Add altitude filter [A] button to radar info bar

src/config.h

@@ -50,6 +50,9 @@ namespace Config {
     constexpr uint8_t RANGE_STEP_COUNT = 4;
     constexpr uint8_t DEFAULT_RANGE_INDEX = 1;
 
+    constexpr uint8_t ALT_FILTER_COUNT = 3;
+    constexpr uint8_t DEFAULT_ALT_FILTER_INDEX = 0;
+
     constexpr const char* ADSB_API_HOST = "opendata.adsb.fi";
     constexpr uint16_t ADSB_API_PORT = 443;
     constexpr uint32_t FETCH_INTERVAL_MS = 8000;

src/radar_screen.cpp

@@ -34,6 +34,7 @@ struct Layout {
 int16_t cx, cy, radius;
         Rect rangeBtn;
         Rect listBtn;
+        Rect altBtn;
         Rect searchBtn;
         Rect helpBtn;
         int16_t infoTop;
@@ -60,9 +61,10 @@ Layout computeLayout(int16_t top) {
         L.radius = min(maxRadiusByWidth, maxRadiusByHeight);
         L.cx = Config::SCREEN_WIDTH / 2;
         L.cy = top + L.radius + 6 + TOP_LABEL_MARGIN;
-        L.rangeBtn = {(int16_t)(Config::SCREEN_WIDTH - 70), (int16_t)(L.infoTop + 4), 62, 22};
-        L.listBtn  = {(int16_t)(Config::SCREEN_WIDTH - 110), (int16_t)(L.infoTop + 4), 36, 22};
-        L.searchBtn = {(int16_t)(Config::SCREEN_WIDTH - 150), (int16_t)(L.infoTop + 4), 36, 22};
+L.rangeBtn = {(int16_t)(Config::SCREEN_WIDTH - 72), (int16_t)(L.infoTop + 4), 64, 22};
+        L.listBtn  = {128, (int16_t)(L.infoTop + 4), 36, 22};
+        L.altBtn   = {88, (int16_t)(L.infoTop + 4), 36, 22};
+        L.searchBtn = {48, (int16_t)(L.infoTop + 4), 36, 22};
         L.helpBtn   = {8, (int16_t)(L.infoTop + 4), 36, 22};
         return L;
     }
@@ -865,6 +867,10 @@ void render(TFT_eSPI& tft, int16_t top) {
 
 if (AirlineFilter::isHidden(a.callsign)) continue;
 
+        uint8_t altMode = SettingsStore::altFilterIndex();
+        if (altMode == 1 && a.altBaroFt >= (int32_t)Config::COLOR_LOW_ALT_THRESHOLD_FT) continue;
+        if (altMode == 2 && a.altBaroFt < (int32_t)Config::COLOR_LOW_ALT_THRESHOLD_FT) continue;
+
         visibleCount++;
 
         RadarMath::PolarCoord polar{a.distanceKm, a.bearingDeg};
@@ -949,9 +955,12 @@ lastPanel.valid = false;
         } else {
             snprintf(rangeLabel, sizeof(rangeLabel), "%.0fnm", Units::kmToNm(rangeKm));
         }
+        uint8_t altIdx = SettingsStore::altFilterIndex();
+        const char* altLabels[] = {"All", "<10k", ">10k"};
         drawButton(tft, L.helpBtn, "?");
         drawButton(tft, L.searchBtn, "S");
         drawButton(tft, L.listBtn, "L");
+        drawButton(tft, L.altBtn, altLabels[altIdx]);
         drawButton(tft, L.rangeBtn, rangeLabel);
 
         drawLegend(tft, infoTop + 44);
@@ -1105,6 +1114,12 @@ bool handleTap(TFT_eSPI& tft, int16_t x, int16_t y, int16_t top) {
         return true;
     }
 
+    if (L.altBtn.contains(x, y)) {
+        uint8_t idx = (SettingsStore::altFilterIndex() + 1) % Config::ALT_FILTER_COUNT;
+        SettingsStore::setAltFilterIndex(idx);
+        return true;
+    }
+
     if (L.rangeBtn.contains(x, y)) {
         uint8_t idx = (SettingsStore::rangeIndex() + 1) % Config::RANGE_STEP_COUNT;
         SettingsStore::setRangeIndex(idx);
@@ -1174,6 +1189,11 @@ bool runTable(TFT_eSPI& tft, int16_t top) {
             if (table[i].distanceKm > rangeKm * 1.05f) continue;
             if (SettingsStore::hideGroundVehicles() && table[i].category[0] == 'C') continue;
 if (AirlineFilter::isHidden(table[i].callsign)) continue;
+
+            uint8_t altMode = SettingsStore::altFilterIndex();
+            if (altMode == 1 && table[i].altBaroFt >= (int32_t)Config::COLOR_LOW_ALT_THRESHOLD_FT) continue;
+            if (altMode == 2 && table[i].altBaroFt < (int32_t)Config::COLOR_LOW_ALT_THRESHOLD_FT) continue;
+
             snapshot[count++] = table[i];
         }
         AircraftTable::unlock();

src/settings_store.cpp

@@ -8,6 +8,7 @@ namespace SettingsStore {
 
 namespace {
     uint8_t rangeIdx = Config::DEFAULT_RANGE_INDEX;
+    uint8_t altFilterIdx = Config::DEFAULT_ALT_FILTER_INDEX;
     bool inverted = true; // Dieses Board braucht invertDisplay(true) fuer korrekte Farben (siehe main.cpp)
     uint8_t brightnessPct = Config::BRIGHTNESS_MAX_PERCENT;
     bool emergencyAlertOn = true;
@@ -33,6 +34,11 @@ namespace {
             if (v >= 0 && v < Config::RANGE_STEP_COUNT) {
                 rangeIdx = (uint8_t)v;
             }
+        } else if (key == "alt_filter_index") {
+            int v = value.toInt();
+            if (v >= 0 && v < Config::ALT_FILTER_COUNT) {
+                altFilterIdx = (uint8_t)v;
+            }
         } else if (key == "invert") {
             inverted = (value.toInt() != 0);
         } else if (key == "brightness_percent") {
@@ -114,6 +120,7 @@ void save() {
     File f = SD.open(Config::SD_SETTINGS_FILE, FILE_WRITE);
     if (!f) return;
     f.printf("range_index=%d\n", rangeIdx);
+    f.printf("alt_filter_index=%d\n", altFilterIdx);
     f.printf("invert=%d\n", inverted ? 1 : 0);
     f.printf("brightness_percent=%d\n", brightnessPct);
     f.printf("emergency_alert=%d\n", emergencyAlertOn ? 1 : 0);
@@ -141,6 +148,15 @@ void setRangeIndex(uint8_t idx) {
     }
 }
 
+uint8_t altFilterIndex() { return altFilterIdx; }
+
+void setAltFilterIndex(uint8_t idx) {
+    if (idx < Config::ALT_FILTER_COUNT) {
+        altFilterIdx = idx;
+        save();
+    }
+}
+
 bool displayInverted() { return inverted; }
 
 void setDisplayInverted(bool inv) {

src/settings_store.h

@@ -8,6 +8,9 @@ namespace SettingsStore {
 uint8_t rangeIndex();
     void setRangeIndex(uint8_t idx);
 
+    uint8_t altFilterIndex();
+    void setAltFilterIndex(uint8_t idx);
+
     bool displayInverted();
     void setDisplayInverted(bool inverted);