Posts about Qt, for feeds like planetqt and planetkde
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 …
Property bindings are one of the most interesting features of the QML language. In QML, when we set a value on a property, the right hand side expression isn’t evaluated just once to produce a value, like in a ordinary imperative language.
In particular, if the expression involves other properties, then the property we’re setting becomes bound to the properties in the expression: whenever they change their values, then the expression is automatically evaluated again, and the target property value …
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.…
This article is part of a blog series about Clang Tidy. In the previous article we learned about the general usage of Clang Tidy to automatically refactor source code…
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. …
As my first subject for this animation blog series, we will be taking a look at Animation curves.
Curves, or better, easing curves, is one of the first concepts we are exposed to when dealing with the subject of animation in the QML space.
What are they?
Well, in simplistic terms, they are a description of an X position over a Time axis that starts in (0 , 0) and ends in (1 , 1). These curves are …
We have released version 2.8.0 of our Qt application introspection tool GammaRay. GammaRay allows you to observe behavior and data structures of Qt code inside your program live at runtime.
A big focus in this release is improvements to the Qt Quick inspector, which gained layout helper grids and Qt Quick Controls 2 tracing, as well as initial support for the software renderer. We have also optimized the performance of the remote view, which previously managed to saturate a …
As there were some complex issues around conformity in PDF document creation within Qt, KDAB let me spend some time digging into it so we could make sure that Qt’s PDF engine generates documents up to ISO-standard.
Nowadays, many official institutions have the requirement to archive their data digitally and PDF is a first class citizen for this purpose. However, since the overall PDF standard is too complex, to guarantee that PDF documents can be rendered in their entirety in …
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