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KDAB Training at Qt World Summit Berlin 5th December 2018

KDAB is offering eight superb Training Classes in Berlin, you can see the list below, which includes one run by our long-term collaborator, froglogic. All the rest are delivered by KDAB engineers. There are five classes in our Introductory group, and three in the Advanced. Read the descriptions carefully to see which one you’d like […]

KDAB au Capitole du Libre 2018 17 - 18 novembre, Toulouse, France

Du 17 au 18 novembre, KDAB sera présent au Capitole du Libre 2018 à Toulouse. Depuis sa création en 2011, KDAB (France) soutient le monde du logiciel libre en étant Sponsor Or du Capitole du Libre. L’événement qui a lieu à l’INP-ENSEEIHT à Toulouse accueille environ 1500 participants chaque année et l’entrée y est libre […]

New in Qt 5.11: improvements to the model/view APIs (part 2)

In the last episode of this series we discussed QAbstractItemModel::checkIndex(). QAbstractItemModel::checkIndex() is a function added in Qt 5.11 that allows developers of model classes to perform some validity checks on the QModelIndex objects passed to the model; specifically, on the indices passed to the APIs that model classes need to implement (rowCount(), columnCount(), data, setData(), […]

Efficient custom shapes in Qt Quick Because rectangles, even rounded ones, can only get you so far.

QtQuick includes basic visual item to construct many common user-interface components, but people often ask how to create different visual appearances, beyond rectangles, round-rectangles and images. There’s various solutions to this problem, and with Qt 5.10, there’s the new Shapes module which makes it easy to define paths, ellipses and other standard SVG drawing elements. […]

Qt Quick without a GPU: i.MX6 ULL on small embedded devices

  With the introduction of the Qt Quick software renderer it became possible to use Qt Quick on devices without a GPU. We investigated how viable this option is on a lower end device, particularly the NXP i.MX6 ULL. It turns out that with some (partially not yet integrated) patches developed by KDAB and The […]

Writing a Custom Qt 3D Aspect – part 2 Setting up the backend and communications

Introduction In the previous article we gave an overview of the process for creating a custom aspect and showed how to create (most of) the front end functionality. In this article we shall continue building our custom aspect by implementing the corresponding backend types, registering the types and setting up communication from the frontend to […]

Writing a Custom Qt 3D Aspect – part 1 Extending Qt 3D via Aspects

Introduction Qt 3D has a flexible and extensible architecture that allows us to easily add our own new functionality to it without disrupting the existing features. The functionality of Qt 3D is divided among so-called aspects, each of which encapsulates a particular subject domain such as rendering, input, or animation. This short series of articles […]

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