qtvirtualkeyboard Chinese word candidate list on embedded linux

william6849

Hello,

I have been ported QT 5.11.3 to my own embedded linux platform, based on ARM v7a chip.

This is running on windowns7 created by QTCreator 4.9.2 , with QT 5.11.3.
I can select the word what i need from upside candidate list.
alt text

But when I compile and run it on my embedded system, select bar won't appear after i typed the spell.
alt text

this is my code:

.pro

QT += quick qml

CONFIG += c++11



QTPLUGIN+=qtvirtualkeyboardplugin


QT+=svg

QT_IM_MODULE=qtvirtualkeyboard myapp


# The following define makes your compiler emit warnings if you use

# any Qt feature that has been marked deprecated (the exact warnings

# depend on your compiler). Refer to the documentation for the

# deprecated API to know how to port your code away from it.

DEFINES += QT_DEPRECATED_WARNINGS



# You can also make your code fail to compile if it uses deprecated APIs.

# In order to do so, uncomment the following line.

# You can also select to disable deprecated APIs only up to a certain version of Qt.

#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0



SOURCES += \

        main.cpp



RESOURCES += qml.qrc



# Additional import path used to resolve QML modules in Qt Creator's code model

QML_IMPORT_PATH =



# Additional import path used to resolve QML modules just for Qt Quick Designer

QML_DESIGNER_IMPORT_PATH =



# Default rules for deployment.

qnx: target.path = /tmp/$${TARGET}/bin

else: unix:!android: target.path = /opt/$${TARGET}/bin

!isEmpty(target.path): INSTALLS += target

main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QFont>

int main(int argc, char *argv[])

{
    QFont font; 
    font.setPointSize(10);
    font.setFamily("MSJH"); 

    qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    app.setFont(font);

    QQmlApplicationEngine engine;

    const QUrl url(QStringLiteral("qrc:/main.qml"));

    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,

                     &app, [url](QObject *obj, const QUrl &objUrl) {

        if (!obj && url == objUrl)

            QCoreApplication::exit(-1);

    }, Qt::QueuedConnection);

    engine.load(url);



    return app.exec();

}

main.qml

import QtQuick 2.10
import QtQuick.Window 2.10
import QtQuick.Controls 2.2
import QtQuick.VirtualKeyboard 2.3

Window {
    width:1024
    height: 600
    id:root
    visible:true
    Rectangle{
        anchors.fill:parent
    }
    TextField{
        id:key
        anchors.top: parent.top
        anchors.horizontalCenter: parent.horizontalCenter
	anchors.bottom: InputPanel.top
        focus:true
    }
    InputPanel{
        id:vkb
        visible:true
        active:true
        anchors.fill:parent
    	anchors.left: parent.left
        anchors.right: parent.right
    }
}

configuration when cross compile QT5.11.3

./configure 
-release 
-sysroot /home/admin/Desktop/file_partition/sysroot 
-prefix /release -extprefix /home/admin/Desktop/file_partition/release_11_3 
-opensource
-make libs 
-xplatform linux-arm-gnueabi-g++ 
-no-pch -qt-libjpeg 
-no-opengl 
-skip qt3d 
-skip qtcanvas3d 
-skip qtpurchasing
-no-sse2 -no-openssl 
-no-iconv 
-nomake examples 
-skip qtserialbus 
-evdev
-I/home/admin/Desktop/qtsource/corssbin/ts_release/include 
-L/home/admin/Desktop/qtsource/corssbin/ts_release/lib 
-make libs

included parts

Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
Building for: linux-arm-gnueabi-g++ (arm, CPU features: <none>)
Configuration: cross_compile compile_examples enable_new_dtags largefile shared rpath release c++11 c++14 concurrent dbus reduce_exports stl
Build options:
  Mode ................................... release
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C++ standard ..................... C++14
  Using ccache ........................... no
  Using gold linker ...................... no
  Using new DTAGS ........................ yes
  Using precompiled headers .............. no
  Using LTCG ............................. no
  Target compiler supports:
    NEON ................................. no
  Build parts ............................ libs libs
Qt modules and options:
  Qt Concurrent .......................... yes
  Qt D-Bus ............................... yes
  Qt D-Bus directly linked to libdbus .... yes
  Qt Gui ................................. yes
  Qt Network ............................. yes
  Qt Sql ................................. yes
  Qt Testlib ............................. yes
  Qt Widgets ............................. yes
  Qt Xml ................................. yes
Support enabled for:
  Using pkg-config ....................... yes
  udev ................................... yes
  Using system zlib ...................... yes
Qt Core:
  DoubleConversion ....................... yes
    Using system DoubleConversion ........ no
  GLib ................................... yes
  iconv .................................. no
  ICU .................................... yes
  Tracing backend ........................ <none>
  Logging backends:
    journald ............................. no
    syslog ............................... no
    slog2 ................................ no
  Using system PCRE2 ..................... no
Qt Network:
  getifaddrs() ........................... yes
  IPv6 ifname ............................ yes
  libproxy ............................... no
  Linux AF_NETLINK ....................... no
  OpenSSL ................................ no
    Qt directly linked to OpenSSL ........ no
  OpenSSL 1.1 ............................ no
  SCTP ................................... no
  Use system proxies ..................... yes
Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
    Using system FreeType ................ yes
  HarfBuzz ............................... yes
    Using system HarfBuzz ................ no
  Fontconfig ............................. yes
  Image formats:
    GIF .................................. yes
    ICO .................................. yes
    JPEG ................................. yes
      Using system libjpeg ............... no
    PNG .................................. yes
      Using system libpng ................ yes
  EGL .................................... no
  OpenVG ................................. no
  OpenGL:
    Desktop OpenGL ....................... no
    OpenGL ES 2.0 ........................ no
    OpenGL ES 3.0 ........................ no
    OpenGL ES 3.1 ........................ no
    OpenGL ES 3.2 ........................ no
  Vulkan ................................. no
  Session Management ..................... yes
Features used by QPA backends:
  evdev .................................. yes
  libinput ............................... no
  INTEGRITY HID .......................... no
  mtdev .................................. no
  tslib .................................. yes
  xkbcommon-evdev ........................ no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. no
  LinuxFB ................................ yes
  VNC .................................... yes
  Mir client ............................. no
Qt Widgets:
  GTK+ ................................... no
  Styles ................................. Fusion Windows
Qt PrintSupport:
  CUPS ................................... no
Qt Sql:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... no
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no
Qt Testlib:
  Tester for item models ................. yes
QtXmlPatterns:
  XML schema support ..................... yes
Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML delegate model ..................... yes
Qt Quick:
  Direct3D 12 ............................ no
  AnimatedImage item ..................... yes
  Canvas item ............................ yes
  Support for Qt Quick Designer .......... yes
  Flipable item .......................... yes
  GridView item .......................... yes
  ListView item .......................... yes
  Path support ........................... yes
  PathView item .......................... yes
  Positioner items ....................... yes
  Repeater item .......................... yes
  ShaderEffect item ...................... yes
  Sprite item ............................ yes
Qt Gamepad:
  SDL2 ................................... no
Qt Wayland Client ........................ no
Qt Wayland Compositor .................... no
Qt Bluetooth:
  BlueZ .................................. yes
  BlueZ Low Energy ....................... yes
  Linux Crypto API ....................... yes
  WinRT Bluetooth API (desktop & UWP) .... no
Qt Sensors:
  sensorfw ............................... no
Qt Quick Controls 2:
  Styles ................................. Default Fusion Imagine Material Universal
Qt Quick Templates 2:
  Hover support .......................... yes
  Multi-touch support .................... yes
Qt Positioning:
  Gypsy GPS Daemon ....................... no
  WinRT Geolocation API .................. no
Qt Location:
  Qt.labs.location experimental QML plugin . yes
  Geoservice plugins:
    OpenStreetMap ........................ yes
    HERE ................................. yes
    Esri ................................. yes
    Mapbox ............................... yes
    MapboxGL ............................. no
    Itemsoverlay ......................... yes
Qt Multimedia:
  ALSA ................................... yes
  GStreamer 1.0 .......................... no
  GStreamer 0.10 ......................... yes
  Video for Linux ........................ yes
  OpenAL ................................. no
  PulseAudio ............................. no
  Resource Policy (libresourceqt5) ....... no
  Windows Audio Services ................. no
  DirectShow ............................. no
  Windows Media Foundation ............... no
Qt WebEngine:
  Embedded build ......................... yes
  Pepper Plugins ......................... no
  Printing and PDF ....................... no
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  Native Spellchecker .................... no
  WebRTC ................................. no
  Use System Ninja ....................... no
  Geolocation ............................ yes
  Use v8 snapshot ........................ yes
  Building v8 snapshot supported ......... no
  Use ALSA ............................... yes
  Use PulseAudio ......................... no
  Optional system libraries used:
    re2 .................................. no
    icu .................................. no
    libwebp, libwebpmux and libwebpdemux . no
    opus ................................. no
    ffmpeg ............................... no
    libvpx ............................... no
    snappy ............................... no
    libsrtp .............................. no
    glib ................................. yes
    zlib ................................. yes
    minizip .............................. no
    libevent ............................. no
    jsoncpp .............................. no
    protobuf ............................. no
    libxml2 and libxslt .................. no
    lcms2 ................................ no
    png .................................. yes
    JPEG ................................. no
    harfbuzz ............................. no
    freetype ............................. yes
  Required system libraries:
    fontconfig ........................... yes
    dbus ................................. yes
    nss .................................. no
    khr .................................. no
    glibc ................................ yes
  Required system libraries for qpa-xcb:
    libdrm ............................... no
    xcomposite ........................... no
    xcursor .............................. no
    xi ................................... no
    xrandr ............................... no
    xtst ................................. no

platform environment before executing programe.


export LD_LIBRARY_PATH='/emmc/ts_lib/lib:/emmc/qt_dir/lib:/emmc/qt_dir/plugins/platforms:/lib:/usr/lib:/usr/local/lib'
export PATH='/usr/bin:/bin:/usr/sbin:/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin'

export QT_ROOT='/emmc/qt_dir'
export QML2_IMPORT_PATH='/emmc/qt_dir/qml'
export QML_IMPORT_PATH='/emmc/qt_dir/qml'
export QT_DEBUG_PLUGINS='1'
export QT_IM_MODULE='qtvirtualkeyboard'
export QT_PLUGIN_PATH='/emmc/qt_dir/plugins'

export QT_QPA_FB_DRM='2'
export QT_QPA_FB_TSLIB='1'
export QT_QPA_FONTDIR='/emmc/qt_dir/lib/fonts'
export QT_QPA_GENERIC_PLUGINS='tslib'
export QT_QPA_PLATFORM='linuxfb:fb=/dev/fb0'
export QT_QPA_PLATFORM_PLUGIN_PATH='/emmc/qt_dir/plugins/platforms'

export QT_VIRTUALKEYBOARD_PINYIN_DICTIONARY='/emmc/qt_dir/qtvirtualkeyboard/pinyin/dict_pinyin.dat'
export QT_VIRTUALKEYBOARD_ZHUYIN_DICTIONARY='/emmc/qt_dir/qtvirtualkeyboard/tcime/dict_zhuyin.dat'
export TSLIB_CONFFILE='/emmc/ts_lib/etc/ts.conf'
export TSLIB_CONSOLEDEVICE='none'
export TSLIB_FBDEVICE='/dev/fb0'
export TSLIB_PLUGINDIR='/emmc/ts_lib/lib/ts'
export TSLIB_ROOT='/emmc/ts_lib'
export TSLIB_TSDEVICE='/dev/input/event2'

checked DICTIONARY file ,it's exist.

debug information

QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /emmc/qt_dir/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqminimal.so"
Found metadata in lib /emmc/qt_dir/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqoffscreen.so"
Found metadata in lib /emmc/qt_dir/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqvnc.so"
Found metadata in lib /emmc/qt_dir/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqlinuxfb.so"
Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqminimal.so"
Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqoffscreen.so"
Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforms/libqvnc.so"
Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/platforms" ...
loaded library "/emmc/qt_dir/plugins/platforms/libqlinuxfb.so"
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/platforminputcontexts" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforminputcontexts" ...
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "ibus"
        ]
    },
    "className": "QIbusPlatformInputContextPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("ibus")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QPlatformInputContextFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "qtvirtualkeyboard"
        ]
    },
    "className": "QVirtualKeyboardPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("qtvirtualkeyboard")
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/platforminputcontexts" ...
loaded library "/emmc/qt_dir/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so"
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/generic" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/generic" ...
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqevdevkeyboardplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqevdevkeyboardplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevKeyboard"
        ]
    },
    "className": "QEvdevKeyboardPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("evdevkeyboard")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqevdevmouseplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqevdevmouseplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevMouse"
        ]
    },
    "className": "QEvdevMousePlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("evdevmouse")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqevdevtabletplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqevdevtabletplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTablet"
        ]
    },
    "className": "QEvdevTabletPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("evdevtablet")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqevdevtouchplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqevdevtouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTouch"
        ]
    },
    "className": "QEvdevTouchScreenPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("evdevtouch")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqtslibplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqtslibplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "Tslib",
            "TslibRaw"
        ]
    },
    "className": "QTsLibPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("tslib", "tslibraw")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/generic/libqtuiotouchplugin.so"
Found metadata in lib /emmc/qt_dir/plugins/generic/libqtuiotouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "TuioTouch"
        ]
    },
    "className": "QTuioTouchPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("tuiotouch")
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/generic" ...
loaded library "/emmc/qt_dir/plugins/generic/libqtslibplugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick.2/libqtquick2plugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuick2Plugin",
    "debug": false,
    "uri": [
        "QtQuick.2"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick.2/libqtquick2plugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick/Window.2/libwindowplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuick2WindowPlugin",
    "debug": false,
    "uri": [
        "QtQuick.Window.2"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick/Window.2/libwindowplugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick/Controls.2/libqtquickcontrols2plugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuickControls2Plugin",
    "debug": false,
    "uri": [
        "QtQuick.Controls.2"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick/Controls.2/libqtquickcontrols2plugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuickTemplates2Plugin",
    "debug": false,
    "uri": [
        "QtQuick.Templates.2"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick/Layouts/libqquicklayoutsplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuickLayoutsPlugin",
    "debug": false,
    "uri": [
        "QtQuick.Layouts"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick/Layouts/libqquicklayoutsplugin.so"
Found metadata in lib /emmc/qt_dir/qml/QtQuick/VirtualKeyboard/Styles/libqtvirtualkeyboardstylesplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtVirtualKeyboardStylesPlugin",
    "debug": false,
    "uri": [
        "QtQuick.VirtualKeyboard.Styles"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/QtQuick/VirtualKeyboard/Styles/libqtvirtualkeyboardstylesplugin.so"
Found metadata in lib /emmc/qt_dir/qml/Qt/labs/folderlistmodel/libqmlfolderlistmodelplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QmlFolderListModelPlugin",
    "debug": false,
    "uri": [
        "Qt.labs.folderlistmodel"
    ],
    "version": 330499
}


loaded library "/emmc/qt_dir/qml/Qt/labs/folderlistmodel/libqmlfolderlistmodelplugin.so"
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/imageformats" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/imageformats" ...
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqgif.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqgif.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "gif"
        ],
        "MimeTypes": [
            "image/gif"
        ]
    },
    "className": "QGifPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("gif")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqicns.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqicns.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "icns"
        ],
        "MimeTypes": [
            "image/x-icns"
        ]
    },
    "className": "QICNSPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("icns")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqico.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqico.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "ico",
            "cur"
        ],
        "MimeTypes": [
            "image/vnd.microsoft.icon",
            "image/vnd.microsoft.icon"
        ]
    },
    "className": "QICOPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("ico", "cur")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqjpeg.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqjpeg.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "jpg",
            "jpeg"
        ],
        "MimeTypes": [
            "image/jpeg",
            "image/jpeg"
        ]
    },
    "className": "QJpegPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("jpg", "jpeg")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqsvg.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqsvg.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "svg",
            "svgz"
        ],
        "MimeTypes": [
            "image/svg+xml",
            "image/svg+xml-compressed"
        ]
    },
    "className": "QSvgPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("svg", "svgz")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqtga.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqtga.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tga"
        ],
        "MimeTypes": [
            "image/x-tga"
        ]
    },
    "className": "QTgaPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("tga")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqtiff.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqtiff.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tiff",
            "tif"
        ],
        "MimeTypes": [
            "image/tiff",
            "image/tiff"
        ]
    },
    "className": "QTiffPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("tiff", "tif")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqwbmp.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqwbmp.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "wbmp"
        ],
        "MimeTypes": [
            "image/vnd.wap.wbmp"
        ]
    },
    "className": "QWbmpPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("wbmp")
QFactoryLoader::QFactoryLoader() looking at "/emmc/qt_dir/plugins/imageformats/libqwebp.so"
Found metadata in lib /emmc/qt_dir/plugins/imageformats/libqwebp.so, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "webp"
        ],
        "MimeTypes": [
            "image/webp"
        ]
    },
    "className": "QWebpPlugin",
    "debug": false,
    "version": 330499
}


Got keys from plugin meta data ("webp")
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/imageformats" ...
loaded library "/emmc/qt_dir/plugins/imageformats/libqgif.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqicns.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqico.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqjpeg.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqsvg.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqtga.so"
Cannot load library /emmc/qt_dir/plugins/imageformats/libqtiff.so: (libtiff.so.5: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/emmc/qt_dir/plugins/imageformats/libqtiff.so" : "Cannot load library /emmc/qt_dir/plugins/imageformats/libqtiff.so: (libtiff.so.5: cannot open shared object file: No such file or directory)"
loaded library "/emmc/qt_dir/plugins/imageformats/libqwbmp.so"
loaded library "/emmc/qt_dir/plugins/imageformats/libqwebp.so"
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/platforms/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "/emmc/qt_dir/plugins/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "/root/qts/accessible" ...

william6849

I tryed to use

QtQuick.VirtualKeyboard.Settings 2.2

set variable.

wordCandidateList.alwaysVisible = true

it shows candidate list rectangle now, but still empty, no any candidate appear.

william6849

I found that Japaneese Kanji work normally, maybe it's chinese dictionary problem.

william6849

Hello guys.
I solved the problem.

It's because of dictionary path compiled as absolute prefix path.

I checked the source code,
qtvirtualkeyboard\src\virtualkeyboard\tcinputmethod.cpp

382        if (inputMode == InputEngine::Zhuyin) {
383            if (d->zhuyinDictionary.isEmpty()) {
384                QString zhuyinDictionary(qEnvironmentVariable("QT_VIRTUALKEYBOARD_ZHUYIN_DICTIONARY"));
385                if (zhuyinDictionary.isEmpty())
386                    zhuyinDictionary = QLibraryInfo::location(QLibraryInfo::DataPath) + "/qtvirtualkeyboard/tcime/dict_zhuyin.dat";
387                d->zhuyinDictionary.load(zhuyinDictionary);
388            }
389            d->wordDictionary = &d->zhuyinDictionary;
390        }

Line 386 :
It used QLibraryInfo, the datapath equals prefix path .

I am not expert in QT, but in this case it is not related by qt path on my platform,
I thought the path should be "$QT_ROOT/prefix".
But actually , it used "/prefix" as absolute path.
So I have to move the dictionary file to "/prefix/qtvirtualkeyboard/tcime/dict_zhuyin.dat"
instead of "&QT_ROOT/prefix/qtvirtualkeyboard/tcime/dict_zhuyin.dat"

that's why Japanese work fine, because it implemented without external dictionary.

Is this a bug ? Or just my misunderstanding of QT.

SGaist

Hi and welcome to devnet,

What is the code for the working dictionary ?

william6849

@sgaist
I changed enum QLibraryInfo::LibraryLocationtype.
from QLibraryInfo::DataPath to QLibraryInfo::PluginsPath ,
also moved qtvirtualkeyboard folder from / to QT_PLUGIN_PATH/ .

382        if (inputMode == InputEngine::Zhuyin) {
383            if (d->zhuyinDictionary.isEmpty()) {
384                QString zhuyinDictionary(qEnvironmentVariable("QT_VIRTUALKEYBOARD_ZHUYIN_DICTIONARY"));
385                if (zhuyinDictionary.isEmpty())
386                    zhuyinDictionary = QLibraryInfo::location(QLibraryInfo::PluginsPath) + "/qtvirtualkeyboard/tcime/dict_zhuyin.dat";
387                d->zhuyinDictionary.load(zhuyinDictionary);
388            }
389            d->wordDictionary = &d->zhuyinDictionary;
390        }

I checked this:
Qt Virtual Keyboard Deployment Guide

It said:

For example, for Qt libraries built from source, it could be qtbase/qtvirtualkeyboard/tcime/dict_zhuyin.dat.

It was,but for embeded system, we won't provide QTBASE envirement variable, made this is not really portable ,
but we'll set QT_PLUGIN_PATH, that's why I made the change;

And this,
enum QLibraryInfo::LibraryLocation
says,

QLibraryInfo::DataPath	:The location of general `architecture-independent` Qt data.

Truely cause me misunderstanding. I don't know this is meaning absolute or portable.

SGaist

Thanks for the info