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feat(i18n): add ES, FR, PT, DE languages and fix live switching

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Add Spanish, French, Portuguese, German translations to all UI strings.

Fix language switching in Avalonia compiled bindings: instead of firing
PropertyChanged("Item[]") on a singleton (which Avalonia ignores when the
object reference is unchanged), Loc.SwitchTo() now creates a new Loc
instance for the selected language and replaces both Loc.Instance and the
ViewModel's _loc field. OnPropertyChanged("Loc") then forces Avalonia to
re-evaluate all {Binding Loc[key]} bindings with the new instance.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Davide Grilli
2026-06-11 18:41:31 +02:00
parent 75583f7a69
commit 71a604c8a5
3 changed files with 205 additions and 120 deletions
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src/App/ViewModels/MainWindowViewModel.cs
+15 -3
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@@ -46,8 +46,10 @@ public partial class MainWindowViewModel : ViewModelBase
/// <summary>Configurazione globale (§8): lingua e unità.</summary>
private AppConfig _config = AppConfig.Load();
/// <summary>Stringhe localizzate, bindabili da XAML come Loc[chiave].</summary>
public Loc Loc => Loc.Instance;
/// <summary>Istanza Loc corrente: viene rimpiazzata ad ogni cambio lingua
/// così Avalonia vede un riferimento diverso e rivaluta le binding {Binding Loc[chiave]}.</summary>
private Loc _loc = Loc.Instance;
public Loc Loc => _loc;
/// <summary>Unità corrente per il campo importo del pannello Invia.</summary>
public string UnitLabel => _config.Unit;
@@ -57,6 +59,10 @@ public partial class MainWindowViewModel : ViewModelBase
// Spunte del menu Impostazioni (ToggleType Radio).
public bool IsLangIt => _config.Language == "it";
public bool IsLangEn => _config.Language == "en";
public bool IsLangEs => _config.Language == "es";
public bool IsLangFr => _config.Language == "fr";
public bool IsLangPt => _config.Language == "pt";
public bool IsLangDe => _config.Language == "de";
public bool IsUnitPlm => _config.Unit == "PLM";
public bool IsUnitMilli => _config.Unit == "mPLM";
public bool IsUnitMicro => _config.Unit == "µPLM";
@@ -81,10 +87,15 @@ public partial class MainWindowViewModel : ViewModelBase
{
_config = config;
_config.Save();
Loc.SetLanguage(config.Language);
_loc = Loc.SwitchTo(config.Language);
OnPropertyChanged(nameof(Loc));
OnPropertyChanged(nameof(UnitLabel));
OnPropertyChanged(nameof(IsLangIt));
OnPropertyChanged(nameof(IsLangEn));
OnPropertyChanged(nameof(IsLangEs));
OnPropertyChanged(nameof(IsLangFr));
OnPropertyChanged(nameof(IsLangPt));
OnPropertyChanged(nameof(IsLangDe));
OnPropertyChanged(nameof(IsUnitPlm));
OnPropertyChanged(nameof(IsUnitMilli));
OnPropertyChanged(nameof(IsUnitMicro));
@@ -227,6 +238,7 @@ public partial class MainWindowViewModel : ViewModelBase
public MainWindowViewModel()
{
_loc = Loc.SwitchTo(_config.Language);
RefreshSetupState();
// Aggiornamenti continui (§9): ping periodico per tenere viva la
// connessione e accorgersi subito della caduta; se cade, riconnette