I’ve planned to get familiar with Qt Scene Graph for a several months now, but Gunnar Sletta’s presentation at the Qt Developer Day 2010 in Munich kicked me to actually do something. The goal of my Qt Scene Graph research project can be listed as follows:

• How to build and use Qt Scene Graph
• Get the whole picture of scene graph architecture
• And check out the code i.e how it works
• Try to create something of your own by using Qt Scene Graph

Before going any further, I go directly to the last bullet point and show a video about small QML demo which uses Qt Scene Graph. I borrowed the particle parts from Qt Scene Graph’s testing code and created few vertex and fragment shaders for rotation, scaling and manipulating colors.

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Here is the latest video about the latest version of QuickFlickr on N900:

New features and future plans

I have spent little time for making QuickFlickr more mature and improving its usability. The following set of features have been implemented:

• Latest uploads from contacts
• Contact photostream
• Single image details: views, tags, description, comments, displaying image details in a webview, displaying a webpage from link inside the description
• Favorites: viewing your favorite images, adding and removing a favorite image
• Recent activity: display number of comments and favorites of your images, displaying and adding comments

Future improvements and new features:

• Displaying a “loading” indicator during loading / waiting
• Displaying information about people that have your image as a added a fave
• User’s groups and image pools
• Uploading a picture to Flickr
• QML based viewfinder and possibility to take a pic from N900′s camera

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I will promote Cybercom’s FREE QtQuick & KDE Plasma event because I’m partially responsible of it. As you may have noticed, I like Qt so therefore I’m very glad that my employer is willing to pay all the fun:)

The event will be September 7th in Technopolis, Ruoholahti, Helsinki, Finland.

So first of all, there will be kick ass speakers: Alexis Menard, one of the developers behind Qt Quick and Marco Martin, who is responsible of what happens in Plasma Netbook project. Here are the videos that Alexis and Marco have made about their presentations:

Alexis Menard:

Marco Martin:

The Idea of the Event

The idea of the event is to have interesting topics, good speakers and to let the audience to participate in the event. Yes, if you have a Qt based, especially Qt Quick based project, you can demo it in the event. Don’t forget to mention that in “request invitation form”. So basically we are “spreading the word of Qt” and we want you to be part of it.  You can checkout the agenda from here: http://www.cybercomchannel.com/?page_id=187

Remember that the event is FREE, but you must request an invitation there. We wanted to keep it that way because the amount of seats is limited. You can request an invitation from here: http://www.cybercomchannel.com/?page_id=175.

If you want to demonstrate your project, then you have a bigger change to get invited. Of course we want to get there as many people as we can fit in the room.

Another way how we want audience to be involved in, is to have discussion there. Yes, you can ask questions, raise some issues if you have found something that might be problematic or just give feedback how do you feel about Qt Quick or Plasma.

Of course you are also welcome to the event if you are just interested in Qt and what’s happening in the Qt world. You don’t need to be hardcore developer or developer at all.

Let’s hope that we will see there bunch of people and will will have a good event.

Last spring I started to write QuickFlickr application i.e. a Flickr client for N900. Back then I wrote this article of it. For me this is just a learning process to study QML and trying to figure out how I can write a real application using C++ for a lower layer and QML for the UI.  The biggest challenge so far has been to design C++ side so that it provides usable interface to QML side. Before going too deep into details here’s the video about QuickFlickr running first on OS X and after that on N900.

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I was in Linux Foundation Collaboration Summit 2010, but as you probably know, everyone’s is stucked here now. As many of my friends have said, the San Francisco is not the worst place on earth to get stucked. I tried to get a flight to the southern part of Europe this morning, but it was impossible. Update: I manage to get flight to the Madrid for Tuesday. After that I decided to do some work and I wrote an article about the Collaboration Summit. You can read it from here.

Instead of staying the whole day in the hotel room,  I headed to the Fisherman’s Wharf to the Bay area. The weather was nice and I met my new Swedish friends Jonas and Linus there. I’ve been hanging around with these two guys here in SF for couple days now.

Jonas and Linus

The picture above is actually not from the Fisherman’s Wharf, it’s from the Apple Store nearby the Union Square.

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