Re: Call external programs and keep showing its outputs

[Woody Wu <narkewoody gmail com>]

On Thu, Oct 10, 2013 at 09:30:23AM +0200, onetmt wrote:
> Il 10/10/2013 06:55, Woody Wu ha scritto:
> > Hi,
> >
> > I am about to write a test runner with GTK+. It basically can list a lot
> > of external test programs (non-GTK+ pure Linux apps) in a treeview and
> > let user select one of them to run. While an external program is
> > running, I want to get all its outputs (to stdout/stderr) and keep
> > updating in a textview.
> >
> > Since I am a Linux programmer, so I know how to fork a new process and
> > pipe into an external program. But I don't know in GTK+, what's the
> > right method to keep fetching the information from the pipe and showing
> > them in my GUI widgets.  On the other hand, while an external program is
> > running, I don't want user feel that the my program is frozing and user
> > should be able to kill the running external program by clicking a 'stop'
> > button on the GUI.
> >
> > For this kind of task, what GTK+ technology I should go to grab?  Thanks
> > in advance!
>
> Hope you like pyhton :)

I know python. But I have to use a GUI as runner for this time.

> -- 
> Hofstadter's Law:
> "It always takes longer than you expect, even when you take into account
> Hofstadter's Law."


> # -*- coding: UTF-8 -*-
>
> import gobject
> import gtk
> import subprocess
>
> class load_ng:
>     def __init__(self):
>         ###
>         # Initialize the data
>         ###
>         self.error = 0
>       self.base = '0xB0'
>         self.com = ["ls","-l"]
>         self.log = open('test_pygtk.log', 'w')
>         ###
>         # Initialize the gui
>         ###
>         self.builder = gtk.Builder()
>         self.builder.add_from_file("test_pygtk.ui")
>         self.window = self.builder.get_object("window_main")
>         # 
>         text = self.builder.get_object("txt_console")
>         self.txt_buf = text.get_buffer()
>         self.ok_tag = self.txt_buf.create_tag("ok", foreground="lightgreen", weight=700)
>         self.ko_tag = self.txt_buf.create_tag("ko", foreground="red", weight=700)
>         self.err_tag = self.txt_buf.create_tag("err", foreground="red")
>         
>         # connect signals
>         self.builder.connect_signals(self)
>
>     def on_btn_check_clicked(self, widget):
>         # resetto il flag di errore
>         self.error = 0
>
>         self.test_launch()        
>         itr = self.txt_buf.get_end_iter()
>         if self.error != 0:
>             self.txt_buf.insert_with_tags(itr, "Unexpected error; please see \nlog file for futher 
> details.\n", self.err_tag)
>         else:
>             self.txt_buf.insert(itr, "###\n")            
>
>     def on_btn_quit_clicked(self, widget):
>         self.log.close()
>         gtk.main_quit()
>
>     def on_window_main_destroy(self, widget, data=None):
>         self.log.close()
>         gtk.main_quit()
>
>     def test_launch(self):
>         # if you want, you can change command options here:
>         self.com[1] = "-la"
>
>         itr = self.txt_buf.get_end_iter()
>         self.txt_buf.insert(itr, "Launching command...\t\t\t\t\t\t")
>         while gtk.events_pending():
>             gtk.main_iteration_do(False)
>
>         risposta = subprocess.Popen(self.com, stdout=subprocess.PIPE).communicate()[0]
>         lines = risposta.split('\n')
>
>         stato = False
>         for line in lines:
>             # maybe a better test can be designed ;)
>             if '.' not in line:
>                 stato = True
>
>         if stato:
>             self.txt_buf.insert_with_tags(itr, "[OK]\n", self.ok_tag)
>             self.txt_buf.insert(itr, risposta)
>         else:
>             self.txt_buf.insert_with_tags(itr, "[Failed]\n", self.ko_tag)
>             self.error = 1
>             self.log.writelines(risposta)
>
>     def main(self):
>         self.window.show()
>         gtk.main()
>         
>         pass
>
> if __name__=='__main__':
>     app = load_ng()
>     app.window.show()
>     gtk.main()

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-- 
I can't go back to yesterday - because I was a different person then