Wxruby and threads

Hello.
I trying to write a small GUI application.
I choose wxruby library.(any gui library with unicode is good for me)
My application use threads.
Next example is not work as expecting.

require ‘thread’
require ‘wx’
include Wx

class MinimalApp < App
def on_init
f=Frame.new(nil, -1,‘Test’)
f.show
end
end

Thread.new do
loop {
puts ‘hello’
STDOUT.flush
sleep(1)
}
end

MinimalApp.new.main_loop

After starting, ‘hello’ messages is show repeatly only when I drag the
window and
stops when I move the focus out.
What I missed ?

Regards,
Yuri Kozlov

Hello

Yuri Kozlov wrote:

Thread.new do
loop {
puts ‘hello’
STDOUT.flush
sleep(1)
}
end

MinimalApp.new.main_loop

I don’t know exactly how ruby’s threads interact with wx’s scheduling.
Perhaps you could try adding an evt_idle handler to your example?

For me this does what I’d expect: fire regularly and spawn and run
threads fine. What I didn’t expect, but that happened anyway, is that
your original long-running Thread now also seems to run regularly
regardless of app focus. Maybe add an explicit call to thread.run() in
the on_idle handler?

alex

require ‘thread’
require ‘wx’

class MinimalApp < Wx::App
def on_idle
Thread.new do
puts ‘FOO’
STDOUT.flush
sleep(1)
end
end

def on_init
evt_idle { on_idle }
f = Wx::Frame.new( nil, -1,‘Test’ )
f.show
end
end

$t = Thread.new do
loop {
puts ‘BAR’
STDOUT.flush
sleep(1)
}
end

MinimalApp.new.main_loop

Yuri Kozlov wrote:

What I missed ?

Ruby threads aren’t system threads. When you’re in the Wx main loop,
ruby isn’t getting called, so your thread doesn’t execute.


Neil S. - [email protected]

‘A republic, if you can keep it.’ – Benjamin Franklin

It seems, what this code make new thread every time when on_idle
called.

class MinimalApp < Wx::App
def on_idle
Thread.new do
puts ‘FOO’
STDOUT.flush
sleep(1)
end
end

Anyway, its not worked for me.
Thank you, Alex.

Regards,
Yuri Kozlov

Ruby threads aren’t system threads. When you’re in the Wx main loop,
ruby isn’t getting called, so your thread doesn’t execute.

Ok. I suspected like this.

Is exists gui library worked with ruby threads?
Or I must fork the new process, doing interprocess communication ?

Regards,
Yuri Kozlov

Aha.
Tkruby is much better.
October 13, subject “threading in win32” by Ara.T.Howard

require “tk”

thread_runner = lambda do
Thread::new do
loop {
puts ‘hello’
STDOUT.flush
sleep(1)
}
end
en

TkButton::new(nil,
“text” => “start thread/process”,
“command” => thread_runner).pack( “fill” =>“x”)

TkButton::new(nil,
“text” => ‘quit’,
“command” => lambda{exit}).pack(“fill” => “x”)

Tk::mainloop

The problem is solved.

Regards,
Yuri Kozlov

Could you post the full text working example ?

Thank you.

Regards,
Yuri Kozlov

Yuri Kozlov wrote:

It seems, what this code make new thread every time when on_idle
called.

Yes. It was just an example. If you want to run a previously defined
thread, the following works for me (CVS HEAD, Wx 2.6.2 unicode, OS X
10.3, Ruby 1.8.2)

def on_idle
@thread.run()
end

a

See below - note it doesn’t really matter where you create the thread -
it could be passed into the App’s constructor. It’s just in on_init for
simplicity.

a

require ‘thread’
require ‘wx’

class MinimalApp < Wx::App
def on_idle
@thread.run()
end

def on_init
@thread = Thread.new do
loop {
puts ‘HELLO’
STDOUT.flush
sleep 1
}
end
evt_idle { on_idle }
f = Wx::Frame.new( nil, -1,‘Test’ )
f.show
end
end

MinimalApp.new().main_loop

Not worked.
linux-i686 ruby 1.8.2 wx2.6.2 wxruby2 cvs
windows ruby 1.8.2 wx2.4 wxruby old.

I will use Tk library.

Thank you, Alex.

Regards,
Yuri Kozlov

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