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.
1,918
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How to run home grown app as root
I have developed a GUI app that I sometimes want to run as root. In Ubuntu 18.04, I used sudo with no problems, but in 20.04, sudo will not run the app: with no error message. Also, if I run sudo su, ...
3
votes
4
answers
2k
views
Can I develop a 2D game with just QML?
I have a bit of interest in developing for Ubuntu Touch (I have little to no real coding experience also), but my main interest is trying to develop a 2D game.
From my understanding, I would either ...
- 223
0
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0
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282
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How can I install packages on another from USB? [duplicate]
Meaning: without running sudo apt-get install x. (where x is the name of the app).
In Windows I'd download the app (x.exe). Save it on the USB. Then install it from the USB on the computer I want to ...
- 115k
39
votes
2
answers
3k
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How to develop a System Indicator for Unity?
This is not a duplicate of How to create Unity indicators?. I'm looking for system indicator not application indicator.
Backgound:
From these two questions:
How do I add or manipulate Application/...
- 656
1
vote
1
answer
3k
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How to fix gunicorn.service: Failed to load environment files: Is a directory
When i run
sudo journalctl -u gunicorn
I get:
Oct 14 12:49:22 my-server-thing systemd[1]: gunicorn.service: Failed to load environment files: Is a directory
Oct 14 12:49:22 my-server-thing systemd[1]:...
- 48.1k
13
votes
1
answer
1k
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How can GIMP 2.8 have two different icons simultaneously?
In Unity dash GIMP 2.8.10 has a icon and uses a different one in launcher.
GIMP in Dash
GIMP in Launcher
I searched for GIMP in "File System" and got this.
How can this be done while packaging ...
- 360
1
vote
1
answer
977
views
not gtest folder in /usr/src/ folder
I am trying to install gtest in 18.04. I ran
sudo apt-get install libgtest-dev
but when I go in to the folder /usr/src/ there is not gtest or googletest folder.
According to this:
https://gist....
- 99.9k
1
vote
1
answer
415
views
How can I remove and purge EasyScreenCast from Ubuntu 20.04?
I typed sudo apt remove easyscreencast and I got the result:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ...
- 179
1
vote
0
answers
735
views
How to speed up dpkg-deb build
I use dpkg-deb to build a deb package. However, in my CI tests, dpkg-deb takes a lot of time to complete (~6min). Is there a way to speed up the process?
I have tried setting compression to none:
dpkg-...
- 113
0
votes
1
answer
44
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 ...
- 8,935
11
votes
1
answer
2k
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Error setting up pbuilder following Ubuntu Wiki. How to set it up?
I am setting up my machine for Ubuntu development. I am following Ubuntu Development Beginnings, but while running sudo pbuilder create command I am getting below error:
$ sudo pbuilder create
I: ...
- 28.5k
0
votes
1
answer
582
views
Issue with GPG keys while setting up a proot environment
I am trying to set up a chroot environment with pbuilder. I tried this but got the following issue.
$ sudo pbuilder create --distribution focal
W: /root/.pbuilderrc does not exist
I: Distribution is ...
- 28.5k
10
votes
4
answers
9k
views
How to add vte terminal widget in GTK3?
I'm trying to add vte widget in my application and the examples I've found use .fork_command() to execute a command in that widget.
But according to
http://developer.gnome.org/vte/0.26/VteTerminal....
- 151
0
votes
3
answers
3k
views
How can I install Android Studio? [duplicate]
I'm trying to install Android Studio but I found this error. Can someone help me?
If I write on terminal sudo apt-get install android-studio
Reading package lists... Done
Building dependency tree ...
- 1
2
votes
1
answer
1k
views
Targetting Boost 32-bit While on 64-bit ubuntu?
Well i have libboost-all-dev installed, but i am trying to compile for 32-bit. I can't install libboost-all-dev:i386 either.
g++ -lboost_filesystem main.cpp
g++ -m32 -lboost_filesystem main.cpp
The ...
- 234
0
votes
1
answer
36
views
dpkg: problems with creating packages
I use dpkg to create package and distribute my app. Please, look at the example of my 'DEBIAN/control' file:
Package: myapp
Version: 1.0.1
Section: base
Priority: optional
Architecture: amd64
Depends:...
- 88.1k
1
vote
1
answer
851
views
Is there a way to use setTimeout in Gnome Shell Extension code?
I am trying to code a gnome-shell extension. It uses Javascript. But one major problem when I want to use setTimeout() it tells me this in the log: ReferenceError: setTimeout is not defined, what I am ...
- 363
1
vote
1
answer
398
views
How to reduce tabs bar size?
Its too large and annoying, I tried gnome-tweaks but no options found.
- 88.1k
0
votes
2
answers
1k
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Get folder from file chooser button pygtk
i want to get the location of the folder that is selected by a filechooserbutton in pygtk... how can i do this?
i connect the current folder changed signal from filechooser but the signal is emitted ...
- 794
0
votes
1
answer
1k
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Create Application command in ubuntu
I have a script script.sh but I am very lazy if when running must open through the folder where the file and run it in the way ./script.sh,
How do I get my script to use keywords?
I have a script.sh ...
- 3,968
6
votes
2
answers
6k
views
No examples are shown in Welcome screen of qtcreator
So I installed qtcreator package on ubuntu 18.10.
I found out that to get the examples, I also needed the qtbase5-examples and the qtbase5-doc-html package.
But there are still no examples shown in ...
- 161
1
vote
1
answer
2k
views
Images not working with Glade?
I have this basic Quickly app set up and working fine. I have one image on the first form/view or whatever it is called. I have put the image file in the projectname/data/media/ folder as a png with ...
- 70.5k
3
votes
2
answers
2k
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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 ...
- 70.5k
2
votes
2
answers
5k
views
How do I show an animated gif in the app I am developing?
I am developing Discvur, a simple Imgur viewer, for the Ubuntu App Showdown. Therefore I use quickly + Glade + Gtk + Python. PyGObject instead of PyGtk would be highly appreciated.
I would like to ...
- 70.5k
0
votes
1
answer
778
views
Gtk.Image is not displayed
i am having a problem with a Gtk.Image. I use the set_from_file() function to add the image to the Gtk.Image but the image is not displayed! Instead the broken icon is.
The image exists and I can open ...
- 70.5k
1
vote
1
answer
41
views
Unknown policy-vendor error in snap package review
I am trying to package an application in snap format, but When I do
snap-review olam_0.1_amd64.snap
It shows this error
- security-snap-v2:policy-vendor
unknown policy-vendor 'ubuntu-core'
How ...
- 70.5k
1
vote
0
answers
57
views
Ubuntu user access rights for Jenkins
I have Two users on Ubuntu setup
user : kmb and user : dev
where user kmb has installation of Qt, Qt for webassembly and Jenkins server also
where as dev has nothing installed in it
so when i login to ...
2
votes
1
answer
331
views
Show an application in the "Select Application" dialog list [duplicate]
I've written a software that runs on Ubuntu.. (18.04 and 20.04 tested). I did not package it, since I'm using Arch linux as well, but wrote an installation script. It copies some files and generates a ...
- 347
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1
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256
views
How to apply Ubuntu 14.04's dock on Ubuntu 20.04 [duplicate]
there!
Hope everyone is doing fine.
I've recently upgraded my laptop, Ubuntu 14.04 LTS to Ubuntu 20.04 LTS, but I do miss the wonderful dock the former does have. I mean, scrolling on the dock I could ...
- 88.1k
3
votes
3
answers
2k
views
Get unique device ID in QML
I need to get a unique ID for the device. I originally thought I'd use the device's imei, but that doesn't seem to return anything:
import QtSystemInfo 5.0
DeviceInfo {
id: device
}
Component....
- 6,303
6
votes
3
answers
23k
views
How to install figma or sketch in Ubuntu?
I'm following a tutorial in which they worked with sketch (only available on Mac), a program to package and mount applications, for example in React.
I searched for information and saw that figma can ...
- 108k
43
votes
4
answers
77k
views
Can I write programs in C# on Ubuntu?
I am forced to learn and practice C#, is there any applications that support and can be used to write programs in C#?
- 7,579
-1
votes
1
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77
views
I want to create application for linux system and i want to know how to modify open source application like vestacp webmin [duplicate]
I am a very beginner in linux development..plz explain what i want to learn to build linux application or develop or modify open source application
- 21
3
votes
2
answers
200
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What's up with Ubuntu Desktop API docs? Why are all the AppIndicator links dead?
I was going to make a quick tray monitoring script. Y'know, the classic CPU/mem/net usage example; I need a similar thing, but with my own code.
15 minutes later, trying to find any doc whatsoever ...
- 11
4
votes
1
answer
1k
views
ERROR: The checksum of android-studio-ide doesn't match. Corrupted download? Aborting
More than three times:
thufir@dur:~$
thufir@dur:~$ cat android
Script started on 2017-10-26 05:49:38-0700
thufir@dur:~$
thufir@dur:~$ umake -v android android-studio --accept-license
INFO: Logging ...
- 4,773
2
votes
1
answer
33k
views
Installing Qt 5.x on Ubuntu globally
Hello everyone! :)
I need to install Qt 5 globally on Ubuntu to be able to use QML libraries like Kirigami. However, the wast majority of Google search results tell how to install it locally (as a ...
- 101
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8
answers
17k
views
0
votes
0
answers
55
views
What is the status of Ubuntu Quickly? Is it still developed?
I'm trying to look into Ubuntu Quickly, but the information seems really outdated, 2010. Is the project still on? What is the official page I can download it from?
Is there a similar tool in .deb ...
1
vote
0
answers
93
views
Is there any software for using mobile device as an air mouse for Ubuntu?
I just want to know if there is any software available as an air mouse(by air mouse I mean which you hover in air to move the cursor using the IR blaster in the phone). Is there is any development ...
12
votes
2
answers
7k
views
How do I add a system-wide menu item to the Applications menu?
I have manually installed a software to /opt and I wanted to add it to the Applications menu.
Although Ubuntu makes it dead easy to add it to my user's menu, how do I add it system wide, so that all ...
- 3,931
2
votes
1
answer
1k
views
How can I associate a custom file type with a custom executable?
I have a custom file type, made a custom MIME type for it, associated an icon with it. Now I want to open it with my custom executable. If I click OpenI get a dialogue Could not display ... There is ...
- 1,707
6
votes
2
answers
8k
views
How to create charts in QML?
I'd like to add to my application a page with not only raw figures but also eye friendly charts to display data.
Is there a native component or a third-party plugin I could use to create such ...
- 121
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votes
0
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86
views
Can't install Quickly on Ubuntu 18.04
I'dd like to learn linux development so I tried to install Quickly.
Followed instructions from this page 'https://wiki.ubuntu.com/Quickly#Installation", but my system says "Unable to locate package ...
- 9
0
votes
1
answer
367
views
GUI for Kaldi ASR
I'm a graduating student. Our group's thesis is about ASR. In less than a week, we're going to defend it. We've already produced a model for our ASR which we run on Linux. Our problem is we need a ...
- 11.4k
3
votes
2
answers
2k
views
How do you reorder widgets in Glade?
How can I reorder widgets in the Glade widget tree?
For example, assume I have a Glade application that contains this partial tree:
box1 (GtkBox)
|--button1 (GtkButton)
|--button2 (GtkButton)
|--...
- 131
21
votes
3
answers
14k
views
How can I install commonly used developer tools?
Is there a meta-package for installing commonly used developer tools such as cmake, autoconf, g++, etc.? The intent is to have roughly the same range of command-line tools as one has after installing ...
- 1
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0
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231
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How to make a lockscreen for xfce using qml without sddm lockscreen
I was trying to make a lock screen for Xfce and gnome using QML and python PyQt5.
main.qml
import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Window 2.12
import QtGraphicalEffects 1.0
...
34
votes
3
answers
53k
views
Installing gtk development environment
Not new to Ubuntu or programming but I am new to programming in C and gtk. Have been using Quickly for the odd program. I want to play around with C and gtk.
What gtk packages do I need to install to ...
11
votes
4
answers
15k
views
How to detect a computer's physical screen size in GTK
I've come across this bug while writing my app. In short, the app's window size is fixed, which does not work well with smaller screens such as in netbooks.
In those, the lower buttons are off the ...
- 1,400
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votes
1
answer
135
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develop or contribute to ubuntu community
I'm a newbie to Ubuntu development. I have developed many apps for Windows. My college and school uses only Windows. So, I'm very familiar with developing in Windows. But, when I wanted to switch over ...
- 32.3k