From 6e82c5964e31f3cc937911069709af9830071338 Mon Sep 17 00:00:00 2001
From: Aleksey Lim <alsroot@member.fsf.org>
Date: Fri, 25 Dec 2009 15:34:56 +0000
Subject: Use only one directory level for sources

---
(limited to 'eye.py')

diff --git a/eye.py b/eye.py
new file mode 100644
index 0000000..72f058e
--- /dev/null
+++ b/eye.py
@@ -0,0 +1,146 @@
+# Speak.activity
+# A simple front end to the espeak text-to-speech engine on the XO laptop
+# http://wiki.laptop.org/go/Speak
+#
+# 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.
+# 
+#     Speak.activity 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 Speak.activity.  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, fill_color):
+        gtk.DrawingArea.__init__(self)
+        self.connect("expose_event", self.expose)
+        self.frame = 0
+        self.blink = False
+        self.x, self.y = 0,0
+        self.fill_color = fill_color
+
+        # 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)
+
+    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 look_at(self, x, y):
+        self.x = x
+        self.y = y
+        self.queue_draw()
+
+    def look_ahead(self):
+        self.x = None
+        self.y = None
+        self.queue_draw()
+
+    # Thanks to xeyes :)
+    def computePupil(self):
+        a = self.get_allocation()
+
+        if self.x is None or self.y is None:
+            # look ahead, but not *directly* in the middle
+            if a.x + a.width/2 < self.parent.get_allocation().width/2:
+                cx = a.width * 0.6
+            else:
+                cx = a.width * 0.4
+            return cx, a.height * 0.6
+
+        EYE_X, EYE_Y = self.translate_coordinates(
+                self.get_toplevel(), a.width/2, a.height/2)
+        EYE_HWIDTH = a.width
+        EYE_HHEIGHT = a.height
+        BALL_DIST = EYE_HWIDTH/4
+
+        dx = self.x - EYE_X
+        dy = self.y - EYE_Y
+
+        if dx or dy:
+            angle = math.atan2(dy, dx)
+            cosa = math.cos(angle)
+            sina = math.sin(angle)
+            h = math.hypot(EYE_HHEIGHT * cosa, EYE_HWIDTH * sina)
+            x = (EYE_HWIDTH * EYE_HHEIGHT) * cosa / h
+            y = (EYE_HWIDTH * EYE_HHEIGHT) * sina / h
+            dist = BALL_DIST * math.hypot(x, y)
+
+            if dist < math.hypot(dx, dy):
+                dx = dist * cosa
+                dy = dist * sina
+
+        return a.width/2 + dx, a.height/2 + dy
+
+    def expose(self, widget, event):
+        self.frame += 1
+        bounds = self.get_allocation()
+
+        eyeSize = min(bounds.width, bounds.height)
+        outlineWidth = eyeSize/20.0
+        pupilSize = eyeSize/10.0
+        pupilX, pupilY = self.computePupil()
+        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_rgba(*self.fill_color.get_rgba())
+        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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