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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2answers
732 views

How do I include basic image editing in my python application?

I am making an application for the Ubuntu App Showdown and I want to include basic image editing like adding black and white, grey effects etc to the image. But I don't know how to do that. I have ...
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1answer
3k views

Glade GTK entry get text

Sorry for a newbie question but I could not figure out how to print a text which a user enter in a GTKEntry field after he press a button. I design my app with glade, a simple TextEntry Field and a ...
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2answers
104 views

Can I develop an “existing” application for the showdown?

I want to develop an app for the new Ubuntu's contest, but I have two questions: Can I develop an "existing" app, which I added to Launchpad some days ago, but which no source code was uploaded? Can ...
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8answers
636 views

Can I make apps for ubuntu using a Windows PC?

I develop windows software . Does anyone know? how I can make application/software for *buntu using a windows pc?
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2answers
1k views

Python, Gtk3 and Gstreamer

This isn't a really happy combination, but it does work for the most of the time. However, I just bumped into a problem with Gio.File. This will always result in TypeError and Python segfaulting: ...
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2answers
207 views

What is the version numbering logic for open source developers managing software releases? [closed]

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 ...
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2answers
544 views

Can I develop ubuntu apps in Gambas

As this new platform is released where developers can publish there apps, I would like to know if Gambas applications are good enough to submit. Gambas is in my opinion the easiest way to develop ...
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1answer
80 views

copy-mangar having auto-poweroff after completing copying/moving operations?

Many Of my friends don't have Internet connection so often i download their stuffs. so sometime the files are too large 20~25 GB's . Which takes hours to copy :) For my convenient is there any way ...
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1answer
15k views

Can Ubuntu provide an IDE for C, C++ programming? [duplicate]

I am a beginner in the field of programming. I have tried to learn C and C++ on a Windows 7 computer using the Turbo C++ compiler, but faced frequent failures and finally my laptop's motherboard ...
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1answer
164 views

Interacting with appindicator icon and menus from LDTP

I'm using LDTP Python API in order to test desktop applications under Ubuntu (Unity shell, Ubuntu 12.04). I can't find if there's any available way to interact with appindicator icon and menus using ...
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1answer
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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1answer
923 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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2answers
304 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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1answer
750 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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2answers
65 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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1answer
193 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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1answer
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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2answers
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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2answers
1k 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
693 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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1answer
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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1answer
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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1answer
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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1answer
402 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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1answer
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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1answer
34 views

Does an application need root permissions if it modifies files in the “/” directory?

I'm creating a program for Ubuntu that involves creation of files within the folder where the code is present. What I want to know is: When a .deb package is installed, where do the contents go? If a ...
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1answer
124 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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1answer
45 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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1answer
42 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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1answer
84 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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1answer
48 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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1answer
437 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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3answers
72 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
866 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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1answer
75 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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1answer
356 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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1answer
209 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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1answer
271 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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2answers
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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1answer
376 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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1answer
96 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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1answer
95 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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1answer
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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1answer
235 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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1answer
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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2answers
430 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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2answers
242 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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1answer
157 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. ...