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-rw-r--r--addons/gtkwidgeteventfilter.py69
1 files changed, 69 insertions, 0 deletions
diff --git a/addons/gtkwidgeteventfilter.py b/addons/gtkwidgeteventfilter.py
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+++ b/addons/gtkwidgeteventfilter.py
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+# Copyright (C) 2009, Tutorius.org
+#
+# This program 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.
+#
+# This program 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+from sugar.tutorius.filters import *
+from sugar.tutorius.properties import *
+
+class GtkWidgetEventFilter(EventFilter):
+ """
+ Basic Event filter for Gtk widget events
+ """
+ object_id = TUAMProperty()
+ event_name = TStringProperty("clicked")
+
+ def __init__(self, next_state=None, object_id=None, event_name=None):
+ """Constructor
+ @param next_state default EventFilter param, passed on to EventFilter
+ @param object_id object fqdn-style identifier
+ @param event_name event to attach to
+ """
+ super(GtkWidgetEventFilter,self).__init__(next_state)
+ self._callback = None
+ self.object_id = object_id
+ self.event_name = event_name
+ self._widget = None
+ self._handler_id = None
+
+ def install_handlers(self, callback, **kwargs):
+ """install handlers
+ @param callback default EventFilter callback arg
+ @param activity keyword argument activity must be present to install
+ the event handler into the activity's widget hierarchy
+ """
+ super(GtkWidgetEventFilter, self).install_handlers(callback, **kwargs)
+ if not "activity" in kwargs:
+ raise TypeError("activity argument is Mandatory")
+
+ #find the widget and connect to its event
+ self._widget = find_widget(kwargs["activity"], self.object_id)
+ self._handler_id = self._widget.connect( \
+ self.event_name, self.do_callback )
+
+ def remove_handlers(self):
+ """remove handlers"""
+ super(GtkWidgetEventFilter, self).remove_handlers()
+ #if an event was connected, disconnect it
+ if self._handler_id:
+ self._widget.handler_disconnect(self._handler_id)
+ self._handler_id=None
+
+__event__ = {
+ "name" : "GtkWidgetEventFilter",
+ "display_name" : "GTK Event catcher",
+ "icon" : "player_play",
+ "class" : GtkWidgetEventFilter,
+ "mandatory_props" : ["object_id"]
+}
+