qt - Dynamically change Images when current locale changed -


the interface of simple video player, consists of video , image items, blended blend qtgraphicaleffects. image has associated mousearea , translucent graphical buttons "hardcoded" text in english. default images provided qquickimageprovider following locations:

import qtqml 2.2  import qtquick 2.9 import qtmultimedia 5.9  import qtgraphicaleffects 1.0  blend {     id: blender      mode: "normal"      property alias playbackstate: video.playbackstate      onvisiblechanged: {         if (!visible) {             video.playlist.clear()         }     }      source: video {         id: video          visible: false          width: blender.width         height: blender.height          fillmode: videooutput.stretch          playlist: playlist {             onerrorchanged: {                 if (error() !== playlist.noerror) {                     console.log("error: %1 (%2)".arg(error()).arg(errorstring()))                     video.stop()                 }             }              function nextinloop() {                 currentindex = (currentindex + itemcount + 1) % itemcount             }              function previousinloop() {                 currentindex = (currentindex + itemcount - 1) % itemcount             }         }          connections {             target: videoplayersingleton             onsetplaylist: {                 if (video.playlist.clear()) {                     if (video.playlist.additems(playlist)) {                         if (index < 0) {                             video.playlist.playbackmode = playlist.random                         } else {                             video.playlist.currentindex = index                             video.playlist.playbackmode = playlist.sequential                         }                         video.play()                     }                 }             }         }          autoplay: true         loops: mediaplayer.infinite     }      foregroundsource: image {         visible: false          width: blender.width         height: blender.height          sourcesize: qt.size(width, height)         source: {             switch (playbackstate) {             case mediaplayer.playingstate : return "image://videoplayer/pause"             case mediaplayer.pausedstate : return "image://videoplayer/play"             case mediaplayer.stoppedstate : return "image://videoplayer/logo"             }         }         smooth: true     }      mousearea {         anchors.fill: parent          readonly property rect previousbutton: qt.rect((130 - 40) / 1920, (505 - 40) / 1080, 80 / 1920, 80 / 1080)         readonly property rect nextbutton: qt.rect((1800 - 40) / 1920, (505 - 40) / 1080, 80 / 1920, 80 / 1080)         readonly property rect playpausebutton: qt.rect((950 - 40) / 1920, (980 - 40) / 1080, 80 / 1920, 80 / 1080)         readonly property rect backtocatalogbutton: qt.rect((1510 - 40) / 1920, (980 - 40) / 1080, 80 / 1920, 80 / 1080)         readonly property rect opencollectionbutton: qt.rect((1710 - 40) / 1920, (980 - 40) / 1080, 80 / 1920, 80 / 1080)          onclicked: {             var hit = qt.point(mouse.x / width, mouse.y / height)             if (videoplayersingleton.contains(previousbutton, hit)) {                 video.playlist.previousinloop()             } else if (videoplayersingleton.contains(nextbutton, hit)) {                 video.playlist.nextinloop()             } else if (videoplayersingleton.contains(playpausebutton, hit)) {                 if (playbackstate === mediaplayer.playingstate) {                     video.pause()                 } else {                     video.play()                 }             } else if (videoplayersingleton.contains(backtocatalogbutton, hit)) {                 videoplayersingleton.backtocatalog(video.playlist.currentindex)             } else if (videoplayersingleton.contains(opencollectionbutton, hit)) {                 videoplayersingleton.opencollection(video.playlist.currentindex)             }         }     } }

there corresponding images in +ru_ru/ subfolder resources.

c++ qobject singletone global context may have signal void languagechanged(qlocale locale);, emitted, when qtranslators replaced in qcoreapplication::removetranslator/installtranslator each of loaded resource.

// i18n.hpp:  #pragma once  #include <qtcore>  q_declare_logging_category(i18ncategory)  #ifndef project_default_locale #define project_default_locale "ru_ru" #endif  class internationalization         : public qobject {      q_object      static qmutex mutex;     static internationalization * self;      explicit internationalization(qstring projectname = qstringliteral(project_name));  public :      static     internationalization * instance()     {         q_assert(qapp);         qmutexlocker lock{&mutex};         if (!self) {             self = ::new internationalization;         }         return self;     }      void setdependencies(qstringlist dependencies);  public q_slots :      void load(qlocale locale = qstringliteral(project_default_locale));  q_signals :      void abouttolanguagechanged();     void languagechanged(qlocale locale);  private :      qstringlist translations;     qlist< qpointer< qtranslator > > translators;  };  #define i18n internationalization::instance()  // i18n.cpp:  #include "i18n.hpp"  q_logging_category(i18ncategory, "internationalization")  qmutex internationalization::mutex; internationalization * internationalization::self = q_nullptr;  internationalization::internationalization(qstring projectname)     : qobject{qapp} {     translations.prepend(projectname);     translations.prepend(project_name); }  void internationalization::setdependencies(qstringlist dependencies) {     translations << dependencies; }  void internationalization::load(qlocale locale) {     // get_target_property(qt_qmake_executable qt5::qmake imported_location)     // qmake -query qt_install_translations     q_assert(!(translators.size() > translations.size()));     while (translators.size() < translations.size()) {         translators << ::new qtranslator{qapp};     }     q_emit abouttolanguagechanged();     qlocale::setdefault(locale);     qmutablelistiterator translator{translators};     (const auto translation : translations) {         q_assert(translator.hasnext());         const auto t = translator.next();         if (!qcoreapplication::removetranslator(t)) {             if (!t->isempty()) {                 qcdebug(i18ncategory).noquote()                         << tr("unable remove translation project %1")                            .arg(translation);             }         }         if (t->load(locale, translation, ".", ":/i18n")) {             if (!qcoreapplication::installtranslator(t)) {                 qcdebug(i18ncategory).noquote()                         << tr("unable install translation %1 locale project %2")                            .arg(locale.name(), translation);             }         } else {             qcdebug(i18ncategory).noquote()                     << tr("unable load translation %1 locale project %2")                        .arg(locale.name(), translation);         }     }     q_emit languagechanged(locale); }

i want change locations of images on signal emitted along locale changing. possible change selected files @ runtime (i.e. w/o recreating of parent item, contains videoplayer)?

connected question: affected file selectors first: qimagereader's filepaths used internally qquickimageprovider or source: of quick's image? latter derived first. or maybe both?


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