From b658de9cf3cb526f8492a54dab19e8238c9edb9b Mon Sep 17 00:00:00 2001
From: mike <michael.jmontcalm@gmail.com>
Date: Mon, 05 Oct 2009 15:42:07 +0000
Subject: LP 439980 : Adding missed actions in previous checkins

---
(limited to 'addons/gtkwidgettypefilter.py')

diff --git a/addons/gtkwidgettypefilter.py b/addons/gtkwidgettypefilter.py
new file mode 100644
index 0000000..16673c1
--- /dev/null
+++ b/addons/gtkwidgettypefilter.py
@@ -0,0 +1,100 @@
+# 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 *
+from sugar.tutorius.services import ObjectStore
+from sugar.tutorius.gtkutils import find_widget
+
+import logging
+logger = logging.getLogger("GtkWidgetTypeFilter")
+
+class GtkWidgetTypeFilter(EventFilter):
+    """
+    Event Filter that listens for keystrokes on a widget
+    """
+    object_id = TStringProperty("")
+    text = TStringProperty("")
+    strokes = TArrayProperty([])
+
+    def __init__(self, next_state, object_id, text=None, strokes=None):
+        """Constructor
+        @param next_state default EventFilter param, passed on to EventFilter
+        @param object_id object tree-ish identifier
+        @param text resulting text expected
+        @param strokes list of strokes expected
+
+        At least one of text or strokes must be supplied
+        """
+        super(GtkWidgetTypeFilter, self).__init__(next_state)
+        self.object_id = object_id
+        self.text = text
+        self._captext = ""
+        self.strokes = strokes
+        self._capstrokes = []
+        self._widget = None
+        self._handler_id = None
+
+    def install_handlers(self, callback, **kwargs):
+        """install handlers
+        @param callback default EventFilter callback arg
+        """
+        super(GtkWidgetTypeFilter, self).install_handlers(callback, **kwargs)
+        logger.debug("~~~GtkWidgetTypeFilter install")
+        activity = ObjectStore().activity
+        if activity is None:
+            logger.error("No activity")
+            raise RuntimeWarning("no activity in the objectstore")
+
+        self._widget = find_widget(activity, self.object_id)
+        if self._widget:
+            self._handler_id= self._widget.connect("key-press-event",self.__keypress_cb)
+            logger.debug("~~~Connected handler %d on %s" % (self._handler_id,self.object_id) )
+
+    def remove_handlers(self):
+        """remove handlers"""
+        super(GtkWidgetTypeFilter, 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
+
+    def __keypress_cb(self, widget, event, *args):
+        """keypress callback"""
+        logger.debug("~~~keypressed!")
+        key = event.keyval
+        keystr = event.string
+        logger.debug("~~~Got key: " + str(key) + ":"+ keystr)
+        self._capstrokes += [key]
+        #TODO Treat other stuff, such as arrows
+        if key == gtk.keysyms.BackSpace:
+            self._captext = self._captext[:-1]
+        else:
+            self._captext = self._captext + keystr
+
+        logger.debug("~~~Current state: " + str(self._capstrokes) + ":" + str(self._captext))
+        if not self.strokes is None and self.strokes in self._capstrokes:
+            self.do_callback()
+        if not self.text is None and self.text in self._captext:
+            self.do_callback()
+
+__event__ = {
+    'name' : 'GtkWidgetTypeFilter',
+    'display_name' : 'Widget Filter',
+    'icon' : '',
+    'class' : GtkWidgetTypeFilter,
+    'mandatory_props' : ['next_state', 'object_id']
+}
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