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• How can I upload to a PPA without .changes file?

  - by espectalll123

  So, I'm developing an app for the Ubuntu Showdown, and as quickly is still very buggy (I had problems using it), I decided to do my app entirely from scratch, using Python/GTK+3. I've done my app and I've just packaged it just using only fakebuild dkpg-deb --build. The problem is that I can't create a .source file, as I don't have a changelog file and the debian folder cannot be used in debuild, as is uncorrectly organized. The text shown by ls -l -R: .: total 16 -rw-rw-r-- 1 francisco francisco 2 jul 3 17:48 compat drwxrwxr-x 2 francisco francisco 4096 jul 3 20:37 DEBIAN drwxrwxr-x 3 francisco francisco 4096 jul 3 18:36 opt drwxrwxr-x 3 francisco francisco 4096 jul 3 20:40 usr ./DEBIAN: total 36 -rwxr-xr-x 1 francisco francisco 1327 jul 3 20:26 control -rwxr-xr-x 1 francisco francisco 1329 jul 3 20:17 control~ -rwxr-xr-x 1 francisco francisco 10 jul 3 20:20 postinst -rwxr-xr-x 1 francisco francisco 10 jul 3 20:36 postrm -rwxr-xr-x 1 francisco francisco 121 jul 3 20:35 postrm~ -rwxr-xr-x 1 francisco francisco 10 jul 3 20:20 preinst -rwxr-xr-x 1 francisco francisco 10 jul 3 20:20 prerm -rwxr-xr-x 1 francisco francisco 530 jul 3 20:37 rules -rwxr-xr-x 1 francisco francisco 530 jul 3 20:37 rules~ ./opt: total 4 drwxrwxr-x 3 francisco francisco 4096 jul 3 18:36 espectalll123 ./opt/espectalll123: total 4 drwxrwxr-x 2 francisco francisco 4096 jul 3 18:36 virtuam ./opt/espectalll123/virtuam: total 28 -rw-rw-r-- 1 francisco francisco 12614 jun 27 13:58 assistant.glade -rwxrwxr-x 1 francisco francisco 758 jun 30 17:53 virtuam -rwxr-xr-x 1 francisco francisco 6285 jul 3 17:39 vui.py ./usr: total 4 drwxrwxr-x 4 francisco francisco 4096 jul 3 20:46 share ./usr/share: total 8 drwxrwxr-x 2 francisco francisco 4096 jul 3 20:46 applications drwxrwxr-x 2 francisco francisco 4096 jul 3 20:40 pixmaps ./usr/share/applications: total 4 -rwxrwxr-x 1 francisco francisco 304 jul 3 20:43 virtuam.desktop ./usr/share/pixmaps: total 188 -rw-r--r-- 1 francisco francisco 189478 jun 30 17:42 virtuam.svg So, this is the question: can I upload my app to the PPA without the .source file? If not, how can I create it?

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• Glade: How can I set the value of a spin button?

  - by espectalll123

  I've done some spin buttons with Glade for my Python/GTK3 app, but I don't know how to set things like default, lower or higher value. How can I do it? Using the following things for development: Python 2.7.3 GTK 3 Glade 3.12.1 1) I need to change things from script, as I need to set default value and maximum value as a variable; 2) I saw the PyGTK documentation before, it's not working for GTK3; 3) please don't direct me to the GTK3 docummentation... I can't understand it :P

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• Is there a simple "Hello World" for making games?

  - by a.m.

  Does anyone know of a simple "Hello World" for making games for ubuntu? I've seen the Getting Started with Quickly video. Any examples for platformers or something like that? EDIT: Just a recap of the answers. Blender Game engine -- Uses python Pygame -- Python MonoGame http://monogame.codeplex.com/ -- some sort of XNA ? QuakeC -- This a Quake flavored C like lang. See: Steel Storm http://one.steel-storm.com/

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• Book Review (Book 11) - Applied Architecture Patterns on the Microsoft Platform

  - by BuckWoody

  This is a continuation of the books I challenged myself to read to help my career - one a month, for year. You can read my first book review here, and the entire list is here. The book I chose for April 2012 was: Applied Architecture Patterns on the Microsoft Platform. I was traveling at the end of last month so I’m a bit late posting this review here. Why I chose this book: I actually know a few of the authors on this book, so when they told me about it I wanted to check it out. The premise of the book is exactly as it states in the title - to learn how to solve a problem using products from Microsoft. What I learned: I liked the book - a lot. They've arranged the content in a "Solution Decision Framework", that presents a few elements to help you identify a need and then propose alternate solutions to solve them, and then the rationale for the choice. But the payoff is that the authors then walk through the solution they implement and what they ran into doing it. I really liked this approach. It's not a huge book, but one I've referred to again since I've read it. It's fairly comprehensive, and includes server-oriented products, not things like Microsoft Office or other client-side tools. In fact, I would LOVE to have a work like this for Open Source and other vendors as well - would make for a great library for a Systems Architect. This one is unashamedly aimed at the Microsoft products, and even if I didn't work here, I'd be fine with that. As I said, it would be interesting to see some books on other platforms like this, but I haven't run across something that presents other systems in quite this way. And that brings up an interesting point - This book is aimed at folks who create solutions within an organization. It's not aimed at Administrators, DBA's, Developers or the like, although I think all of those audiences could benefit from reading it. The solutions are made up, and not to a huge level of depth - nor should they be. It's a great exercise in thinking these kinds of things through in a structured way. The information is a bit dated, especially for Windows and SQL Azure. While the general concepts hold, the cloud platform from Microsoft is evolving so quickly that any printed book finds it hard to keep up with the improvements. I do have one quibble with the text - the chapters are a bit uneven. This is always a danger with multiple authors, but it shows up in a couple of chapters. I winced at one of the chapters that tried to take a more conversational, humorous style. This kind of academic work doesn't lend itself to that style. I recommend you get the book - and use it. I hope they keep it updated - I'll be a frequent customer. :)  

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• What is the version numbering logic for open source developers managing software releases?

  - by Stephen Myall

  I guess this is more of a general question that I cant find the the answer to anywhere. What is the version numbering logic for open source developers managing software releases and is there any governance or guidance I can read up on. The origins of this question comes from me reviewing and researching software on countless websites that I would like to use on my Ubuntu OS. Through experience, I am learning some sites are much better than others explaining if a release is a stable, experimental or maintenance release but these explanations are not consistent with any version numbering logic I am familiar with.

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• Moving from building internal applications as WPF to ASP NET MVC?

  - by stuartmclark

  I have worked on quite a few internal applications for my work and I have always defaulted to using WPF, but I am considering re-writing existing ones into a web app. This is so that anyone in my company can use it without having to download anything from the network. I am just wondering if this is the way forward with any development of new internal applications? So, should I stop using WPF and start using ASP.NET MVC for internal applications that a lot of people need to use?

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• Facing problem with "gtk.RESPONSE_OK" in the simple-player quickly tutorial

  - by sumit_gt

  I am fairly new to both quickly and Python. I am facing several problems while learning to use quickly from the following tutorial on the Ubuntu developers site: http://developer.ubuntu.com/resources/app-developer-cookbook/multimedia/creating-a-simple-media-player/ The following error I'm unable to understand: Traceback (most recent call last): File "/home/sumit/Sumit/simple-player/simple_player/SimplePlayerWindow.py", line 36, in on_openbutton_clicked if response==gtk.RESPONSE_OK: NameError: global name 'gtk' is not defined I realize that I am supposed to import something, so I tried to add import gtk which it didn't work and it gave the following error: from gtk import _gtk /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed from gtk import _gtk I have followed every step of the tutorials so far. But there is no mention of any other imports other that "prompts" and "os". Please help. Contribution of Agmenor, facing the same problem: I also tried to replace the text if response == gtk.RESPONSE_OK: by if response == Gtk.RESPONSE_OK: (notice the capital G). This gives another error: AttributeError: 'gi.repository.Gtk' object has no attribute 'RESPONSE_OK'

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• 'Quickly': How can I use Ruby?

  - by ragu.pattabi

  Recently I came across Quickly. A very nice thing Ubuntu is doing in order to simplify creation of good looking applications that integrates well with Ubuntu desktop in every respect. While the demo was so cool and even motived me to learn Python, I am only familiar with Ruby. I would really love if there is a way to make Quickly do similar thing with Ruby. I read something about templates; but couldn't locate much details.

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• Change font programmatically for GTK3 TextView (quickly-widgets TextEditor)

  - by monotasker

  In an app using PyGI and GTK3, I'm trying to let the user set the font family and size in a TextView through my app's settings dialog. In PyGI the TextView object has "set" methods for several properties, but not for font properties. I can set the font family via CSS using a CSS style provider. But I can't change that CSS dynamically to respect the font selected by a user. So how can I do this? (Note that the widget in question is actually the TextEditor from the quickly-widgets package and I'm using Quickly to build the app.) Thanks, Ian

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• Why changing signals causes NameErrors in a sane code? - PyGtk issue

  - by boywithaxe

  I'm working on a very simple app for Ubuntu. I've asked a question on stackoverflow, and it seems that the issue I am having is caused by signals, not by the scope of variables, as I originally thought. The problem I am having is that when TextBox emits a signal through activate the whole code works without a glitch. But when I change the signal to insert-at-click it returns NameErrors in every non-TextBox-linked function. Now, It is highly possible I am doing something completely wrong here, but is it at least probable that signals could affect global variable assignments?

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• Enabling Multi-touch features of the Apple Magic Mouse on Ubuntu 12.04

  - by Martin

  I want to write a simple app that uses Apple's Magic Trackpad, nothing special, just so that it recognizes atleast one gesture. The thing is, Ubuntu itself doesnt really recognize this device. I'm using Ubuntu 12.04 and by default the device works with 1 finger, but without tap-click or doubletap, 3 fingers move the window and 3 finger spread makes it fullscreen. I managed to enable 2 finger scrolling with "xinput set-prop 8 'Two-Finger Scrolling' 1 1", but thats about it. No other gestures work, ginn doesnt start, giesview detects the device but doesnt respond to any of the gestures, and touchegg doesnt start either. I tried example apps from qt that come with ubuntu but they dont work. So... what do i do? i tried using qt but all i get from the app is "Got touch without getting TouchBegin for id XX" what else can i use to get my app to work with multitouch devices?

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• Keybindings for individual letter keys (not modifier-combinations) on a GtkTextView widget (Gtk3 and PyGI)

  - by monotasker

  I've been able to set several keybord shortcuts for a GtkTextView and a GtkTextEntry using the new css provider system. I'm finding, though, that I only seem to be able to establish keybindings for combinations including a modifier key. The widget doesn't respond to any bindings I set up that use: the delete key the escape key individual letter or punctuation keys alone Here's the code where I set up the css provider for the keybindings: #set up style context keys = Gtk.CssProvider() keys.load_from_path(os.path.join(data_path, 'keybindings.css')) #set up style contexts and css providers widgets = {'window': self.window, 'vbox': self.vbox, 'toolbar': self.toolbar, 'search_entry': self.search_entry, 'paned': self.paned, 'notelist_treeview': self.notelist_treeview, 'notelist_window': self.notelist_window, 'notetext_window': self.notetext_window, 'editor': self.editor, 'statusbar': self.statusbar } for l, w in widgets.iteritems(): w.get_style_context().add_provider(keys, Gtk.STYLE_PROVIDER_PRIORITY_USER) Then in keybindings.css this is an example of what works: @binding-set gtk-vi-text-view { bind "<ctrl>b" { "move-cursor" (display-lines, -5, 0) }; /* 5 lines up */ bind "<ctrl>k" { "move-cursor" (display-lines, -1, 0) }; /* down */ bind "<ctrl>j" { "move-cursor" (display-lines, 1, 0) }; /* up */ } Part of what I'm trying to do is just add proper delete-key function to the text widgets (right now the delete key does nothing at all). So if I add a binding like one of these, nothing happens: bind "Delete" { "delete-selection" () }; bind "Delete" { "delete-from-cursor" (chars, 1) }; The other part of what I want to do is more elaborate. I want to set up something like Vim's command and visual modes. So at the moment I'm just playing around with (a) setting the widget to editable=false by hitting the esc key; and (b) using homerow letters to move the cursor (as a proof-of-concept exercise). So far there's no response from the escape key or from the letter keys, even though the bindings work when I apply them to modifier-key combinations. For example, I do this in the css for the text-widget: bind "j" { "move-cursor" (display-lines, 1, 0) }; /* down */ bind "k" { "move-cursor" (display-lines, -1, 0) }; /* up */ bind "l" { "move-cursor" (logical-positions, 1, 0) }; /* right */ bind "h" { "move-cursor" (logical-positions, -1, 0) }; /* left */ but none of these bindings does anything, even if other bindings in the same set are respected. What's especially odd is that the vim-like movement bindings above are respected when I attach them to a GtkTreeView widget for navigating the tree-view options: @binding-set gtk-vi-tree-view { bind "j" { "move-cursor" (display-lines, 1) }; /* selection down */ bind "k" { "move-cursor" (display-lines, -1) }; /* selection up */ } So it seems like there are limitations or overrides of some kind on keybindings for the TextView widget (and for the del key?), but I can't find documentation of anything like that. Are these just things that can't be done with the css providers? If so, what are my alternatives for non-modified keybindings? Thanks.

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• Error when adding indicator in quickly

  - by tachyons

  I just started new project using quickly Eevery thing work perfectly .I decided to add an indicator to my program I used the command quickly add indicator using the command quickly add indicator . After that my project stoped working It shows the following error quickly run /usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py:391: Warning: g_object_set_property: construct property "type" for object `Window' can't be set after construction Gtk.Window.__init__(self, type=type, **kwargs) Traceback (most recent call last): File "bin/mytube", line 33, in <module> mytube.main() File "/home/aboobacker/mytube/mytube/__init__.py", line 33, in main window = MytubeWindow.MytubeWindow() File "/home/aboobacker/mytube/mytube_lib/Window.py", line 35, in __new__ new_object.finish_initializing(builder) File "/home/aboobacker/mytube/mytube/MytubeWindow.py", line 24, in finish_initializing super(MytubeWindow, self).finish_initializing(builder) File "/home/aboobacker/mytube/mytube_lib/Window.py", line 75, in finish_initializing self.indicator = indicator.new_application_indicator(self) File "/home/aboobacker/mytube/mytube/indicator.py", line 52, in new_application_indicator ind = Indicator(window) File "/home/aboobacker/mytube/mytube/indicator.py", line 20, in __init__ self.indicator = AppIndicator3.Indicator('mytube', '', AppIndicator3.IndicatorCategory.APPLICATION_STATUS) TypeError: GObject.__init__() takes exactly 0 arguments (3 given) How to fix it ?

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• Problems compiling with Quickly

  - by espectalll123

  Welcome to another of my questions about compiling! :P So, after days of stress trying to compile my app, first manually, after porting the project to Quickly, I decided to create the project from scratch using this time Quickly. Now I've finished the app, it works great using quickly run and I haven't added any new file, just removed, replaced or modified. But it can't be compiled using quickly package --verbose --extras... why, if there doesn't seems to be errors related with my project? The fail happens because python-mkdebian doesn't haves enough parameters to work. The terminal output (in Spanish): running install_egg_info Writing /tmp/tmpsT6Pms/virtuam-0.1.egg-info WARNING: the following files are not recognized by DistUtilsExtra.auto: help/C/figures/icon.png help/C/index.page help/C/preferences.page help/C/topic1.page virtuam.desktop.in Traceback (most recent call last): File "/usr/bin/python-mkdebian", line 368, in <module> egg = get_egg_info() File "/usr/bin/python-mkdebian", line 35, in get_egg_info k, v = l.strip().split(': ', 1) ValueError: need more than 1 value to unpack Ha ocurrido un error al crear el paquete Debian ERROR: no se puede crear o actualizar paquete ubuntu Error: la orden package ha fallado Cancelando

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• [Windows 8] An application bar toggle button

  - by Benjamin Roux

  To stay in the application bar stuff, here’s another useful control which enable to create an application bar button that can be toggled between two different contents/styles/commands (used to create a favorite/unfavorite or a play/pause button for example). namespace Indeed.Controls { public class AppBarToggleButton : Button { public bool IsChecked { get { return (bool)GetValue(IsCheckedProperty); } set { SetValue(IsCheckedProperty, value); } } public static readonly DependencyProperty IsCheckedProperty = DependencyProperty.Register("IsChecked", typeof(bool), typeof(AppBarToggleButton), new PropertyMetadata(false, (o, e) => (o as AppBarToggleButton).IsCheckedChanged())); public string CheckedContent { get { return (string)GetValue(CheckedContentProperty); } set { SetValue(CheckedContentProperty, value); } } public static readonly DependencyProperty CheckedContentProperty = DependencyProperty.Register("CheckedContent", typeof(string), typeof(AppBarToggleButton), null); public ICommand CheckedCommand { get { return (ICommand)GetValue(CheckedCommandProperty); } set { SetValue(CheckedCommandProperty, value); } } public static readonly DependencyProperty CheckedCommandProperty = DependencyProperty.Register("CheckedCommand", typeof(ICommand), typeof(AppBarToggleButton), null); public Style CheckedStyle { get { return (Style)GetValue(CheckedStyleProperty); } set { SetValue(CheckedStyleProperty, value); } } public static readonly DependencyProperty CheckedStyleProperty = DependencyProperty.Register("CheckedStyle", typeof(Style), typeof(AppBarToggleButton), null); public bool AutoToggle { get { return (bool)GetValue(AutoToggleProperty); } set { SetValue(AutoToggleProperty, value); } } public static readonly DependencyProperty AutoToggleProperty = DependencyProperty.Register("AutoToggle", typeof(bool), typeof(AppBarToggleButton), null); private object content; private ICommand command; private Style style; private void IsCheckedChanged() { if (IsChecked) { // backup the current content and command content = Content; command = Command; style = Style; if (CheckedStyle == null) Content = CheckedContent; else Style = CheckedStyle; Command = CheckedCommand; } else { if (CheckedStyle == null) Content = content; else Style = style; Command = command; } } protected override void OnTapped(Windows.UI.Xaml.Input.TappedRoutedEventArgs e) { base.OnTapped(e); if (AutoToggle) IsChecked = !IsChecked; } } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } To use it, it’s very simple. <ic:AppBarToggleButton Style="{StaticResource PlayAppBarButtonStyle}" CheckedStyle="{StaticResource PauseAppBarButtonStyle}" Command="{Binding Path=PlayCommand}" CheckedCommand="{Binding Path=PauseCommand}" IsChecked="{Binding Path=IsPlaying}" /> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } When the IsPlaying property (in my ViewModel) is true the button becomes a Pause button, when it’s false it becomes a Play button. Warning: Just make sure that the IsChecked property is set in last in your control !! If you don’t use style you can alternatively use Content and CheckedContent. Furthermore you can set the AutoToggle to true if you don’t want to control is IsChecked property through binding. With this control and the AppBarPopupButton, you can now create awesome application bar for your apps ! Stay tuned for more awesome Windows 8 tricks !

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• Absolute beginner to app developement [closed]

  - by Andrew Johnston

  I have two app ideas that I am trying to build. I have started at the Facebook developement pages and done the Heroku/Git thing. However, I have absolutely no idea of what I am doing. When they say on the developer page: follow these quick easy steps Are they assuming that they are talking to a programmer/developer? I believe my apps have huge potential but I don't want to disclose my ideas. Any advice? I also would like to know how does one make money from Facebook applications?

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• What You Said: How You Organize Your Apps

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your tips and tricks for keeping your apps organized and accessible; now we’re back to showcase some great reader tips to help you manage your mountain of apps. One of the trends was striving for consistency across environments. Henrique highlights how this plays out on a dual OS setup: On my windows desktop I use the taskbar and to keep my day to day applications (basically firefox, itunes, office, adobe, evernote and wunderkit), and whenever I need something else, I use windows built in search, which is quite fast, despite needing a few more clicks than spotlight would. On my macbook the dock is basically mirrors my taskbar, and I use spotlight for other applications, but launchpad is wining my heart a bit more every day. It’s faster then than accessing the applications folder and the windows start menu, and possibly even than spotlight, at least for apps How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage

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• how to save a gtktextbuffer content in file

  - by user1565593

  i tried to save sengtktextbuffer content in a file. my code seens working but i have a problem in file. some characters are unreadable in outfile outfile my code: def on_save_clicked(self, widget, data=None): start = self.textbuffer.get_start_iter() end = self.textbuffer.get_end_iter() this = self.textbuffer.get_text(start, end, False) format = self.textbuffer.register_serialize_tagset(this) data = self.textbuffer.serialize(self.textbuffer, format, start, end) outfile = open("/home/christophe/toto.txt", "w") outfile.write(data) outfile.close() what is wrong in my code? thanks for your help

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• Is this Ubuntu One DBus signal connection code correct?

  - by Chris Wilson

  This is my first time using DBus so I'm not entirely sure if I'm going about this the right way. I'm attempting to connect the the Ubuntu One DBus service and obtain login credentials for my app, however the slots I've connected to the DBus return signals detailed here never seem to be firing, despite a positive result being returned during the connection. Before I start looking for errors in the details relating to this specific service, could someone please tell me if this code would even work in the first place, or if I'm done something wrong here? int main() { UbuntuOneDBus *u1Dbus = new UbuntuOneDBus; if( u1Dbus->init() ){ qDebug() << "Message queued"; } } UbuntuOneDBus::UbuntuOneDBus() { service = "com.ubuntuone.Credentials"; path = "/credentials"; interface = "com.ubuntuone.CredentialsManagement"; method = "register"; signature = "a{ss} (Dict of {String, String})"; connectReturnSignals(); } bool UbuntuOneDBus::init() { QDBusMessage message = QDBusMessage::createMethodCall( service, path, interface, method ); bool queued = QDBusConnection::sessionBus().send( message ); return queued; } void UbuntuOneDBus::connectReturnSignals() { bool connectionSuccessful = false; connectionSuccessful = QDBusConnection::sessionBus().connect( service, path, interface, "CredentialsFound", "a{ss} (Dict of {String, String})", this, SLOT( credentialsFound() ) ); if( ! connectionSuccessful ) qDebug() << "Connection to DBus::CredentialsFound signal failed"; connectionSuccessful = QDBusConnection::systemBus().connect( service, path, interface, "CredentialsNotFound", "(nothing)", this, SLOT( credentialsNotFound() ) ); if( ! connectionSuccessful ) qDebug() << "Connection to DBus::CredentialsNotFound signal failed"; connectionSuccessful = QDBusConnection::systemBus().connect( service, path, interface, "CredentialsError", "a{ss} (Dict of {String, String})", this, SLOT( credential if( ! connectionSuccessful ) qDebug() << "Connection to DBus::CredentialsError signal failed"; } void UbuntuOneDBus::credentialsFound() { std::cout << "Credentials found" << std::endl; } void UbuntuOneDBus::credentialsNotFound() { std::cout << "Credentials not found" << std::endl; } void UbuntuOneDBus::credentialsError() { std::cout << "Credentials error" << std::endl; }

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• Transmitting Form Data from the Client to the Web Server

  The steps involved in transmitting form data from the client to the web server User loads web form User enters data in to web form fields User clicks submit On submit page validates fields using JavaScript. If validation errors are found then the validation script stops the browser from canceling posting the data to the web server and displays error messages as needed If the form passes the data validation process then the browser will URL encode the values of every field and post it to the server.  The server reads the posted data from the query string and then again validates the data just to ensure data consistency and to prevent any non-validated data because JavaScript was turned off on the clients browser from being inserted in to a database or passed on to other process If the data passes the second validation check then the server side code will continue with the requested processes

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• OpenOffice Calc doesn't show up in the alt-tab window switcher

  - by Abe

  I just upgraded to ubuntu 12.04, and it's mostly working. My biggest problem so far: OpenOffice/LibreOffice Calc doesn't show up under the task switcher. When I pres alt-tab to change windows, I can see all my windows except for any OpenOffice documents I have open. If I minimize other windows, then I can get to my Calc documents, but Alt-Tab just doesn't work. It only seems to be a problem with Calc. Writer and Impress both work fine. I do a lot of work in spreadsheets, so this is really messing up my flow. Any thoughts on how to fix it?

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• Designing Content-Based ETL Process with .NET and SFDC

  - by Patrick

  As my firm makes the transition to using SFDC as our main operational system, we've spun together a couple of SFDC portals where we can post customer-specific documents to be viewed at will. As such, we've had the need for pseudo-ETL applications to be implemented that are able to extract metadata from the documents our analysts generate internally (most are industry-standard PDFs, XML, or MS Office formats) and place in networked "queue" folders. From there, our applications scoop of the queued documents and upload them to the appropriate SFDC CRM Content Library along with some select pieces of metadata. I've mostly used DbAmp to broker communication with SFDC (DbAmp is a Linked Server provider that allows you to use SQL conventions to interact with your SFDC Org data). I've been able to create [console] applications in C# that work pretty well, and they're usually structured something like this: static void Main() { // Load parameters from app.config. // Get documents from queue. var files = someInterface.GetFiles(someFilterOrRegexPattern); foreach (var file in files) { // Extract metadata from the file. // Validate some attributes of the file; add any validation errors to an in-memory // structure (e.g. List<ValidationErrors>). if (isValid) { // Upload using some wrapper for an ORM an someInterface.Upload(meta.Param1, meta.Param2, ...); } else { // Bounce the file } } // Report any validation errors (via message bus or SMTP or some such). } And that's pretty much it. Most of the time I wrap all these operations in a "Worker" class that takes the needed interfaces as constructor parameters. This approach has worked reasonably well, but I just get this feeling in my gut that there's something awful about it and would love some feedback. Is writing an ETL process as a C# Console app a bad idea? I'm also wondering if there are some design patterns that would be useful in this scenario that I'm clearly overlooking. Thanks in advance!

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• any basic app packaging gui for a newbie?

  - by Hairo

  i've made an app using wxpython, i have some .py files and some icons, how can i package it for uploading it to launchpad?? i've already set a ppa and it seems like i need to organize my files before packaging, i mean the debian file structure needed to make a tar.gz source package and how to upload it... i've read some guides (that have an already made tar.gz source package) but as this is my first app i do not understand most of the things... any help?

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• Is there a Visual Studio style tool/IDE?

  - by Tim

  I have been developing in the windows space with Visual Studio for a while now with work, but I have also been using Ubuntu for a while and am keen to get into some software development for linux. I should also note. I am not looking for .NET and I am aware of mono. I am also familiar with c++ development and some python, so the language isn't so much relevant as the "all in one" aspect. I was interested to know if there is a useful all in one code/debug/design(gui) IDE similar to something like Visual Studio but for linux?

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• ODI 11g – Faster Files

  - by David Allan

  Deep in the trenches of ODI development I raised my head above the parapet to read a few odds and ends and then think why don’t they know this? Such as this article here – in the past customers (see forum) were told to use a staging route which has a big overhead for large files. This KM is an example of the great extensibility capabilities of ODI, its quite simple, just a new KM that; improves the out of the box experience – just build the mapping and the appropriate KM is used improves out of the box performance for file to file data movement. This improvement for out of the box handling for File to File data integration cases (from the 11.1.1.5.2 companion CD and on) dramatically speeds up the file integration handling. In the past I had seem some consultants write perl versions of the file to file integration case, now Oracle ships this KM to fill the gap. You can find the documentation for the IKM here. The KM uses pure java to perform the integration, using java.io classes to read and write the file in a pipe – it uses java threading in order to super-charge the file processing, and can process several source files at once when the datastore's resource name contains a wildcard. This is a big step for regular file processing on the way to super-charging big data files using Hadoop – the KM works with the lightweight agent and regular filesystems. So in my design below transforming a bunch of files, by default the IKM File to File (Java) knowledge module was assigned. I pointed the KM at my JDK (since the KM generates and compiles java), and I also increased the thread count to 2, to take advantage of my 2 processors. For my illustration I transformed (can also filter if desired) and moved about 1.3Gb with 2 threads in 140 seconds (with a single thread it took 220 seconds) - by no means was this on any super computer by the way. The great thing here is that it worked well out of the box from the design to the execution without any funky configuration, plus, and a big plus it was much faster than before, So if you are doing any file to file transformations, check it out!

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