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# -*- coding: utf-8 -*-
#
# Carbou - On-screen Keyboard and UI navigation application
#
# Copyright (C) 2009 Adaptive Technology Resource Centre
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation; either version 2.1 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 Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import gtk
import gobject
import gtk.gdk as gdk
import pango
import virtkey
import qwerty
class CaribouPredicitionArea(gtk.HBox):
pass
# TODO validate keyboard by creating this object and catching exception
class CaribouKeyboard(gtk.Frame):
def __init__(self, keyboard):
gtk.Frame.__init__(self)
self.set_shadow_type(gtk.SHADOW_NONE)
# FIXME use references instead of this??
self._layouts = []
self._vk = virtkey.virtkey()
switch_buttons = []
for layout in keyboard.layouts:
layoutvbox = gtk.VBox(homogeneous=True)
layoutvbox.set_name(layout)
layout = getattr(keyboard, layout)
for row in layout:
rowhbox = gtk.HBox(homogeneous=True)
for key in row:
# check if the key is a simple str or a key defined by a tuple
if isinstance(key, str):
button = gtk.Button(key)
char = ord(key.decode('utf-8'))
button.connect("clicked", self.__send_unicode, char)
elif isinstance(key, tuple):
button = gtk.Button(key[0])
# check if this key is a layout switch key or not
if isinstance(key[1], str):
# switch layout key
# set layer name on button and save to process later
button.set_name(key[1])
switch_buttons.append(button)
else:
# regular key
button.connect("clicked", self.__send_keysym, key[1])
else:
pass #TODO throw error here
rowhbox.pack_start(button, expand=False, fill=True)
layoutvbox.pack_start(rowhbox, expand=False, fill=False)
self._layouts.append(layoutvbox)
for button in switch_buttons:
for layout in self._layouts:
if button.get_name() == layout.get_name():
button.connect("clicked", self.__change_layout, layout)
button.set_name("")
break
else:
print "ERROR" # TODO throw exception
# add the first layer and make it visible
self.add(self._layouts[0])
self.show_all()
def __send_unicode(self, widget, data):
self._vk.press_unicode(data)
self._vk.release_unicode(data)
def __send_keysym(self, widget, data):
self._vk.press_keysym(data)
self._vk.release_keysym(data)
def __change_layout(self, widget, data):
self.remove(self.get_child())
self.add(data)
self.show_all()
gobject.type_register(CaribouKeyboard)
class CaribouWindow(gtk.Window):
__gtype_name__ = "CaribouWindow"
def __init__(self):
super(CaribouWindow, self).__init__(gtk.WINDOW_POPUP)
self.set_name("CaribouWindow")
self._vbox = gtk.VBox()
self.add(self._vbox)
self._vbox.pack_start(CaribouKeyboard(qwerty))
class CaribouHoverWindow(CaribouWindow):
__gtype_name__ = "CaribouHoverWindow"
def __init__(self, default_placement=None):
super(CaribouHoverWindow, self).__init__()
self.connect("size-allocate", lambda w, a: self._update_position())
self._cursor_location = gtk.gdk.Rectangle()
self._entry_location = gtk.gdk.Rectangle()
self._default_placement = default_placement or \
CaribouKeyboardPlacement()
def set_cursor_location(self, cursor_location):
self._cursor_location = cursor_location
self._update_position()
def set_entry_location(self, entry_location):
self._entry_location = entry_location
self._update_position()
def set_default_placement(self, default_placement):
self._default_placement = default_placement
self._update_position()
def _get_root_bbox(self):
root_window = gdk.get_default_root_window()
args = root_window.get_position() + root_window.get_size()
return gdk.Rectangle(*args)
def _update_position(self, placement=None):
placement = placement or self._default_placement
x = self._calculate_axis(placement.x)
y = self._calculate_axis(placement.y)
self.move(x, y)
def _calculate_axis(self, axis_placement):
root_bbox = self._get_root_bbox()
bbox = root_bbox
if axis_placement.stickto == CaribouKeyboardPlacement.CURSOR:
bbox = self._cursor_location
elif axis_placement.stickto == CaribouKeyboardPlacement.ENTRY:
bbox = self._entry_location
offset = axis_placement.get_offset(bbox)
if axis_placement.align == CaribouKeyboardPlacement.END:
offset += axis_placement.get_length(bbox)
elif axis_placement.halign == CaribouKeyboardPlacement.CENTER:
offset += axis_placement.get_length(bbox)/2
return offset
class CaribouKeyboardPlacement(object):
START = 'start'
END = 'end'
CENTER = 'center'
SCREEN = 'screen'
ENTRY = 'entry'
CURSOR = 'cursor'
INSIDE = 'inside'
OUTSIDE = 'outside'
class _AxisPlacement(object):
def __init__(self, axis, align=None, stickto=None, gravitate=None):
self.axis = axis
self.align = align or CaribouKeyboardPlacement.END
self.stickto = stickto or CaribouKeyboardPlacement.CURSOR
self.gravitate = gravitate or CaribouKeyboardPlacement.OUTSIDE
def copy(self, align=None, stickto=None, gravitate=None):
return self.__class__(self.axis,
align or self.align,
stickto or self.stickto,
gravitate or self.gravitate)
def get_offset(self, bbox):
return bbox.x if self.axis == 'x' else bbox.y
def get_length(self, bbox):
return bbox.width if self.axis == 'x' else bbox.height
def __init__(self, x=None, y=None):
self.x = x or self._AxisPlacement('x')
self.y = y or self._AxisPlacement('y')
if __name__ == "__main__":
ckbd = CaribouHoverWindow()
ckbd.show_all()
gtk.main()
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