From 2fee267dfee11bd687b4d780cb6b82924d59af3c Mon Sep 17 00:00:00 2001
From: Sebastian Koslowski <koslowski@kit.edu>
Date: Thu, 23 Jul 2015 16:36:22 +0200
Subject: grc: open and update params from external editor
---
grc/gui/external_editor.py | 93 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)
create mode 100644 grc/gui/external_editor.py
(limited to 'grc/gui/external_editor.py')
diff --git a/grc/gui/external_editor.py b/grc/gui/external_editor.py
new file mode 100644
index 0000000000..3322556ce7
--- /dev/null
+++ b/grc/gui/external_editor.py
@@ -0,0 +1,93 @@
+"""
+Copyright 2015 Free Software Foundation, Inc.
+This file is part of GNU Radio
+
+GNU Radio Companion is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+GNU Radio Companion is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+"""
+
+import os
+import sys
+import time
+import threading
+import tempfile
+import subprocess
+
+import Constants
+
+
+class ExternalEditor(threading.Thread):
+
+ def __init__(self, name, value, callback):
+ threading.Thread.__init__(self)
+ self.daemon = True
+ self._stop_event = threading.Event()
+
+ self.callback = callback
+ self.tempfile = self._create_tempfile(name, value)
+
+ def _create_tempfile(self, name, value):
+ fp = tempfile.NamedTemporaryFile(mode='w', suffix='.py',
+ prefix=name + '_')
+ fp.write(value)
+ fp.flush()
+ return fp
+
+ @property
+ def filename(self):
+ return self.tempfile.name
+
+ def open_editor(self):
+ proc = subprocess.Popen(
+ args=(Constants.EDITOR, self.filename)
+ )
+ proc.poll()
+ return proc
+
+ def stop(self):
+ self._stop_event.set()
+
+ def run(self):
+ filename = self.filename
+ # print "file monitor: started for", filename
+ last_change = os.path.getmtime(filename)
+ try:
+ while not self._stop_event.is_set():
+ mtime = os.path.getmtime(filename)
+ if mtime > last_change:
+ # print "file monitor: reload trigger for", filename
+ last_change = mtime
+ with open(filename) as fp:
+ data = fp.read()
+ self.callback(data)
+ time.sleep(1)
+
+ except Exception as e:
+ print >> sys.stderr, "file monitor crashed:", str(e)
+ else:
+ # print "file monitor: done with", filename
+ pass
+
+
+if __name__ == '__main__':
+ def p(data):
+ print data
+
+ Constants.EDITOR = '/usr/bin/gedit'
+ editor = ExternalEditor("test", "content", p)
+ editor.open_editor()
+ editor.start()
+ time.sleep(15)
+ editor.stop()
+ editor.join()
--
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