new threading model in gui_helper

1 files changed, 108 insertions, 0 deletions

diff --git a/portato/gui/gtk/exception_handling.py b/portato/gui/gtk/exception_handling.py
new file mode 100644
index 0000000..e9d19d1
--- /dev/null
+++ b/portato/gui/gtk/exception_handling.py
@@ -0,0 +1,108 @@
+# -*- coding: utf-8 -*-
+#
+# File: portato/gui/gtk/exception_handling.py
+# This file is part of the Portato-Project, a graphical portage-frontend.
+#
+# Copyright (C) 2007 René 'Necoro' Neumann
+# This is free software.  You may redistribute copies of it under the terms of
+# the GNU General Public License version 2.
+# There is NO WARRANTY, to the extent permitted by law.
+#
+#
+# Written by René 'Necoro' Neumann
+
+import gtk, pango, gobject
+import sys, traceback
+
+from threading import Thread
+from gettext import lgettext as _
+from StringIO import StringIO
+
+from portato.helper import error
+
+class GtkThread (Thread):
+	def run(self):
+		try:
+			Thread.run(self)
+		except SystemExit:
+			raise # let normal thread handle it
+		except:
+			type, val, tb = sys.exc_info()
+			try:
+				try:
+					sys.excepthook(type, val, tb, thread = self.getName())
+				except TypeError:
+					raise type, val, tb # let normal thread handle it
+			finally:
+				del type, val, tb
+
+class UncaughtExceptionDialog(gtk.MessageDialog):
+	"""Original idea by Gustavo Carneiro - original code: http://www.daa.com.au/pipermail/pygtk/attachments/20030828/2d304204/gtkexcepthook.py."""
+
+	def __init__(self, type, value, tb, thread = None):
+
+		super(UncaughtExceptionDialog,self).__init__(parent=None, flags=0,  type=gtk.MESSAGE_WARNING, buttons=gtk.BUTTONS_NONE, message_format=_("A programming error has been detected during the execution of this program."))
+		self.set_title(_("Bug Detected"))
+		self.format_secondary_text(_("It probably isn't fatal, but should be reported to the developers nonetheless."))
+
+		self.add_button(_("Show Details"), 1)
+		self.add_button(gtk.STOCK_CLOSE, gtk.RESPONSE_CLOSE)
+
+		# Details
+		self.textview = gtk.TextView()
+		self.textview.set_editable(False)
+		self.textview.modify_font(pango.FontDescription("Monospace"))
+	
+		self.sw = gtk.ScrolledWindow();
+		self.sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+		self.sw.add(self.textview)
+	
+		self.tbFrame = gtk.Frame()
+		self.tbFrame.set_shadow_type(gtk.SHADOW_IN)
+		self.tbFrame.add(self.sw)
+		self.tbFrame.set_border_width(6)
+		
+		self.vbox.add(self.tbFrame)
+		
+		textbuffer = self.textview.get_buffer()
+		text = get_trace(type, value, tb)
+		if thread:
+			text = _("Exception in thread \"%(thread)s\":\n%(trace)s") % {"thread": thread, "trace": text}
+		textbuffer.set_text(text)
+		self.textview.set_size_request(gtk.gdk.screen_width()/2, gtk.gdk.screen_height()/3)
+
+		self.details = self.tbFrame
+		self.set_position(gtk.WIN_POS_CENTER)
+		self.set_gravity(gtk.gdk.GRAVITY_CENTER)
+
+	def run (self):
+		while True:
+			resp = super(UncaughtExceptionDialog, self).run()
+			if resp == 1:
+				self.details.show_all()
+				self.set_response_sensitive(1, False)
+			else:
+				break
+		self.destroy()
+
+def get_trace(type, value, tb):
+	trace = StringIO()
+	traceback.print_exception(type, value, tb, None, trace)
+	traceStr = trace.getvalue()
+	trace.close()
+	return traceStr
+	
+def register_ex_handler():
+	
+	def handler(type, val, tb, thread = None):
+		def run_dialog():
+			UncaughtExceptionDialog(type, val, tb, thread).run()
+		
+		if thread:
+			error(_("Exception in thread \"%(thread)s\":\n%(trace)s"), {"thread": thread, "trace": get_trace(type, val, tb)})
+		else:
+			error(_("Exception:\n%s"), get_trace(type, val, tb))
+		
+		gobject.idle_add(run_dialog)
+
+	sys.excepthook = handler