Clazy is a clang plugin which extends the compiler with over 50 warnings related to Qt best practices ranging from unneeded memory allocations to API misuse. It’s an opensource project spawned by KDAB’s R&D efforts for better C++ tooling.
Today, we’re proud to announce a Clazy Web UI to view all warnings emitted by Clazy, as well as normal gcc/clang issues.
Furthermore, we’ll be hosting it publicly for the Qt code base. This means that you can now head …
Close to three months after the initial hotspot release, I’m happy to announce the release of version 1.1.0. Quick recap: Hotspot is a graphical frontend to the Linux perf profiler suite. It allows you to visually analyze perf.data files with the built-in Flame Graph and the Bottom-Up, Top-Down, or Caller-Callee data tables. It is a free open source R&D project by KDAB, you can find the code on GitHub.
Version 1.1.0 adds two important new features to this …
When Competence Center ISOBUS (CCI) decided to bring their terminal up-to-date as part of the Group’s strategy to remain top of the field in advanced agritechnical innovation, they asked KDAB to help.
The user interface in the operator’s cab displays multiple applications. It can control complex agricultural tools, receive and display complex reports and much else besides. Crucially, it also needs to be easy to operate and understand.
For this project, QtQuick on Linux Embedded was the natural choice, but …
We have released version 2.8.1 of our Qt application introspection tool GammaRay. This release contains a number of important bugfixes as well as support for Qt 5.9.2. Especially if you are experiencing corrupt views or crashes when searching in the object tree, or having trouble attaching to a process on Windows, you want to upgrade to the new version. The same applies to users of bleeding edge Qt versions experiencing build failures.
Next to maintaining the 2.8 series we …
QtQuick is a popular choice for creating HMIs for embedded devices. The hardware on these devices is often constrained and less performant than their desktop equivalents, this requires extra care from software developers in delivering a fluid user experience. KDAB is regularly involved in improving the performance of QtQuick HMIs on such devices for their customers.
In this demonstration, we will show how to profile and optimize the performance of a QtQuick speedometer, an example taken from an actual embedded …
The program for CppCon 2017 is now published!
CppCon is the annual conference for the C++ community: five days packed with over 100 talks, as well as inspiring keynotes, panel discussions, hallway chats, fun evening events and much more. CppCon is a project of the Standard C++ Foundation, a not-for-profit organization whose purpose is to support the C++ software developer community and promote the understanding and use of modern, standard C++ on all compilers and platforms.
It’s our pleasure …
Qt now provides a new module named Qt 3D. In this very short talk Giuseppe D’Angelo introduces some of the design ideas behind Qt 3D, discuss its use cases, and shows how simple it is to get 3D content in an application when using Qt 3D APIs.…
In the previous episode we presented how to uncover 32 Qt best practices at compile time with clazy. Today it’s time to show 5 more and other new goodies present in the freshly released clazy v1.2.
Warns when the content of SIGNAL(), SLOT(), Q_ARG() and Q_RETURN_ARG() is not normalized. Using normalized signatures allows to avoid unneeded memory allocations.
Example:
// warning: Signature is not normalized. Use void mySlot(int) instead of void mySlot(const int) …
When using Qt’s model/view framework, filtering has always been very easy with QSortFilterProxyModel. To filter a list using text typed by the user in a line-edit, you have certainly been applying the standard recipe:
textChanged signal to the proxy’s setFilterFixedString slot; done!But what if the model is a tree rather than a flat list?
Let’s use the tree below as an example. As you can …
After many months of work, I’m very pleased to finally announce KDAB’s latest R&D project to the public: hotspot – a GUI for the Linux perf profiler.
I have used Linux perf a lot over the past years. …
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