Touchscreens and modern user interfaces are migrating into every type of medical machine: ultrasound, infusion, CAT, MRI, x-ray, care monitors, surgery displays, information tablets, and even patient self-service systems. Touchscreens are also helping with hygiene requirements as they are liquid-proof and easily disinfected because the display is in a sealed enclosure. Qt is an ideal […]

The Challenge Previously on this blog, we featured a series of articles about our QML-based presentation tool, SlideViewer. To quickly recap: SlideViewer is a presentation program that allows writing slides entirely in QML. There are situations in which the slide deck needs to be available in PDF format in addition to the QML source: For […]

Hybrid applications, which mix a UI built with Qt Widgets or Qt Quick with embedded HTML websites, are very popular. In particular, something like an HTML 5 app framework is often requested by customers. Qt WebKit makes it trivial to embed HTML content in any graphical application. But how does one bridge the gap between […]

Vectors. Moving away from my original plan, today we will be talking about Vectors. To start this series of posts I had a main motivator, SVG. It is a great file format, it's the file type I use day in day out and the format I use the most to create all of my images... […]

A couple of months ago, Jesper Pedersen introduced our presentation tool for trainings, called SlideViewer. As SlideViewer is mainly used for our Qt and Squish trainings, we naturally have many code examples on the slides, ranging from C++ and QML to Python and XML. In this blog post, we will take a closer look at […]

Several previous posts have introduced our SlideViewer tool which we created for use in the various trainings we deliver. The tool started out as an experiment, created using basic QtQuick 2 Items. Startup configuration was specified by command line arguments, and a simple Keys.onPressed function provided most of the runtime control: both navigating around the […]

This is a typical situation when you program a GUI for an application. You have just created a new control, you start your application and... no control. But now: Is it obscured? Is it misplaced? Is it completely transparent or set to 'invisible'? Is my custom OpenGL-stuff broken or is the item actually not created […]

In the previous blog post, we talked about the importance of pixels and their indivisible nature, the way we deal with that in the icon area and introduced the concept of PPI dependable UIs - all this to have truly scalable graphics in QML. We used the BorderImage element to illustrate how an element could […]

CMake 3.0 was released last week with many major new features and new Qt integration for uic and rcc. A major change with this CMake release is the new documentation system based on reStructuredText and Sphinx. Sphinx has the ability to generate Qt Assistant files, so these are now easy to create reproducibly from the […]

Introduction Following on from the previous articles on SlideViewer, we shall now investigate another piece of the puzzle towards making SlideViewer usable in practise. Namely, getting the content rendered from our domain specific language and on to the screen or projector for the audience to marvel at. Those of you that have ever presented at […]

In the earlier post, we talked about the difficulty of scaling Uis across the current PPI range we have on the mobile and embedded space. We also hinted that the most common way to avoid this problem was done via providing several image assets that help to mitigate this issues. How does it work? How […]

A User Experience is not defined to exist in a single form factor any more. It is expected to be able to flow from one device to another, seemingly adapting itself to each interaction paradigm, and yet retain branding, mood and overall look and feel across multiple platforms. On the other hand, it's expected that […]

In my previous blog, I talked about what characteristics made a good app for Qt in the Android environment. I'll paraphrase an insightful response from Artem Marchenko -- my blog post is really talking only about standalone apps, and not Android integrated ones. That's correct--my blog focused on "easy wins" - areas where you could […]

June 10, 12 and 16 - 2014. Continuing from our springtime European tour, we are offering hands-on training sessions this June in New York, San José and Chicago. Each of these will be a free, three-hour, hands-on session that delves into the internals of Qt on Android. Learn how to: set up the Qt development environment for […]

Behind the screen - development of a QML application. Usually we do not get to talk about the innovative solutions our employees find to almost impossible problems on a daily basis - I guess that is just part of life as a consulting company. Recently we developed an in-house application, and that gives us the […]

Introduction At Qt developer Days in Berlin 2013 I had an Aha! moment. I saw a presentation written in QML rather than the usual Powerpoint/LibreOffice/Keynote. It wasn't that I did not imagine this was possible, rather the contrary, after all in KDAB we have more than 3000 slides on Qt-related topics, all written in .... […]

The power of Qt running on the ubiquity of Android is a potent combination that can be used to great effect in a number of different applications. But are there certain apps that really shine when they’re built using this dynamic duo? Before I go any further, let me introduce myself. My name is Andy […]

erratum 2014-04-13: Updated Bundle Qt libs pros and cons. Update2: Here you can read also the Chinese version, thanks goes to Foruok. After we've learned how to set up the development environment and how to use Qt on Android, it's time to move forward and in this article we are going to learn about different […]

In the last few weeks I've been working on a prose description of how the type-erased container iteration with QVariant works. The existence of the feature and how it can be used was described in my presentation at DevDays 2013. The slides are available here. The video is not available currently, but will be published […]

Urbi et Orbi A new year just started a few weeks ago, but Qt on Android doesn’t have time to rest :). The secret meeting At the beginning of the year I attended a very important workshop in Oslo. For two full days KDAB (me) and Digia (Oslo office folks) secretly discussed the future of […]