Writing applications for Ubuntu (including Ubuntu Touch) and questions about the application submission process to the Ubuntu Software Center. This covers both open source and commercial applications.

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4k views

Modification of stack size by ulimit -s

When I type ulimit -s in terminal it shows 8192. Does it mean that in my C code I could only have local variable of 8192 bytes? I am confused which stack size. Does ulimit -s change when we modify ...
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849 views

Is Ubuntu Phone OS going to include tools for development within the mobile platform?

I saw examples od native QML and HTML5 applications ,but Ubuntu is not Linux if one can't develop on it LOCALLY. Will Ubuntu Phone contain gcc, qmake, a python shell or similar tools?
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285 views

I am getting an error while writing my first app as shown in developer get-started tutorial

I am trying to learn to develop apps in ubuntu and currently i am going through this tutorial. As shown in the video I am writing the below given codes: self.refreshbutton = ...
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707 views

Building failed because of “Package x11 not found”

I am trying to build an application I am making into launchpad for my PPA, and, while it builds the DEB just fine locally, it fails in launchpad. The build log complains that Project ERROR: Package ...
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62 views

How to display a “What's new” dialog on every new version of my app

I'd like to be able to present a dialog that runs at the start of my application and shows the new features this new version implements. This dialog should only run once, and not be showed again ...
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192 views

Does Ubuntu One's CouchDB still work?

I heard that Canonical was about to drop CouchDB from Ubuntu One, but there still few applications which relies on that: https://wiki.ubuntu.com/UbuntuOne/ThirdPartyProjects I tried the Stipple, but ...
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90 views

Ubuntu App Submission won't allow the “free” bubble to be checked

I am at the final stages of the Ubuntu App Developer Showdown, and I'm right at the point where I am submitting my app. The problem I run in to however, is that even though buy is at $0.00, it will ...
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198 views

Why does “quickly share --ppa share” abort with a “can't create” error?

I can not figure out what I am doing wrong. The package builds ok with quickly package, I could submit it, but I can not update my ppa. Here is what I got: desgua@desguai7:~/quickly/sbk$ quickly ...
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996 views

How do I force only one instance of my application?

I am developing a program using quickly. I am using an indicator which can hide/show the main window. But when I launch the application from the launcher it starts a new instance of that application ...
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3answers
671 views

Which framework/toolkit for modern unity applications?

I want to code some applications for ubuntu (no other platforms), but which gui-toolkit would be the "official" one... in the past (gnome) gtk+ was my choice, but afaik unity uses Nux. I don't want to ...
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66 views

Is a port of an existing program eligible for the App Showdown?

For example, the original program is Xlib based, and I port it to GTK3. What about porting my old gtk2-based app to gtk3? Are either of these two eligible for entrance into the App Showdown?
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63 views

Are we allowed to distribute our App Showdown entries prior to submission?

Are we allowed to distribute our App Showdown entries prior to submission for testing and feedback purposes, or is the submission supposed to be the first people see of them?
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83 views

Can I participate in showdown contest with friend?

Can I write an application, together with my friend? If I develop application with my friend, can I get T-shirt for me and my friend?
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3answers
1k views

VB alternative/equivalent for development of Windows apps in Ubuntu

I want to develop a simple form for an Invoice for the user to use on Windows. I learnt how to do it using Visual basic in Windows. It's the simplest way to make a GUI for Windows I suppose. I am ...
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394 views

Desktop file for my python gtk3 app does not load the app

I am creating an GTK3 python application for Ubuntu. At the moment the application installs in the following locations. In /opt/NSTrain folder where NSTrain is the name of my application. The NSTrain ...
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88 views

Why is quickly ignoring the setup.py file in my project directory?

Whenever I try to package my application with quickly, the following error pops up in my terminal: And the package is in the directory. Whoop de doo. Then, when I go to open the .deb file in ...
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2answers
2k views

boost 1.48 and default (1.46) on Precise Pangolin12.04

The Precise release of ubuntu has two libboost-dev packages. The default is 1.46, but there is also a 1.48. If I install both, where are the headers and libraries for 1.48 installed? Are the ...
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89 views

QML app with C++ plugin (cmake) subdirectory

I am developing an Ubuntu Phone application "QML app with C++ plugin (cmake)" but I have so many qml files so I want to separate them by functionality ApplicationName CMakeListes.txt .. app ...
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40 views

How do you branch a single file from a multi-file project in bazaar?

How do you branch a single file from a multi-file project in bazaar? For example: lp:ubuntu-popey-app has two files; foo.h and bar.h I would do something like this: bzr branch lp:ubuntu-popey-app ...
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37 views

How can I take a textbox text entry and make it a variable?

I am having trouble with Python and would like to have some help. I am making a apt GUI 'front-end' with a nice UI. def on_textbox_changed(self): self.instvar = ...
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82 views

Should we be upgrading away from ubuntu.components 0.1?

Should we be upgrading away from ubuntu.components 0.1 in our ubuntu applications? I am working on one of the core apps, and many were unsure as to whether the current library (1.1 I think) offers ...
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47 views

Pair Programming in Ubuntu SDK?

How do you do collaborative code editing, aka pair programming, in the Ubuntu SDK? I heard you can do this in Vim, and I wonder if the Vim functionality in QtCreator makes this possible.
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317 views

Read lines from a text file in QML Qt/Quick

I need open a text file and read it's contents line by line and store each lines in a string list in qt quick 2.2. Can every one help me?
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69 views

Click package validator is missing from Ubuntu SDK!

I can't see an option to validate click packages in ubuntu-sdk. Am I missing something? I'm on Ubuntu 14.04 ubuntu-sdk version : 1.126 qtcreator-plugin-ubuntu version : ...
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2answers
544 views

Right package for JSON-GLib development headers

During configuration of one project, I got the error: checking for JSON... no no configure: error: You must have JSON-GLib >= 0.14.0 development headers installed to build. make: *** ...
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73 views

Ubuntu SDK: Error with First App

I am just starting to develop with the ubuntu sdk. I created a default html5 project, and I havent changed anything. This is the error: Starting ubuntu-html5-app-launcher ...
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319 views

“sudoing” strategy for python script on ubuntu

I'm creating a small router program (GTK frontend) in python for some of our less CLI savvy users. I've developed the glade front-end and able to connect the various signals. Now, I'm facing only one ...
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191 views

How can I create Unity dash integration for my Python script?

I have written an awesome script in Python and I seriously think it should help many rookie Ubuntu users out there -- especially for a quick solution/tip. My script searches through AskUbuntu.com and ...
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257 views

Ubuntu Software Center application extension

I want to make an application for Ubuntu Software Center. So I wanted to know the type of files that can be packaged into the bundle. Also wanted to know what languages are the applications published ...
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1k views

How to read file contents in QML

My app require reading contents from a file. Can you do it using QML alone? Or should I use C++ for it ?
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344 views

How do I install and reference QtLocation 5.0?

I am trying to run a sample application in Qt Creator which has an import QtLocation 5.0 statement at the top. I have already installed the Ubuntu SDK. I searched the software center for ...
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95 views

Ubuntu App Development for Desktop

I wish to start App Development in Ubuntu for Desktop. However, in the website for Ubuntu Development, i find information related only to phone development. The Ubuntu SDK - can it be used for desktop ...
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91 views

Which version of Python is used on Quickly?

I'd like to know the Python version used on Quickly. I could not find the version on the Wiki.
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2k views

Which scopes are available in the default Ubuntu installation?

After I've installed Ubuntu, which scopes are readily available to return results from the Dash?
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224 views

Will Ubuntu QML apps be cross-platform?

I am creating a voice-chat app for Ubuntu using the Ubuntu SDK; will it work on windows and mac in the future? If not, I will be switching from using the SDK to plain Qt or GTK.
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114 views

What application will give me a calendar with a year view?

Most applications have month or week or agenda view but I'm looking for something that can give me a one year spread. TIA
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395 views

Connecting QML with C instead of C++?

I've been working on an app in Ubuntu, using C and GTK, I want to switch from GTK to QML, however I can not find anywhere on the internet info on linking QML to C functions, just C++. Is it even ...
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202 views

How to package an application icon properly?

There is an blog article on ubuntu developer blog. http://developer.ubuntu.com/2012/02/how-to-prepare-a-compiled-application-for-ubuntu-software-center/ I followed all steps exactly. But the ...
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150 views

“quickly tutorial ubuntu-application” not working

I installed Quickly with sudo apt-get install quickly. If I want to read the tutorial with quickly tutorial ubuntu-application I get the following error message: FEHLER: No tutorial command found. ...
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169 views

How to install Ubuntu QML Toolkit on 10.04

It is exactly what the title says. I am trying to follow the instructions on the main portion of ubuntu's app developer page, but something is not working for me. Is it because it is not supported ...
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334 views

Is there a auto-complete tag like control for quickly/pygtk?

I am making a todo like application with indicator support using glade/python/pygtk/glade. I am making a form to save a Todo item. Each todo will belong to 0 or more projects. When a user enters a ...
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218 views

How to run an action when clicking on an appindicator

I'm looking at writing a simple app indicator and I need it to update it's information whenever it's clicked on to open the menu. Is there any kind of on_click action thing? Let me rephrase it then: ...
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953 views

How do I change GTK theme of my app in run time?

I recently noticed that monodevelop, can change GTK theme in runtime . How do I add it in my quickly app?
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2k views

Cannot run program - 'org.gnome.desktop.interface' is not installed

I am trying to make a python app that basically views a web page with QUICKLY on Ubuntu 12.04. When I do sudo quickly run in terminal, I always get this error: (saikoroubuntu:5283): GLib-GIO-ERROR ...
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2answers
1k views

Multi-threading in application designed in quickly

I have a tree which I populate with a file list from my computer on the click of a button. While the program is populating the tree the whole GUI hangs. Is there a way to populate the tree in another ...
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288 views

Could a KDE plasma widget be converted into its own app (easily)?

I've recently made the switch from KDE to Unity and I'm really missing one feature: the FolderView Plasma widget (Plasmoid?) I know there's a screenlet called Folderview which can be used under ...
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212 views

What is the schema XML file in the data/glib-2.0 folder of my Quickly application?

I created an Ubuntu application with Quickly, and I can see an XML file in the folder data/glib-2.0 of my project root and I am not exactly sure what this is for. The XML looks like this: <?xml ...
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2answers
120 views

Translating quickly application

I created an application using quickly create ubuntu-application myapp. Then I created translations and created deb package quickly package to install and test it. When I run myapp all strings from ...
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332 views

local .desktop files

I need suggestions. Currently fogger creates .desktop files for fogapps and puts them in ~/.local/share/applications so that they can be launched from dash or legacy app menus. Everything works as ...
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184 views

Quickly message box

How to make message like this using Quickly