Ticket #4021: 0001-Cursor-tracker-only-display-the-cursor-in-mouse-trac.2.patch

bin/sugar-session

@@ -122 +122 @@
     from jarabe import frame
     gesturehandler.setup(frame.get_view())
 
+def setup_cursortracker_cb():
+    logging.debug('STARTUP: setup_cursortracker_cb')
+    from jarabe.view import cursortracker
+    cursortracker.setup()
+
 def setup_journal_cb():
     logging.debug('STARTUP: setup_journal_cb')
     from jarabe.journal import journalactivity
@@ -222 +227 @@
     GObject.idle_add(setup_frame_cb)
     GObject.idle_add(setup_keyhandler_cb)
     GObject.idle_add(setup_gesturehandler_cb)
+    GObject.idle_add(setup_cursortracker_cb)
     GObject.idle_add(setup_journal_cb)
     GObject.idle_add(setup_notification_service_cb)
     GObject.idle_add(setup_file_transfer_cb)

src/jarabe/view/Makefile.am

@@ -3 +3 @@
         __init__.py                     \
         buddyicon.py                    \
         buddymenu.py                    \
+        cursortracker.py                \
         customizebundle.py              \
         gesturehandler.py               \
         keyhandler.py                   \

new file src/jarabe/view/cursortracker.py

@@ +1 @@
+# Copyright (C) 2012 One Laptop Per Child
+#
+# 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
+
+import logging
+
+from gi.repository import Gdk
+
+from gi.repository import SugarExt
+
+_instance = None
+
+
+def setup():
+    '''Cursor tracker: only display the cursor in mouse/trackpad mode
+
+    We only display the cursor in mouse/trackpad mode, hence when
+    a mouse motion is detected or a button press event. When a
+    touch begin event is received the cursor will be hidden.
+
+    We only track the incoming events when a touchscreen device
+    is available.
+
+    '''
+    global _instance
+
+    if _instance:
+        del _instance
+
+    display = Gdk.Display.get_default()
+    device_manager = display.get_device_manager()
+    devices = device_manager.list_devices(Gdk.DeviceType.SLAVE)
+    for device in devices:
+        if device.get_source() == Gdk.InputSource.TOUCHSCREEN:
+            logging.debug('Cursor Tracker: found touchscreen, ' \
+                              'will track input.')
+            _instance = SugarExt.CursorTracker()
+            break
+
+    if not _instance:
+        logging.debug('Cursor Tracker: no touchscreen available, ' \
+                          'will not track input.')