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# LevelActivity.py
# Copyright (C) 2012 Aneesh Dogra <lionaneesh@gmail.com>
#
# 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 gi.repository import Gtk
from gi.repository import GObject
from sugar3.activity import widgets
from sugar3.activity.widgets import StopButton
from sugar3.activity import activity
from math import pi, sqrt
from gettext import gettext as _
from collections import deque
ACCELEROMETER_DEVICE = '/sys/devices/platform/lis3lv02d/position'
#ACCELEROMETER_DEVICE = 'a.txt'
def read_accelerometer(canvas):
fh = open(ACCELEROMETER_DEVICE)
string = fh.read()
xyz = string[1:-2].split(',')
try:
x = float(xyz[0]) / (64 * 18)
y = float(xyz[1]) / (64 * 18)
fh.close()
canvas.motion_cb(x, y)
except:
pass
GObject.timeout_add(100, read_accelerometer, canvas)
class MyCanvas(Gtk.DrawingArea):
''' Create a GTK+ widget on which we will draw using Cairo '''
def __init__(self):
Gtk.DrawingArea.__init__(self)
self._draw_ruler = False
self._object = None
self.connect('draw', self._draw_cb)
self._dpi = 96
self.cr = None
self.width = 0
self.height = 0
self.radius = 0
self.x = 0
self.y = 0
self.center = (0, 0)
self.prev = deque([])
self.ball_radius = 20
def _draw_cb(self, drawing_area, cr):
self.center = (self.width / 2, self.height / 2)
self.radius = min(self.width / 2, self.height / 2) - \
self.ball_radius - 20
self.cr = cr
cr.set_line_width(2)
self.width = drawing_area.get_allocated_width()
self.height = drawing_area.get_allocated_height()
cr.set_source_rgb(1, 1, 1)
cr.rectangle(0, 0, self.width, self.height)
cr.fill()
cr.set_source_rgb(0.9450, 0.9450, 0.9450)
cr.arc(self.center[0], self.center[1],
self.radius, 0,
2 * pi)
cr.fill()
cr.set_source_rgb(0, 0, 0)
cr.arc(self.center[0], self.center[1],
self.ball_radius + 2, 0,
2 * pi)
cr.stroke()
cr.arc(self.center[0], self.center[1],
self.radius / 3, 0,
2 * pi)
cr.stroke()
cr.arc(self.center[0], self.center[1],
self.radius * 2 / 3, 0,
2 * pi)
cr.stroke()
cr.arc(self.center[0], self.center[1],
self.radius, 0,
2 * pi)
cr.stroke()
cr.move_to(self.center[0] - self.radius, self.center[1])
cr.line_to(self.center[0] + self.radius, self.center[1])
cr.stroke()
cr.move_to(self.center[0], self.center[1] - self.radius)
cr.line_to(self.center[0], self.center[1] + self.radius)
cr.stroke()
self.update_ball_and_text()
def update_ball_and_text(self):
# Build the ball
self.cr.set_source_rgb(0.3012, 0.6, 1) # blue
self.cr.arc(self.x, self.y, self.ball_radius, 0, 2 * pi)
self.cr.fill()
# Now update the text
# 1. Clear Text
self.cr.set_source_rgb(1, 1, 1) # white
self.cr.rectangle(self.width - 110, self.height - 110,
self.width, self.height)
self.cr.fill()
# 2. Update Text
self.cr.set_source_rgb(0, 0, 0) # black
self.cr.move_to(self.width - 100, self.height - 80)
self.cr.set_font_size(20)
# TRANS: X is for X axis
self.cr.show_text(_("X: %.2f") % (self.x - self.width / 2,))
self.cr.move_to(self.width - 99, self.height - 60)
self.cr.set_font_size(20)
# TRANS: Y is for Y axis
self.cr.show_text(_("Y: %.2f") % (self.y - self.height / 2,))
def motion_cb(self, x, y):
if len(self.prev) >= 2:
self.x = self.prev[-2][0] * 0.25 + self.prev[-1][0] * 0.5 + \
self.radius * x * 0.25
self.y = self.prev[-2][1] * 0.25 + self.prev[-1][1] * 0.5 + \
self.radius * y * 0.25
self.prev.popleft()
self.prev.append([self.x, self.y])
else:
self.x = self.radius * x
self.y = self.radius * y
self.prev.append([self.x, self.y])
if self.x and self.y:
r = sqrt((self.x * self.x) + (self.y * self.y))
r1 = min(r, self.radius)
scale = r1 / r
self.x *= scale
self.y *= scale
self.x += self.center[0]
self.y += self.center[1]
self.queue_draw()
class LevelActivity(activity.Activity):
def __init__(self, handle):
"The entry point to the Activity"
activity.Activity.__init__(self, handle)
toolbox = widgets.ActivityToolbar(self)
toolbox.share.props.visible = False
stop_button = StopButton(self)
stop_button.show()
toolbox.insert(stop_button, -1)
self.set_toolbar_box(toolbox)
toolbox.show()
# Draw the canvas
self._canvas = MyCanvas()
self.set_canvas(self._canvas)
self._canvas.show()
GObject.timeout_add(100, read_accelerometer, self._canvas)
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