User:Mdengler

Revision as of 15:44, 17 October 2011 (view source) Mdengler (Talk | contribs) (add python tricks section) ← Older edit		Latest revision as of 16:33, 17 October 2011 (view source) Mdengler (Talk | contribs) (update python example)
Line 178:		Line 178:
	from QtMobility import Sensors		from QtMobility import Sensors
-	class AccelListener(QtCore.QObject):	+
-	def __init__(self):	+
		+	class XYZReadingListener(QtCore.QObject):
		+	def __init__(self, reading_prefix=None):
	QtCore.QObject.__init__(self)		QtCore.QObject.__init__(self)
	self.rotation = (0.0, 0.0, 0.0)		self.rotation = (0.0, 0.0, 0.0)
		+	if reading_prefix is not None:
		+	self.reading_prefix = reading_prefix + " "
		+	else:
		+	self.reading_prefix = ""
	@QtCore.Slot()		@QtCore.Slot()
	def on_reading_changed(self):		def on_reading_changed(self):
-	accel = self.sender()	+	reader = self.sender()
-	reading = accel.reading()	+	reading = reader.reading()
	self.rotation = (reading.x(),		self.rotation = (reading.x(),
	reading.y(),		reading.y(),
	reading.z())		reading.z())
-	print "rotation = %s" % str(self.rotation)	+	print "%sreading = %s" % (self.reading_prefix, self.rotation)
	app = QtGui.QApplication(sys.argv)		app = QtGui.QApplication(sys.argv)
-	accel = Sensors.QAccelerometer()
-	accel_listener = AccelListener()	+	accel = Sensors.QAccelerometer()
		+	accel_listener = XYZReadingListener("Accelerometer")
	accel.readingChanged.connect(accel_listener.on_reading_changed)		accel.readingChanged.connect(accel_listener.on_reading_changed)
	accel.start()		accel.start()
		+
		+	magnetometer = Sensors.QMagnetometer()
		+	magnetometer_listener = XYZReadingListener("Magnetometer")
		+	magnetometer.readingChanged.connect(magnetometer_listener.on_reading_changed)
		+	magnetometer.start()
	sys.exit(app.exec_())		sys.exit(app.exec_())
		+	</pre>
		+
		+
		+	Output example:
		+
		+	<pre>
		+	user@RM680:~$ python -i src/play.py
		+	Using the meego graphics system
		+	loaded the Generic plugin
		+	loaded the grue plugin
		+	Loaded the MeeGo sensor plugin
		+	Setting data rate 0 Hz (interval 0 ms) for "meego.accelerometer"
		+	Setting data rate 0 Hz (interval 0 ms) for "meego.magnetometer"
		+	Accelerometer reading = (2.4728419780731201, 6.7119998931884766, -6.3587369918823242)
		+	Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
		+	Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
		+	Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
		+	Accelerometer reading = (3.1793684959411621, 5.6522102355957031, -6.5353684425354004)
		+	Accelerometer reading = (3.1793684959411621, 5.8288421630859375, -7.0652632713317871)
		+	Accelerometer reading = (5.475578784942627, 2.1195788383483887, -7.2418947219848633)
		+	Accelerometer reading = (7.0652632713317871, -1.5896842479705811, -6.5353684425354004)
		+	Accelerometer reading = (7.5951576232910156, -4.2391576766967773, -6.1821050643920898)
		+	Accelerometer reading = (6.1821050643920898, -4.7690525054931641, -6.5353684425354004)
		+	Magnetometer reading = (-5.0219998229295015e-05, 0.00010898999607888982, -2.5349998395540752e-05)
		+	Accelerometer reading = (5.8288421630859375, -3.885894775390625, -6.7119998931884766)
		+	Accelerometer reading = (5.475578784942627, -3.885894775390625, -7.0652632713317871)
		+	Accelerometer reading = (6.1821050643920898, -3.5326316356658936, -6.3587369918823242)
		+	Accelerometer reading = (6.0054736137390137, -4.2391576766967773, -6.5353684425354004)
		+	Accelerometer reading = (6.1821050643920898, -4.0625262260437012, -6.5353684425354004)
		+	Accelerometer reading = (6.1821050643920898, -2.8261051177978516, -7.0652632713317871)
		+	Magnetometer reading = (-6.2699997215531766e-05, 0.00012944999616593122, -2.939999831141904e-05)
	</pre>		</pre>

---

Latest revision as of 16:33, 17 October 2011

I'm a python developer in real life and enjoyed hacking on my N900 so much that I wanted to continue with the N9/N950. My application for the N950 was accepted and I'm starting the two projects:

• tron-like game port
• location-based ringtone management

Contents 1 scratchbox on Fedora 1.1 start / login 1.2 quick and dirty package build 1.3 things to do once 1.4 my Harmattan debs 1.5 background 2 skype trick 3 dbus tricks 4 Checking whether Aegis is securing a file / inode 5 command-line coding workflow 6 N950 data storage and backup locations 7 Python tricks 7.1 QtMobility Accelerometer example

scratchbox on Fedora

start / login

sudo /scratchbox/sbin/sbox_ctl start && sudo /scratchbox/sbin/sbox_sync && /scratchbox/login

quick and dirty package build

apt-get source python-minimal
cd python-defaults-2.6.6-3+squeeze4/
dpkg-buildpackage -sa -rfakeroot -kmartin@martindengler.com
fakeroot apt-get install debiandoc-sgml lsb-release
dpkg-buildpackage -sa -rfakeroot -kmartin@martindengler.com
aegis-manifest -d

things to do once

• edit /etc/apt/sources.list in scratchbox (TODO: include what?)
• copy / create you GPG private key in .gnupg
• patch /scratchbox/users/*/targets/HARMATTAN_*/usr/lib/python2.6/urllib2.py if you're going to use the rpm/packaged osc, since you will have a problem with scratchbox's urllib2.py as in http://bugs.python.org/issue9639

my Harmattan debs

http://repo.pub.meego.com/home:/mdengler/MeeGo_1.2_Harmattan_Maemo.org_MeeGo_1.2_Harmattan_standard/

background

• Aegis
• Nokia Packaging Guide
• aegis xsd
• Debian New Maintainer's Guide
• [1]
• Desktop file entry spec

skype trick

http://wiki.meego.com/Migrating_from_N900_to_N950#GTalk_and_Skype_account_setup

dbus tricks

qdbus --system org.freedesktop.DBus / org.freedesktop.DBus.ListNames dbus-send --system --type=method_call --print-reply --dest=com.nokia.time /com/nokia/time org.freedesktop.DBus.Introspectable.Introspect

dbus-send --system --type=method_call --print-reply --dest=com.nokia.time /com/nokia/time com.nokia.time.enable_alarms boolean:"false"

dbus-send --system --type=method_call --print-reply --dest=com.nokia.time /com/nokia/time com.nokia.time.alarms_enabled

dbus-send --system --type=method_call --print-reply --dest=com.nokia.time /com/nokia/time com.nokia.time.get_cookies_by_attributes dict:string:string:"",""

Checking whether Aegis is securing a file / inode

~ # ls -i /bin/sh

144908 /bin/sh

~ # sha1sum /bin/sh 7fd44caa86b259e8724f5da10adfcc7fee4e0a16 /bin/sh ~ # grep 144908 /sys/kernel/security/validator/hashlist 9990003 144908 (0,0,33261)S no 7fd44caa86b259e8724f5da10adfcc7fee4e0a16

1. note how both the inode number and sha1sum are present

~ # ls -i /etc/mce/mce.ini

143850 /etc/mce/mce.ini

~ # grep 143850 /sys/kernel/security/validator/hashlist

1. nothing there - so aegis isn't monitoring it

command-line coding workflow

from http://www.developer.nokia.com/Community/Discussion/showthread.php?227292-Problem-deploying-project-on-N950-using-MADDE

N950 data storage and backup locations

Item	Filesystem	Backup
Contacts
Recent Calls
Web history
Messages
Email
Pictures (Gallery/Camera)
Music
Videos
Calendar
Documents
Feeds
Accounts
Clock (Alarms)
Settings
Notes
Autostart applications	/usr/share/autostart/tracker-miner-fs.desktop
Extensions & Status menu applications	/usr/share/meegotouch/applicationextensions
Application Launcher icons	/usr/share/applications and /usr/share/applications/installer-extra
QuickLaunch Bar Application Launcher icons	/etc/xdg/meegotouchhome-nokia/applications/

Python tricks

QtMobility Accelerometer example

import sys, os

from PySide import QtCore, QtGui, QtDeclarative, QtOpenGL
from QtMobility import Sensors



class XYZReadingListener(QtCore.QObject):
    def __init__(self, reading_prefix=None):
        QtCore.QObject.__init__(self)
        self.rotation = (0.0, 0.0, 0.0)
        if reading_prefix is not None:
            self.reading_prefix = reading_prefix + " "
        else:
            self.reading_prefix = ""

    @QtCore.Slot()
    def on_reading_changed(self):
        reader = self.sender()
        reading = reader.reading()
        self.rotation = (reading.x(),
                         reading.y(),
                         reading.z())
        print "%sreading = %s" % (self.reading_prefix, self.rotation)


app = QtGui.QApplication(sys.argv)

accel = Sensors.QAccelerometer()
accel_listener = XYZReadingListener("Accelerometer")
accel.readingChanged.connect(accel_listener.on_reading_changed)
accel.start()

magnetometer = Sensors.QMagnetometer()
magnetometer_listener = XYZReadingListener("Magnetometer")
magnetometer.readingChanged.connect(magnetometer_listener.on_reading_changed)
magnetometer.start()

sys.exit(app.exec_())

Output example:

user@RM680:~$ python -i src/play.py
Using the meego graphics system
loaded the Generic plugin 
loaded the grue plugin 
Loaded the MeeGo sensor plugin 
Setting data rate 0 Hz (interval 0 ms) for "meego.accelerometer" 
Setting data rate 0 Hz (interval 0 ms) for "meego.magnetometer" 
Accelerometer reading = (2.4728419780731201, 6.7119998931884766, -6.3587369918823242)
Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
Accelerometer reading = (2.6494736671447754, 7.0652632713317871, -6.3587369918823242)
Accelerometer reading = (3.1793684959411621, 5.6522102355957031, -6.5353684425354004)
Accelerometer reading = (3.1793684959411621, 5.8288421630859375, -7.0652632713317871)
Accelerometer reading = (5.475578784942627, 2.1195788383483887, -7.2418947219848633)
Accelerometer reading = (7.0652632713317871, -1.5896842479705811, -6.5353684425354004)
Accelerometer reading = (7.5951576232910156, -4.2391576766967773, -6.1821050643920898)
Accelerometer reading = (6.1821050643920898, -4.7690525054931641, -6.5353684425354004)
Magnetometer reading = (-5.0219998229295015e-05, 0.00010898999607888982, -2.5349998395540752e-05)
Accelerometer reading = (5.8288421630859375, -3.885894775390625, -6.7119998931884766)
Accelerometer reading = (5.475578784942627, -3.885894775390625, -7.0652632713317871)
Accelerometer reading = (6.1821050643920898, -3.5326316356658936, -6.3587369918823242)
Accelerometer reading = (6.0054736137390137, -4.2391576766967773, -6.5353684425354004)
Accelerometer reading = (6.1821050643920898, -4.0625262260437012, -6.5353684425354004)
Accelerometer reading = (6.1821050643920898, -2.8261051177978516, -7.0652632713317871)
Magnetometer reading = (-6.2699997215531766e-05, 0.00012944999616593122, -2.939999831141904e-05)