
the wxWidgets thread, which handles the GUI events internally.

hth,

Mario

> --
> Posted via http://www.ruby-forum.com/.
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-- 
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
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