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# -*- coding: utf-8 -*-
#
# Carbou - text entry and UI navigation application
#
# Copyright (C) 2009 Eitan Isaacson <eitan@monotonous.org>
#
# 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 gtk.gdk as gdk
import glib
from math import sqrt
import keyboard
from keyboards import qwerty
class CaribouWindow(gtk.Window):
__gtype_name__ = "CaribouWindow"
def __init__(self, default_placement=None,
min_alpha=1.0, max_alpha=1.0, max_distance=100):
super(CaribouWindow, self).__init__(gtk.WINDOW_POPUP)
self.set_name("CaribouWindow")
self._vbox = gtk.VBox()
self.add(self._vbox)
self._vbox.pack_start(keyboard.CaribouKeyboard(qwerty))
self.connect("size-allocate", lambda w, a: self._update_position())
self._cursor_location = gdk.Rectangle()
self._entry_location = gdk.Rectangle()
self._default_placement = default_placement or \
CaribouWindowPlacement()
# Alpha and proximity stuff
self.connect('map-event', self._onmapped)
self.max_distance = max_distance
if max_alpha < min_alpha:
raise ValueError, "min_alpha can't be larger than max_alpha"
self.min_alpha = min_alpha
self.max_alpha = max_alpha
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 _calculate_position(self, placement=None):
root_bbox = self._get_root_bbox()
placement = placement or self._default_placement
x = self._calculate_axis(placement.x, root_bbox)
y = self._calculate_axis(placement.y, root_bbox)
return x, y
def _update_position(self):
x, y = self._calculate_position()
root_bbox = self._get_root_bbox()
proposed_position = \
gdk.Rectangle(x, y, self.allocation.width, self.allocation.height)
x += self._default_placement.x.adjust_to_bounds(root_bbox, proposed_position)
y += self._default_placement.y.adjust_to_bounds(root_bbox, proposed_position)
self.move(x, y)
def _calculate_axis(self, axis_placement, root_bbox):
bbox = root_bbox
if axis_placement.stickto == CaribouWindowPlacement.CURSOR:
bbox = self._cursor_location
elif axis_placement.stickto == CaribouWindowPlacement.ENTRY:
bbox = self._entry_location
offset = axis_placement.get_offset(bbox)
if axis_placement.align == CaribouWindowPlacement.END:
offset += axis_placement.get_length(bbox)
if axis_placement.gravitate == CaribouWindowPlacement.INSIDE:
offset -= axis_placement.get_length(self.allocation)
elif axis_placement.align == CaribouWindowPlacement.START:
if axis_placement.gravitate == CaribouWindowPlacement.OUTSIDE:
offset -= axis_placement.get_length(self.allocation)
elif axis_placement.align == CaribouWindowPlacement.CENTER:
offset += axis_placement.get_length(bbox)/2
return offset
def _onmapped(self, obj, event):
if self.is_composited():
self.set_opacity(self.max_alpha)
if self.max_alpha != self.min_alpha:
# Don't waste CPU if the max and min are equal.
glib.timeout_add(80, self._proximity_check)
def _proximity_check(self):
x, y = self.get_pointer()
abs_x, abs_y = self.get_position()
x += abs_x
y += abs_y
distance = self._get_distance_to_bbox(
x, y, gtk.gdk.Rectangle(abs_x, abs_y,
self.allocation.width,
self.allocation.height))
if CaribouWindowPlacement.SCREEN != \
self._default_placement.x.stickto or \
CaribouWindowPlacement.SCREEN != \
self._default_placement.y.stickto:
if self._entry_location != gtk.gdk.Rectangle(0, 0, 0, 0):
distance2 = self._get_distance_to_bbox(x, y,
self._entry_location)
distance = min(distance, distance2)
opacity = (self.max_alpha - self.min_alpha) * \
(1 - min(distance, self.max_distance)/self.max_distance)
opacity += self.min_alpha
self.set_opacity(opacity)
return self.props.visible
def _get_distance_to_bbox(self, x, y, bbox):
if x < bbox.x:
x_distance = bbox.x - x
elif x > bbox.width + bbox.x:
x_distance = bbox.width + bbox.x - x
else:
x_distance = 0
if y < bbox.y:
y_distance = bbox.y - y
elif y > bbox.height + bbox.y:
y_distance = bbox.height + bbox.y - y
else:
y_distance = 0
if y_distance == 0 and x_distance == 0:
return 0.0
elif y_distance != 0 and x_distance == 0:
return abs(float(y_distance))
elif y_distance == 0 and x_distance != 0:
return abs(float(x_distance))
else:
x2 = bbox.x if x_distance > 0 else bbox.x + bbox.width
y2 = bbox.y if y_distance > 0 else bbox.y + bbox.height
return sqrt((x - x2)**2 + (y - y2)**2)
class CaribouWindowEntry(CaribouWindow):
__gtype_name__ = "CaribouWindowEntry"
def __init__(self):
placement = CaribouWindowPlacement(
xalign=CaribouWindowPlacement.START,
xstickto=CaribouWindowPlacement.ENTRY,
ystickto=CaribouWindowPlacement.ENTRY,
xgravitate=CaribouWindowPlacement.INSIDE,
ygravitate=CaribouWindowPlacement.OUTSIDE)
CaribouWindow.__init__(
self, placement, min_alpha=0.075, max_alpha=0.8)
def _calculate_axis(self, axis_placement, root_bbox):
offset = CaribouWindow._calculate_axis(self, axis_placement, root_bbox)
if axis_placement.axis == 'y':
if offset + self.allocation.height > root_bbox.height + root_bbox.y:
new_axis_placement = axis_placement.copy(align=CaribouWindowPlacement.START)
offset = CaribouWindow._calculate_axis(self, new_axis_placement, root_bbox)
return offset
class CaribouWindowPlacement(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, stickto, gravitate):
self.axis = axis
self.align = align
self.stickto = stickto
self.gravitate = gravitate
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 adjust_to_bounds(self, root_bbox, child_bbox):
child_vector_start = self.get_offset(child_bbox)
child_vector_end = self.get_length(child_bbox) + child_vector_start
root_vector_start = self.get_offset(root_bbox)
root_vector_end = self.get_length(root_bbox) + root_vector_start
if root_vector_end < child_vector_end:
return root_vector_end - child_vector_end
if root_vector_start > child_vector_start:
return root_vector_start - child_vector_start
return 0
def __init__(self,
xalign=None, xstickto=None, xgravitate=None,
yalign=None, ystickto=None, ygravitate=None):
self.x = self._AxisPlacement('x',
xalign or self.END,
xstickto or self.CURSOR,
xgravitate or self.OUTSIDE)
self.y = self._AxisPlacement('y',
yalign or self.END,
ystickto or self.CURSOR,
ygravitate or self.OUTSIDE)
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