From 474d482f53ca7fc89183993d9a0992b71cfcfc02 Mon Sep 17 00:00:00 2001
From: Vincent Vinet <vince.vinet@gmail.com>
Date: Wed, 25 Mar 2009 18:36:17 +0000
Subject: Add the WidgetTypeFilter and use it in TAbiword

---
diff --git a/src/sugar/tutorius/filters.py b/src/sugar/tutorius/filters.py
index a69055a..594ad6a 100644
--- a/src/sugar/tutorius/filters.py
+++ b/src/sugar/tutorius/filters.py
@@ -16,9 +16,14 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 import gobject
-
+import gtk
+import logging
+logger = logging.getLogger("filters")
 
 from sugar.tutorius.gtkutils import find_widget
+from sugar.tutorius.services import ObjectStore
+
+
 class EventFilter(object):
     """
     Base class for an event filter
@@ -168,4 +173,68 @@ class GtkWidgetEventFilter(EventFilter):
             self._widget.handler_disconnect(self._handler_id)
             self._handler_id=None
 
-        
+class GtkWidgetTypeFilter(EventFilter):
+    """
+    Event Filter that listens for keystrokes on a widget
+    """
+    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()
+
--
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