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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3
votes
4answers
834 views

Setting up a build system for Python app

In trying to sort out this issue, I have run into the following problem. I have a Python script that gets installed to /usr/lib/. But I need to get this script into a build system so that I can get ...
1
vote
0answers
28 views

How can I create a chromium-like background app?

I want to create an application that (like chromium) creates an icon on the top menu bar and after you close the application, the icon is still there and the application continues running in the ...
0
votes
0answers
25 views

How to create application from bash file? [duplicate]

I have bash file, it's about resizing pictures and adding color borders to each picture..it runs in ubuntu 15.04 well..it works on imagemagick..I wanted to make it as application like ubuntu ...
11
votes
5answers
2k views

Why do most GNOME developers prefer Python over Java for GTK+ programming? [closed]

I only know C and Java. And I really don't want to learn another language when I can work with what I already know. I haven't ever written a GTK+ application, but I am planning to start with an ...
0
votes
0answers
24 views

Ubuntu SDK AppArmor issues with opening CSS/JS files from filesystem

I'm trying to create a new app using HTML5/JavaScript with Ubuntu SDK and my new Ubuntu Touch phone. I've managed to run it on my phone, but it doesn't load any styling information and without ...
0
votes
1answer
208 views

How to access local music files/directory with HTML5 Ubuntu App?

I'm building an Ubuntu app in HTML5, using the Ubuntu SDK. From what I can tell, I should be using contentHub to access music files in /home/Music/, however I can't make heads or tails of the API. (...
0
votes
0answers
22 views

Ubuntu snappy software update cycle

I want to use Ubuntu snappy for our project which is basically secure update the application. In the Ubuntu IoT I found that it has the feature of secure FOTA. The basic idea is- we run snappy on our ...
0
votes
1answer
22 views

.cpp and .h files of new classes are not showing in Ubuntu SDK tree

I've added new classes to my project via Ctrl-N >> C++ >> C++ Class. However, after the files are added to my models/my-project folder, it does not show up on the tree in Ubuntu SDK. Why is this? ...
2
votes
0answers
79 views

How to publish Unity Game Engine app (executable binary) to Ubuntu Store?

Quite recently Unity Game Engine (not to be confused with Ubuntu's Unity user interface) added an option to create a linux build. The result is a set of two executable binary files .x86 and .x86-64, ...
0
votes
1answer
90 views

How to write a C++ backend for Ubuntu Touch that can access internet?

Is there anyway to write a C++ backend for an Ubuntu Touch application that can access the internet, and download files? Or do I have to do that through QML, and pass it to objects written in C++?
0
votes
0answers
35 views

Is there a reasonable chance of making money on an Ubuntu desktop utility application?

I recently asked this question on Quora. Unfortunately I didn't get much of a reply, so I thought of asking here... Hopefully this question is not off topic, but I want to know if any others here ...
1
vote
1answer
70 views

QML dynamic scoping not working (ReferenceError)

I am trying to reproduce the example here where the TitlePage.qml component creates two TitleText instances even though the TitleText type is in a separate file (under Section: Component Instance ...
5
votes
2answers
9k views

Adding icon to the system tray (notification area) [duplicate]

Possible Duplicate: How to program a status icon that will display in Ubuntu 11.04 as well as in other distributions? Hello, I have a small audio recording application programmed with GTK/GDK. ...
2
votes
1answer
6k 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 ...
3
votes
0answers
54 views

Ubuntu keyboard shortcut guidelines?

Is there an authoritative specification of keyboard shortcut guidelines for Ubuntu? I am looking for something like the OS X guidelines that result in unified application behaviour for common things ...
2
votes
1answer
202 views

Where should I save temporary files of the app I am developing?

I am developing an app for the Ubuntu App Showdown 2012, say "myapp". It needs to download files from the web, store them temporarily and then read them. Where should I save those files ? Now I do it ...
1
vote
0answers
40 views

Shared libraries in phone apps

I am trying to port this (https://github.com/jobe-m/ownkeepass) keepass app to Ubuntu Phone. I am just at the beginning an want to include the needed libraries and plugins. I didn't write a UI yet. ...
1
vote
1answer
21 views

Documentation for GNOME application code?

I want to get involved in GNOME development, however I have one problem, there is such a large amount of code in every package, and so many files and variables that it's really hard to find bugs ...
17
votes
2answers
9k views

How to read dbus-monitor output?

I'm playing around with dbus-monitor to try and understand how dbus is working in Ubuntu environment. I have several questions in this regard: Could you please let me know how to read the following ...
1
vote
1answer
38 views

Ubuntu SDK SortFilterModel with variables

I'm developing an app for Ubuntu Touch. I have a large list of items in an xml file and access it using the XmlListModel. I would like to offer some filtering on the list (as it is very large). Is it ...
0
votes
1answer
168 views

How do I see examples on the ubuntu-sdk?

The Ubuntu developer website says: For a presentation of Ubuntu HTML5 widgets, check out the HTML5 Gallery App (installed by the ubuntu-html5-ui-toolkit-examples package). You can launch the ...
2
votes
1answer
27 views

Deleting a application draft

I accidentally started submitting a click application when I meant to submit a desktop application is there a good way to delete it in the draft state? I searched around the "Manage" menu and I tried ...
0
votes
1answer
26 views

U1db-Qt not working as expected in ListView (Ubuntu Touch App Development)

Recently, I've been trying to learn how to use the U1db Library (if that's what you call it), but it hasn't been working the way I expected it to work. Here is my code: import QtQuick 2.4 import ...
0
votes
1answer
37 views

ubuntu phone textfield displayed different

I am trying to build a QML application for Ubuntu phone. My form looks ok on screen (desktop), but when I put the app on the phone, the display is off. The borders around my test fields are not ...
0
votes
0answers
22 views

No ubuntu web app inspector

Been using Ubuntu 14.04 LTS release to do some development webapps and the web inspector was there as default. When installing ubuntu sdk on 15.04 and 15.10 there's no web inspector. How can i get it ...
0
votes
1answer
23 views

Automated review failure from store - online_accounts

I'm trying to upload a package to the Ubuntu Software Store that uses Online Accounts. However, it keeps failing automated review with errors like: No JSON object could be decoded. Value: "ERROR: ...
3
votes
1answer
189 views

How to create local repository for Ubuntu Snappy

How to create local repository for Ubuntu Snappy? For example I use reprepro to create Ubuntu repository for deb packages.
1
vote
0answers
73 views

Can I get access to Ubuntu apps on Ubuntu touch if I allow read write access?

Okay so I'm an impatient bastard who realises he should have waited but purchased the BQ HD5 Ubuntu mobile phone back in June whilst being fully aware it didn't have that many apps available as was ...
2
votes
1answer
53 views

Curious how a server works

I am currently a high school student who has developed a few iPhone apps that have connected to Parse.com, so I have a little idea of how a... "server" (pre-made) works. But, I do know that's not how ...
1
vote
1answer
68 views

“Desktop file does not exist” error when using qmake based template in Ubuntu SDK

Just as the LaunchPad bug says: https://bugs.launchpad.net/ubuntu/+source/qtcreator-plugin-ubuntu/+bug/1512094 Using the Ubuntu SDK template "QML App with C++ plugin (qmake)" or any other qmake ...
0
votes
0answers
37 views

How to deploy mediascanner to Ubuntu Touch device?

I want to deploy mediascanner https://code.launchpad.net/~ubuntu-branches/ubuntu/vivid/unity-scope-mediascanner/vivid to Ubuntu Touch phone device. I can compile it via cmake and make in SDK etc, but ...
0
votes
0answers
71 views

What are the main advantages / disadvantages considering Ubuntu SKD and NW.JS for HTML5 Desktop App development?

Besides the obvious facts that NW.JS apps could be build for other operation systems than Ubuntu only and Ubuntu SDK can serve for other programming languages than HTML5 and JavaScript, what else are ...
1
vote
1answer
92 views

Download .click package

I've had some problem with my computer and, sadly, I lost all .click packages I've developed. I would like to download them but I don't know how. In myapps page on ubuntu.com ( https://myapps....
6
votes
1answer
1k views

module verification failed signature and/or required key missing

I am working on a kernel module, which is working fine. However, looking through dmesg, I see a message regarding my module that module verification has failed (module verification failed signature ...
0
votes
1answer
17 views

What does lint_package_filename_arch_valid mean?

In a review of my .click package, a warning contained the message: lint_package_filename_arch_valid What do I need to do to fix this?
1
vote
1answer
29 views

What does security_policy_version_matches_framework mean?

When uploading my click app to the store, I get an error in the automated review feedback: 1.2 != 1.3 (ubuntu-sdk-15.04) security_policy_version_matches_framework What does this mean, and how do I ...
1
vote
0answers
59 views

Ubuntu SDK Error --

When I go to make a Kit after the SDK wizard loads, I am presented with this error, and if I proceed I see it again while attempting to created a device emulator. Error creating textual ...
0
votes
0answers
27 views

TEE / TrustZone Andoird Phone

I was wondering if TrustZone is enabled on the Cortex A7 ARM processor on the Aquaris E4.5. Would like to purchase one for developing Trustlets/Trusted Apps and experiment with them. Any response is ...
0
votes
1answer
42 views

Can I run the Ubuntu SDK for Windows?

The last question on this was 2 years ago, so I'm hoping that things have changed... I spend a lot of time in college, and use the Windows PCs there. I would really like to begin development for ...
1
vote
0answers
98 views

ubuntu-sdk mkspec

I followed instructions in Ubuntu SDK to install the IDE. No problem. I can write an app and run it in the desktop, but not in my Ubuntu BQ 4.5. The kit is wrong and several errors appear: "Mkspec not ...
0
votes
1answer
22 views

What does lint_package_filename_format mean?

In a review of a .click package of my app, a message contained the following: lint_package_filename_format How can I fix it?
2
votes
1answer
130 views

Pure Qt application (QML/QtQuick) on Ubuntu Phone?

I have a Qt application that is based on QML/QtQuick and runs, among other platforms, on Android. Is it possible to compile this application without (major) modifications for Ubuntu phone? If yes, how?...
2
votes
1answer
325 views

Python app crash after sending command “GPIO.setup( 7, GPIO.OUT)”?

Python app crash after sending command "GPIO.setup( 7, GPIO.OUT)" !!! Action step: pi@rp:~$ python3 Python 3.4.3 (default, Mar 26 2015, 23:09:09) [GCC 4.9.2] on linux Type "help", "copyright", "...
22
votes
3answers
18k views
2
votes
1answer
75 views

Ubuntu touch click package

I have just publish my first app on Ubuntu touch. It is called "Food additives". Application can be install through ubuntu app store, but there is an one problem. After app installation, you can see ...
0
votes
0answers
37 views

Are there any open source projects From which it is eary to learn Ubuntu Desktop Application Development?

I have been contributing in this forum through asking and answering questions, but now I want to contribute in Open Source Projects by coding. But I have no idea which are the suitable platforms and ...
1
vote
1answer
90 views

ubuntu14.04: opengl for qt development

since a half day i try to get qt-creator to compile ... but i get errors. This is the output i get, when i start to compile a standard graphical project of the qt-creator (just created this empty ...
-1
votes
1answer
141 views

How to save variables for all pages in qml?

I am currently working on a game for Ubuntu touch. It is as good as finished, but one thing does not work: I have multiple pages using PageStack and want to have some variables which i can reach, ...
1
vote
1answer
659 views

REMOVE GNS3 1.3.9

This version keeps giving this error message " Can't connect to server http://127.0.0.1:8002 Even when I change the port number. I am wondering how can I uninstall it since I compiled using ...
0
votes
3answers
509 views

Ubuntu Text Ticker (Scrolling text)

Is there any application to display scrolling text on top of all windows in Ubuntu? Something like Tickr, but what I want is an application that can display my own text, something like appname "my ...