== Mycroft Mark II - GUI using Qt 5.12 LTS ==

=== Build QT 5.12 LTS for eglfs ===
Install and compile Qt 5.12 LTS using this **excellent** guide: [https://www.tal.org/tutorials/building-qt-512-raspberry-pi].
==== Prerequisites ====
I did add 1GB swap and set the GPU memory to 16MB while building which worked without problem and took about 10 hours.
==== Download and build ====
The following steps are from that guide and is only here so that it does not get lost.
* wget http://download.qt.io/official_releases/qt/5.12/5.12.7/single/qt-everywhere-src-5.12.7.tar.xz
* tar xf qt-everywhere-src-5.12.7.tar.xz
* git clone https://github.com/oniongarlic/qt-raspberrypi-configuration.git
* cd qt-raspberrypi-configuration && make install DESTDIR=../qt-everywhere-src-5.12.7
* apt-get update
* apt-get install build-essential libfontconfig1-dev libdbus-1-dev libfreetype6-dev libicu-dev libinput-dev libxkbcommon-dev libsqlite3-dev libssl-dev libpng-dev libjpeg-dev libglib2.0-dev libraspberrypi-dev
* mkdir build
* cd build
then this command:
{{{
PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/share/pkgconfig \
../qt-everywhere-src-5.12.7/configure -platform linux-rpi-g++ \
-v \
-opengl es2 -eglfs \
-no-gtk \
-opensource -confirm-license -release \
-reduce-exports \
-force-pkg-config \
-nomake examples -no-compile-examples \
-skip qtwayland \
-skip qtwebengine \
-no-feature-geoservices_mapboxgl \
-qt-pcre \
-no-pch \
-ssl \
-evdev \
-system-freetype \
-fontconfig \
-glib \
-prefix /opt/Qt5.12 \
-qpa eglfs
}}}
* make -j2
* make install
This results in the complete build in /opt/Qt5.12

=== Building Kirigami ===
This is based on a combination of the official KDE guide to build the KDE framework at [https://community.kde.org/Get_Involved/development#Set_up_kdesrc-build] and this comprehensive guide at [https://jbbgameich.github.io/misc/2019/05/25/kdesrc-build-custom-qt.html]
As above these are the pure commands:
* mkdir -p ~/kde/src
* cd ~/kde/src/
* git clone https://anongit.kde.org/kdesrc-build.git  && cd kdesrc-build
* ./kdesrc-build --initial-setup
* source ~/.bashrc
* nano ~/.kdesrc-buildrc
change the qtdir so that it points to the Qt5.12 installation and comment the qt5-build-include and custom-qt5-libs-build-include
{{{
#    qtdir  ~/kde/qt5 # Where to find Qt5
    qtdir /opt/Qt5.12
...
# Qt and some Qt-using middleware libraries
# include /home/pi/kde/src/kdesrc-build/qt5-build-include
# include /home/pi/kde/src/kdesrc-build/custom-qt5-libs-build-include
}}}
* kdesrc-build kirigami --include-dependencies
==== Test Kirigami ====
Use the exmaple from [https://api.kde.org/frameworks/kirigami/html/classorg_1_1kde_1_1kirigami_1_1ApplicationWindow.html] (also attached) and try to run it.
* mkdir -p ~/ws_qt/kirigami
* cd ~/ws_qt/kirigami
either edit the file and paste the content
* nano main.qml
or download the attachement
* wget https://www.thinkthinkdo.com/trac/project1/raw-attachment/wiki/mycroft_mark-2_gui_qt5.11/main.qml
run it (showing additional debug output and adding the kde framwork build to the import path)
* QT_DEBUG_PLUGINS=1 QML_IMPORT_TRACE=1 QML2_IMPORT_PATH=/home/pi/kde/usr/lib/arm-linux-gnueabihf/qml /opt/Qt5.12/bin/qmlscene ~/ws_qt/kirigami/main.qml

=== build the mycroft GUI ===
This is following [https://github.com/MycroftAI/mycroft-gui] but building the GUI manually for the QT5.12 and Kirigami installation above
* cd ~
* sudo apt-get install git -y
* git clone https://github.com/mycroftai/mycroft-gui
* cd mycroft-gui
* sudo apt-get install -y git-core g++ cmake extra-cmake-modules gettext pkg-config
* mkdir build-testing
* cd build-testing
-- stuck here because it needs KF5 and KF5I18n so I am going back to building this from the KDE sources. In previous tries I did install the system package kio-dev but I don't want to do that again as I don't want to mix versions ---