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# Speak.activity
# A simple front end to the espeak text-to-speech engine on the XO laptop
#
# Copyright (C) 2008 Joshua Minor
# This file is part of Speak.activity
#
# Parts of Speak.activity are based on code from Measure.activity
# Copyright (C) 2007 Arjun Sarwal - arjun@laptop.org
#
# Speak.activity 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 3 of the License, or
# (at your option) any later version.
#
# Foobar 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
import pygtk
import gtk
import gtk.gdk
import gobject
import cairo
import math
class Eye(gtk.DrawingArea):
def __init__(self):
gtk.DrawingArea.__init__(self)
self.connect("expose_event",self.expose)
self.frame = 0
self.blink = False
# listen for clicks
self.add_events(gtk.gdk.BUTTON_PRESS_MASK)
self.add_events(gtk.gdk.BUTTON_RELEASE_MASK)
self.connect("button_press_event", self._mouse_pressed_cb)
self.connect("button_release_event", self._mouse_released_cb)
# Instead of listening for mouse move events we could poll to see if the mouse has moved
# would let us react to the mouse even when it isn't directly over this widget.
# Unfortunately that would cause a lot of CPU usage. So instead we rely on our parent to
# tell us to redraw when the mouse has moved. We still need to call add_events so that
# our parent will get mouse motion events, but we don't connect the callback for them ourselves.
self.add_events(gtk.gdk.POINTER_MOTION_MASK)
# self.connect("motion_notify_event", self._mouse_moved_cb)
def _mouse_moved_cb(self, widget, event):
self.queue_draw()
def _mouse_pressed_cb(self, widget, event):
self.blink = True
self.queue_draw()
def _mouse_released_cb(self, widget, event):
self.blink = False
self.queue_draw()
def get_mouse(self):
display = gtk.gdk.display_get_default()
screen, mouseX, mouseY, modifiers = display.get_pointer()
return mouseX, mouseY
def expose(self, widget, event):
self.frame += 1
bounds = self.get_allocation()
mouseX, mouseY = self.get_mouse()
eyeSize = min(bounds.width, bounds.height)
outlineWidth = eyeSize/20.0
pupilSize = eyeSize/10.0
pupilX = max(min(mouseX - bounds.x, bounds.width), 0)
pupilY = max(min(mouseY - bounds.y, bounds.height), 0)
dX = pupilX - bounds.width/2.
dY = pupilY - bounds.height/2.
distance = math.sqrt(dX*dX + dY*dY)
limit = eyeSize/2 - outlineWidth*2 - pupilSize
if distance > limit:
pupilX = bounds.width/2 + dX*limit/distance
pupilY = bounds.height/2 + dY*limit/distance
self.context = widget.window.cairo_create()
#self.context.set_antialias(cairo.ANTIALIAS_NONE)
#set a clip region for the expose event. This reduces redrawing work (and time)
self.context.rectangle(event.area.x, event.area.y, event.area.width, event.area.height)
self.context.clip()
# background
self.context.set_source_rgb(.5,.5,.5)
self.context.rectangle(0,0,bounds.width,bounds.height)
self.context.fill()
# eye ball
self.context.arc(bounds.width/2,bounds.height/2, eyeSize/2-outlineWidth/2, 0,360)
self.context.set_source_rgb(1,1,1)
self.context.fill()
# outline
self.context.set_line_width(outlineWidth)
self.context.arc(bounds.width/2,bounds.height/2, eyeSize/2-outlineWidth/2, 0,360)
self.context.set_source_rgb(0,0,0)
self.context.stroke()
# pupil
self.context.arc(pupilX,pupilY,pupilSize,0,360)
self.context.set_source_rgb(0,0,0)
self.context.fill()
self.blink = False
return True
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