Dev Loop

Jake Petroules

What’s New in Qt on Apple Platforms

Published Monday January 30th, 2017 | 3 Comments on What’s New in Qt on Apple Platforms
Posted in Build system, Dev Loop, iOS, macOS, Qt

Note that throughout this blog post, the term “Apple Platforms” will be used to refer to all four Apple operating systems (macOS, iOS, tvOS, and watchOS) as a whole. I thought it would be a good time to share some of the highlights of what’s new in Qt on Apple Platforms with the recent release of Qt 5.8. […]

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Karsten Heimrich

Qt Visual Studio Tools Insights

Published Friday January 27th, 2017 | 6 Comments on Qt Visual Studio Tools Insights
Posted in Dev Loop, integration, Labs, Qt, Random, Releases, Uncategorized, upgrading, Visual Studio, Windows

While working on the Qt Visual Studio tools, I had to think about how to locally perform and test the update process for extensions. As already known to most Visual Studio users, the IDE provides a way to setup your own private extension gallery. To do so, one has to open the Visual Studio Tools | […]

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Laszlo Agocs

OpenGL Core Profile Context support in QPainter

Published Friday January 27th, 2017 | 2 Comments on OpenGL Core Profile Context support in QPainter
Posted in C++, desktop, Dev Loop, Graphics, macOS, OpenGL, Painting, Qt, UI, Windows

As many of you may know, QPainter has a multi-backend architecture and has two main paint engine implementations under the hood in Qt 5: the raster paint engine and the OpenGL2 paint engine, designed for OpenGL ES 2.0. The GL Paint Engine While in many ways the raster paint engine can be considered one of […]

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Jesús Fernández

Connecting your Qt application with Google Services using OAuth 2.0

Published Wednesday January 25th, 2017 | 13 Comments on Connecting your Qt application with Google Services using OAuth 2.0
Posted in C++, Cloud, Dev Loop, Internet, Internet of Things, Network, Qt, Releases, Tutorial | Tags:

With the Qt 5.8 release, we have added QtNetworkAuth as a Technology Preview module. It is focused on helping developers with this auth******** madness. Currently, it supports OAuth1 and OAuth2. In the future, it will feature more authorization methods. This post is a first glance of the OAuth2 support in Qt, it covers how to use Google to authorize an application. Your application […]

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Qt SCXML and State Chart Support in Qt Creator

Published Monday January 23rd, 2017 | 2 Comments on Qt SCXML and State Chart Support in Qt Creator
Posted in Dev Loop, QtCreator, SCXML

Qt has provided support for state machine based development since introduction of Qt State Machine Framework in Qt 4.6. With the new functionality introduced in Qt 5.8 and Qt Creator 4.2 state machine based development is now easier than ever before. Qt 5.8 introduces fully supported Qt SCXML module that makes it easy to integrate SCXML […]

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Laszlo Agocs

Inside QImage (with a touch of Qt Quick and OpenGL)

Published Friday January 20th, 2017 | 4 Comments on Inside QImage (with a touch of Qt Quick and OpenGL)
Posted in C++, Dev Loop, Graphics, OpenGL, Painting, Qt Quick | Tags: ,

QImage is the most common container for image data in Qt applications. Getting a QImage that contains the pixel data of an image loaded from a file is fairly self-explanatory: QImage img; img.load(“some_image.png”); This can then be used with QPainter, can be passed to widgets, and can also be utilized in Qt Quick scenes via […]

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Frederik Gladhorn

Qt Speech (Text to Speech) is here

Published Friday January 20th, 2017 | 14 Comments on Qt Speech (Text to Speech) is here
Posted in Accessibility, Dev Loop, News, Qt, Releases | Tags:

I’m happy that with Qt 5.8.0 we’ll have Qt Speech added as a new tech preview module. It took a while to get it in shape since the poor thing sometimes did not get the attention it deserved. We had trouble with some Android builds before that backend received proper care. Luckily there’s always the […]

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Andy Nichols (nezticle)

Should you still be using QGraphicsView?

Published Thursday January 19th, 2017 | 36 Comments on Should you still be using QGraphicsView?
Posted in Dev Loop | Tags: , ,

There was a time when the Qt Graphics View Framework was seen as the solution to create modern user interfaces with Qt. Now that Qt Quick 2 has matured does the Graphics View Framework still have a place in Qt? At the Qt World Summit 2016 I gave a presentation entitled “The Curse of Choice.” […]

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Eskil Abrahamsen Blomfeldt

How to shoot yourself in the foot using only a scene graph (neat optimization trick inside)

Published Thursday January 19th, 2017 | 9 Comments on How to shoot yourself in the foot using only a scene graph (neat optimization trick inside)
Posted in Declarative UI, Dev Loop, Graphics, OpenGL, Performance, Qt, Qt Quick 2, Text and font handling, UI

I am trying to get into the habit of blogging more often, also about topics that may not warrant a white paper worth of text, but that may be interesting to some of you. For those of you who don’t know me, I am the maintainer of the text and font code in Qt, and recently I came across a curious customer case where the optimization mechanisms in the Qt Quick scene graph ended up doing more harm than good. I thought I would share the case with you, along with the work-around I ended up giving to the customer.

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Laszlo Agocs

Which OpenGL implementation is my Qt Quick app using today?

Published Wednesday January 18th, 2017 | 4 Comments on Which OpenGL implementation is my Qt Quick app using today?
Posted in Declarative UI, Dev Loop, Embedded, Graphics, Performance, Qt Quick

Qt Quick-based user interfaces have traditionally been requiring OpenGL, quite unsurprisingly, since the foundation of it all, the Qt Quick 2 scenegraph, is designed exclusively with OpenGL ES 2.0 (the top of the line for mobile/embedded at the time) in mind. As you may have heard, the graphics API story is a bit more inclusive […]

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