Today’s blog post is about something that should be simple and apparently it causes trouble: how to declare a qHash overload for a custom datatype. This is necessary when we want to use custom datatypes as keys in a QHash. From the documentation: A QHash’s key type has additional requirements other than being an assignable […]
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VS Code for Qt Applications – Part 2 A Technical Guide
Qt, range-based for loops and structured bindings Part 1
Qt has a long history. The first stable version was released before the first version of C++ was standardized and long before the different C++ compiler vendors started shipping usable implementations of the C++ standard library. Because of this, Qt often followed (and still follows) some design idioms that feel unnatural to the usual C++ […]
Getting rid of “volatile” in (some of) Qt
The upcoming version of the C++ Standard (C++2a) is proposing to deprecate certain usages of the volatile keyword, by adopting the P1152 proposal (Deprecating volatile). Despite the somewhat “flamboyant” title, the actual deprecated parts are very limited and indeed the paper limits the deprecation to somehow language/library corner cases and/or dangerous antipatterns. For instance certain […]
Qt World Summit 2019 talk videos are online
Did you miss the past Qt World Summit? Were you there, but you couldn’t attend that talk or two that you really wanted to see because the conference was so, so packed with awesome content? Fear no more! We are glad to announce that the talks at the past Qt World Summit 2019 in Berlin […]
A little hidden gem: QStringIterator
A few days ago Marc Mutz, colleague of mine at KDAB and also author in this blog, spotted this function from Qt’s source code (documentation): Apart from the mistake of considering empty strings not uppercase, which can be easily fixed, the loop in the body looks innocent enough. How would we figure out if a […]
Fix Qt Creator code highlighting on Windows/MSVC projects how to configure your projects to get code highlighting and code navigation back
Have you ever noticed code highlighting disappearing in Qt Creator for some projects, without any apparent reason? Can’t get Ctrl+Click to work on any class name or function name anymore? Maybe you have ignored it at first, got used to it, and decided it’s just one of those things that just “happen sometimes”; or maybe […]
UiWatchDog: a keepalive monitor for the GUI thread Part of the KDToolBox series
Continuing our blog series about KDToolBox, this time we will discuss UiWatchDog, a keepalive monitor for the GUI thread. Alive? A fundamental rule when writing applications in event-driven UI frameworks such as Qt is: do not ever block the GUI thread! The GUI thread is also usually called the main thread of the application — […]
Using Visual Studio Code for Writing Qt Applications
Software developers like tools, and in particular tools that make them more productive. So in this blog post, I am going to share with you some of the experiences some of us here at KDAB have had using Visual Studio Code for Qt development. Motivation of using Visual Studio Code instead of Qt Creator The […]
KDAB at C++ Russia, Saint Petersburg Oct 31 - Nov 1
C++ Russia is the premier C++ conference in East Europe which alternates between Moscow and Saint Petersburg. The conference lasts for two days starting October 31st. It will be held in the Park Inn by Radisson Pulkovskaya Hotel in the heart of Saint Petersburg. This year, the speaker line-up is quite impressive and includes names […]