Questions tagged [application-development]

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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How to get GTK4 in Ubuntu 20.04?

GTK4 was released quite recently, and the demo codes don't run in Ubuntu 20.04 because GTK4 is not available on the system. Traceback (most recent call last): File "gtkapp.py", line 3, in &...
Archisman Panigrahi's user avatar
7 votes
1 answer
1k views

What are the design guidelines for appindicator icons?

I am creating a Unity AppIndicator using Python + PyGObject, but I wish for it's icon to be in standard Ubuntu style. Where can I find appropriate guidelines for using colours (or is it just white/...
Phlya's user avatar
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6 votes
1 answer
73 views

Assistive Technology for Hands Free Use

I'm looking for packages compatible with Ubuntu 20.04 LTS that facilitate using the computer without hands. Examples include: eye gaze tracking mouse software dictation software capable of coding ...
Chelsea's user avatar
  • 61
6 votes
1 answer
66 views

Ubuntu Touch HTML5 app Orientation lock

Can somebody tell me how can I fix my HTML 5 app into portrait mode only?
Speck84's user avatar
  • 61
5 votes
1 answer
2k views

How to use Arguments in QML without getting qmlscene arguments

I'm trying to write a QML application to be launched by qmlscene. I want this to accept arguments, so I'm using the Arguments object. However, this gets the arguments passed to qmlscene as well as ...
Robert Schroll's user avatar
4 votes
0 answers
1k views

Add an application to notification tray in GNOME

I am developing a Linux application and I want an icon for the application to show up in the notification tray which is at bottom-left in GNOME. Image of notification tray in GNOME: How can I ...
Prateek Agrawal's user avatar
4 votes
0 answers
57 views

What apparmor policy do I need in my click package for offline html5 application?

Hello all you knowledgeable people. I have created an ubuntu HTML5 application. A simple, offline application. You can browse it on github: https://github.com/BigET/ResistorCalculator In order for ...
E. Timotei's user avatar
4 votes
0 answers
139 views

Documentation / guides for offline ubuntu phone scopes

I've been working on an Ubuntu phone scope that is NOT connecting to the internet, it is retrieving local results. I am having difficulty, which is mostly due to not having a guide for how to write a ...
Randy_O's user avatar
  • 430
4 votes
1 answer
81 views

Ubuntu Apps Developer Team

I'm writing on behalf of getting answers for a few questions. I have a team and we have to develop apps for Ubuntu Software Centre. I am the team leader and I have two members and we are growing fast,...
Beniamin COSTEA's user avatar
4 votes
1 answer
82 views

Guidelines for packaging web app

For a while now, I'm trying to build an Ubuntu package for PPA upload, and facing all sort of issues understanding bzr dh-make and such. The package is web application (php-based). Most packaging ...
Corwin's user avatar
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4 votes
0 answers
1k views

QML app icon not effective when called from app.setWindowIcon()

I've a Qt5/QML hybrid app built with Ubuntu Touch SDK. I'm trying to set the app icon for it, but without success. Code looks like this: int main(int argc, char *argv[]) { QApplication app(argc, ...
Andrew Haigh's user avatar
4 votes
1 answer
2k views

How to get QML syntax highlighting in gedit?

QML files opened with gedit don't have syntax highlighting. Is there a package providing a gtksourceview lang.spec file for QML? If not, has anyone written a lang.spec than can be installed locally?
andrewsomething's user avatar
4 votes
1 answer
316 views

How to create and submit package for Qt application

I have an application that I developed in Qt and Ubuntu. Its primary target is Windows but I prefer working in Ubuntu for all sorts of obvious reasons, so I rebuild it using Qt under XP and create an ...
David Brown's user avatar
3 votes
0 answers
2k views

How to fix Android Studio installation and Gradle errors?

I have installed Android Studio with the idea of developing applications with Cordova and Phonegap thanks to the help of my partner @karel who showed me this question: How to install Android Studio on ...
Miguel Espeso's user avatar
3 votes
0 answers
1k views

Qt error trying to install quiteinsane gimp plugin

I am trying to install the quiteinsane gimp plugin on Ubuntu 16.04. https://sourceforge.net/projects/quiteinsane/ I am getting this error: checking for Qt... configure: error: Qt (>= Qt 2.2.2) (...
Seshadri Kumar's user avatar
3 votes
0 answers
97 views

How to create Ubuntu Applications

What should I use to create apps for the Ubuntu Software center? I have Ubuntu 16.04 and qtCreator keeps crashing for me (even 4.3.0). I can't find a good place to start for creating apps for the ...
j.doe's user avatar
  • 31
3 votes
0 answers
57 views

Ubuntu Component Showcase not working in 16.04

I'm working through this tutorial, but I'm unable to find the Component Showcase QML file using the provided path (/usr/lib/ubuntu-ui-toolkit/examples/ubuntu-ui-toolkit-gallery/ubuntu-ui-toolkit-...
pdoherty926's user avatar
3 votes
0 answers
135 views

How can i build an ubuntu touch app only in c++ (without qml) and with cmake

is there a way to configure a cmake file for building a click-package without qml. i like to start programming in the main function with QApplication and only my own window class. my goal is to write ...
Morcl174's user avatar
3 votes
0 answers
94 views

Simple Javascript Scope HowTo and Examples

I am trying to develop a simple Scope for Ubuntu Phone (BQ 4.5 particularly). The scope's task should be just to display (and refresh) one web page directly in the scope, i.e. not to open a separate "...
alef's user avatar
  • 106
3 votes
0 answers
535 views

Ubuntu Xenial: perf doesn't demangle C++ symbols

Linux perf-tools don't seem to work as expected on Ubuntu (16.04). C++ symbols don't get unmangled, I only see garbled stuff like "_afki34334ldfjkdasf_dfkj". Note that I have compiled the program and ...
Benjamin Maurer's user avatar
3 votes
0 answers
636 views

could not find or load the Qt platform plugin "xcb" in ubuntu-sdk

Command: $ ubuntu-html5-app-launcher --www=www Error: This application failed to start because it could not find or load the Qt platform plugin "xcb". Reinstalling the application may fix this ...
naan's user avatar
  • 63
3 votes
0 answers
104 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 ...
Ryan Corvidae's user avatar
3 votes
1 answer
396 views

AppArmor denial when trying to open file using content hub

When trying to open a file using content hub using C++ I get these errors: Opening with peer com.ubuntu.music_music_2.1.857 Sdk-Launcher> Application was resumed Sdk-Launcher> There has been a ...
meta221's user avatar
  • 325
3 votes
0 answers
220 views

Cannot launch app in Ubuntu Device

I have just installed the Ubuntu SDK on an Ubuntu 14.10 system (a virtual 32-bit install). I have also installed Ubuntu Touch on a 2013 Nexus 7. The device is seen by the host and the device is ...
Gurrumin's user avatar
3 votes
0 answers
81 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 ...
metakermit's user avatar
  • 2,630
3 votes
1 answer
445 views

Internationalization of QML application using i18n

Does someone know all the steps needed to have the apps translated in multiple languages? I am using in my QML files i18n.tr() , and such words I need to translate I performed below steps ( ~/...
user262898's user avatar
  • 2,031
3 votes
0 answers
183 views

FreshBooks Online Account

I'm developing an application that connects to FreshBook's API. I can either integrate the account authentication process within my application, or I can develop an Online Account that could be used ...
Jonah's user avatar
  • 563
3 votes
1 answer
430 views

Qt creator does not work correctly after installing ubuntu sdk

I installed qt-sdk before installing ubuntu-sdk on ubuntu 12.04. When the Develop, Examples, or Tutorials link on the welcome page is clicked it creates inactive windows and cannot close it normally. ...
user211381's user avatar
3 votes
0 answers
1k views

TypeError: Cannot call method 'hasOwnProperty' of null, while creating a QMLscene window

I am trying to make a simple Ubuntu Touch web application with Qt Creator. I have set up a new project according to the tutorial and committed the files to Bazaar. I have set a url instead of the ...
tomoqv's user avatar
  • 819
3 votes
1 answer
1k views

Receiving drag events in a WebView in a QML application

I'm working on an app using QML and the Ubuntu SDK. One of the Pages contains a WebView. While the WebView receives click events just fine, it doesn't receive drag events, as I would like it to. I ...
Robert Schroll's user avatar
3 votes
1 answer
460 views

Get sensor values Ubuntu Touch

I'm new to Ubuntu applications and I'm trying to make an application for Ubuntu Touch that reads the values from the sensors (Accelerometer, Gyroscope,...) but I don't know where to begin. Which ...
JoaoM's user avatar
  • 31
3 votes
1 answer
1k views

(QML) Scroll multiple listviews

Is possible to scroll multiple Listviews together in qml?? this was my attempt: Flickable { id: scoreflick anchors.top: namesrow.bottom anchors.left: ...
Hairo's user avatar
  • 327
3 votes
0 answers
694 views

Kinect + Webcam - Bandwidth issue

I am making an application on Ubuntu 12.04 and ROS Fuerte (Robot Operating System) using the Microsoft Kinect sensor and a logitech webcam. Both work perfectly fine independently. For information I ...
Morgan's user avatar
  • 31
3 votes
0 answers
791 views

How do I get high resolution icons in Unity for my application without a .desktop file?

I am trying to fix a problem I found with a Java application. It has a too low res icon. After reading the source of it I modified it to have a bigger icon. SWT uses the gtk_window_set_icon() function ...
Felix Möller's user avatar
3 votes
0 answers
360 views

Python Access Pidgin Data Structure by Dbus

I recentely started to program in Python and making a script/plugin for Pidgin,i need to access PurpleConversationUiOps and use the has_focus field,based in some examples in documentation of Pidgin i ...
Mr Alles's user avatar
  • 155
3 votes
0 answers
192 views

How to get Yelp to open the docs?

quickly tutorial Result: An empty Yelp window with the XML file opened in gedit. yelp /usr/share/quickly/templates/ubuntu-application/help/tutorial.xml --> Exactly the same problem. Worked fine a ...
RobinJ's user avatar
  • 8,910
3 votes
2 answers
1k views

Will it be possible to create apps/games in Java SE or Java ME on new Ubuntu phones?

Will it be possible to create apps/games in Java SE or Java ME on new Ubuntu phones?
Marcin's user avatar
  • 31
2 votes
0 answers
2k views

How do I resolve "X Error of failed request: GLXBadFBConfig" when installing iTunes using wine?

I installed wine in order to install iTunes. The iTunes icon is on the desktop but it won't open. with wine64 explorer I see iTunes.exe, however when clicking on it the following message in the ...
aleksandri's user avatar
2 votes
2 answers
283 views

Offline commandline Thesaurus?

Online command-line thesaurus? This here has answers for an Online thesaurus. I need an offline thesaurus for the commandline. If there is none, is there a library available in the repos containing ...
Anon's user avatar
  • 12.1k
2 votes
0 answers
64 views

Ubuntu kept old partitions after reinstallation. How can I reallocate the space?

I am new to Ubuntu and after failing to resolve some package management problems, I'm trying to reinstall it. I'm using Windows 7 and Ubuntu 16.04 (dual boot). Now after the attempted reinstallation ...
user716691's user avatar
2 votes
0 answers
184 views

Can I access network-manager.nmcli from another snap?

I need to be able to access network-manager.nmcli command from my snap. I have not found a way to accomplish this with the current core or network-manager interfaces. Is the only solution that a slot ...
Ryan Nuzzaci's user avatar
2 votes
0 answers
263 views

umake android proxy error

When I run in Ubuntu 16.10: $ umake android --accept-license ERROR: https://developer.android.com/sdk/index.html couldn't finish download: HTTPSConnectionPool(host='developer.android.com', port=443): ...
maormara's user avatar
2 votes
0 answers
228 views

Pyotherside for Ubuntu Touch Mendeley App

I am an owner of both the BQ M10 Ubuntu Tablet and the BQ Aquaris E4.5 Ubuntu Phone and I am very unhappy with the absence of a Mendeley app for these devices. For this reason, I want to code it ...
Sven's user avatar
  • 21
2 votes
0 answers
687 views

Ubuntu-SDK-IDE: QXcbConnection: Could not connect to display

In the case applications executed from the Ubuntu SDK IDE in a LXD container can not connect to the X Server, the X11 socket in /tmp/.X11-unix was probably deleted and the container can not access the ...
zbenjamin's user avatar
2 votes
1 answer
5k views

Problem installing snapd

I like to install snapd but my computer say message like this: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package snapd how ...
Jeko Paul's user avatar
2 votes
0 answers
65 views

I want to compile apps for Ubuntu-Touch. What are some good resources?

I have an Acquarius M10. I want to try to compile x11 apps for use on my tablet. I am especially thinking of things like xournal. What are some good resources for me to start learning about how to do ...
Jack's user avatar
  • 532
2 votes
0 answers
385 views

Build an Ionic application for ubuntu phone as click package

Hello fellows I have the following application: https://github.com/kawai-developers/faster And I try to build it as a scope for ubuntu phone I managed to add the platfrom for ubuntu with the ...
Dimitrios Desyllas's user avatar
2 votes
0 answers
62 views

Ubuntu phone - how to store data when writing HTML5 app - preferred way

I started creating a simple organizing app for myself, and hit a brick fairly quickly. Wanted to have an XML list of things that would be read and updated by a HTML form. Now I came through ...
Tegeravis's user avatar
2 votes
1 answer
2k views

What is the difference between libprotobuf-dev and lib-protobuf8

I want to install protobuf for my cpp project, I searched protobuf with apt-cache search protobuf and the result shows blow: libmirprotobuf-dev - Display server for Ubuntu - protocol definition ...
Liu Hao's user avatar
  • 379
2 votes
1 answer
107 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 ...
James Tait's user avatar

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