Qt Virtualkeyboard example

Johannes Kliemann Johannes.Kliemann at ...250...
Wed Aug 9 09:58:51 CEST 2017

Hi Christian,

I tried to build the plugin statically but that seems to depend on
static builds of its dependencies (which wouldn't be a big problem) and
the QtQuick2 plugin itself.

I recreated the directory structure from Linux
(qml/QtQuick/VirtualKeyboard/qmldir) but it still fails to find the
plugin. Even if dynamically loading it is a problem, shouldn't Qt find
the plugin first and then fail to load it?


Am 02.08.2017 um 19:27 schrieb Christian Prochaska:
> Hi Johannes,
> On 31.07.2017 15:20, Johannes Kliemann wrote:
>> after applying your commit and fixing the vpaths for the plugin
>> directory it compiles but it still fails to find the
>> qtvirtualkeyboardplugin.
> from looking at what gets built and installed with Qt for Linux, it
> seems there are actually multiple plugins involved that need to be
> ported to Genode: one Qt plugin (the one you ported) and multiple
> QtQuick plugins (QtQuick.Layouts, QtQuick.Virtualkeyboard.Styles,
> Qt.labs.folderlistmodel). The layout of the 'qml' directory must
> probably match the one on Linux (/usr/local/Qt-5.8.0/qml), with a
> 'qmldir' file in each sub directory, for the QtQuick plugins to be
> found. The Qt plugin was installed at
> '/usr/local/Qt-5.8.0/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so'
> on Linux, but I'm not sure if our Qt port can load non-QtQuick plugins
> with 'dlopen()' yet, so I would first try to use it as a static plugin,
> like it is done with the qjpeg plugin. This usually means adding an
> extra file to register the plugin at program start (see
> 'repos/libports/src/lib/qt5/qtbase/src/plugins/imageformats/jpeg/import_plugin.cc').
> Regards,
> Christian
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