From 0344227a1b28406d21eb38830da9f0edcb554add Mon Sep 17 00:00:00 2001
From: livio <livio.merola@gmail.com>
Date: Mon, 21 Sep 2026 11:24:22 +0200
Subject: [PATCH] Center map on startup location

---
 Components/Pages/Home.razor        | 37 ++++++++++++++
 LMEMappeCatastaliApp.csproj        |  4 +-
 README.md                          |  2 +
 Services/AzureMapsService.cs       |  2 +-
 Services/PreciseLocationService.cs | 49 +++++++++++++++---
 wwwroot/js/lme-map.js              | 80 +++++++++++++++++++++++++++---
 6 files changed, 155 insertions(+), 19 deletions(-)

diff --git a/Components/Pages/Home.razor b/Components/Pages/Home.razor
index 4664991..e1abaf4 100644
--- a/Components/Pages/Home.razor
+++ b/Components/Pages/Home.razor
@@ -291,6 +291,10 @@
 
                         <section class="panel-section">
                             <h2>GPS e percorso</h2>
+                            <label class="toggle-line project-save-option">
+                                <input type="checkbox" checked="@ShowGpsPosition" @onchange="ToggleGpsPosition" />
+                                <span>Mostra punto e cerchio GPS</span>
+                            </label>
                             <label class="toggle-line project-save-option">
                                 <input type="checkbox" checked="@TrailEnabled" @onchange="ToggleTrail" />
                                 <span>Registra la traccia mentre cammini</span>
@@ -363,6 +367,7 @@
     private double? CatalogFraction { get; set; }
     private bool CatalogBusy { get; set; }
     private bool GpsActive { get; set; }
+    private bool ShowGpsPosition { get; set; } = true;
     private bool DrawToolsVisible { get; set; }
     private bool TrailEnabled { get; set; }
     private bool LayerPanelOpen { get; set; }
@@ -453,10 +458,36 @@
         if (firstRender)
         {
             await JS.InvokeVoidAsync("lmeMap.init");
+            await CenterOnInitialLocationAsync();
             await MigrateLegacyProjectAsync();
         }
     }
 
+    private async Task CenterOnInitialLocationAsync()
+    {
+        using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(12));
+        try
+        {
+            var location = await LocationService.GetCurrentLocationAsync(timeout.Token);
+            if (location is not null)
+            {
+                await JS.InvokeVoidAsync("lmeMap.showInitialPosition", location);
+            }
+            else
+            {
+                await JS.InvokeVoidAsync("lmeMap.showInfo", "Posizione iniziale non disponibile. La mappa resta utilizzabile normalmente.");
+            }
+        }
+        catch (OperationCanceledException)
+        {
+            await JS.InvokeVoidAsync("lmeMap.showInfo", "Ricerca della posizione iniziale scaduta. Usa Avvia GPS per riprovare.");
+        }
+        catch (Exception error)
+        {
+            await JS.InvokeVoidAsync("lmeMap.showInfo", $"Posizione iniziale non disponibile: {error.GetBaseException().Message}");
+        }
+    }
+
     private async Task MigrateLegacyProjectAsync()
     {
         try
@@ -680,6 +711,12 @@
         }
     }
 
+    private async Task ToggleGpsPosition(ChangeEventArgs args)
+    {
+        ShowGpsPosition = (bool?)args.Value == true;
+        await JS.InvokeVoidAsync("lmeMap.setGpsPositionVisible", ShowGpsPosition);
+    }
+
     private async Task StartGps()
     {
         GpsActive = true;
diff --git a/LMEMappeCatastaliApp.csproj b/LMEMappeCatastaliApp.csproj
index 892d88f..84d9445 100644
--- a/LMEMappeCatastaliApp.csproj
+++ b/LMEMappeCatastaliApp.csproj
@@ -28,8 +28,8 @@
         <ApplicationId>com.companyname.lmemappecatastaliapp</ApplicationId>
 
         <!-- Versions -->
-        <ApplicationDisplayVersion>0.2.9</ApplicationDisplayVersion>
-        <ApplicationVersion>13</ApplicationVersion>
+        <ApplicationDisplayVersion>0.2.10</ApplicationDisplayVersion>
+        <ApplicationVersion>14</ApplicationVersion>
 
         <!-- To develop, package, and publish an app to the Microsoft Store, see: https://aka.ms/MauiTemplateUnpackaged -->
         <WindowsPackageType>None</WindowsPackageType>
diff --git a/README.md b/README.md
index 6d1c8b9..eacdf84 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,8 @@ App .NET MAUI Blazor Hybrid per Android, iOS, Mac Catalyst e Windows, pensata pe
 - Archivio multiprogetto nella cartella privata dell'app, con nome, selezione da elenco, sovrascrittura ed eliminazione.
 - Ogni progetto salva file GIS, POI, disegni, traccia e inquadratura; l'inclusione delle particelle catastali rosse e' opzionale.
 - GPS nativo MAUI ad alta precisione con permessi Android/iOS.
+- Centratura automatica una tantum sulla posizione attuale all'apertura, senza mostrare il punto o il cerchio e senza avviare il tracking GPS continuo.
+- Punto e cerchio di precisione del GPS live possono essere mostrati o nascosti dalle impostazioni senza fermare il rilevamento.
 - Marker posizione, cerchio accuratezza in metri, tracciamento percorso.
 - Controllo se la posizione GPS cade dentro un poligono importato o disegnato.
 - Interrogazione WFS ufficiale Agenzia delle Entrate attorno alla posizione GPS per evidenziare la particella catastale corrente quando il servizio restituisce la geometria.
diff --git a/Services/AzureMapsService.cs b/Services/AzureMapsService.cs
index 84031f3..383f940 100644
--- a/Services/AzureMapsService.cs
+++ b/Services/AzureMapsService.cs
@@ -13,7 +13,7 @@ public sealed class AzureMapsService
 
     public AzureMapsService()
     {
-        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.9");
+        _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("LMEMappeCatastali/0.2.10");
         _httpClient.DefaultRequestHeaders.Accept.ParseAdd("application/json");
     }
 
diff --git a/Services/PreciseLocationService.cs b/Services/PreciseLocationService.cs
index a4bbdaa..c0d61d0 100644
--- a/Services/PreciseLocationService.cs
+++ b/Services/PreciseLocationService.cs
@@ -20,6 +20,37 @@ public sealed class PreciseLocationService : IAsyncDisposable
         return status;
     }
 
+    public async Task<LocationSnapshot?> GetCurrentLocationAsync(CancellationToken cancellationToken = default)
+    {
+        var permission = await EnsurePermissionAsync();
+        if (permission != PermissionStatus.Granted)
+        {
+            return null;
+        }
+
+        Location? location = null;
+        try
+        {
+            var request = new GeolocationRequest(GeolocationAccuracy.Best, TimeSpan.FromSeconds(8));
+            location = await Geolocation.Default.GetLocationAsync(request, cancellationToken);
+        }
+        catch (FeatureNotSupportedException)
+        {
+            return null;
+        }
+
+        if (location is null)
+        {
+            var lastKnown = await Geolocation.Default.GetLastKnownLocationAsync();
+            if (lastKnown is not null && lastKnown.Timestamp >= DateTimeOffset.UtcNow.AddMinutes(-15))
+            {
+                location = lastKnown;
+            }
+        }
+
+        return location is null ? null : ToSnapshot(location);
+    }
+
     public async Task StartTrackingAsync(Func<LocationSnapshot, Task> onLocation, Func<string, Task> onError)
     {
         if (trackingCancellation is not null)
@@ -47,14 +78,7 @@ public sealed class PreciseLocationService : IAsyncDisposable
                     var location = await Geolocation.Default.GetLocationAsync(request, token);
                     if (location is not null)
                     {
-                        await onLocation(new LocationSnapshot(
-                            location.Latitude,
-                            location.Longitude,
-                            location.Accuracy,
-                            location.Altitude,
-                            location.Course,
-                            location.Speed,
-                            location.Timestamp));
+                        await onLocation(ToSnapshot(location));
                     }
                 }
                 catch (OperationCanceledException)
@@ -84,6 +108,15 @@ public sealed class PreciseLocationService : IAsyncDisposable
         StopTracking();
         return ValueTask.CompletedTask;
     }
+
+    private static LocationSnapshot ToSnapshot(Location location) => new(
+        location.Latitude,
+        location.Longitude,
+        location.Accuracy,
+        location.Altitude,
+        location.Course,
+        location.Speed,
+        location.Timestamp);
 }
 
 public sealed record LocationSnapshot(
diff --git a/wwwroot/js/lme-map.js b/wwwroot/js/lme-map.js
index 3f02d0f..e4c937c 100644
--- a/wwwroot/js/lme-map.js
+++ b/wwwroot/js/lme-map.js
@@ -19,6 +19,9 @@ const lmeState = {
     measurementRefreshTimer: null,
     gpsMarker: null,
     gpsAccuracy: null,
+    gpsPositionVisible: true,
+    hasLiveGpsFix: false,
+    lastAccuracy: 0,
     gpsTrail: null,
     selectedParcelsLayer: null,
     gpsParcelLayer: null,
@@ -40,6 +43,7 @@ const cadastreCrs = L.extend({}, L.CRS.EPSG4326, { code: "EPSG:4258" });
 window.lmeMap = {
     init,
     showSearchResult,
+    showInitialPosition,
     displayOfficialParcel,
     exportCadastreView,
     closeCadastrePreview,
@@ -69,6 +73,7 @@ window.lmeMap = {
     centerOnGps,
     toggleTrail,
     setNativeGpsPosition,
+    setGpsPositionVisible,
     setGpsError,
     resize,
     showInfo: setInfo
@@ -178,6 +183,23 @@ function showSearchResult(latitude, longitude, label) {
     setInfo(label || `${lat.toFixed(6)}, ${lon.toFixed(6)}`);
 }
 
+function showInitialPosition(location) {
+    const latitude = Number(location?.latitude);
+    const longitude = Number(location?.longitude);
+    const accuracy = Math.max(0, Number(location?.accuracy) || 0);
+    if (!Number.isFinite(latitude) || !Number.isFinite(longitude)) {
+        return;
+    }
+
+    const latlng = [latitude, longitude];
+    lmeState.lastPosition = latlng;
+    lmeState.lastAccuracy = accuracy;
+    lmeState.map.setView(latlng, accuracy > 80 ? 17 : 19);
+    setText("gpsState", "Posizione iniziale acquisita - GPS non attivo");
+    setInfo("Mappa centrata sulla posizione attuale. GPS continuo non attivo.");
+    updateGpsInsideState();
+}
+
 function displayOfficialParcel(xmlText, latitude, longitude, parcel, label, shouldFit) {
     const lat = Number(latitude);
     const lon = Number(longitude);
@@ -1705,6 +1727,25 @@ function setNativeGpsPosition(location) {
     });
 }
 
+function setGpsPositionVisible(enabled) {
+    lmeState.gpsPositionVisible = Boolean(enabled);
+    if (!lmeState.gpsPositionVisible) {
+        if (lmeState.gpsMarker && lmeState.map.hasLayer(lmeState.gpsMarker)) {
+            lmeState.map.removeLayer(lmeState.gpsMarker);
+        }
+        if (lmeState.gpsAccuracy && lmeState.map.hasLayer(lmeState.gpsAccuracy)) {
+            lmeState.map.removeLayer(lmeState.gpsAccuracy);
+        }
+        setInfo("Punto e cerchio GPS nascosti. Il rilevamento continua.");
+        return;
+    }
+
+    if (lmeState.hasLiveGpsFix && lmeState.lastPosition) {
+        updateGpsPositionLayers(lmeState.lastPosition, lmeState.lastAccuracy);
+    }
+    setInfo("Punto e cerchio GPS visibili.");
+}
+
 function setGpsError(error) {
     setText("gpsState", "GPS non disponibile");
     setInfo(error || "Errore GPS.");
@@ -1729,14 +1770,12 @@ function onGpsPosition(position) {
     const { latitude, longitude, accuracy } = position.coords;
     const latlng = [latitude, longitude];
     lmeState.lastPosition = latlng;
-
-    if (!lmeState.gpsMarker) {
-        lmeState.gpsMarker = L.marker(latlng, { title: "La tua posizione" }).addTo(lmeState.map);
-        lmeState.gpsAccuracy = L.circle(latlng, { radius: accuracy, color: "#2563eb", weight: 2, fillColor: "#60a5fa", fillOpacity: 0.16 }).addTo(lmeState.map);
+    lmeState.lastAccuracy = Math.max(0, Number(accuracy) || 0);
+    const firstLiveFix = !lmeState.hasLiveGpsFix;
+    lmeState.hasLiveGpsFix = true;
+    updateGpsPositionLayers(latlng, lmeState.lastAccuracy);
+    if (firstLiveFix) {
         lmeState.map.setView(latlng, 19);
-    } else {
-        lmeState.gpsMarker.setLatLng(latlng);
-        lmeState.gpsAccuracy.setLatLng(latlng).setRadius(accuracy);
     }
 
     if (lmeState.gpsTrailEnabled) {
@@ -1744,10 +1783,35 @@ function onGpsPosition(position) {
         lmeState.gpsTrail.setLatLngs(lmeState.gpsTrailPoints);
     }
 
-    setText("gpsState", `${latitude.toFixed(6)}, ${longitude.toFixed(6)} - precisione ${Math.round(accuracy)} m`);
+    setText("gpsState", `${latitude.toFixed(6)}, ${longitude.toFixed(6)} - precisione ${Math.round(lmeState.lastAccuracy)} m`);
     updateGpsInsideState();
 }
 
+function updateGpsPositionLayers(latlng, accuracy) {
+    if (!lmeState.gpsPositionVisible) {
+        return;
+    }
+    if (!lmeState.gpsMarker) {
+        lmeState.gpsMarker = L.marker(latlng, { title: "La tua posizione" });
+        lmeState.gpsAccuracy = L.circle(latlng, {
+            radius: accuracy,
+            color: "#2563eb",
+            weight: 2,
+            fillColor: "#60a5fa",
+            fillOpacity: 0.16
+        });
+    } else {
+        lmeState.gpsMarker.setLatLng(latlng);
+        lmeState.gpsAccuracy.setLatLng(latlng).setRadius(accuracy);
+    }
+    if (!lmeState.map.hasLayer(lmeState.gpsMarker)) {
+        lmeState.gpsMarker.addTo(lmeState.map);
+    }
+    if (!lmeState.map.hasLayer(lmeState.gpsAccuracy)) {
+        lmeState.gpsAccuracy.addTo(lmeState.map);
+    }
+}
+
 function onGpsError(error) {
     setText("gpsState", "GPS non autorizzato o non disponibile");
     setInfo(error.message || "Errore GPS.");