Articles by Author


What's new in Qt 5: QStandardPaths

Friday, April 12, 2013 - 07:48  •  By ICS  • 

Qt 5.0.0 introduced the QStandardPaths class. This expands on functionality that was in Qt 4 in the QDesktopServices class. The QStandardPaths class provides methods for accessing standard paths on a system such as the location of the user's desktop directory or location of a program executable. The class provides only static methods, so it never needs to be instantiated as an object. I wrote a small Qt-based graphical application that illustrates many of the features of the class. A screen shot is shown below.

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Multiple Inheritance in Qt

Friday, April 12, 2013 - 07:45  •  By ICS  • 

Introduction A quick trivia quiz: Does Qt use multiple inheritance? If so, how many public Qt classes use it? Does any Qt class directly inherit from more than two classes? Does Qt let you multiply inherit (directly or indirectly) from QObject? If you can correctly answer these questions off the top of your head you're definitely a Qt and C++ guru and can stop reading now. If not, then by the end of this article you will be able to answer these questions and impress your colleagues with your knowledge.

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Marketing Push

Wednesday, January 30, 2013 - 12:34  •  By ICS  •  Qt, PhoneGap, Raspberry Pi

This week we did some marketing to promote the project. All of this effort stimulated some good discussion on the blogs and callback developer mailing list.

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New Qt 5 / WebKit 2 WebView APIs

Wednesday, January 30, 2013 - 12:34  •  By ICS  •  Qt, PhoneGap

There was no blog posting last week because I was away for some vacation in a warm place. This week work continued implementing the APIs for Accelerometer and Notification and using the Qt Simulator for testing.

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Repos Moving

Wednesday, January 30, 2013 - 12:33  •  By ICS  •  Qt, Cordova, Raspberry Pi, PhoneGap

This week we finished implementing some Cordova APIs (at least for the Qt 4 version). Compass and Accelerometer are done and some of Events was implemented. Notification is done as is most of File support and we are starting work on Contacts and Camera. Note that I am going to start consistently using the name Cordova rather than Callback orPhoneGap for this project.

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Corinthian Leather

Wednesday, January 30, 2013 - 12:32  •  By ICS  •  Qt, Cordova, PhoneGap

This week we switched to the new repository. Some pull requests from the old repository had to be resubmitted. Changes were committed for :

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Move to QML

Wednesday, January 30, 2013 - 12:32  •  By ICS  •  Qt, QML, Raspberry Pi, Cordova

Since the last posting we properly set up deployment of Cordova Qt for MeeGo Harmattan (e.g. the Nokia N9 phone). We also got Qt 5 packages including WebKit built for MeeGo Harmattan and tested it on a Nokia N9. Incidently, a big PR1.2 software update rolled out this week for MeeGo Harmattan phones.

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Odds 'n Ends

Wednesday, January 30, 2013 - 12:31  •  By ICS  •  Qt, PhoneGap, Raspberry Pi, Cordova

Throughout this project one thing that has been constantly changing has been the source code repositories, both due to several project names changes and with the move to being run as an Apache project.

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Qt 5 alpha release is imminent!

Wednesday, January 30, 2013 - 12:31  •  By ICS  •  Qt, Mobile, Cordova

In the past week or so we commited some more code for Contacts and Notification. Camera support has been submitted as a pull request. We are doing some testing on Symbian with a Nokia E7 phone  as we haven't done much testing on Symbian up to now.

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Qt 5 Alpha Out, Raspberry Pi Shipping

Wednesday, January 30, 2013 - 12:30  •  By ICS  •  Qt, Raspberry Pi, Cordova

Work has been slowing down somewhat as Qt 5 has been firming up for release. The Qt 5 alpha came out on April 3rd and we tested our code with it. Work is moving ahead for a Qt 5 beta release and then the 5.0.0 final this summer.

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Testing Continues

Wednesday, January 30, 2013 - 12:29  •  By ICS  •  Qt, Cordova, Raspberry Pi

We've recently been running the Cordova tests and making some fixes to get them to run better. 

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What's New in Qt 5: The QTemporaryDir Class

Wednesday, January 30, 2013 - 10:58  •  By ICS  • 

One sometimes needs to store information in a temporary location. POSIX compliant platforms like Linux provide the tmpfile() library function to create a unique temporary file that is automatically deleted when it is closed or the program terminates. Qt provides an abstraction of this with the QTemporaryFile class.

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Please, may I have another slice of Raspberry Pi...

Thursday, January 3, 2013 - 13:56  •  By ICS  •  Raspberry Pi, Embedded

About three weeks ago, Nokia arranged for ICS to gain access to the Raspberry Pi board so that we could help with an exploratory open source effort to get Qt working on this platform. That is how I got my chance to hack some code for this amazing board. The idea was to get a bleeding edge version of Qt 5 to run and to experience first hand hardware accelerated QSceneGraph based QML. And indeed bleeding edge it is - but also blazing fast. Now, first things first:

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Qt Dev Days Munich Recap

Thursday, January 3, 2013 - 13:55  •  By ICS  •  Raspberry Pi

Good talking to you all at Qt Dev Days Munich. We'll be at Dev Days in San Francisco beginning Nov 29 - hope to see you there!

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Qt 5 + Raspberry Pi Demo

Thursday, January 3, 2013 - 13:54  •  By ICS  •  Raspberry Pi, Embedded

Here's a video of my colleague, Roland Krause, demonstrating Qt 5 + Raspberry Pi at Qt Dev Days in Munich. Stop by our booth in San Francisco next week to see it first hand...and for your chance to win one of your very own!

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Raspberry Pi Giveaway from ICS at Qt Dev Days

Thursday, January 3, 2013 - 13:53  •  By ICS  •  Raspberry Pi

Be sure to stop by the ICS stand at Qt Developer Days this week for a chance to win a Raspberry Pi. We'll be giving away 50 boards over the course of the conference!

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70+ Raspberry Pi boards given away at Qt Developer Days

Thursday, January 3, 2013 - 13:52  •  By ICS  •  Raspberry Pi

As part of the initiative to put Qt 5 on Raspberry Pi, ICS gave away over 70 Raspberry Pi boards to interested developers at Qt Developer Days last week. If you were one of the lucky winners, be on the lookout over the next few days for an email from ICS so you'll know how to go about receiving it once they are available. More details and a video demo are available here: Qt 5 + Raspberry Pi

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Status Update

Thursday, January 3, 2013 - 13:51  •  By ICS  •  Raspberry Pi

The Raspberry Pi folks report that the first batch of production boards is finally in production. The first 10,000 units should start becoming available around the end of this month.

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