Mobile and Embedded

I had a similar situation. I needed to control 4 sliders at the same time. I created a slider in a qml file. I added that qml file to the interface with 4 separate QQuickWidgets and I had 4 simultaneously controllable sliders. Cpp Ui adapt touch event to mouse event. Due to mouse behaviour, you cant click or slide two object at the same time. :D You should take a look : https://github.com/aaronsnoswell/QMLVirtualJoystick/tree/master

I created a bug report for this case. https://bugreports.qt.io/browse/QTBUG-129946

Hi, GitHub is only a mirror of Qt's sources so what exactly did you install ? As for your project are you using something like cmake to manage your project ?

Hi, From memory, some of the dependencies that used to be vendored were taken out in 5.15. It might be such a case. You should check the test results to see exactly what made them fail.

Hi Jason, We are too facing similar keyboard integration error for embedded linux. In this case did you rebuild the whole QT source code of v5.11 OR just QtQuickControl2 module only?

@JKSH Thank you, In fact, on this aarch-linux mechine, qtvirtualkeyboard works well on Konsole, I don't know how Konsole did it. I even tried Pyside2 5.12.5 and it didn't help. I just install qt5, and tried a QTextEdit case under Qt/C++, qtvirtualboard works well. Aren't C++ and pyside calling the same underlying library? # apt show konsole Package: konsole Version: 4:19.12.3-0ubuntu1 Priority: optional Section: universe/kde Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com> Original-Maintainer: Debian/Kubuntu Qt/KDE Maintainers <debian-qt-kde@lists.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 3,951 kB Provides: x-terminal-emulator Depends: konsole-kpart (= 4:19.12.3-0ubuntu1), kio, libc6 (>= 2.17), libkf5configcore5 (>= 4.98.0), libkf5configwidgets5 (>= 4.96.0), libkf5coreaddons5 (>= 5.2.0), libkf5crash5 (>= 5.15.0), libkf5dbusaddons5 (>= 4.99.0), libkf5globalaccel5 (>= 5.0.0), libkf5i18n5 (>= 4.97.0), libkf5iconthemes5 (>= 4.96.0), libkf5kiowidgets5 (>= 4.96.0), libkf5notifyconfig5 (>= 4.96.0), libkf5widgetsaddons5 (>= 4.96.0), libkf5windowsystem5 (>= 4.100.0), libkf5xmlgui-bin, libkf5xmlgui5 (>= 4.98.0), libqt5core5a (>= 5.10.0), libqt5gui5 (>= 5.9.0~) | libqt5gui5-gles (>= 5.9.0~), libqt5widgets5 (>= 5.9.0~), libstdc++6 (>= 4.1.1) Suggests: lrzsz Breaks: kde-l10n-ar (<< 4:16.04.3-6~), kde-l10n-ast (<< 4:16.04.3-6~), kde-l10n-bg (<< 4:16.04.3-6~), kde-l10n-bs (<< 4:16.04.3-6~), kde-l10n-ca (<< 4:16.04.3-6~), kde-l10n-cavalencia (<< 4:16.04.3-6~), kde-l10n-cs (<< 4:16.04.3-6~), kde-l10n-da (<< 4:16.04.3-6~), kde-l10n-de (<< 4:16.04.3-6~), kde-l10n-el (<< 4:16.04.3-6~), kde-l10n-engb (<< 4:16.04.3-6~), kde-l10n-eo (<< 4:16.04.3-6~), kde-l10n-es (<< 4:16.04.3-6~), kde-l10n-et (<< 4:16.04.3-6~), kde-l10n-eu (<< 4:16.04.3-6~), kde-l10n-fa (<< 4:16.04.3-6~), kde-l10n-fi (<< 4:16.04.3-6~), kde-l10n-fr (<< 4:16.04.3-6~), kde-l10n-ga (<< 4:16.04.3-6~), kde-l10n-gl (<< 4:16.04.3-6~), kde-l10n-he (<< 4:16.04.3-6~), kde-l10n-hi (<< 4:16.04.3-6~), kde-l10n-hr (<< 4:16.04.3-6~), kde-l10n-hu (<< 4:16.04.3-6~), kde-l10n-ia (<< 4:16.04.3-6~), kde-l10n-id (<< 4:16.04.3-6~), kde-l10n-is (<< 4:16.04.3-6~), kde-l10n-it (<< 4:16.04.3-6~), kde-l10n-ja (<< 4:16.04.3-6~), kde-l10n-kk (<< 4:16.04.3-6~), kde-l10n-km (<< 4:16.04.3-6~), kde-l10n-ko (<< 4:16.04.3-6~), kde-l10n-lt (<< 4:16.04.3-6~), kde-l10n-lv (<< 4:16.04.3-6~), kde-l10n-mr (<< 4:16.04.3-6~), kde-l10n-nb (<< 4:16.04.3-6~), kde-l10n-nds (<< 4:16.04.3-6~), kde-l10n-nl (<< 4:16.04.3-6~), kde-l10n-nn (<< 4:16.04.3-6~), kde-l10n-pa (<< 4:16.04.3-6~), kde-l10n-pl (<< 4:16.04.3-6~), kde-l10n-pt (<< 4:16.04.3-6~), kde-l10n-ptbr (<< 4:16.04.3-6~), kde-l10n-ro (<< 4:16.04.3-6~), kde-l10n-ru (<< 4:16.04.3-6~), kde-l10n-sk (<< 4:16.04.3-6~), kde-l10n-sl (<< 4:16.04.3-6~), kde-l10n-sr (<< 4:16.04.3-6~), kde-l10n-sv (<< 4:16.04.3-6~), kde-l10n-tr (<< 4:16.04.3-6~), kde-l10n-ug (<< 4:16.04.3-6~), kde-l10n-uk (<< 4:16.04.3-6~), kde-l10n-wa (<< 4:16.04.3-6~), kde-l10n-zhcn (<< 4:16.04.3-6~), kde-l10n-zhtw (<< 4:16.04.3-6~) Replaces: kde-l10n-ar (<< 4:16.04.3-6~), kde-l10n-ast (<< 4:16.04.3-6~), kde-l10n-bg (<< 4:16.04.3-6~), kde-l10n-bs (<< 4:16.04.3-6~), kde-l10n-ca (<< 4:16.04.3-6~), kde-l10n-cavalencia (<< 4:16.04.3-6~), kde-l10n-cs (<< 4:16.04.3-6~), kde-l10n-da (<< 4:16.04.3-6~), kde-l10n-de (<< 4:16.04.3-6~), kde-l10n-el (<< 4:16.04.3-6~), kde-l10n-engb (<< 4:16.04.3-6~), kde-l10n-eo (<< 4:16.04.3-6~), kde-l10n-es (<< 4:16.04.3-6~), kde-l10n-et (<< 4:16.04.3-6~), kde-l10n-eu (<< 4:16.04.3-6~), kde-l10n-fa (<< 4:16.04.3-6~), kde-l10n-fi (<< 4:16.04.3-6~), kde-l10n-fr (<< 4:16.04.3-6~), kde-l10n-ga (<< 4:16.04.3-6~), kde-l10n-gl (<< 4:16.04.3-6~), kde-l10n-he (<< 4:16.04.3-6~), kde-l10n-hi (<< 4:16.04.3-6~), kde-l10n-hr (<< 4:16.04.3-6~), kde-l10n-hu (<< 4:16.04.3-6~), kde-l10n-ia (<< 4:16.04.3-6~), kde-l10n-id (<< 4:16.04.3-6~), kde-l10n-is (<< 4:16.04.3-6~), kde-l10n-it (<< 4:16.04.3-6~), kde-l10n-ja (<< 4:16.04.3-6~), kde-l10n-kk (<< 4:16.04.3-6~), kde-l10n-km (<< 4:16.04.3-6~), kde-l10n-ko (<< 4:16.04.3-6~), kde-l10n-lt (<< 4:16.04.3-6~), kde-l10n-lv (<< 4:16.04.3-6~), kde-l10n-mr (<< 4:16.04.3-6~), kde-l10n-nb (<< 4:16.04.3-6~), kde-l10n-nds (<< 4:16.04.3-6~), kde-l10n-nl (<< 4:16.04.3-6~), kde-l10n-nn (<< 4:16.04.3-6~), kde-l10n-pa (<< 4:16.04.3-6~), kde-l10n-pl (<< 4:16.04.3-6~), kde-l10n-pt (<< 4:16.04.3-6~), kde-l10n-ptbr (<< 4:16.04.3-6~), kde-l10n-ro (<< 4:16.04.3-6~), kde-l10n-ru (<< 4:16.04.3-6~), kde-l10n-sk (<< 4:16.04.3-6~), kde-l10n-sl (<< 4:16.04.3-6~), kde-l10n-sr (<< 4:16.04.3-6~), kde-l10n-sv (<< 4:16.04.3-6~), kde-l10n-tr (<< 4:16.04.3-6~), kde-l10n-ug (<< 4:16.04.3-6~), kde-l10n-uk (<< 4:16.04.3-6~), kde-l10n-wa (<< 4:16.04.3-6~), kde-l10n-zhcn (<< 4:16.04.3-6~), kde-l10n-zhtw (<< 4:16.04.3-6~) Homepage: http://www.kde.org/ Task: kubuntu-desktop Download-Size: 746 kB APT-Manual-Installed: yes APT-Sources: http://ports.ubuntu.com/ubuntu-ports focal/universe arm64 Packages Description: KDE终端模拟器 Konsole 是一个建立在 KDE 平台上的终端模拟器。它可以在单窗口内使用可分离标签 打开多个终端会话。 . Konsole 支持多种强大的终端功能，如色彩方案定制、会话保存和输出监控。```

As I already said, QtWidgets has never been intended to work with mobile devices. So knowing the history of Qt, knowing why QtQuick has been created ... I wouldn't expect this bug to be addressed.

Not solved in 6.8 :(

Not solved in 6.8 :(

HA ! then you must verify that the version code is different for the archs and with each release higher take a look at my pages HowTo do this for CMake: https://t1p.de/ekkeCMakeAndroid for QMake: see in this example: https://github.com/ekke/c2gQtWS_x/blob/master/c2gQtWS_x.pro

easiest way is to use an empty folder for 'Android SDK Location' and hit 'Set Up SDK'. QtCreator will download all what's needed

@Axel-Spoerl Thanks, this is very helpful. I have been putting off the upgrade to 6, so time to just get it done.

One other option is to rebuild the ffmpeg backend (just it) with your system provided librairies.

There is nothing general in the docs, that would say: This is faster, because…. Qt 6 follows a general trend: Use more caching for the sake of speed. There were some optimisations in container classes and string views. We fixed a mem leak in the Quick pixmap cache. The downside of more caching, in other words higher memory consumption, is that older memory constrained setups (mainly embedded) need to swap out and actually become slower. But I guess that’s not a Qt specific phenomenon. All frameworks and other tools I use on a daily basis, have increased their appetite for memory as RAM becomes cheaper and larger.

Solution found... in android manifest, in <application> i must deactivate enableOnBackInvokedCallback, so correct is: android:enableOnBackInvokedCallback="false" from this point, all works as expected seems as new thing from android 13 according to google search