Ticket #2006: 0001-touchpad-extension.patch

new file extensions/deviceicon/touchpad.py

@@ +1 @@
+# Copyright (C) 2010, Walter Bender, Sugar Labs
+#
+# 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 gettext import gettext as _
+
+import gtk
+import gconf
+from os import system, path, remove
+
+from sugar.graphics.tray import TrayIcon
+from sugar.graphics.xocolor import XoColor
+from sugar.graphics.palette import Palette
+from jarabe.frame.frameinvoker import FrameWidgetInvoker
+
+_STATUS_TEXT = {'capacitive': _('finger'), 'resistive': _('stylus')}
+_CAPACITIVE_ICON_NAME = 'touchpad-capacitive'
+_RESISTIVE_ICON_NAME = 'touchpad-resistive'
+_FLAG_PATH = '/home/olpc/.olpc-pentablet-mode'
+_NODE_PATH = '/sys/devices/platform/i8042/serio1/ptmode'
+
+
+class DeviceView(TrayIcon):
+    """ Manage the touchpad mode from the device palette on the Frame """
+
+    FRAME_POSITION_RELATIVE = 500
+
+    def __init__(self):
+        """ Create the touchpad palette and display it on Frame """
+
+        # Only appears when the device exisits
+        if not path.exists(_NODE_PATH):
+            return
+
+        if get_touchpad() == 'resistive':
+            icon_name = _RESISTIVE_ICON_NAME
+        else:
+            icon_name = _CAPACITIVE_ICON_NAME
+
+        client = gconf.client_get_default()
+        color = XoColor(client.get_string('/desktop/sugar/user/color'))
+        TrayIcon.__init__(self, icon_name=icon_name, xo_color=color)
+        self.set_palette_invoker(FrameWidgetInvoker(self))
+        self.connect('button-release-event', self.__button_release_event_cb)
+        self.connect('expose-event', self.__expose_event_cb)
+
+    def create_palette(self):
+        """ On create, set the current mode """
+        self.palette = ResourcePalette(_('My touchpad'), self.icon)
+        self.palette.set_group_id('frame')
+        return self.palette
+
+    def __button_release_event_cb(self, widget, event):
+        """ On button release, switch modes """
+        self.palette.toggle_mode()
+        return True
+
+    def __expose_event_cb(self, *args):
+        pass
+
+
+class ResourcePalette(Palette):
+    """ Query the current state of the touchpad and update the display """
+
+    def __init__(self, primary_text, icon):
+        """ Get the status """
+        Palette.__init__(self, label=primary_text)
+
+        self._icon = icon
+
+        self.connect('popup', self.__popup_cb)
+        self.connect('popdown', self.__popdown_cb)
+
+        self.updating = False
+
+        vbox = gtk.VBox()
+        self.set_content(vbox)
+
+        self._status_text = gtk.Label()
+        vbox.pack_start(self._status_text, padding=10)
+        self._status_text.show()
+
+        vbox.show()
+
+        self._mode = get_touchpad()
+        self.set_mode_graphics()
+
+    def set_mode_graphics(self):
+        """ Set the label and icon based on the current mode """
+        self._status_text.set_label(_STATUS_TEXT[self._mode])
+        if self._mode == 'resistive':
+            self._icon.props.icon_name = _RESISTIVE_ICON_NAME
+        else:
+            self._icon.props.icon_name = _CAPACITIVE_ICON_NAME
+
+    def toggle_mode(self):
+        """ On mouse click, toggle the mode """
+        if self._mode == 'capacitive':
+            self._mode = 'resistive'
+        else:
+            self._mode = 'capacitive'
+
+        set_touchpad(self._mode)
+        self.set_mode_graphics()
+
+    def __popup_cb(self, gobject):
+        self.updating = True
+
+    def __popdown_cb(self, gobject):
+        self.updating = False
+
+
+def setup(tray):
+    tray.add_device(DeviceView())
+
+
+def get_touchpad():
+    """ Get the touchpad mode. """
+    _file_handle = open(_NODE_PATH, "r")
+    _text = _file_handle.read()
+    _file_handle.close()
+
+    if _text[0] == '1':
+        return 'resistive'
+    else:
+        return 'capacitive'
+
+
+def set_touchpad(touchpad):
+    """ Set the touchpad mode. """
+    if touchpad == 'capacitive':
+        if path.exists(_FLAG_PATH):
+            remove(_FLAG_PATH)
+        system("echo 0 > %s" % (_NODE_PATH))
+    else:
+        _file_handle = open(_FLAG_PATH, "w")
+        _file_handle.close()
+        system("echo 1 > %s" % (_NODE_PATH))
+    return