Good news, everyone! Qt 5.5 has just been released! The release process of Qt 5.5 has been focused on stabilizing and improving performances. Once more KDAB is proud to be a part of the release, with its engineers constantly providing contributions and patches, as demonstrated by the commit graph of the last 16 weeks: In […]

In this projection demo a laptop takes care of communicating with the Android smartphone on one hand, and of displaying a QtQuick application which puts together all the information for projecting on the other hand. The information being displayed includes missed phone calls, emails, calendar, time, weather, etc. This information is retrieved on the Android […]

mPro (formerly Migari) is a comprehensive software system for the management, monitoring and automation of precision measurement systems in the context of quality control. It can integrate a wide variety of measurement hardware and buses and is programmable and extensible by the integrator and end user. This is necessary as such systems are generally custom […]

QNX CAR is a framework for building In-Vehicle Infotainment systems, including: the QNX OS a powerful mobile connectivity framework a best-in-class acoustic, noise reduction, and hands-free solution an HMI framework supporting HTML5, Qt, and other native UI toolsets. Using Qt5 on QNX, we created a mock-up of a modern interface for a sailing boat, to […]

Quick overview of profiling tools QtQuick is often used to create UIs for embedded devices. One SoC that is quite popular at the moment is the i.MX 6 board from Freescale, with its Vivante GC2000 or GC880 3D GPU. Performance on such a device matters, users expect a fluid interaction. With the QML Profiler, Qt […]

What is an Input Method and what do we need it for? To answer that question, let's see what Wikipedia says: "An input method (or input method editor, commonly abbreviated IME) is an operating system component or program that allows any data, such as keyboard strokes or mouse movements, to be received as input. In […]

Update: Here you have also the Chinese version, thanks goes to Foruok. In the last two Qt on Android episodes we learned how to use basic JNI on Android and how to use an external IDE to easily manage the Java part. In this episode, it is time to move forward and focus on extending […]

Qt is a native library at the heart. As a native (C++) library, it already outperforms most higher-level language libraries when it comes to startup performance. But if you're using native languages, you usually do so because you need to get the most out of the available hardware and being just fast may not be […]

Right from the start, we at KDAB have had lots of fun playing a leading role – and as the Qt experts, we look forward to continuing to contribute to the growing Qt community. As a toast to the next 20 years of fun and success, we are combining the company meeting, this year here […]

The multimedia layer in Qt contains various possibilities for including streaming video in your QtQuick applications - most commonly there's the Video element, which you include in your QML interface, specifying the source URL, playback options and so on. Unfortunately, on iOS you'll discover a limitation: the backend for QtMultimedia only supports window-level integration. In […]

Update: Here you have also the Chinese version, thanks goes to Foruok. In the last Qt on Android episode we learned the basics of JNI on Android in a Qt way. In this episode I'd like to focus on tools that will help us to be more productive when we extend our Qt on Android […]

Trading communication market leader IPC created revolutionary dealer boards by using the Qt software library Stock exchanges are some of the most stressful working environments where shares worth millions of Euros/Dollars are traded within milliseconds. Naturally, brokers and stock traders rely on state-of-the-art communications and trading systems to ensure constant availability and reliability of information […]

It has been very quiet around WEC platform support in Qt, and you would have been forgiven for thinking that nothing was happening. But behind the scenes, we have been tackling some pretty hard issues. We just did not blog about the ongoing work……until now. Be assured that the platform is still maintained and there […]

Recorded at the Qt Developer Days in Berlin in 2014. Abstract: It is easy to be enthusiastic about the technical merits of Qt. For those having to make technology choice decisions that impact the business for potentially a long time, that is not the only dimension, however. Risks need to be examined and trade-offs identified, […]

Using the QML engine and QtQuick scenegraph to introspect and analyze performance. Abstract: A fluid and performant user interface in QtQuick applications is an important factor, especially considering that users increasingly demand an "iPhone-like" experience, while at same time, applications often run on a resource-constrained embedded system. What can be done when a QtQuick application […]

Kevin Krammer compares QtWidgets and QtQuick Controls. Abstract: QtWidgets has been one of Qt's selling points throughout its two decade long existence. Its ability to blend into the target platform's look&feel with little or no effort on the part of application developers is unparalleled. The advent of powerful mobile and embedded devices, and later touch […]

Abstract: The new QtWebChannel module is a ready-to-use solution to make any QObject accessible to arbitrary JavaScript clients. KDAB already uses it in production for a client project on embedded devices, where it proofed to be an essential part for the HTML app framework embedded in a QML chrome. Thanks to QObject introspection, any object […]

Abstract: This presentation will start by explaining the concept of inqlude.org and showing some of the libraries available there, pointing in particular to those that will be useful in the rest of the presentation. The multiple ways to use inqlude.org will be discussed: browsing the website and downloading sources, using the command-line tool to install […]

Abstract: Moc's job is two-fold: it generates the qt_metacall() member function that dispatches incoming calls to slots and implements reading and writing of properties, and it generates the QMetaObject containing information about what signals, slots and properties are available, providing runtime introspection capabilities. All of this is fixed at compile time though, a limitation that […]

Abstract: With the launch of the Qt Project in 2011 it has been made possible for everyone, individual or organization, to directly submit patches to the Qt codebase. Whether it's a small fix to the documentation, an improvement to existing code, or even a brand new module altogether, the procedure is the same. The presentation […]