https://raymii.org/s/tags/kde.xml RSS feed for tag kde on Raymii.org https://raymii.org/s/blog/Qt_5.15_LTS_Docker_Image_for_Android_with_OpenSSL.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/blog/Qt_5.15_LTS_Docker_Image_for_Android_with_OpenSSL.html Recently I got an email from Google regarding the API level of [Leaf Node Monitoring](https://leafnode.nl), my open source monitoring app for Windows, Linux and Android. The Play Store version must be updated to target API level 33. For Windows and Linux I'm building the app automatically in a CI environment but the Android build was still a manual process. Until now, because after a bunch of messing around with Android NDK versions, OpenSSL library paths and Qt compile flags I can automatically build Leaf Node Monitoring in my CI. I'm using Woodpecker CI and that requires every build step to be executed in a Docker image. There are a few Qt docker images floating around but they are all using the pre-built 5.15.2 version by extracting it from the Qt Online Installer. That version is quite old, 5.15.15 LTS was released [a few days ago for Commercial License Holders](http://web.archive.org/web/20230902132649/https://www.qt.io/blog/commercial-lts-qt-5.15.15-released) on August 31, so after 1 year it will become available as open source. My docker image builds Qt from source using the `5.15 KDE Qt Patch Collection` branch for Android and it includes OpenSSL. This is as far as I know the most up to date docker image for Qt 5.15, currently at 5.15.10 LTS. Wed, 13 Sep 2023 22:00:00 GMT Wed, 13 Sep 2023 22:00:00 GMT https://raymii.org/s/blog/Qt_add_moc_includes_to_speed_up_compilation.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/blog/Qt_add_moc_includes_to_speed_up_compilation.html The Meta-Object Compiler, `moc`, handles Qt's C++ extensions and it is required for signals and slots and properties in Qt. `moc` reads C++ header files and if the `Q_OBJECT` macro is used, it generates an extra `.cpp` file named `moc_filename.cpp` containing extra (meta-object) code. This post has a bit of background information and a shell script to automatically include `moc_*.cpp` files in your code whenever `Q_OBJECT` is used. If you use `qmake`, this will probably speed up your build and if you use `cmake`, this will probably speed up incremental builds (when `CMAKE_AUTOMOC` is `on`). Mon, 12 Dec 2022 00:00:00 GMT Mon, 12 Dec 2022 00:00:00 GMT https://raymii.org/s/blog/Qt_5.15.3_OpenSource_released.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/blog/Qt_5.15.3_OpenSource_released.html Qt is a nice C++ framework with a GUI toolkit on top, actually, 2 toolkit, Widgets and Qml. Qt is available under the GPL and LPGL, open source licenses and a closed source license. [Back in 2020](https://lwn.net/Articles/817129/), the Qt company decided to [start a war](https://ev.kde.org/2020/04/06/changes-in-qt-and-the-kde-free-qt-foundation/) against their own users and contributors by withholding the 5.15 code, only releasing them under a closed license, making the offline installers available to paid customers and requiring a Qt account for the online installer. Due to [an agreement](https://www.qt.io/faq/3.2.-why-do-you-have-an-agreement-with-kde-about-your-licensing-what-kde-is-and-whats-the-history-of-qt-and-kde) with the [KDE project](https://kde.org/community/whatiskde/kdefreeqtfoundation/) they are obliged to release the code after one year under an open source license, and that time has come for 5.15.3. For most LTS releases, the Qt company writes a blog post, but this open source release only gets a [mailing list post](https://lists.qt-project.org/pipermail/development/2022-March/042262.html) (One day and 4 blog posts later, [no mention of 5.15.3 on their blog](https://archive.ph/IvMSn)). This short post is intended to give a bit more publicity to that release and to tell you about the KDE Qt 5.15 LTS patch collection. Even if I might not agree with the business practices, the framework is nice to work with. Fri, 04 Mar 2022 00:00:00 GMT Fri, 04 Mar 2022 00:00:00 GMT https://raymii.org/s/articles/Expose_any_QT_program_via_VNC.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/articles/Expose_any_QT_program_via_VNC.html A few months ago I wrote about [Microsoft Teams running on a coffee machine. That was a fun work experiment where I got a VNC client running on the Linux-based coffee machines that we produce at work. In the comments on hackernews Jean-Michaël Celerier pointed me to the reverse, a way to expose any Qt application over VNC. This article shows you how I use this feature to work on our Qt 5 based coffee machine frontend as well as how you can use this on your machine, for example, to expose Dolphin, the KDE file manager, over VNC. Mon, 20 Sep 2021 00:00:00 GMT Mon, 20 Sep 2021 00:00:00 GMT