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 …
Qt 5.9 has just been released!
This release marks two important milestones for the Qt Project. The first is that now the Qt 5 series has had more releases than any other Qt version ever (the last release of the Qt 4 series was Qt 4.8). The second milestone is that Qt 5.9 will be a Long Term Support release, therefore providing to many users a stable foundation to build their applications upon.
KDAB has been a significant contributor to …
With an apology to English-speaking audiences 🙂
Anche quest’anno KDAB partecipa a QtDay, la conferenza italiana interamente dedicata a Qt. Giunta oramai alla sua sesta edizione, QtDay continua a crescere. Quest’anno QtDay si articola in 3 giorni: il primo dedicato a un training su QML, seguito da due giorni di conferenza vera e propria.
Durante la conferenza terrò due interventi:
KDAB è lieta di annunciare una data italiana per il corso Programmazione Qt/QML per sistemi embedded, che si svolgerà a Milano dal 12 al 14 settembre 2017.
Qt è un application framework moderno e ricco di funzionalità, utilizzato per realizzare applicazioni cross-platform per sistemi embedded, mobile e desktop. Qt è usato da oltre 800.000 sviluppatori in tutto il mondo per creare interfacce di domotica e home automation; sistemi di in-vehicle infotainment (IVI); pannelli di controllo industriale; applicazioni desktop …
QZXing is a very useful library: It provides an easy to use Qt integration API around the barcode scanning library ZXing (zebras crossing).
Because it is so easy to setup QZXing in a Qt application, we and most of our customers end up using it when they need to scan images for barcodes. There is, or rather was, a big problem though: When you want to analyze a live camera video stream, e.g. from a phone camera, the latency can …
Qt 5.8 has just been released! Another great release of Qt, made possible by thousands of commits by over a hundred different contributors:
And here we are again, with the usual showcase of the most outstanding contributions to Qt 5.8 developed by KDAB engineers.
In no particular order:
Qt 3D continues to receive lots of improvements and bugfixes, thanks to the hard work of …
We have released version 2.7 of our Qt application introspection tool GammaRay. GammaRay allows you to observe the behavior and data structures of Qt code inside your program live at runtime.
Here are a few of the highlights of this release:
In the last blog post we gave a very high level introduction to the Qt Quick 2 renderer. We also showed how various signals are emitted by the renderer during the synchronization and rendering steps. In this blog post we’re going to discuss those signals and show how they can be used to implement overlays and underlays.
Let’s start again by looking at this diagram of the synchronization between the render thread of …
For today’s blog I would like to share with you the little adventure I had when fixing a very strange bug in Qt.
Don’t think about this too much, just guess: what does this QML snippet print?
import QtQuick 2.0
QtObject {
Component.onCompleted: {
console.log("240000000000" == "3776798720");
}
}
There are no JavaScript semantic tricks involved; and using either == or === does not change the result in any way.
Did you get it?
Here’s …
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