0.7.10: cambio lingua in due mosse + diagnosi lingua nel /layout

Misurato in container: la ricarica della radice ri-traduce, il catalogo si trova
anche con it_IT. La ricarica ora scarica la radice prima di ricaricarla, cosi'
non dipende da un comportamento di setSource che cambia fra versioni di Qt.

docs/PIANO.md

@@ -600,7 +600,32 @@ la domanda "cos'è la striscia bianca sotto l'acqua calda?").
 Regola: un indicatore permanente che resta sempre allo stesso valore è rumore.
 Se un giorno servisse, va ancorato a qualcosa che cambia davvero.
 
-## 21. Conseguenze dell'uso reale (0.7.0)
+## 22. Il cambio lingua — v0.7.10
+
+Carlo: *"Tutto perfetto. Solo il cambio lingua non sembra funzionare"*.
+
+Misurato invece che dedotto, con un banco vero in container (Qt 5.15, non 5.6:
+differenza che conta). Esiti:
+
+1. installare il traduttore **non** ri-traduce le stringhe gia' a schermo
+   (conferma: Qt 5.6 non ha `retranslate()`);
+2. `setSource()` con la **stessa** url **ri-traduce** (House -> Casa): la
+   tecnica dell'app e' quella giusta;
+3. il catalogo si trova **anche** con locale `it_IT`: `load()` ripiega sul nome
+   accorciato `it`; e nel pacchetto sta in
+   `/usr/share/harbour-aira/translations/harbour-aira-it.qm`, la cartella che
+   l'app cerca.
+
+Restava un'unica differenza fra banco e telefono: la versione di Qt. La
+ricarica si affidava a un comportamento di `setSource(stessa url)` che cambia
+fra versioni, quindi ora si fa in due mosse — radice scaricata con url vuota,
+poi ricaricata: cosi' il componente **deve** essere ricreato, su qualunque Qt.
+
+E per non indovinare piu': la Home manda al `/layout` anche `lingua`, `locale` e
+`catalogo`, cosi' il registro del bridge dice cosa sta usando davvero il
+telefono.
+
+## 23. Conseguenze dell'uso reale (0.7.0)
 
 Deciso con l'uso, non in anticipo:
 

qml/pages/MainPage.qml

@@ -400,7 +400,12 @@ Page {
                     "versione": appVersion,
                     "schermo": Math.round(height),
                     "contenuto": Math.round(flick.contentHeight),
-                    "righe": righe
+                    "righe": righe,
+                    // Diagnostica della lingua: con che scelta, che locale e che
+                    // catalogo sta girando l'app in questo momento.
+                    "lingua": translator.language === "" ? "sistema" : translator.language,
+                    "locale": translator.localeName,
+                    "catalogo": translator.catalogLoaded
                 })
         }
     }

rpm/harbour-aira.spec

@@ -1,6 +1,6 @@
 Name:       harbour-aira
 Summary:    Control your Aira heat pump through a local bridge
-Version:    0.7.9
+Version:    0.7.10
 Release:    1
 Group:      Qt/Qt
 License:    MIT
@@ -37,6 +37,12 @@ Address and token of the bridge live in the app settings (AppConfigLocation);
 no personal data is stored in the binary.
 
 %changelog
+* Sun Oct 11 2026 Carlo <carlo@carlobaratto.it> - 0.7.10-1
+- cambio lingua: la ricarica della radice QML ora e' in due mosse (url vuota,
+  poi ricarica), cosi' il componente viene ricreato su qualunque versione di Qt
+  invece di affidarsi a un comportamento che cambia fra versioni.
+- diagnosi: la Home manda al /layout anche lingua, locale e catalogo, perche'
+  un difetto di lingua sul telefono si possa leggere invece che indovinare.
 * Sun Oct 11 2026 Carlo <carlo@carlobaratto.it> - 0.7.9-1
 - via la barra di avanzamento sotto l'acqua calda: partiva da 10 °C e stava
   sempre al 99%, quindi non diceva niente. Tolta dal componente ReadingCell

src/main.cpp

@@ -21,7 +21,7 @@ Q_DECL_EXPORT int main(int argc, char *argv[])
 
     app->setOrganizationName(QStringLiteral("harbour"));
     app->setApplicationName(QStringLiteral("aira"));
-    app->setApplicationVersion(QStringLiteral("0.7.9"));
+    app->setApplicationVersion(QStringLiteral("0.7.10"));
 
     Settings settings;
     ApiClient api(&settings);
@@ -36,7 +36,7 @@ Q_DECL_EXPORT int main(int argc, char *argv[])
 
     // Prima riga del log: dice subito se il device sta girando la build nuova
     // o una stale (trappola nota del build engine).
-    qDebug() << "harbour-aira v0.7.9 build" << __DATE__ << __TIME__;
+    qDebug() << "harbour-aira v0.7.10 build" << __DATE__ << __TIME__;
 
     view->rootContext()->setContextProperty(QStringLiteral("appSettings"), &settings);
     view->rootContext()->setContextProperty(QStringLiteral("api"), &api);
@@ -52,12 +52,14 @@ Q_DECL_EXPORT int main(int argc, char *argv[])
     // scelta nelle impostazioni si applica ricaricando la radice QML. Conseguenza
     // voluta e attesa: si torna alla home, nella lingua nuova.
     //
-    // setSource() con la STESSA url ricrea davvero il componente: in Qt 5.6
-    // QQuickViewPrivate::execute() cancella root e component e ne costruisce uno
-    // nuovo (documentato: "the QML component being instantiated, even if the URL
-    // is unchanged"), quindi ogni qsTr() viene rivalutato. Non serve
-    // clearComponentCache(): i valori delle stringhe non stanno nella cache.
+    // La ricarica si fa in DUE mosse: prima si scarica la radice (url vuota), poi
+    // si ricarica. Una sola setSource con la STESSA url e' un comportamento che
+    // cambia fra le versioni di Qt (misurato su Qt 5.15: ricrea; su 5.6 non e'
+    // garantito) e il telefono non e' la macchina su cui si prova. Con l'url vuota
+    // il componente e' per forza ricreato, quindi ogni qsTr() viene rivalutato.
+    // Non serve clearComponentCache(): le stringhe non stanno nella cache.
     QObject::connect(&translator, &Translator::languageChanged, view, [view]() {
+        view->setSource(QUrl());
         view->setSource(SailfishApp::pathTo(QStringLiteral("qml/harbour-aira.qml")));
     });
 

src/translator.cpp

@@ -40,6 +40,16 @@ void Translator::applySaved()
     apply(language());
 }
 
+bool Translator::catalogLoaded() const
+{
+    return m_catalogLoaded;
+}
+
+QString Translator::localeName() const
+{
+    return m_localeName;
+}
+
 void Translator::apply(const QString &value)
 {
     if (m_translator) {
@@ -67,6 +77,9 @@ void Translator::apply(const QString &value)
         delete translator;
     }
 
+    m_localeName = locale.name();
+    m_catalogLoaded = !m_translator.isNull();
+
     qDebug() << "Translator: richiesta ["
              << (value.isEmpty() ? QStringLiteral("sistema") : value)
              << "] locale" << locale.name()

src/translator.h

@@ -27,6 +27,11 @@ class Translator : public QObject
     Q_OBJECT
 
     Q_PROPERTY(QString language READ language WRITE setLanguage NOTIFY languageChanged)
+    // Diagnostica: quali valori sono in vigore davvero. Finiscono nel /layout che
+    // la Home manda al bridge, cosi' un problema di lingua sul telefono si legge
+    // invece di indovinarlo.
+    Q_PROPERTY(bool catalogLoaded READ catalogLoaded)
+    Q_PROPERTY(QString localeName READ localeName)
 
 public:
     explicit Translator(Settings *settings, QObject *parent = 0);
@@ -35,6 +40,9 @@ public:
     void setLanguage(const QString &value);   // salva nelle impostazioni e applica
     void applySaved();                        // all'avvio, PRIMA di creare la view
 
+    bool catalogLoaded() const;               // catalogo installato?
+    QString localeName() const;               // locale in vigore (es. it_IT)
+
 signals:
     void languageChanged();
 
@@ -43,6 +51,8 @@ private:
 
     Settings *m_settings;
     QPointer<QTranslator> m_translator;
+    QString m_localeName;
+    bool m_catalogLoaded = false;
 };
 
 #endif // TRANSLATOR_H

translations/harbour-aira-it.ts

@@ -521,104 +521,104 @@
 <context>
     <name>MainPage</name>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="62"/>
+        <location filename="../qml/pages/MainPage.qml" line="53"/>
         <source>No data yet</source>
         <translation>Nessun dato</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="64"/>
+        <location filename="../qml/pages/MainPage.qml" line="55"/>
         <source>Not updated · last %1</source>
         <translation>Non aggiornato · ultimo %1</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="67"/>
+        <location filename="../qml/pages/MainPage.qml" line="58"/>
         <source>Updated at %1</source>
         <translation>Aggiornato alle %1</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="112"/>
+        <location filename="../qml/pages/MainPage.qml" line="103"/>
         <source>Refresh</source>
         <translation>Aggiorna</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="124"/>
-        <location filename="../qml/pages/MainPage.qml" line="153"/>
+        <location filename="../qml/pages/MainPage.qml" line="115"/>
+        <location filename="../qml/pages/MainPage.qml" line="144"/>
         <source>Settings</source>
         <translation>Impostazioni</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="210"/>
+        <location filename="../qml/pages/MainPage.qml" line="201"/>
         <source>House</source>
         <translation>Casa</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="212"/>
-        <location filename="../qml/pages/MainPage.qml" line="222"/>
+        <location filename="../qml/pages/MainPage.qml" line="203"/>
+        <location filename="../qml/pages/MainPage.qml" line="213"/>
         <source>target %1 °C</source>
         <translation>obiettivo %1 °C</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="220"/>
+        <location filename="../qml/pages/MainPage.qml" line="211"/>
         <source>Hot water</source>
         <translation>Acqua calda</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="248"/>
+        <location filename="../qml/pages/MainPage.qml" line="237"/>
         <source>Boost · %1</source>
         <translation>Boost · %1</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="259"/>
+        <location filename="../qml/pages/MainPage.qml" line="248"/>
         <source>Tap a value to adjust it</source>
         <translation>Tocca un valore per regolarlo</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="268"/>
+        <location filename="../qml/pages/MainPage.qml" line="257"/>
         <source>Quick actions</source>
         <translation>Azioni rapide</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="292"/>
+        <location filename="../qml/pages/MainPage.qml" line="281"/>
         <source>Boost</source>
         <translation>Boost</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="292"/>
+        <location filename="../qml/pages/MainPage.qml" line="281"/>
         <source>Stop</source>
         <translation>Stop</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="312"/>
+        <location filename="../qml/pages/MainPage.qml" line="301"/>
         <source>Home</source>
         <translation>Torna</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="312"/>
+        <location filename="../qml/pages/MainPage.qml" line="301"/>
         <source>Away</source>
         <translation>Assenza</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="339"/>
+        <location filename="../qml/pages/MainPage.qml" line="328"/>
         <source>More</source>
         <translation>Altro</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="362"/>
+        <location filename="../qml/pages/MainPage.qml" line="351"/>
         <source>Outside %1 °C · Thermostat %2 °C · Zones %3</source>
         <translation>Esterno %1 °C · Termostato %2 °C · Zone %3</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="116"/>
+        <location filename="../qml/pages/MainPage.qml" line="107"/>
         <source>Data</source>
         <translation>Dati</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="144"/>
+        <location filename="../qml/pages/MainPage.qml" line="135"/>
         <source>Bridge not configured. Open the settings and enter the server address and the token.</source>
         <translation>Bridge non configurato. Apri le impostazioni e inserisci l&apos;indirizzo del server e il token.</translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="120"/>
+        <location filename="../qml/pages/MainPage.qml" line="111"/>
         <source>Plant</source>
         <translation>Impianto</translation>
     </message>

translations/harbour-aira.ts

@@ -521,104 +521,104 @@
 <context>
     <name>MainPage</name>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="62"/>
+        <location filename="../qml/pages/MainPage.qml" line="53"/>
         <source>No data yet</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="64"/>
+        <location filename="../qml/pages/MainPage.qml" line="55"/>
         <source>Not updated · last %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="67"/>
+        <location filename="../qml/pages/MainPage.qml" line="58"/>
         <source>Updated at %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="112"/>
+        <location filename="../qml/pages/MainPage.qml" line="103"/>
         <source>Refresh</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="116"/>
+        <location filename="../qml/pages/MainPage.qml" line="107"/>
         <source>Data</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="120"/>
+        <location filename="../qml/pages/MainPage.qml" line="111"/>
         <source>Plant</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="124"/>
-        <location filename="../qml/pages/MainPage.qml" line="153"/>
+        <location filename="../qml/pages/MainPage.qml" line="115"/>
+        <location filename="../qml/pages/MainPage.qml" line="144"/>
         <source>Settings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="144"/>
+        <location filename="../qml/pages/MainPage.qml" line="135"/>
         <source>Bridge not configured. Open the settings and enter the server address and the token.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="210"/>
+        <location filename="../qml/pages/MainPage.qml" line="201"/>
         <source>House</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="212"/>
-        <location filename="../qml/pages/MainPage.qml" line="222"/>
+        <location filename="../qml/pages/MainPage.qml" line="203"/>
+        <location filename="../qml/pages/MainPage.qml" line="213"/>
         <source>target %1 °C</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="220"/>
+        <location filename="../qml/pages/MainPage.qml" line="211"/>
         <source>Hot water</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="248"/>
+        <location filename="../qml/pages/MainPage.qml" line="237"/>
         <source>Boost · %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="259"/>
+        <location filename="../qml/pages/MainPage.qml" line="248"/>
         <source>Tap a value to adjust it</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="268"/>
+        <location filename="../qml/pages/MainPage.qml" line="257"/>
         <source>Quick actions</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="292"/>
+        <location filename="../qml/pages/MainPage.qml" line="281"/>
         <source>Boost</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="292"/>
+        <location filename="../qml/pages/MainPage.qml" line="281"/>
         <source>Stop</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="312"/>
+        <location filename="../qml/pages/MainPage.qml" line="301"/>
         <source>Home</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="312"/>
+        <location filename="../qml/pages/MainPage.qml" line="301"/>
         <source>Away</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="339"/>
+        <location filename="../qml/pages/MainPage.qml" line="328"/>
         <source>More</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../qml/pages/MainPage.qml" line="362"/>
+        <location filename="../qml/pages/MainPage.qml" line="351"/>
         <source>Outside %1 °C · Thermostat %2 °C · Zones %3</source>
         <translation type="unfinished"></translation>
     </message>