Remove empty space in forces datafield if no value is below zero

* WIP forces data field

* Remove value label, increase font size

* Add forces datafield description to README

.github/workflows/release_comment.yml

@@ -0,0 +1,54 @@
+name: Comment on Fixed Issues/PRs on Release
+
+on:
+  push:
+    tags:
+      - '*'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Tag to run the workflow for'
+        required: false
+        default: ''
+
+jobs:
+  comment-on-fixed:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Fetch all history for all tags and branches
+      - name: Find closed issues/PRs and comment
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          # Use the input tag if provided, otherwise use the tag from the push event
+          if [ -n "${{ github.event.inputs.tag }}" ]; then
+            RELEASE_TAG="${{ github.event.inputs.tag }}"
+          else
+            RELEASE_TAG="${{ github.ref }}"
+            # Remove the 'refs/tags/' part to get the tag name
+            RELEASE_TAG="${RELEASE_TAG#refs/tags/}"
+          fi
+          
+          # Get the previous tag. If there is no previous tag, this will be empty.
+          PREVIOUS_TAG=$(git tag --sort=-v:refname | grep -v "$RELEASE_TAG" | head -n 1)
+          
+          # Get the commit range
+          if [ -z "$PREVIOUS_TAG" ]; then
+            # If there is no previous tag, get all commits up to the current tag
+            COMMIT_RANGE="$RELEASE_TAG"
+          else
+            COMMIT_RANGE="$PREVIOUS_TAG..$RELEASE_TAG"
+          fi
+          
+          # Find the commits in this release
+          COMMITS=$(git log "$COMMIT_RANGE" --pretty=format:"%B")
+          
+          # Extract issues/PRs closed (simple regex, can be improved)
+          echo "$COMMITS" | grep -oE "#[0-9]+" | sort -u | while read ISSUE; do
+            ISSUE_NUMBER="${ISSUE//#/}"
+            COMMENT="This issue/pr has been fixed in release ${RELEASE_TAG} :tada:"
+            gh issue comment "$ISSUE_NUMBER" --body "$COMMENT"
+          done
+        shell: bash

README.md

@@ -23,17 +23,19 @@ After installing this app on your Karoo and opening it once from the main menu,
 
 - Headwind (graphical, 1x1 field): Shows the headwind direction and speed as a circle with a triangular direction indicator. The speed is shown at the center in your set unit of measurement (default is kilometers per hour if you have set up metric units in your Karoo, otherwise miles per hour). Both direction and speed are relative to the current riding direction by default, i. e., riding directly into a wind of 20 km/h will show a headwind speed of 20 km/h, while riding in the same direction will show -20 km/h.
 - Tailwind with riding speed (graphical, 1x1 field): Shows an arrow indicating the current headwind direction next to a label reading your current speed and the speed of the tailwind. If you ride against a headwind of 5 mph, it will show "-5". If you ride in the same direction of a 5 mph wind, it will read "+5". Text and arrow are colored based on the tailwind speed, with red indicating a strong headwind and green indicating a strong tailwind.
-- Wind direction and speed (graphical, 1x1 field): Similar to the tailwind data field, but shows the absolute wind speed and gust speed instead.
+- Wind direction and speed (graphical, 1x1 field): Similar to the tailwind data field, but shows the absolute wind speed and gust speed instead. The "circular" variant uses the same circular graphics as the headwind indicator instead.
 - Wind forecast / Temperature Forecast / Precipitation forecast (graphical, 2x1 field): Line graphs showing the forecasted wind speeds, temperature or precipitation for the next 12 hours if no route is loaded. If a route is loaded, forecasts along the route will be used instead of the current location.
+- Headwind forecast (graphical, 2x1 field): Shows the forecasted headwind speed if a route is loaded.
 - Weather forecast (graphical, 2x1 field): Shows three columns indicating the current weather conditions (sunny, cloudy, ...), wind direction, precipitation and temperature forecasted for the next three hours. Tap on this widget to cycle through the 12 hour forecast. If you have a route loaded, the forecast widget will show the forecasted weather along points of the route, with an estimated traveled distance per hour of 20 km / 12 miles by default. If placed in a 1x1 datafield, only the current weather conditions are shown.
 - Relative grade (numerical): Shows the relative grade. The relative grade is calculated by estimating the force of the headwind, and then calculating the gradient you would need to ride at to experience this resistance if there was no wind. Example: If you are riding on an actual gradient of 2 %, face a headwind of 18 km/h while riding at 29 km/h, the relative grade will be shown as 5.2 % (with 3.2 % added to the actual grade due to the headwind).
 - Relative elevation gain (numerical): Shows the relative elegation gain. The relative elevation gain is calculated using the relative grade and is an estimation of how much climbing would have been equivalent to the headwind you faced during the ride.
+- Resistance forces (graphical, 2x1 field): Shows a graphical representation of the different forces you have to overcome while riding, including gravity (actual gradient), rolling resistance (based on speed and weight), aerodynamic drag (based on speed) and wind resistance (based on headwind speed). The app reads your weight from your karoo user profile and uses rough estimates for CdA and Crr.
 - Additionally, data fields that only show the current data value for headwind speed, humidity, cloud cover, absolute wind speed, absolute wind gust speed, absolute wind direction, rainfall and surface pressure can be added if desired.
 
 The app can use OpenMeteo or OpenWeatherMap as providers for live weather data.
 
 - OpenMeteo is the default provider and does not require any configuration. Wind speed will be reported in km/h if your karoo is set to metric units or mph if set to imperial.
-- OpenWeatherMap can provide more accurate data for some locations. Forecasts along the loaded route are not available using OpenWeatherMap. OpenWeatherMap is free for personal use, but you need to register at https://openweathermap.org/home/sign_in and obtain a one call API key (e. g. by subscribing to "One Call API 3.0" from the [pricing page](https://openweathermap.org/price)). You can enter your API key in the app settings. Please note that it can take a few hours before OpenWeatherMap enables the key. You can check if your key is enabled by entering it in the app settings and pressing "Test API Key". Wind speed will be reported in meters per second if your Karoo is set to metric units and miles per hour if set to imperial.
+- OpenWeatherMap can provide more accurate data for some locations. Forecasts along the loaded route are not available using OpenWeatherMap. OpenWeatherMap is free for personal use, but you need to register at https://openweathermap.org/home/sign_in and obtain a one call API key (e. g. by subscribing to "One Call API 3.0" from the [pricing page](https://openweathermap.org/price)). You can enter your API key in the app settings. Please note that it can take a few hours before OpenWeatherMap enables the key. You can check if your key is enabled by entering it in the app settings and pressing "Test API Key". Wind speed will be reported in km/h if your Karoo is set to metric units and miles per hour if set to imperial.
 
 The app will automatically attempt to download weather data from the selected data provider once your device has acquired a GPS fix. Your location is rounded to approximately three kilometers to maintain privacy.
 New weather data is downloaded when you ride more than three kilometers from the location where the weather data was downloaded for or after one hour at the latest.
@@ -56,4 +58,4 @@ has not been set up. Otherwise, the value is the headwind direction in degrees.
 - The `windDirection` datatype contains a single field with the *absolute* wind direction in degrees (so 0 = North, 90 = East etc.)
 - The `headwindSpeed` datatype contains a single field that contains the *relative*  headwind speed in meters per second.
 - The `windSpeed` datatype contains a single field that contains the *absolute* wind speed in meters per second.
-- Other datatypes like `windGusts` etc. are also available, see [extension_info.xml](https://github.com/timklge/karoo-headwind/blob/master/app/src/main/res/xml/extension_info.xml)
+- Other datatypes like `windGusts` etc. are also available, see [extension_info.xml](https://github.com/timklge/karoo-headwind/blob/master/app/src/main/res/xml/extension_info.xml)

app/build.gradle.kts

@@ -72,7 +72,7 @@ tasks.register("generateManifest") {
             "latestVersionCode" to android.defaultConfig.versionCode,
             "developer" to "github.com/timklge",
             "description" to "Open-source extension that provides headwind direction, wind speed, forecast and other weather data fields.",
-            "releaseNotes" to "* Crop timespan in forecast widgets to 6 hours, use am / pm time format, enlarge font\n* Remove tailwind, icon forecast, weather data fields",
+            "releaseNotes" to "* Open main extension menu when clicking on graphical headwind / tailwind datafield\n* Only update position if the estimated accuracy is within 500 meters\n* Add force distribution datafield\n* Only increase relative elevation gain when relative grade is positive",
             "screenshotUrls" to listOf(
                 "$baseUrl/preview1.png",
                 "$baseUrl/preview3.png",

app/src/main/kotlin/de/timklge/karooheadwind/DataStore.kt

@@ -294,9 +294,9 @@ fun lerpWeather(
         weatherCode = closestWeatherData.weatherCode,
         isForecast = closestWeatherData.isForecast,
         isNight = closestWeatherData.isNight,
+        uvi = start.uvi + (end.uvi - start.uvi) * factor
     )
 }
-
 fun lerpWeatherTime(
     weatherData: List<WeatherData>?,
     currentWeatherData: WeatherData

app/src/main/kotlin/de/timklge/karooheadwind/Extensions.kt

@@ -2,7 +2,6 @@ package de.timklge.karooheadwind
 
 import io.hammerhead.karooext.KarooSystemService
 import io.hammerhead.karooext.models.ActiveRidePage
-import io.hammerhead.karooext.models.OnLocationChanged
 import io.hammerhead.karooext.models.OnNavigationState
 import io.hammerhead.karooext.models.OnStreamState
 import io.hammerhead.karooext.models.RideState
@@ -14,7 +13,6 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.sample
 import kotlinx.coroutines.flow.transform
 
 fun KarooSystemService.streamDataFlow(dataTypeId: String): Flow<StreamState> {
@@ -28,17 +26,6 @@ fun KarooSystemService.streamDataFlow(dataTypeId: String): Flow<StreamState> {
     }
 }
 
-fun KarooSystemService.streamLocation(): Flow<OnLocationChanged> {
-    return callbackFlow {
-        val listenerId = addConsumer { event: OnLocationChanged ->
-            trySendBlocking(event)
-        }
-        awaitClose {
-            removeConsumer(listenerId)
-        }
-    }
-}
-
 fun KarooSystemService.streamNavigationState(): Flow<OnNavigationState> {
     return callbackFlow {
         val listenerId = addConsumer { event: OnNavigationState ->

app/src/main/kotlin/de/timklge/karooheadwind/HeadingFlow.kt

@@ -5,16 +5,18 @@ import android.util.Log
 import de.timklge.karooheadwind.datatypes.GpsCoordinates
 import de.timklge.karooheadwind.util.signedAngleDifference
 import io.hammerhead.karooext.KarooSystemService
-import kotlinx.coroutines.awaitCancellation
+import io.hammerhead.karooext.models.DataType
+import io.hammerhead.karooext.models.StreamState
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.emitAll
-import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.firstOrNull
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.mapNotNull
 
 sealed class HeadingResponse {
     data object NoGps: HeadingResponse()
@@ -99,12 +101,51 @@ fun KarooSystemService.getGpsCoordinateFlow(context: Context): Flow<GpsCoordinat
     val initialFlow = flow {
         val lastKnownPosition = context.getLastKnownPosition()
 
-        emit(lastKnownPosition)
+        if (lastKnownPosition == null) {
+            val initialState = streamDataFlow(DataType.Type.LOCATION).firstOrNull()?.let { it as? StreamState.Streaming }
+
+            initialState?.dataPoint?.let { dataPoint ->
+                val lat = dataPoint.values[DataType.Field.LOC_LATITUDE]
+                val lng = dataPoint.values[DataType.Field.LOC_LONGITUDE]
+                val orientation = dataPoint.values[DataType.Field.LOC_BEARING]
+                val accuracy = dataPoint.values[DataType.Field.LOC_ACCURACY]
+
+                if (lat != null && lng != null && accuracy != null && accuracy < 500) {
+                    emit(GpsCoordinates(lat, lng, orientation))
+
+                    Log.i(KarooHeadwindExtension.TAG, "No last known position found, fetched initial GPS position")
+                } else {
+                    emit(null)
+
+                    Log.w(KarooHeadwindExtension.TAG, "No last known position found, initial GPS position is unavailable")
+                }
+            } ?: run {
+                emit(null)
+
+                Log.w(KarooHeadwindExtension.TAG, "No last known position found, initial GPS position is unavailable")
+            }
+        } else {
+            emit(lastKnownPosition)
+
+            Log.i(KarooHeadwindExtension.TAG, "Using last known position: $lastKnownPosition")
+        }
     }
 
-    val gpsFlow = streamLocation()
+    val gpsFlow = streamDataFlow(DataType.Type.LOCATION).mapNotNull { it as? StreamState.Streaming }
-        .filter { it.orientation != null }
+        .mapNotNull { dataPoint ->
-        .map { GpsCoordinates(it.lat, it.lng, it.orientation) }
+            val lat = dataPoint.dataPoint.values[DataType.Field.LOC_LATITUDE]
+            val lng = dataPoint.dataPoint.values[DataType.Field.LOC_LONGITUDE]
+            val orientation = dataPoint.dataPoint.values[DataType.Field.LOC_BEARING]
+            val accuracy = dataPoint.dataPoint.values[DataType.Field.LOC_ACCURACY]
+
+            Log.i(KarooHeadwindExtension.TAG, "Received GPS update: lat=$lat, lng=$lng, accuracy=$accuracy, orientation=$orientation")
+
+            if (lat != null && lng != null && accuracy != null && accuracy < 500) {
+                GpsCoordinates(lat, lng, orientation)
+            } else {
+                null
+            }
+        }
 
     val concatenatedFlow = concatenate(initialFlow, gpsFlow)
 

app/src/main/kotlin/de/timklge/karooheadwind/KarooHeadwindExtension.kt

@@ -7,19 +7,23 @@ import com.mapbox.turf.TurfMeasurement
 import de.timklge.karooheadwind.datatypes.CloudCoverDataType
 import de.timklge.karooheadwind.datatypes.GpsCoordinates
 import de.timklge.karooheadwind.datatypes.HeadwindDirectionDataType
+import de.timklge.karooheadwind.datatypes.HeadwindForecastDataType
 import de.timklge.karooheadwind.datatypes.HeadwindSpeedDataType
 import de.timklge.karooheadwind.datatypes.PrecipitationDataType
 import de.timklge.karooheadwind.datatypes.PrecipitationForecastDataType
 import de.timklge.karooheadwind.datatypes.RelativeElevationGainDataType
 import de.timklge.karooheadwind.datatypes.RelativeGradeDataType
 import de.timklge.karooheadwind.datatypes.RelativeHumidityDataType
+import de.timklge.karooheadwind.datatypes.ResistanceForcesDataType
 import de.timklge.karooheadwind.datatypes.SealevelPressureDataType
 import de.timklge.karooheadwind.datatypes.SurfacePressureDataType
 import de.timklge.karooheadwind.datatypes.TailwindAndRideSpeedDataType
 import de.timklge.karooheadwind.datatypes.TemperatureDataType
 import de.timklge.karooheadwind.datatypes.TemperatureForecastDataType
+import de.timklge.karooheadwind.datatypes.UviDataType
 import de.timklge.karooheadwind.datatypes.WeatherForecastDataType
 import de.timklge.karooheadwind.datatypes.WindDirectionAndSpeedDataType
+import de.timklge.karooheadwind.datatypes.WindDirectionAndSpeedDataTypeCircle
 import de.timklge.karooheadwind.datatypes.WindDirectionDataType
 import de.timklge.karooheadwind.datatypes.WindForecastDataType
 import de.timklge.karooheadwind.datatypes.WindGustsDataType
@@ -43,8 +47,6 @@ import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.retry
 import kotlinx.coroutines.flow.transformLatest
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.time.debounce
-import java.time.Duration
 import java.time.LocalDateTime
 import java.time.temporal.ChronoUnit
 import kotlin.math.absoluteValue
@@ -66,6 +68,7 @@ class KarooHeadwindExtension : KarooExtension("karoo-headwind", BuildConfig.VERS
         listOf(
             HeadwindDirectionDataType(karooSystem, applicationContext),
             TailwindAndRideSpeedDataType(karooSystem, applicationContext),
+            WindDirectionAndSpeedDataTypeCircle(karooSystem, applicationContext),
             WeatherForecastDataType(karooSystem),
             HeadwindSpeedDataType(karooSystem, applicationContext),
             RelativeHumidityDataType(karooSystem, applicationContext),
@@ -80,10 +83,13 @@ class KarooHeadwindExtension : KarooExtension("karoo-headwind", BuildConfig.VERS
             TemperatureForecastDataType(karooSystem),
             PrecipitationForecastDataType(karooSystem),
             WindForecastDataType(karooSystem),
+            HeadwindForecastDataType(karooSystem),
             WindDirectionAndSpeedDataType(karooSystem, applicationContext),
             RelativeGradeDataType(karooSystem, applicationContext),
             RelativeElevationGainDataType(karooSystem, applicationContext),
-            TemperatureDataType(karooSystem, applicationContext)
+            TemperatureDataType(karooSystem, applicationContext),
+            UviDataType(karooSystem, applicationContext),
+            ResistanceForcesDataType(karooSystem, applicationContext)
         )
     }
 
@@ -115,7 +121,7 @@ class KarooHeadwindExtension : KarooExtension("karoo-headwind", BuildConfig.VERS
                         old == new
                     }
                 }
-                .debounce(Duration.ofSeconds(5))
+                .throttle(5_000L)
 
             var requestedGpsCoordinates: List<GpsCoordinates> = emptyList()
 
@@ -234,7 +240,7 @@ class KarooHeadwindExtension : KarooExtension("karoo-headwind", BuildConfig.VERS
                 response
             }.retry(Long.MAX_VALUE) { e ->
                 Log.w(TAG, "Failed to get weather data", e)
-                delay(1.minutes); true
+                delay(2.minutes); true
             }.collect { response ->
                 try {
                     saveCurrentData(applicationContext, response)

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/ForecastDataType.kt

@@ -65,27 +65,29 @@ import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.launch
 import java.time.Instant
 import java.time.ZoneId
-import java.time.format.DateTimeFormatter
 import java.time.temporal.ChronoUnit
 import kotlin.math.abs
 import kotlin.math.roundToInt
 
 abstract class ForecastDataType(private val karooSystem: KarooSystemService, typeId: String) : DataTypeImpl("karoo-headwind", typeId) {
     @Composable
-    abstract fun RenderWidget(arrowBitmap: Bitmap,
+    abstract fun RenderWidget(
-                              current: WeatherInterpretation,
+        arrowBitmap: Bitmap,
-                              windBearing: Int,
+        current: WeatherInterpretation,
-                              windSpeed: Int,
+        windBearing: Int,
-                              windGusts: Int,
+        windSpeed: Int,
-                              precipitation: Double,
+        windGusts: Int,
-                              precipitationProbability: Int?,
+        precipitation: Double,
-                              temperature: Int,
+        precipitationProbability: Int?,
-                              temperatureUnit: TemperatureUnit,
+        temperature: Int,
-                              timeLabel: String,
+        temperatureUnit: TemperatureUnit,
-                              dateLabel: String?,
+        timeLabel: String,
-                              distance: Double?,
+        dateLabel: String?,
-                              isImperial: Boolean,
+        distance: Double?,
-                              isNight: Boolean)
+        isImperial: Boolean,
+        isNight: Boolean,
+        uvi: Double
+    )
 
     @OptIn(ExperimentalGlanceRemoteViewsApi::class)
     private val glance = GlanceRemoteViews()
@@ -107,6 +109,7 @@ abstract class ForecastDataType(private val karooSystem: KarooSystemService, typ
                     val weatherData = (0..<12).map {
                         val forecastTime = timeAtFullHour + it * 60 * 60
                         val forecastTemperature = 20.0 + (-20..20).random()
+                        val forecastUvi = 0.0 + (0..12).random().toDouble()
                         val forecastPrecipitation = 0.0 + (0..10).random()
                         val forecastPrecipitationProbability = (0..100).random()
                         val forecastWeatherCode = WeatherInterpretation.getKnownWeatherCodes().random()
@@ -127,7 +130,8 @@ abstract class ForecastDataType(private val karooSystem: KarooSystemService, typ
                             windGusts = forecastWindGusts,
                             weatherCode = forecastWeatherCode,
                             isForecast = true,
-                            isNight = it < 2
+                            isNight = it < 2,
+                            uvi = forecastUvi
                         )
                     }
 
@@ -149,7 +153,8 @@ abstract class ForecastDataType(private val karooSystem: KarooSystemService, typ
                             windGusts = 10.0,
                             weatherCode = WeatherInterpretation.getKnownWeatherCodes().random(),
                             isForecast = false,
-                            isNight = false
+                            isNight = false,
+                            uvi = 2.0
                         ),
                         coords = GpsCoordinates(0.0, 0.0, distanceAlongRoute = index * distancePerHour),
                         timezone = "UTC",
@@ -333,7 +338,8 @@ abstract class ForecastDataType(private val karooSystem: KarooSystemService, typ
                                     dateLabel = if (hasNewDate) formattedDate else null,
                                     distance = null,
                                     isImperial = settingsAndProfile.isImperial,
-                                    isNight = data.current.isNight
+                                    isNight = data.current.isNight,
+                                    uvi = data.current.uvi
                                 )
 
                                 previousDate = formattedDate
@@ -359,7 +365,8 @@ abstract class ForecastDataType(private val karooSystem: KarooSystemService, typ
                                     dateLabel = if (hasNewDate) formattedDate else null,
                                     distance = if (settingsAndProfile.settings.showDistanceInForecast) distanceFromCurrent else null,
                                     isImperial = settingsAndProfile.isImperial,
-                                    isNight = weatherData?.isNight == true
+                                    isNight = weatherData?.isNight == true,
+                                    uvi = weatherData?.uvi ?: 0.0
                                 )
 
                                 previousDate = formattedDate

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionDataType.kt

@@ -67,24 +67,7 @@ class HeadwindDirectionDataType(
             val value = (streamData.headingResponse as? HeadingResponse.Value)?.diff
 
             var returnValue = 0.0
-            if (value == null || streamData.absoluteWindDirection == null || streamData.windSpeed == null){
+            if (value != null && streamData.absoluteWindDirection != null && streamData.windSpeed != null) {
-                var errorCode = 1.0
-                var headingResponse = streamData.headingResponse
-
-                if (headingResponse is HeadingResponse.Value && (streamData.absoluteWindDirection == null || streamData.windSpeed == null)){
-                    headingResponse = HeadingResponse.NoWeatherData
-                }
-
-                if (streamData.settings.welcomeDialogAccepted == false){
-                    errorCode = ERROR_APP_NOT_SET_UP.toDouble()
-                } else if (headingResponse is HeadingResponse.NoGps){
-                    errorCode = ERROR_NO_GPS.toDouble()
-                } else {
-                    errorCode = ERROR_NO_WEATHER_DATA.toDouble()
-                }
-
-                returnValue = errorCode
-            } else {
                 var windDirection = value
 
                 if (windDirection < 0) windDirection += 360
@@ -222,15 +205,4 @@ class HeadwindDirectionDataType(
             }
         }
     }
-}
+}
-
-suspend fun KarooSystemService.getRefreshRateInMilliseconds(context: Context): Long {
-    val refreshRate = context.streamSettings(this).first().refreshRate
-    val isK2 = hardwareType == HardwareType.K2
-
-    return if (isK2){
-        refreshRate.k2Ms
-    } else {
-        refreshRate.k3Ms
-    }
-}

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindDirectionView.kt

@@ -67,7 +67,7 @@ fun HeadwindDirection(
     val baseModifier = GlanceModifier.fillMaxSize().padding(5.dp).background(dayColor, nightColor).cornerRadius(10.dp)
 
     Box(
-        modifier = baseModifier, // TODO if (!preview) baseModifier.clickable(actionStartActivity<MainActivity>()) else baseModifier,
+        modifier = if (!preview) baseModifier.clickable(actionStartActivity<MainActivity>()) else baseModifier,
         contentAlignment = Alignment(
             vertical = Alignment.Vertical.CenterVertically,
             horizontal = Alignment.Horizontal.CenterHorizontally,

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/HeadwindForecastDataType.kt

@@ -0,0 +1,148 @@
+package de.timklge.karooheadwind.datatypes
+
+import android.content.Context
+import android.util.Log
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.toArgb
+import androidx.core.content.ContextCompat
+import com.mapbox.turf.TurfConstants
+import com.mapbox.turf.TurfMeasurement
+import de.timklge.karooheadwind.KarooHeadwindExtension
+import de.timklge.karooheadwind.R
+import de.timklge.karooheadwind.UpcomingRoute
+import de.timklge.karooheadwind.lerpWeather
+import de.timklge.karooheadwind.screens.LineGraphBuilder
+import de.timklge.karooheadwind.screens.isNightMode
+import de.timklge.karooheadwind.util.signedAngleDifference
+import io.hammerhead.karooext.KarooSystemService
+import kotlin.math.ceil
+import kotlin.math.cos
+import kotlin.math.floor
+
+fun interpolateWindLineColor(windSpeedInKmh: Double, night: Boolean, context: Context): androidx.compose.ui.graphics.Color {
+    val default = Color(ContextCompat.getColor(context, R.color.gray))
+    val green = Color(ContextCompat.getColor(context, R.color.green))
+    val red = Color(ContextCompat.getColor(context, R.color.red))
+    val orange = Color(ContextCompat.getColor(context, R.color.orange))
+
+    return when {
+        windSpeedInKmh <= -10 -> green
+        windSpeedInKmh >= 15 -> red
+        windSpeedInKmh in -10.0..0.0 -> interpolateColor(green, default, -10.0, 0.0, windSpeedInKmh)
+        windSpeedInKmh in 0.0..10.0 -> interpolateColor(default, orange, 0.0, 10.0, windSpeedInKmh)
+        else -> interpolateColor(orange, red, 10.0, 15.0, windSpeedInKmh)
+    }
+}
+
+class HeadwindForecastDataType(karooSystem: KarooSystemService) : LineGraphForecastDataType(karooSystem, "headwindForecast") {
+    override fun getLineData(
+        lineData: List<LineData>,
+        isImperial: Boolean,
+        upcomingRoute: UpcomingRoute?,
+        isPreview: Boolean,
+        context: Context
+    ): LineGraphForecastData {
+        if (upcomingRoute == null && !isPreview){
+            return LineGraphForecastData.Error("No route loaded")
+        }
+
+        val windPoints = lineData.map { data ->
+            if (isImperial) { // Convert m/s to mph
+                data.weatherData.windSpeed * 2.23694 // Convert m/s to mph
+            } else { // Convert m/s to km/h
+                data.weatherData.windSpeed * 3.6 // Convert m/s to km/h
+            }
+        }
+
+        val headwindPoints = try {
+            (0..<HEADWIND_SAMPLE_COUNT).mapNotNull { i ->
+                val t = i / HEADWIND_SAMPLE_COUNT.toDouble()
+
+                if (isPreview) {
+                    // Use a sine wave for headwind preview speed
+                    val headwindSpeed = 10f * kotlin.math.sin(i * Math.PI * 2 / HEADWIND_SAMPLE_COUNT).toFloat()
+
+                    return@mapNotNull LineGraphBuilder.DataPoint(x = i.toFloat() * (windPoints.size / HEADWIND_SAMPLE_COUNT.toFloat()),
+                        y = headwindSpeed)
+                }
+
+                if (upcomingRoute == null) {
+                    Log.e(KarooHeadwindExtension.TAG, "Upcoming route is null")
+                    return@mapNotNull null
+                }
+
+                val beforeLineData = lineData.getOrNull(floor((lineData.size) * t).toInt().coerceAtLeast(0)) ?: lineData.firstOrNull()
+                val afterLineData = lineData.getOrNull(ceil((lineData.size) * t).toInt().coerceAtLeast(0)) ?: lineData.lastOrNull()
+
+                if (beforeLineData?.weatherData == null || afterLineData?.weatherData == null || beforeLineData.distance == null
+                    || afterLineData.distance == null || beforeLineData == afterLineData) return@mapNotNull null
+
+                val dt = remap(t.toFloat(),
+                    floor(lineData.size * t).toFloat() / lineData.size,
+                    ceil(lineData.size * t).toFloat() / lineData.size,
+                    0.0f, 1.0f
+                ).toDouble()
+                val interpolatedWeather = lerpWeather(beforeLineData.weatherData, afterLineData.weatherData, dt)
+                val beforeDistanceAlongRoute = beforeLineData.distance
+                val afterDistanceAlongRoute = afterLineData.distance
+                val distanceAlongRoute = (beforeDistanceAlongRoute + (afterDistanceAlongRoute - beforeDistanceAlongRoute) * dt).coerceIn(0.0, upcomingRoute.routeLength)
+                val coordsAlongRoute = try {
+                    TurfMeasurement.along(upcomingRoute.routePolyline, distanceAlongRoute, TurfConstants.UNIT_METERS)
+                } catch(e: Exception) {
+                    Log.e(KarooHeadwindExtension.TAG, "Error getting coordinates along route", e)
+                    return@mapNotNull null
+                }
+                val nextCoordsAlongRoute = try {
+                    TurfMeasurement.along(upcomingRoute.routePolyline, distanceAlongRoute + 5, TurfConstants.UNIT_METERS)
+                } catch(e: Exception) {
+                    Log.e(KarooHeadwindExtension.TAG, "Error getting next coordinates along route", e)
+                    return@mapNotNull null
+                }
+                val bearingAlongRoute = try {
+                    TurfMeasurement.bearing(coordsAlongRoute, nextCoordsAlongRoute)
+                } catch(e: Exception) {
+                    Log.e(KarooHeadwindExtension.TAG, "Error calculating bearing along route", e)
+                    return@mapNotNull null
+                }
+                val windBearing = interpolatedWeather.windDirection + 180
+                val diff = signedAngleDifference(bearingAlongRoute, windBearing)
+                val headwindSpeed = cos( (diff + 180) * Math.PI / 180.0) * interpolatedWeather.windSpeed
+
+                val headwindSpeedInUserUnit = if (isImperial) {
+                    headwindSpeed * 2.23694 // Convert m/s to mph
+                } else {
+                    headwindSpeed * 3.6 // Convert m/s to km/h
+                }
+
+                LineGraphBuilder.DataPoint(
+                    x = i.toFloat() * (windPoints.size / HEADWIND_SAMPLE_COUNT.toFloat()),
+                    y = headwindSpeedInUserUnit.toFloat()
+                )
+            }
+        } catch(e: Exception) {
+            Log.e(KarooHeadwindExtension.TAG, "Error calculating headwind points", e)
+            emptyList()
+        }
+
+        return LineGraphForecastData.LineData(buildSet {
+            if (headwindPoints.isNotEmpty()) {
+                add(LineGraphBuilder.Line(
+                    dataPoints = headwindPoints,
+                    color = android.graphics.Color.BLACK,
+                    label = "Head", // if (!isImperial) "Headwind km/h" else "Headwind mph",
+                    drawCircles = false,
+                    colorFunc = { headwindSpeed ->
+                        val headwindSpeedInKmh = headwindSpeed * 3.6 // Convert m/s to km/h
+                        interpolateWindLineColor(headwindSpeedInKmh, isNightMode(context), context).toArgb()
+                    },
+                    alpha = 255
+                ))
+            }
+        })
+    }
+
+    companion object {
+        const val HEADWIND_SAMPLE_COUNT = 70
+    }
+
+}

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/LineGraphForecastDataType.kt

@@ -1,8 +1,11 @@
 package de.timklge.karooheadwind.datatypes
 
 import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
 import android.util.Log
 import androidx.compose.ui.unit.DpSize
+import androidx.core.graphics.createBitmap
 import androidx.glance.GlanceModifier
 import androidx.glance.Image
 import androidx.glance.ImageProvider
@@ -14,6 +17,7 @@ import de.timklge.karooheadwind.HeadingResponse
 import de.timklge.karooheadwind.HeadwindSettings
 import de.timklge.karooheadwind.HeadwindWidgetSettings
 import de.timklge.karooheadwind.KarooHeadwindExtension
+import de.timklge.karooheadwind.R
 import de.timklge.karooheadwind.UpcomingRoute
 import de.timklge.karooheadwind.WeatherDataProvider
 import de.timklge.karooheadwind.getHeadingFlow
@@ -56,6 +60,11 @@ import kotlin.math.ceil
 import kotlin.math.floor
 
 abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemService, typeId: String) : DataTypeImpl("karoo-headwind", typeId) {
+    sealed class LineGraphForecastData {
+        data class LineData(val data: Set<LineGraphBuilder.Line>) : LineGraphForecastData()
+        data class Error(val message: String) : LineGraphForecastData()
+    }
+
     @OptIn(ExperimentalGlanceRemoteViewsApi::class)
     private val glance = GlanceRemoteViews()
 
@@ -70,8 +79,10 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
     abstract fun getLineData(
         lineData: List<LineData>,
         isImperial: Boolean,
-        upcomingRoute: UpcomingRoute?
+        upcomingRoute: UpcomingRoute?,
-    ): Set<LineGraphBuilder.Line>
+        isPreview: Boolean,
+        context: Context
+    ): LineGraphForecastData
 
     private fun previewFlow(settingsAndProfileStream: Flow<SettingsAndProfile>): Flow<StreamData> =
         flow {
@@ -90,6 +101,7 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
                         val forecastWindSpeed = 0.0 + (0..10).random()
                         val forecastWindDirection = 0.0 + (0..360).random()
                         val forecastWindGusts = 0.0 + (0..10).random()
+                        val forcastUvi = 0.0 + (0..12).random()
                         WeatherData(
                             time = forecastTime,
                             temperature = forecastTemperature,
@@ -104,7 +116,8 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
                             windGusts = forecastWindGusts,
                             weatherCode = forecastWeatherCode,
                             isForecast = true,
-                            isNight = it < 2
+                            isNight = it < 2,
+                            uvi = forcastUvi
                         )
                     }
 
@@ -126,7 +139,8 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
                             windGusts = 10.0,
                             weatherCode = WeatherInterpretation.getKnownWeatherCodes().random(),
                             isForecast = false,
-                            isNight = false
+                            isNight = false,
+                            uvi = 2.0
                         ),
                         coords = GpsCoordinates(0.0, 0.0, distanceAlongRoute = index * distancePerHour),
                         timezone = "UTC",
@@ -205,8 +219,7 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
         val viewJob = CoroutineScope(Dispatchers.IO).launch {
             emitter.onNext(ShowCustomStreamState("", null))
 
-            dataFlow.filter { it.isVisible }.collect { (allData, settingsAndProfile, widgetSettings, headingResponse, actualUpcomingRoute) ->
+            dataFlow.filter { it.isVisible }.collect { (allData, settingsAndProfile, _, headingResponse, upcomingRoute) ->
-                val upcomingRoute = if (allData?.provider == WeatherDataProvider.OPEN_METEO) actualUpcomingRoute else null
                 Log.d(KarooHeadwindExtension.TAG, "Updating weather forecast view")
 
                 if (allData?.data.isNullOrEmpty()){
@@ -261,31 +274,49 @@ abstract class LineGraphForecastDataType(private val karooSystem: KarooSystemSer
                         }
                     }
 
-                    val pointData = getLineData(data, settingsAndProfile.isImperialTemperature, upcomingRoute)
+                    val pointData = getLineData(
-                    val bitmap = LineGraphBuilder(context).drawLineGraph(config.viewSize.first, config.viewSize.second, config.gridSize.first, config.gridSize.second, pointData) { x ->
+                        data,
-                        val startTime = data.firstOrNull()?.time
+                        settingsAndProfile.isImperialTemperature,
-                        val time = startTime?.plus(floor(x).toLong(), ChronoUnit.HOURS)
+                        upcomingRoute,
-                        val timeLabel = getTimeFormatter(context).format(time?.atZone(ZoneId.systemDefault())?.toLocalTime())
+                        config.preview,
-                        val beforeData = data.getOrNull(floor(x).toInt().coerceAtLeast(0))
+                        context
-                        val afterData = data.getOrNull(ceil(x).toInt().coerceAtMost(data.size - 1))
+                    )
 
-                        if (beforeData?.distance != null || afterData?.distance != null) {
+                    when (pointData) {
-                            val start = beforeData?.distance ?: 0.0f
+                        is LineGraphForecastData.LineData -> {
-                            val end = (afterData?.distance ?: upcomingRoute?.routeLength?.toFloat()) ?: 0.0f
+                            val bitmap = LineGraphBuilder(context).drawLineGraph(config.viewSize.first, config.viewSize.second, config.gridSize.first, config.gridSize.second, pointData.data) { x ->
-                            val distance = start + (end - start) * (x - floor(x))
+                                val startTime = data.firstOrNull()?.time
-                            val distanceLabel = if (settingsAndProfile.isImperial) {
+                                val time = startTime?.plus(floor(x).toLong(), ChronoUnit.HOURS)
-                                "${(distance * 0.000621371).toInt()}"
+                                val timeLabel = getTimeFormatter(context).format(time?.atZone(ZoneId.systemDefault())?.toLocalTime())
-                            } else {
+                                val beforeData = data.getOrNull(floor(x).toInt().coerceAtLeast(0))
-                                "${(distance / 1000).toInt()}"
+                                val afterData = data.getOrNull(ceil(x).toInt().coerceAtMost(data.size - 1))
+
+                                if (beforeData?.distance != null || afterData?.distance != null) {
+                                    val start = beforeData?.distance ?: 0.0f
+                                    val end = (afterData?.distance ?: upcomingRoute?.routeLength?.toFloat()) ?: 0.0f
+                                    val distance = start + (end - start) * (x - floor(x))
+                                    val distanceLabel = if (settingsAndProfile.isImperial) {
+                                        "${(distance * 0.000621371).toInt()}"
+                                    } else {
+                                        "${(distance / 1000).toInt()}"
+                                    }
+                                    return@drawLineGraph distanceLabel
+                                } else {
+                                    timeLabel
+                                }
                             }
-                            return@drawLineGraph distanceLabel
-                        } else {
-                            timeLabel
-                        }
-                    }
 
-                    Box(modifier = GlanceModifier.fillMaxSize()){
+                            Box(modifier = GlanceModifier.fillMaxSize()){
-                        Image(ImageProvider(bitmap), "Forecast", modifier = GlanceModifier.fillMaxSize())
+                                Image(ImageProvider(bitmap), "Forecast", modifier = GlanceModifier.fillMaxSize())
+                            }
+                        }
+
+                        is LineGraphForecastData.Error -> {
+                            emitter.onNext(ShowCustomStreamState(pointData.message, null))
+                            Box(modifier = GlanceModifier.fillMaxSize()){
+
+                            }
+                        }
                     }
                 }
 

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/PrecipitationForecastDataType.kt

@@ -1,5 +1,6 @@
 package de.timklge.karooheadwind.datatypes
 
+import android.content.Context
 import de.timklge.karooheadwind.UpcomingRoute
 import de.timklge.karooheadwind.screens.LineGraphBuilder
 import io.hammerhead.karooext.KarooSystemService
@@ -8,8 +9,10 @@ class PrecipitationForecastDataType(karooSystem: KarooSystemService) : LineGraph
     override fun getLineData(
         lineData: List<LineData>,
         isImperial: Boolean,
-        upcomingRoute: UpcomingRoute?
+        upcomingRoute: UpcomingRoute?,
-    ): Set<LineGraphBuilder.Line> {
+        isPreview: Boolean,
+        context: Context
+    ): LineGraphForecastData {
         val precipitationPoints = lineData.map { data ->
             if (isImperial) { // Convert mm to inches
                 data.weatherData.precipitation * 0.0393701 // Convert mm to inches
@@ -22,7 +25,7 @@ class PrecipitationForecastDataType(karooSystem: KarooSystemService) : LineGraph
             (data.weatherData.precipitationProbability?.coerceAtMost(99.0)) ?: 0.0 // Max 99 % so that the label doesn't take up too much space
         }
 
-        return setOf(
+        return LineGraphForecastData.LineData(setOf(
             LineGraphBuilder.Line(
                 dataPoints = precipitationPoints.mapIndexed { index, value ->
                     LineGraphBuilder.DataPoint(index.toFloat(), value.toFloat())
@@ -39,7 +42,7 @@ class PrecipitationForecastDataType(karooSystem: KarooSystemService) : LineGraph
                 label = "%",
                 yAxis = LineGraphBuilder.YAxis.RIGHT
             )
-        )
+        ))
     }
 
 }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/RelativeElevationGainDataType.kt

@@ -30,7 +30,7 @@ class RelativeElevationGainDataType(private val karooSystemService: KarooSystemS
         val gradeDifferenceDueToWind = relativeGrade - actualGrade
         var intervalWindElevation = 0.0
 
-        if (gradeDifferenceDueToWind > 0) {
+        if (gradeDifferenceDueToWind > 0 && relativeGrade > 0) {
             val distanceCovered = riderSpeed * deltaTime
             intervalWindElevation = distanceCovered * gradeDifferenceDueToWind
         }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/RelativeGradeDataType.kt

@@ -4,11 +4,9 @@ import android.content.Context
 import android.util.Log
 import de.timklge.karooheadwind.HeadingResponse
 import de.timklge.karooheadwind.KarooHeadwindExtension
-import de.timklge.karooheadwind.WeatherDataProvider
 import de.timklge.karooheadwind.getRelativeHeadingFlow
 import de.timklge.karooheadwind.streamCurrentWeatherData
 import de.timklge.karooheadwind.streamDataFlow
-import de.timklge.karooheadwind.streamSettings
 import de.timklge.karooheadwind.streamUserProfile
 import de.timklge.karooheadwind.throttle
 import io.hammerhead.karooext.KarooSystemService
@@ -19,7 +17,6 @@ import io.hammerhead.karooext.models.DataPoint
 import io.hammerhead.karooext.models.DataType
 import io.hammerhead.karooext.models.StreamState
 import io.hammerhead.karooext.models.UpdateGraphicConfig
-import io.hammerhead.karooext.models.UserProfile
 import io.hammerhead.karooext.models.ViewConfig
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -36,12 +33,88 @@ import kotlin.math.cos
 class RelativeGradeDataType(private val karooSystemService: KarooSystemService, private val context: Context): DataTypeImpl("karoo-headwind", "relativeGrade") {
     data class RelativeGradeResponse(val relativeGrade: Double, val actualGrade: Double, val riderSpeed: Double)
 
+    data class ResistanceForces(
+        val airResistanceWithoutWind: Double,
+        val airResistanceWithWind: Double,
+        val rollingResistance: Double,
+        val gravitationalForce: Double
+    )
+
     companion object {
         // Default physical constants - adjust as needed
         const val DEFAULT_GRAVITY = 9.80665 // Acceleration due to gravity (m/s^2)
         const val DEFAULT_AIR_DENSITY = 1.225 // Air density at sea level, 15°C (kg/m^3)
         const val DEFAULT_CDA = 0.4 // Default coefficient of drag * frontal area (m^2). Varies significantly with rider position and equipment.
-        const val DEFAULT_BIKE_WEIGHT = 10.0 // Default bike weight (kg).
+        const val DEFAULT_BIKE_WEIGHT = 9.0 // Default bike weight (kg).
+        const val DEFAULT_CRR = 0.005 // Default coefficient of rolling resistance
+
+        /**
+         * Estimates the various resistance forces acting on a cyclist.
+         *
+         * @param actualGrade The current gradient of the road (unitless, e.g., 0.05 for 5%).
+         * @param riderSpeed The speed of the rider relative to the ground (m/s). Must be non-negative.
+         * @param windSpeed The speed of the wind relative to the ground (m/s). Must be non-negative.
+         * @param windDirectionDegrees The direction of the wind relative to the rider's direction
+         *                             of travel (degrees).
+         *                             0 = direct headwind, 90 = crosswind right,
+         *                             180 = direct tailwind, 270 = crosswind left.
+         * @param totalMass The combined mass of the rider and the bike (kg). Must be positive.
+         * @param cda The rider's coefficient of drag multiplied by their frontal area (m^2).
+         *            Defaults to DEFAULT_CDA. Represents aerodynamic efficiency.
+         * @param crr The coefficient of rolling resistance. Defaults to DEFAULT_CRR.
+         * @param airDensity The density of the air (kg/m^3). Defaults to DEFAULT_AIR_DENSITY.
+         * @param g The acceleration due to gravity (m/s^2). Defaults to DEFAULT_GRAVITY.
+         * @return A [ResistanceForces] object containing the calculated forces, or null
+         *         if input parameters are invalid.
+         */
+        fun estimateResistanceForces(
+            actualGrade: Double,
+            riderSpeed: Double,
+            windSpeed: Double,
+            windDirectionDegrees: Double,
+            totalMass: Double,
+            cda: Double = DEFAULT_CDA,
+            crr: Double = DEFAULT_CRR,
+            airDensity: Double = DEFAULT_AIR_DENSITY,
+            g: Double = DEFAULT_GRAVITY
+        ): ResistanceForces? {
+            // --- Input Validation ---
+            if (totalMass <= 0.0 || riderSpeed < 0.0 || windSpeed < 0.0 || g <= 0.0 || airDensity < 0.0 || cda < 0.0 || crr < 0.0) {
+                Log.w(KarooHeadwindExtension.TAG, "Warning: Invalid input parameters for force calculation.")
+                return null
+            }
+
+            // 1. Calculate wind component parallel to rider's direction
+            val windComponentParallel = windSpeed * cos(Math.toRadians(windDirectionDegrees))
+
+            // 2. Calculate effective air speed
+            val effectiveAirSpeed = riderSpeed + windComponentParallel
+
+            // 3. Calculate aerodynamic resistance factor
+            val aeroFactor = 0.5 * airDensity * cda
+
+            // 4. Calculate air resistance forces
+            // Drag Force = aeroFactor * speed^2 * sign(speed)
+            val airResistanceWithWind = aeroFactor * effectiveAirSpeed * abs(effectiveAirSpeed)
+            val airResistanceWithoutWind = aeroFactor * riderSpeed * abs(riderSpeed)
+
+            // 5. Calculate gravitational force (force due to slope)
+            // Decomposing the gravitational force along the slope
+            val gravitationalForce = totalMass * g * actualGrade
+
+            // 6. Calculate rolling resistance force
+            // This is simplified; in reality, it's perpendicular to the road surface.
+            // F_rolling = Crr * N = Crr * m * g * cos(arctan(grade))
+            // For small angles, cos(arctan(grade)) is close to 1, so we approximate.
+            val rollingResistance = totalMass * g * crr
+
+            return ResistanceForces(
+                airResistanceWithoutWind = airResistanceWithoutWind,
+                airResistanceWithWind = airResistanceWithWind,
+                rollingResistance = rollingResistance,
+                gravitationalForce = gravitationalForce
+            )
+        }
 
         /**
          * Estimates the "relative grade" experienced by a cyclist.
@@ -76,42 +149,42 @@ class RelativeGradeDataType(private val karooSystemService: KarooSystemService,
             airDensity: Double = DEFAULT_AIR_DENSITY,
             g: Double = DEFAULT_GRAVITY,
         ): Double {
-            // --- Input Validation ---
+            val forces = estimateResistanceForces(
-            if (totalMass <= 0.0 || riderSpeed < 0.0 || windSpeed < 0.0 || g <= 0.0 || airDensity < 0.0 || cda < 0.0) {
+                actualGrade,
-                Log.w(KarooHeadwindExtension.TAG, "Warning: Invalid input parameters. Mass/g must be positive; speeds, airDensity, Cda must be non-negative.")
+                riderSpeed,
+                windSpeed,
+                windDirectionDegrees,
+                totalMass,
+                cda,
+                DEFAULT_CRR,
+                airDensity,
+                g
+            )
+
+            if (forces == null) {
+                Log.w(KarooHeadwindExtension.TAG, "Could not calculate forces for relative grade.")
                 return Double.NaN
             }
+
             if (riderSpeed == 0.0 && windSpeed == 0.0) {
                 // If no movement and no wind, relative grade is just the actual grade
                 return actualGrade
             }
 
-            // 1. Calculate the component of wind speed parallel to the rider's direction of travel.
+            // The difference in force is purely from the wind.
-            //    cos(0 rad) = 1 (headwind), cos(PI rad) = -1 (tailwind)
+            // This difference in force, when equated to a change in gravitational force, gives the change in grade.
-            val windComponentParallel = windSpeed * cos(Math.toRadians(windDirectionDegrees))
+            // delta_F_air = F_air_with_wind - F_air_without_wind
-
+            // delta_F_air = m * g * delta_grade
-            // 2. Calculate the effective air speed the rider experiences.
+            // delta_grade = delta_F_air / (m * g)
-            //    This is rider speed + the parallel wind component.
+            // relative_grade = actual_grade + delta_grade
-            val effectiveAirSpeed = riderSpeed + windComponentParallel
+            val dragForceDifference = forces.airResistanceWithWind - forces.airResistanceWithoutWind
-
-            // 3. Calculate the aerodynamic resistance factor constant part.
-            val aeroFactor = 0.5 * airDensity * cda
-
-            // 4. Calculate the gravitational force component denominator.
             val gravitationalFactor = totalMass * g
 
-            // 5. Calculate the difference in the aerodynamic drag force term between
+            if (gravitationalFactor == 0.0) {
-            //    the current situation (with wind) and the hypothetical no-wind situation.
+                return actualGrade // Avoid division by zero
-            //    Drag Force = aeroFactor * effectiveAirSpeed * abs(effectiveAirSpeed)
+            }
-            //    We use speed * abs(speed) to ensure drag always opposes relative air motion.
-            val dragForceDifference = aeroFactor * ( (effectiveAirSpeed * abs(effectiveAirSpeed)) - (riderSpeed * abs(riderSpeed)) )
 
-            // 6. Calculate the relative grade.
+            return actualGrade + (dragForceDifference / gravitationalFactor)
-            //    It's the actual grade plus the equivalent grade change caused by the wind.
-            //    Equivalent Grade Change = Drag Force Difference / Gravitational Force Component
-            val relativeGrade = actualGrade + (dragForceDifference / gravitationalFactor)
-
-            return relativeGrade
         }
 
         suspend fun streamRelativeGrade(karooSystemService: KarooSystemService, context: Context): Flow<RelativeGradeResponse> {

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/ResistanceForcesDataType.kt

@@ -0,0 +1,185 @@
+package de.timklge.karooheadwind.datatypes
+
+import android.content.Context
+import android.util.Log
+import androidx.compose.ui.unit.DpSize
+import androidx.glance.ImageProvider
+import androidx.glance.appwidget.ExperimentalGlanceRemoteViewsApi
+import androidx.glance.appwidget.GlanceRemoteViews
+import androidx.glance.layout.Box
+import androidx.glance.layout.fillMaxSize
+import androidx.glance.GlanceModifier
+import androidx.glance.Image
+import de.timklge.karooheadwind.HeadingResponse
+import de.timklge.karooheadwind.KarooHeadwindExtension
+import de.timklge.karooheadwind.datatypes.RelativeGradeDataType.Companion.DEFAULT_BIKE_WEIGHT
+import de.timklge.karooheadwind.getRelativeHeadingFlow
+import de.timklge.karooheadwind.screens.BarChartBuilder
+import de.timklge.karooheadwind.streamCurrentWeatherData
+import de.timklge.karooheadwind.streamDataFlow
+import de.timklge.karooheadwind.streamUserProfile
+import de.timklge.karooheadwind.throttle
+import de.timklge.karooheadwind.weatherprovider.WeatherData
+import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.internal.ViewEmitter
+import io.hammerhead.karooext.models.DataType
+import io.hammerhead.karooext.models.ShowCustomStreamState
+import io.hammerhead.karooext.models.StreamState
+import io.hammerhead.karooext.models.UpdateGraphicConfig
+import io.hammerhead.karooext.models.UserProfile
+import io.hammerhead.karooext.models.ViewConfig
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.awaitCancellation
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.filterIsInstance
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+
+class ResistanceForcesDataType(val karooSystem: KarooSystemService, context: Context) : BaseDataType(karooSystem, context, "forces"){
+
+    override fun getValue(data: WeatherData, userProfile: UserProfile): Double {
+        return data.windDirection
+    }
+
+    private fun previewFlow(): Flow<RelativeGradeDataType.ResistanceForces> {
+        return flow {
+            while (true) {
+                val withoutWind = (0..300).random().toDouble()
+                emit(RelativeGradeDataType.ResistanceForces(
+                    withoutWind,
+                    withoutWind + (0..200).random().toDouble(),
+                    (0..50).random().toDouble(),
+                    (-100..500).random().toDouble()
+                ))
+                delay(1_000)
+            }
+        }
+    }
+
+    @OptIn(ExperimentalGlanceRemoteViewsApi::class)
+    override fun startView(context: Context, config: ViewConfig, emitter: ViewEmitter) {
+        val configJob = CoroutineScope(Dispatchers.IO).launch {
+            emitter.onNext(UpdateGraphicConfig(showHeader = false))
+            awaitCancellation()
+        }
+
+        val viewJob = CoroutineScope(Dispatchers.IO).launch {
+            emitter.onNext(ShowCustomStreamState("", null))
+
+            val flow = if (config.preview) {
+                previewFlow()
+            } else {
+                val relativeWindDirectionFlow = karooSystem.getRelativeHeadingFlow(context).filterIsInstance<HeadingResponse.Value>().map { it.diff + 180 }
+                val speedFlow = karooSystem.streamDataFlow(DataType.Type.SPEED).filterIsInstance<StreamState.Streaming>().map { it.dataPoint.singleValue ?: 0.0 }
+                val actualGradeFlow = karooSystem.streamDataFlow(DataType.Type.ELEVATION_GRADE).filterIsInstance<StreamState.Streaming>().map { it.dataPoint.singleValue }.filterNotNull().map { it / 100.0 } // Convert to decimal grade
+                val totalMassFlow = karooSystem.streamUserProfile().map {
+                    if (it.weight in 30.0f..300.0f){
+                        it.weight
+                    } else {
+                        Log.w(KarooHeadwindExtension.TAG, "Invalid rider weight ${it.weight} kg, defaulting to 70 kg")
+                        70.0f // Default to 70 kg if weight is invalid
+                    } + DEFAULT_BIKE_WEIGHT
+                }
+
+                val refreshRate = karooSystem.getRefreshRateInMilliseconds(context)
+
+                val windSpeedFlow = context.streamCurrentWeatherData(karooSystem).filterNotNull().map { weatherData ->
+                    weatherData.windSpeed
+                }
+
+                data class StreamValues(
+                    val relativeWindDirection: Double,
+                    val speed: Double,
+                    val windSpeed: Double,
+                    val actualGrade: Double,
+                    val totalMass: Double
+                )
+
+                combine(relativeWindDirectionFlow, speedFlow, windSpeedFlow, actualGradeFlow, totalMassFlow) { windDirection, speed, windSpeed, actualGrade, totalMass ->
+                    StreamValues(windDirection, speed, windSpeed, actualGrade, totalMass)
+                }.distinctUntilChanged().throttle(refreshRate).map { (windDirection, speed, windSpeed, actualGrade, totalMass) ->
+                    val resistanceForces = RelativeGradeDataType.estimateResistanceForces(
+                        actualGrade = actualGrade,
+                        riderSpeed = speed,
+                        windSpeed = windSpeed,
+                        windDirectionDegrees = windDirection,
+                        totalMass = totalMass
+                    )
+
+                    Log.d(KarooHeadwindExtension.TAG, "Resistance Forces: $resistanceForces")
+
+                    resistanceForces
+                }
+            }
+
+            val refreshRate = karooSystem.getRefreshRateInMilliseconds(context)
+
+            flow.throttle(refreshRate).collect { resistanceForces ->
+                if (resistanceForces != null) {
+                    // Create bar chart data
+                    val bars = listOf(
+                        BarChartBuilder.BarData(
+                            value = resistanceForces.airResistanceWithoutWind,
+                            label = "Air",
+                            smallLabel = "Air",
+                            color = 0xFF4CAF50.toInt() // Green
+                        ),
+                        BarChartBuilder.BarData(
+                            value = resistanceForces.airResistanceWithWind - resistanceForces.airResistanceWithoutWind,
+                            label = "Wind",
+                            smallLabel = "Wind",
+                            color = 0xFF2196F3.toInt() // Blue
+                        ),
+                        BarChartBuilder.BarData(
+                            value = resistanceForces.rollingResistance,
+                            label = "Roll",
+                            smallLabel = "R",
+                            color = 0xFFFF9800.toInt() // Orange
+                        ),
+                        BarChartBuilder.BarData(
+                            value = resistanceForces.gravitationalForce,
+                            label = "Gravity",
+                            smallLabel = "G",
+                            color = 0xFFF44336.toInt() // Red
+                        )
+                    )
+
+                    // Draw bar chart
+                    val bitmap = BarChartBuilder(context).drawBarChart(
+                        width = config.viewSize.first,
+                        height = config.viewSize.second,
+                        bars = bars,
+                        small = config.gridSize.first <= 30
+                    )
+
+                    // Use the correct ViewEmitter pattern with glance.compose
+                    val glance = GlanceRemoteViews()
+                    val result = glance.compose(context, DpSize.Unspecified) {
+                        Box(modifier = GlanceModifier.fillMaxSize()) {
+                            Image(
+                                ImageProvider(bitmap),
+                                "Resistance Forces Bar Chart",
+                                modifier = GlanceModifier.fillMaxSize()
+                            )
+                        }
+                    }
+                    emitter.updateView(result.remoteViews)
+                } else {
+                    // Display error message when no resistance forces data
+                    emitter.onNext(ShowCustomStreamState("No resistance data", null))
+                }
+            }
+        }
+
+        emitter.setCancellable {
+            configJob.cancel()
+            viewJob.cancel()
+        }
+    }
+}

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TailwindAndRideSpeedDataType.kt

@@ -16,6 +16,7 @@ import de.timklge.karooheadwind.HeadwindSettings
 import de.timklge.karooheadwind.KarooHeadwindExtension
 import de.timklge.karooheadwind.R
 import de.timklge.karooheadwind.getRelativeHeadingFlow
+import de.timklge.karooheadwind.screens.isNightMode
 import de.timklge.karooheadwind.streamCurrentWeatherData
 import de.timklge.karooheadwind.streamDataFlow
 import de.timklge.karooheadwind.streamDatatypeIsVisible
@@ -199,14 +200,10 @@ class TailwindAndRideSpeedDataType(
                     "$sign${headwindSpeedUserUnit.roundToInt().absoluteValue} ${windSpeedUserUnit.roundToInt()}${gustSpeedAddon}"
                 }
 
-
-                var dayColor = Color(ContextCompat.getColor(context, R.color.black))
-                var nightColor = Color(ContextCompat.getColor(context, R.color.white))
-
                 val headwindSpeed = cos( (windDirection + 180) * Math.PI / 180.0) * windSpeed
                 val windSpeedInKmh = headwindSpeed * 3.6
-                dayColor = interpolateWindColor(windSpeedInKmh, false, context)
+                val dayColor = interpolateWindColor(windSpeedInKmh, false, context)
-                nightColor = interpolateWindColor(windSpeedInKmh, true, context)
+                val nightColor = interpolateWindColor(windSpeedInKmh, true, context)
 
                 val result = glance.compose(context, DpSize.Unspecified) {
                     HeadwindDirection(

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/TemperatureForecastDataType.kt

@@ -1,5 +1,6 @@
 package de.timklge.karooheadwind.datatypes
 
+import android.content.Context
 import de.timklge.karooheadwind.UpcomingRoute
 import de.timklge.karooheadwind.screens.LineGraphBuilder
 import io.hammerhead.karooext.KarooSystemService
@@ -8,8 +9,10 @@ class TemperatureForecastDataType(karooSystem: KarooSystemService) : LineGraphFo
     override fun getLineData(
         lineData: List<LineData>,
         isImperial: Boolean,
-        upcomingRoute: UpcomingRoute?
+        upcomingRoute: UpcomingRoute?,
-    ): Set<LineGraphBuilder.Line> {
+        isPreview: Boolean,
+        context: Context
+    ): LineGraphForecastData {
         val linePoints = lineData.map { data ->
             if (isImperial) {
                 data.weatherData.temperature * 9 / 5 + 32 // Convert Celsius to Fahrenheit
@@ -18,7 +21,7 @@ class TemperatureForecastDataType(karooSystem: KarooSystemService) : LineGraphFo
             }
         }
 
-        return setOf(
+        return LineGraphForecastData.LineData(setOf(
             LineGraphBuilder.Line(
                 dataPoints = linePoints.mapIndexed { index, value ->
                     LineGraphBuilder.DataPoint(index.toFloat(), value.toFloat())
@@ -26,7 +29,7 @@ class TemperatureForecastDataType(karooSystem: KarooSystemService) : LineGraphFo
                 color = android.graphics.Color.RED,
                 label = if (!isImperial) "°C" else "°F",
             )
-        )
+        ))
     }
 
 }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/UviDataType.kt

@@ -0,0 +1,12 @@
+package de.timklge.karooheadwind.datatypes
+
+import android.content.Context
+import de.timklge.karooheadwind.weatherprovider.WeatherData
+import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.models.UserProfile
+
+class UviDataType(karooSystemService: KarooSystemService, context: Context) : BaseDataType(karooSystemService, context, "uvi"){
+    override fun getValue(data: WeatherData, userProfile: UserProfile): Double {
+        return data.uvi
+    }
+}

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/Views.kt

@@ -22,6 +22,10 @@ import androidx.glance.text.TextStyle
 import de.timklge.karooheadwind.HeadingResponse
 import de.timklge.karooheadwind.HeadwindSettings
 import de.timklge.karooheadwind.KarooHeadwindExtension
+import de.timklge.karooheadwind.streamSettings
+import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.models.HardwareType
+import kotlinx.coroutines.flow.first
 
 @OptIn(ExperimentalGlanceRemoteViewsApi::class)
 suspend fun getErrorWidget(glance: GlanceRemoteViews, context: Context, settings: HeadwindSettings?, headingResponse: HeadingResponse?): RemoteViewsCompositionResult {
@@ -75,4 +79,15 @@ suspend fun getErrorWidget(glance: GlanceRemoteViews, context: Context, errorCod
             )
         }
     }
+}
+
+suspend fun KarooSystemService.getRefreshRateInMilliseconds(context: Context): Long {
+    val refreshRate = context.streamSettings(this).first().refreshRate
+    val isK2 = hardwareType == HardwareType.K2
+
+    return if (isK2){
+        refreshRate.k2Ms
+    } else {
+        refreshRate.k3Ms
+    }
 }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/WeatherForecastDataType.kt

@@ -23,6 +23,7 @@ class WeatherForecastDataType(karooSystem: KarooSystemService) : ForecastDataTyp
         distance: Double?,
         isImperial: Boolean,
         isNight: Boolean,
+        uvi: Double,
     ) {
         Weather(
             arrowBitmap = arrowBitmap,

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/WindDirectionAndSpeedDataTypeCircle.kt

@@ -0,0 +1,145 @@
+package de.timklge.karooheadwind.datatypes
+
+import android.content.Context
+import android.graphics.BitmapFactory
+import android.util.Log
+import androidx.compose.ui.unit.DpSize
+import androidx.glance.appwidget.ExperimentalGlanceRemoteViewsApi
+import androidx.glance.appwidget.GlanceRemoteViews
+import de.timklge.karooheadwind.HeadingResponse
+import de.timklge.karooheadwind.HeadwindSettings
+import de.timklge.karooheadwind.KarooHeadwindExtension
+import de.timklge.karooheadwind.datatypes.WindDirectionAndSpeedDataType.StreamData
+import de.timklge.karooheadwind.getRelativeHeadingFlow
+import de.timklge.karooheadwind.streamCurrentWeatherData
+import de.timklge.karooheadwind.streamDatatypeIsVisible
+import de.timklge.karooheadwind.streamSettings
+import de.timklge.karooheadwind.streamUserProfile
+import de.timklge.karooheadwind.throttle
+import de.timklge.karooheadwind.util.msInUserUnit
+import de.timklge.karooheadwind.weatherprovider.WeatherData
+import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.extension.DataTypeImpl
+import io.hammerhead.karooext.internal.Emitter
+import io.hammerhead.karooext.internal.ViewEmitter
+import io.hammerhead.karooext.models.DataPoint
+import io.hammerhead.karooext.models.DataType
+import io.hammerhead.karooext.models.HardwareType
+import io.hammerhead.karooext.models.StreamState
+import io.hammerhead.karooext.models.UpdateGraphicConfig
+import io.hammerhead.karooext.models.UserProfile
+import io.hammerhead.karooext.models.ViewConfig
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.awaitCancellation
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.emitAll
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.launch
+import kotlin.math.cos
+import kotlin.math.roundToInt
+
+@OptIn(ExperimentalGlanceRemoteViewsApi::class)
+class WindDirectionAndSpeedDataTypeCircle(
+    private val karooSystem: KarooSystemService,
+    private val applicationContext: Context
+) : DataTypeImpl("karoo-headwind", "windDirectionAndSpeedCircle") {
+    private val glance = GlanceRemoteViews()
+
+    data class StreamData(val headingResponse: HeadingResponse, val absoluteWindDirection: Double?, val windSpeed: Double?, val settings: HeadwindSettings)
+
+    private fun previewFlow(profileFlow: Flow<UserProfile>): Flow<de.timklge.karooheadwind.datatypes.WindDirectionAndSpeedDataType.StreamData> {
+        return flow {
+            val profile = profileFlow.first()
+
+            while (true) {
+                val bearing = (0..360).random().toDouble()
+                val windSpeed = (0..10).random()
+                val gustSpeed = windSpeed * ((10..20).random().toDouble() / 10)
+                val isImperial = profile.preferredUnit.distance == UserProfile.PreferredUnit.UnitType.IMPERIAL
+
+                emit(StreamData(HeadingResponse.Value(bearing), bearing, windSpeed.toDouble(), HeadwindSettings(), gustSpeed = gustSpeed, isImperial = isImperial, isVisible = true))
+
+                delay(2_000)
+            }
+        }
+    }
+
+    override fun startView(context: Context, config: ViewConfig, emitter: ViewEmitter) {
+        Log.d(KarooHeadwindExtension.TAG, "Starting headwind direction view with $emitter")
+
+        val baseBitmap = BitmapFactory.decodeResource(
+            context.resources,
+            de.timklge.karooheadwind.R.drawable.circle
+        )
+
+        val configJob = CoroutineScope(Dispatchers.IO).launch {
+            emitter.onNext(UpdateGraphicConfig(showHeader = false))
+            awaitCancellation()
+        }
+
+        val flow = if (config.preview) {
+            previewFlow(karooSystem.streamUserProfile())
+        } else {
+            combine(karooSystem.getRelativeHeadingFlow(context),
+                context.streamCurrentWeatherData(karooSystem),
+                context.streamSettings(karooSystem),
+                karooSystem.streamUserProfile(),
+                karooSystem.streamDatatypeIsVisible(dataTypeId)
+            ) { headingResponse, weatherData, settings, userProfile, isVisible ->
+                val isImperial = userProfile.preferredUnit.distance == UserProfile.PreferredUnit.UnitType.IMPERIAL
+                val absoluteWindDirection = weatherData?.windDirection
+                val windSpeed = weatherData?.windSpeed
+                val gustSpeed = weatherData?.windGusts
+
+                StreamData(headingResponse, absoluteWindDirection, windSpeed, settings, isImperial = isImperial, gustSpeed = gustSpeed, isVisible = isVisible)
+            }
+        }
+
+        val viewJob = CoroutineScope(Dispatchers.IO).launch {
+            val refreshRate = karooSystem.getRefreshRateInMilliseconds(context)
+
+            flow.filter { it.isVisible }.throttle(refreshRate).collect { streamData ->
+                Log.d(KarooHeadwindExtension.TAG, "Updating headwind direction view")
+
+                val value = (streamData.headingResponse as? HeadingResponse.Value)?.diff
+                if (value == null || streamData.absoluteWindDirection == null || streamData.windSpeed == null){
+                    var headingResponse = streamData.headingResponse
+
+                    if (headingResponse is HeadingResponse.Value && (streamData.absoluteWindDirection == null || streamData.windSpeed == null)){
+                        headingResponse = HeadingResponse.NoWeatherData
+                    }
+
+                    emitter.updateView(getErrorWidget(glance, context, streamData.settings, headingResponse).remoteViews)
+
+                    return@collect
+                }
+
+                val windSpeed = streamData.windSpeed
+                val windSpeedUserUnit = msInUserUnit(windSpeed, streamData.isImperial)
+
+                val result = glance.compose(context, DpSize.Unspecified) {
+                    HeadwindDirection(
+                        baseBitmap,
+                        value.roundToInt(),
+                        config.textSize,
+                        windSpeedUserUnit.roundToInt().toString(),
+                        preview = config.preview,
+                        wideMode = false
+                    )
+                }
+
+                emitter.updateView(result.remoteViews)
+            }
+        }
+        emitter.setCancellable {
+            Log.d(KarooHeadwindExtension.TAG, "Stopping headwind view with $emitter")
+            configJob.cancel()
+            viewJob.cancel()
+        }
+    }
+}

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/WindForecastDataType.kt

@@ -1,12 +1,16 @@
 package de.timklge.karooheadwind.datatypes
 
+import android.content.Context
+import android.graphics.Color
 import android.util.Log
+import androidx.compose.ui.graphics.toArgb
 import com.mapbox.turf.TurfConstants
 import com.mapbox.turf.TurfMeasurement
 import de.timklge.karooheadwind.KarooHeadwindExtension
 import de.timklge.karooheadwind.UpcomingRoute
 import de.timklge.karooheadwind.lerpWeather
 import de.timklge.karooheadwind.screens.LineGraphBuilder
+import de.timklge.karooheadwind.screens.isNightMode
 import de.timklge.karooheadwind.util.signedAngleDifference
 import io.hammerhead.karooext.KarooSystemService
 import kotlin.math.ceil
@@ -22,8 +26,10 @@ class WindForecastDataType(karooSystem: KarooSystemService) : LineGraphForecastD
     override fun getLineData(
         lineData: List<LineData>,
         isImperial: Boolean,
-        upcomingRoute: UpcomingRoute?
+        upcomingRoute: UpcomingRoute?,
-    ): Set<LineGraphBuilder.Line> {
+        isPreview: Boolean,
+        context: Context
+    ): LineGraphForecastData {
         val windPoints = lineData.map { data ->
             if (isImperial) { // Convert m/s to mph
                 data.weatherData.windSpeed * 2.23694 // Convert m/s to mph
@@ -40,77 +46,22 @@ class WindForecastDataType(karooSystem: KarooSystemService) : LineGraphForecastD
             }
         }
 
-        val headwindPoints = try {
+        return LineGraphForecastData.LineData(buildSet {
-            if (upcomingRoute != null){
-                (0..<HEADWIND_SAMPLE_COUNT).mapNotNull { i ->
-                    val t = i / HEADWIND_SAMPLE_COUNT.toDouble()
-                    val beforeLineData = lineData.getOrNull(floor(lineData.size * t).toInt()) ?: lineData.firstOrNull()
-                    val afterLineData = lineData.getOrNull(ceil(lineData.size * t).toInt()) ?: lineData.lastOrNull()
-
-                    if (beforeLineData?.weatherData == null || afterLineData?.weatherData == null || beforeLineData.distance == null
-                        || afterLineData.distance == null) return@mapNotNull null
-
-                    val dt = remap(t.toFloat(),
-                        floor(lineData.size * t).toFloat() / lineData.size,
-                        ceil(lineData.size * t).toFloat() / lineData.size,
-                        0.0f, 1.0f
-                    ).toDouble()
-                    val interpolatedWeather = lerpWeather(beforeLineData.weatherData, afterLineData.weatherData, dt)
-                    val beforeDistanceAlongRoute = beforeLineData.distance
-                    val afterDistanceAlongRoute = afterLineData.distance
-                    val distanceAlongRoute = (beforeDistanceAlongRoute + (afterDistanceAlongRoute - beforeDistanceAlongRoute) * dt).coerceIn(0.0, upcomingRoute.routeLength)
-                    val coordsAlongRoute = TurfMeasurement.along(upcomingRoute.routePolyline, distanceAlongRoute, TurfConstants.UNIT_METERS)
-                    val nextCoordsAlongRoute = TurfMeasurement.along(upcomingRoute.routePolyline, distanceAlongRoute + 5, TurfConstants.UNIT_METERS)
-                    val bearingAlongRoute = TurfMeasurement.bearing(coordsAlongRoute, nextCoordsAlongRoute)
-                    val windBearing = interpolatedWeather.windDirection + 180
-                    val diff = signedAngleDifference(bearingAlongRoute, windBearing)
-                    val headwindSpeed = cos( (diff + 180) * Math.PI / 180.0) * interpolatedWeather.windSpeed
-
-                    val headwindSpeedInUserUnit = if (isImperial) {
-                        headwindSpeed * 2.23694 // Convert m/s to mph
-                    } else {
-                        headwindSpeed * 3.6 // Convert m/s to km/h
-                    }
-
-                    LineGraphBuilder.DataPoint(i.toFloat() * (windPoints.size / HEADWIND_SAMPLE_COUNT.toFloat()), headwindSpeedInUserUnit.toFloat())
-                }
-            } else {
-                emptyList()
-            }
-        } catch(e: Exception) {
-            Log.e(KarooHeadwindExtension.TAG, "Error calculating headwind points", e)
-            emptyList()
-        }
-
-        return buildSet {
-            add(LineGraphBuilder.Line(
-                dataPoints = windPoints.mapIndexed { index, value ->
-                    LineGraphBuilder.DataPoint(index.toFloat(), value.toFloat())
-                },
-                color = android.graphics.Color.GRAY,
-                label = "Wind" // if (!isImperial) "Wind km/h" else "Wind mph",
-            ))
             add(LineGraphBuilder.Line(
                 dataPoints = gustPoints.mapIndexed { index, value ->
                     LineGraphBuilder.DataPoint(index.toFloat(), value.toFloat())
                 },
-                color = android.graphics.Color.DKGRAY,
+                color = Color.DKGRAY,
                 label = "Gust" // if (!isImperial) "Gust km/h" else "Gust mph",
             ))
 
-            if (headwindPoints.isNotEmpty()) {
+            add(LineGraphBuilder.Line(
-                add(LineGraphBuilder.Line(
+                dataPoints = windPoints.mapIndexed { index, value ->
-                    dataPoints = headwindPoints,
+                    LineGraphBuilder.DataPoint(index.toFloat(), value.toFloat())
-                    color = android.graphics.Color.MAGENTA,
+                },
-                    label = "Headwind", // if (!isImperial) "Headwind km/h" else "Headwind mph",
+                color = Color.GRAY,
-                    drawCircles = false
+                label = "Wind" // if (!isImperial) "Wind km/h" else "Wind mph",
-                ))
+            ))
-            }
+        })
-        }
     }
-
-    companion object {
-        const val HEADWIND_SAMPLE_COUNT = 30
-    }
-
 }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/WindGustsDataType.kt

@@ -3,10 +3,15 @@ package de.timklge.karooheadwind.datatypes
 import android.content.Context
 import de.timklge.karooheadwind.weatherprovider.WeatherData
 import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.models.DataType
 import io.hammerhead.karooext.models.UserProfile
 
 class WindGustsDataType(karooSystemService: KarooSystemService, context: Context) : BaseDataType(karooSystemService, context, "windGusts"){
     override fun getValue(data: WeatherData, userProfile: UserProfile): Double {
         return data.windGusts
     }
+
+    override fun getFormatDataType(): String {
+        return DataType.Type.SPEED
+    }
 }

app/src/main/kotlin/de/timklge/karooheadwind/datatypes/WindSpeedDataType.kt

@@ -3,10 +3,15 @@ package de.timklge.karooheadwind.datatypes
 import android.content.Context
 import de.timklge.karooheadwind.weatherprovider.WeatherData
 import io.hammerhead.karooext.KarooSystemService
+import io.hammerhead.karooext.models.DataType
 import io.hammerhead.karooext.models.UserProfile
 
 class WindSpeedDataType(karooSystemService: KarooSystemService, context: Context) : BaseDataType(karooSystemService, context, "windSpeed"){
     override fun getValue(data: WeatherData, userProfile: UserProfile): Double {
         return data.windSpeed
     }
+
+    override fun getFormatDataType(): String {
+        return DataType.Type.SPEED
+    }
 }

app/src/main/kotlin/de/timklge/karooheadwind/screens/BarChart.kt

@@ -0,0 +1,154 @@
+package de.timklge.karooheadwind.screens
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.graphics.RectF
+import androidx.annotation.ColorInt
+import androidx.core.graphics.createBitmap
+import kotlin.math.abs
+
+class BarChartBuilder(val context: Context) {
+
+    data class BarData(
+        val value: Double,
+        val label: String,
+        val smallLabel: String,
+        @ColorInt val color: Int
+    )
+
+    fun drawBarChart(
+        width: Int,
+        height: Int,
+        small: Boolean,
+        bars: List<BarData>
+    ): Bitmap {
+        val bitmap = createBitmap(width, height)
+        val canvas = Canvas(bitmap)
+        val isNightMode = isNightMode(context)
+
+        val backgroundColor = if (isNightMode) Color.BLACK else Color.WHITE
+        val primaryTextColor = if (isNightMode) Color.WHITE else Color.BLACK
+
+        canvas.drawColor(backgroundColor)
+
+        if (bars.isEmpty()) {
+            val emptyPaint = Paint().apply {
+                color = primaryTextColor
+                textSize = 30f
+                textAlign = Paint.Align.CENTER
+                isAntiAlias = true
+            }
+            canvas.drawText("No data to display", width / 2f, height / 2f, emptyPaint)
+            return bitmap
+        }
+
+        val marginTop = 45f
+        val marginBottom = 45f
+        val marginLeft = 5f
+        val marginRight = 5f
+
+        // Find the maximum absolute value to determine scale
+        val maxValue = bars.maxOfOrNull { abs(it.value) } ?: 1.0
+        val minValue = bars.minOfOrNull { it.value } ?: 0.0
+
+        // Determine if we need to show negative values
+        val hasNegativeValues = minValue < 0
+
+        val chartWidth = width - marginLeft - marginRight
+        val chartHeight = height - marginTop - marginBottom
+        val chartLeft = marginLeft
+        val chartTop = marginTop
+        val chartBottom = if (hasNegativeValues) height - marginBottom else height - 5.0f
+
+        val zeroY = if (hasNegativeValues) {
+            chartTop + chartHeight * (maxValue / (maxValue - minValue)).toFloat()
+        } else {
+            chartBottom
+        }
+
+        // Calculate bar dimensions
+        val barSpacing = 10f
+        val totalSpacing = (bars.size - 1) * barSpacing
+        val barWidth = (chartWidth - totalSpacing) / bars.size
+
+        // Draw bars
+        val barPaint = Paint().apply {
+            isAntiAlias = true
+            style = Paint.Style.FILL
+        }
+
+        bars.forEachIndexed { index, bar ->
+            val barLeft = chartLeft + index * (barWidth + barSpacing)
+            val barRight = barLeft + barWidth
+
+            val barHeight = if (hasNegativeValues) {
+                (abs(bar.value) / (maxValue - minValue) * chartHeight).toFloat()
+            } else {
+                (bar.value / maxValue * chartHeight).toFloat()
+            }
+
+            val barTop = if (bar.value >= 0) {
+                zeroY - barHeight
+            } else {
+                zeroY
+            }
+
+            val barBottom = if (bar.value >= 0) {
+                zeroY
+            } else {
+                zeroY + barHeight
+            }
+
+            // Draw bar
+            barPaint.color = bar.color
+            val rect = RectF(barLeft, barTop, barRight, barBottom)
+            canvas.drawRect(rect, barPaint)
+
+            // Draw label where value used to be with increased font size
+            val labelPaint = Paint().apply {
+                color = primaryTextColor
+                textSize = 32f  // Increased from 24f and 28f
+                textAlign = Paint.Align.CENTER
+                isAntiAlias = true
+            }
+
+            // Use smallLabel if small is true, otherwise use regular label
+            val labelToUse = if (small) bar.smallLabel else bar.label
+
+            val labelY = if (bar.value >= 0) {
+                barTop - 10f  // Position above positive bars
+            } else {
+                barBottom + labelPaint.textSize + 10f  // Position below negative bars
+            }
+
+            // Create semi-transparent background box for label
+            val backgroundPaint = Paint().apply {
+                color = if (isNightMode) Color.argb(200, 0, 0, 0) else Color.argb(200, 255, 255, 255)
+                style = Paint.Style.FILL
+                isAntiAlias = true
+            }
+
+            // Calculate text bounds for background box
+            val textBounds = android.graphics.Rect()
+            labelPaint.getTextBounds(labelToUse, 0, labelToUse.length, textBounds)
+
+            val padding = 8f
+            val boxLeft = barLeft + barWidth / 2f - textBounds.width() / 2f - padding
+            val boxRight = barLeft + barWidth / 2f + textBounds.width() / 2f + padding
+            val boxTop = labelY - textBounds.height() - padding / 2f
+            val boxBottom = labelY + padding / 2f
+
+            // Draw rounded rectangle background
+            val backgroundRect = RectF(boxLeft, boxTop, boxRight, boxBottom)
+            val cornerRadius = 6f
+            canvas.drawRoundRect(backgroundRect, cornerRadius, cornerRadius, backgroundPaint)
+
+            canvas.drawText(labelToUse, barLeft + barWidth / 2f, labelY, labelPaint)
+        }
+
+        return bitmap
+    }
+}

app/src/main/kotlin/de/timklge/karooheadwind/screens/LineGraph.kt

@@ -9,30 +9,33 @@ import android.graphics.Paint
 import android.graphics.Paint.Align
 import android.graphics.Path
 import androidx.annotation.ColorInt
-import kotlin.math.abs
 import androidx.core.graphics.createBitmap
+import kotlin.math.abs
+import kotlin.math.floor
 import kotlin.math.roundToInt
 
+fun isNightMode(context: Context): Boolean {
+    val nightModeFlags = context.resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK
+    return nightModeFlags == Configuration.UI_MODE_NIGHT_YES
+}
+
 class LineGraphBuilder(val context: Context) {
     enum class YAxis {
         LEFT, RIGHT
     }
 
-    data class DataPoint(val x: Float, val y: Float)
+    data class DataPoint(val x: Float, val y: Float) // color field removed
 
     data class Line(
-        val dataPoints: List<DataPoint>,
+        val dataPoints: List<DataPoint>, // DataPoint type is now the new one
         @ColorInt val color: Int,
         val label: String? = null,
         val yAxis: YAxis = YAxis.LEFT, // Default to left Y-axis
-        val drawCircles: Boolean = true // Default to true
+        val drawCircles: Boolean = true, // Default to true
+        val colorFunc: ((Float) -> Int)? = null, // Optional color function for dynamic colors,
+        val alpha: Int = 80
     )
 
-    private fun isNightMode(): Boolean {
-        val nightModeFlags = context.resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK
-        return nightModeFlags == Configuration.UI_MODE_NIGHT_YES
-    }
-
     fun drawLineGraph(
         width: Int,
         height: Int,
@@ -41,10 +44,9 @@ class LineGraphBuilder(val context: Context) {
         lines: Set<Line>,
         labelProvider: ((Float) -> String)
     ): Bitmap {
-        val isNightMode = isNightMode()
-
         val bitmap = createBitmap(width, height)
         val canvas = Canvas(bitmap)
+        val isNightMode = isNightMode(context)
 
         val backgroundColor = if (isNightMode) Color.BLACK else Color.WHITE
         val primaryTextColor = if (isNightMode) Color.WHITE else Color.BLACK
@@ -287,7 +289,7 @@ class LineGraphBuilder(val context: Context) {
             if (!hasRightYAxisData || abs(effectiveMaxYRight - effectiveMinYRight) < 0.0001f) 1f else (effectiveMaxYRight - effectiveMinYRight)
 
         fun mapX(originalX: Float): Float {
-            return graphLeft + ((originalX - effectiveMinX) / rangeX) * graphWidth
+            return floor(graphLeft + ((originalX - effectiveMinX) / rangeX) * graphWidth)
         }
 
         fun mapYLeft(originalY: Float): Float {
@@ -347,41 +349,119 @@ class LineGraphBuilder(val context: Context) {
         for (line in lines) {
             if (line.dataPoints.isEmpty()) continue
 
-            linePaint.color = line.color
-            val path = Path()
-            val firstPoint = line.dataPoints.first()
             val mapY = if (line.yAxis == YAxis.LEFT) ::mapYLeft else ::mapYRight
 
-            path.moveTo(mapX(firstPoint.x), mapY(firstPoint.y))
+            // Draw area between line and X axis, colorized per segment (match line colorization)
-            if (line.drawCircles) {
+            val zeroY = mapY((if (line.yAxis == YAxis.LEFT) effectiveMinYLeft else effectiveMinYRight).coerceAtLeast(0f))
-                canvas.drawCircle(
-                    mapX(firstPoint.x),
-                    mapY(firstPoint.y),
-                    8f,
-                    linePaint.apply { style = Paint.Style.FILL })
-            }
-            linePaint.style = Paint.Style.STROKE
-
             for (i in 1 until line.dataPoints.size) {
-                val point = line.dataPoints[i]
+                val prev = line.dataPoints[i - 1]
-                path.lineTo(mapX(point.x), mapY(point.y))
+                val curr = line.dataPoints[i]
-                if (line.drawCircles) {
+                if (line.colorFunc != null) {
-                    canvas.drawCircle(
+                    val N = 4 // Number of sub-segments (tweak for smoothness/performance)
-                        mapX(point.x),
+                    val adjustment = 0.5f // Pixel adjustment to help close seams
-                        mapY(point.y),
+
-                        8f,
+                    for (j in 0 until N) {
-                        linePaint.apply { style = Paint.Style.FILL })
+                        val t0 = j / N.toFloat()
+                        val t1 = (j + 1) / N.toFloat()
+                        val x0 = prev.x + (curr.x - prev.x) * t0
+                        val y0 = prev.y + (curr.y - prev.y) * t0
+                        val x1 = prev.x + (curr.x - prev.x) * t1
+                        val y1 = prev.y + (curr.y - prev.y) * t1
+                        val color0 = line.colorFunc.invoke(y0)
+
+                        val mappedX0 = mapX(x0)
+                        val mappedY0 = mapY(y0)
+                        val mappedX1 = mapX(x1)
+                        val mappedY1 = mapY(y1)
+
+                        // Extend the right edge of internal sub-segments to create an overlap
+                        val rightEdgeX = if (j < N - 1) mappedX1 + adjustment else mappedX1
+
+                        val areaPath = Path().apply {
+                            moveTo(mappedX0, mappedY0)
+                            lineTo(rightEdgeX, mappedY1)
+                            lineTo(rightEdgeX, zeroY)
+                            lineTo(mappedX0, zeroY)
+                            close()
+                        }
+                        val areaPaint = Paint().apply {
+                            style = Paint.Style.FILL
+                            color = color0
+                            isAntiAlias = true
+                            alpha = line.alpha
+                        }
+                        canvas.drawPath(areaPath, areaPaint)
+                    }
+                } else {
+                    val areaPath = Path().apply {
+                        moveTo(mapX(prev.x), mapY(prev.y))
+                        lineTo(mapX(curr.x), mapY(curr.y))
+                        lineTo(mapX(curr.x), zeroY)
+                        lineTo(mapX(prev.x), zeroY)
+                        close()
+                    }
+                    val areaPaint = Paint().apply {
+                        style = Paint.Style.FILL
+                        color = line.color
+                        isAntiAlias = true
+                        alpha = line.alpha
+                    }
+                    canvas.drawPath(areaPath, areaPaint)
                 }
-                linePaint.style = Paint.Style.STROKE
             }
 
-            canvas.drawPath(path, linePaint)
+            // Draw the line, colorized per segment (improved: split for colorFunc)
+            for (i in 1 until line.dataPoints.size) {
+                val prev = line.dataPoints[i - 1]
+                val curr = line.dataPoints[i]
+                if (line.colorFunc != null) {
+                    val N = 4 // Number of sub-segments (tweak for smoothness/performance)
+                    for (j in 0 until N) {
+                        val t0 = j / N.toFloat()
+                        val t1 = (j + 1) / N.toFloat()
+                        val x0 = prev.x + (curr.x - prev.x) * t0
+                        val y0 = prev.y + (curr.y - prev.y) * t0
+                        val x1 = prev.x + (curr.x - prev.x) * t1
+                        val y1 = prev.y + (curr.y - prev.y) * t1
+                        val color0 = line.colorFunc.invoke(y0)
+                        // Optionally, blend color0 and color1 for the segment, or just use color0
+                        val segPaint = Paint(linePaint).apply {
+                            color = color0
+                        }
+                        canvas.drawLine(
+                            mapX(x0), mapY(y0),
+                            mapX(x1), mapY(y1),
+                            segPaint
+                        )
+                    }
+                } else {
+                    val segPaint = Paint(linePaint).apply {
+                        color = line.color
+                    }
+                    canvas.drawLine(
+                        mapX(prev.x), mapY(prev.y),
+                        mapX(curr.x), mapY(curr.y),
+                        segPaint
+                    )
+                }
+            }
+
+            // Draw circles if enabled
+            if (line.drawCircles) {
+                for (point in line.dataPoints) {
+                    val circlePaint = Paint(linePaint).apply {
+                        style = Paint.Style.FILL
+                        color = line.colorFunc?.invoke(point.y) ?: line.color
+                    }
+                    canvas.drawCircle(mapX(point.x), mapY(point.y), 8f, circlePaint)
+                }
+            }
         }
 
         // Draw Left Y-axis ticks and labels
         if (hasLeftYAxisData) {
             textPaint.textAlign = Align.RIGHT
-            val numYTicks = if (gridWidth > 15) 2 else 1
+            val numYTicks = if (gridHeight > 15) (gridHeight / 10) else 1
             if (abs(dataMaxYLeft - dataMinYLeft) > 0.0001f) {
                 for (i in 0..numYTicks) {
                     val value = dataMinYLeft + ((dataMaxYLeft - dataMinYLeft) / numYTicks) * i

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/WeatherData.kt

@@ -17,6 +17,7 @@ data class WeatherData(
     val windGusts: Double,
     val weatherCode: Int,
     val isForecast: Boolean,
-    val isNight: Boolean
+    val isNight: Boolean,
+    val uvi: Double,
 )
 

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openmeteo/OpenMeteoWeatherData.kt

@@ -18,6 +18,7 @@ data class OpenMeteoWeatherData(
     @SerialName("wind_gusts_10m") val windGusts: Double,
     @SerialName("weather_code") val weatherCode: Int,
     @SerialName("is_day") val isDay: Int,
+    @SerialName("uv_index") val uvi: Double,
 ) {
     fun toWeatherData(): WeatherData = WeatherData(
         temperature = temperature,
@@ -33,6 +34,7 @@ data class OpenMeteoWeatherData(
         time = time,
         isForecast = false,
         isNight = isDay == 0,
+        uvi = uvi
     )
 }
 

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openmeteo/OpenMeteoWeatherForecastData.kt

@@ -19,6 +19,7 @@ data class OpenMeteoWeatherForecastData(
     @SerialName("pressure_msl") val sealevelPressure: List<Double>,
     @SerialName("is_day") val isDay: List<Int>,
     @SerialName("relative_humidity_2m") val relativeHumidity: List<Int>,
+    @SerialName("uv_index") val uvi: List<Double>,
     ) {
     fun toWeatherData(): List<WeatherData> {
         return time.mapIndexed { index, t ->
@@ -37,6 +38,7 @@ data class OpenMeteoWeatherForecastData(
                 surfacePressure = surfacePressure[index],
                 sealevelPressure = sealevelPressure[index],
                 relativeHumidity = relativeHumidity[index],
+                uvi = uvi[index]
             )
         }
     }

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openmeteo/OpenMeteoWeatherProvider.kt

@@ -30,7 +30,7 @@ class OpenMeteoWeatherProvider : WeatherProvider {
             // https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&current=is_day,surface_pressure,pressure_msl,temperature_2m,relative_humidity_2m,precipitation,weather_code,cloud_cover,wind_speed_10m,wind_direction_10m,wind_gusts_10m&hourly=temperature_2m,precipitation_probability,precipitation,weather_code,wind_speed_10m,wind_direction_10m,wind_gusts_10m&timeformat=unixtime&past_hours=1&forecast_days=1&forecast_hours=12
             val lats = gpsCoordinates.joinToString(",") { String.format(Locale.US, "%.6f", it.lat) }
             val lons = gpsCoordinates.joinToString(",") { String.format(Locale.US, "%.6f", it.lon) }
-            val url = "https://api.open-meteo.com/v1/forecast?latitude=${lats}&longitude=${lons}&current=is_day,surface_pressure,pressure_msl,temperature_2m,relative_humidity_2m,precipitation,weather_code,cloud_cover,wind_speed_10m,wind_direction_10m,wind_gusts_10m&hourly=temperature_2m,precipitation_probability,precipitation,weather_code,wind_speed_10m,wind_direction_10m,wind_gusts_10m,is_day,surface_pressure,pressure_msl,relative_humidity_2m,cloud_cover&timeformat=unixtime&past_hours=0&forecast_days=1&forecast_hours=12&wind_speed_unit=ms"
+            val url = "https://api.open-meteo.com/v1/forecast?latitude=${lats}&longitude=${lons}&current=is_day,surface_pressure,pressure_msl,uv_index,temperature_2m,relative_humidity_2m,precipitation,weather_code,cloud_cover,wind_speed_10m,wind_direction_10m,wind_gusts_10m&hourly=uv_index,temperature_2m,precipitation_probability,precipitation,weather_code,wind_speed_10m,wind_direction_10m,wind_gusts_10m,is_day,surface_pressure,pressure_msl,relative_humidity_2m,cloud_cover&timeformat=unixtime&past_hours=0&forecast_days=1&forecast_hours=12&wind_speed_unit=ms"
 
             Log.d(KarooHeadwindExtension.TAG, "Http request to ${url}...")
 

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openweathermap/OpenWeatherMapForecastData.kt

@@ -20,7 +20,8 @@ data class OpenWeatherMapForecastData(
     val pop: Double,
     val rain: Rain? = null,
     val snow: Snow? = null,
-    val weather: List<Weather>
+    val weather: List<Weather>,
+    val uvi: Double,
 ) {
     fun toWeatherData(currentWeatherData: OpenWeatherMapWeatherData): WeatherData {
         val dtInstant = Instant.ofEpochSecond(dt)
@@ -32,6 +33,7 @@ data class OpenWeatherMapForecastData(
         val sunsetTime = sunsetInstant.atZone(ZoneOffset.UTC).toLocalTime()
 
         return WeatherData(
+            uvi = uvi,
             temperature = temp,
             relativeHumidity = humidity,
             precipitation = rain?.h1 ?: 0.0,

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openweathermap/OpenWeatherMapWeatherData.kt

@@ -19,9 +19,11 @@ data class OpenWeatherMapWeatherData(
     val wind_gust: Double? = null,
     val rain: Rain? = null,
     val snow: Snow? = null,
+    val uvi: Double,
     val weather: List<Weather>){
 
     fun toWeatherData(): WeatherData = WeatherData(
+        uvi = uvi,
         temperature = temp,
         relativeHumidity = humidity,
         precipitation = rain?.h1 ?: 0.0,

app/src/main/kotlin/de/timklge/karooheadwind/weatherprovider/openweathermap/OpenWeatherMapWeatherProvider.kt

@@ -6,7 +6,6 @@ import de.timklge.karooheadwind.KarooHeadwindExtension
 import de.timklge.karooheadwind.WeatherDataProvider
 import de.timklge.karooheadwind.datatypes.GpsCoordinates
 import de.timklge.karooheadwind.jsonWithUnknownKeys
-import de.timklge.karooheadwind.weatherprovider.WeatherDataForLocation
 import de.timklge.karooheadwind.weatherprovider.WeatherDataResponse
 import de.timklge.karooheadwind.weatherprovider.WeatherProvider
 import de.timklge.karooheadwind.weatherprovider.WeatherProviderException
@@ -17,12 +16,14 @@ import io.hammerhead.karooext.models.UserProfile
 import kotlinx.coroutines.FlowPreview
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.single
 import kotlinx.coroutines.flow.timeout
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import kotlin.math.absoluteValue
 import kotlin.time.Duration.Companion.seconds
 
 
@@ -48,6 +49,8 @@ data class Snow(
 
 class OpenWeatherMapWeatherProvider(private val apiKey: String) : WeatherProvider {
     companion object {
+        private const val MAX_API_CALLS = 3
+
         fun convertWeatherCodeToOpenMeteo(owmCode: Int): Int {
             // Mapping OpenWeatherMap to WMO OpenMeteo
             return when (owmCode) {
@@ -67,37 +70,68 @@ class OpenWeatherMapWeatherProvider(private val apiKey: String) : WeatherProvide
         coordinates: List<GpsCoordinates>,
         settings: HeadwindSettings,
         profile: UserProfile?
-    ): WeatherDataResponse {
+    ): WeatherDataResponse = coroutineScope {
+        val selectedCoordinates = coordinates.take((MAX_API_CALLS - 1).coerceAtLeast(1)).toMutableList()
 
-        val response = makeOpenWeatherMapRequest(karooSystem, coordinates, apiKey)
+        if (coordinates.isNotEmpty() && !selectedCoordinates.contains(coordinates.last())){
-        val responseBody = response.body?.let { String(it) } ?: throw Exception("Null response from OpenWeatherMap")
+            selectedCoordinates.add(coordinates.last())
+        }
 
-        val responses = mutableListOf<WeatherDataForLocation>()
+        Log.d(KarooHeadwindExtension.TAG, "OpenWeatherMap: searching for ${selectedCoordinates.size} locations from ${coordinates.size} total")
+        selectedCoordinates.forEachIndexed { index, coord ->
+            Log.d(KarooHeadwindExtension.TAG, "Point #$index: ${coord.lat}, ${coord.lon}, distance: ${coord.distanceAlongRoute}")
+        }
 
-        val openWeatherMapWeatherDataForLocation = jsonWithUnknownKeys.decodeFromString<OpenWeatherMapWeatherDataForLocation>(responseBody)
+        val weatherDataForSelectedLocations = buildList {
-        responses.add(openWeatherMapWeatherDataForLocation.toWeatherDataForLocation(null))
+            for (coordinate in selectedCoordinates){
+                val response = makeOpenWeatherMapRequest(karooSystem, coordinate, apiKey)
+                val responseBody = response.body?.let { String(it) }
+                    ?: throw WeatherProviderException(response.statusCode, "Null Response from OpenWeatherMap")
 
-        // FIXME Route forecast
+                val weatherData = jsonWithUnknownKeys.decodeFromString<OpenWeatherMapWeatherDataForLocation>(responseBody)
 
-        return WeatherDataResponse(
+                add(coordinate to weatherData)
+            }
+        }
+
+        val allLocationData = coordinates.map { originalCoord ->
+            val directMatch = weatherDataForSelectedLocations.find { it.first == originalCoord }
+
+            if (directMatch != null) {
+                directMatch.second.toWeatherDataForLocation(originalCoord.distanceAlongRoute)
+            } else {
+
+                val closestCoord = weatherDataForSelectedLocations.minByOrNull { (coord, _) ->
+                    if (originalCoord.distanceAlongRoute != null && coord.distanceAlongRoute != null) {
+                        (originalCoord.distanceAlongRoute - coord.distanceAlongRoute).absoluteValue
+                    } else {
+                        originalCoord.distanceTo(coord)
+                    }
+                } ?: throw WeatherProviderException(500, "Error finding nearest coordinate")
+
+
+                closestCoord.second.toWeatherDataForLocation(originalCoord.distanceAlongRoute)
+            }
+        }
+
+        WeatherDataResponse(
             provider = WeatherDataProvider.OPEN_WEATHER_MAP,
-            data = responses
+            data = allLocationData
         )
     }
 
+
     @OptIn(FlowPreview::class)
     private suspend fun makeOpenWeatherMapRequest(
         service: KarooSystemService,
-        coordinates: List<GpsCoordinates>,
+        coordinate: GpsCoordinates,
         apiKey: String
     ): HttpResponseState.Complete {
         val response = callbackFlow {
-            // OpenWeatherMap only supports setting imperial or metric units for all measurements, not individually for distance / temperature
-            val coordinate = coordinates.first()
 
             // URL API 3.0 with onecall endpoint
             val url = "https://api.openweathermap.org/data/3.0/onecall?lat=${coordinate.lat}&lon=${coordinate.lon}" +
-                "&appid=$apiKey&exclude=minutely,daily,alerts&units=metric"
+                    "&appid=$apiKey&exclude=minutely,daily,alerts&units=metric"
 
             Log.d(KarooHeadwindExtension.TAG, "Http request to OpenWeatherMap API 3.0: $url")
 

app/src/main/res/values/colors.xml

@@ -5,6 +5,7 @@
 
     <color name="white">#ffffff</color>
     <color name="black">#000000</color>
+    <color name="gray">#808080</color>
 
     <color name="green">#00ff00</color>
     <color name="orange">#ff9930</color>

app/src/main/res/values/strings.xml

@@ -10,11 +10,11 @@
     <string name="cloudCover">Cloud cover</string>
     <string name="cloudCover_description">Current cloud cover in percent</string>
     <string name="windSpeed">Wind speed</string>
-    <string name="windSpeed_description">Current wind speed in configured unit</string>
+    <string name="windSpeed_description">Current absolute wind speed</string>
     <string name="windGusts">Wind gusts</string>
     <string name="windGusts_description">Current wind gust speed in configured unit</string>
     <string name="windDirection">Absolute wind direction</string>
-    <string name="windDirection_description">Current wind direction</string>
+    <string name="windDirection_description">Current absolute wind direction</string>
     <string name="precipitation">Rainfall</string>
     <string name="precipitation_description">Current precipitation (rainfall / snowfall)</string>
     <string name="surfacePressure">Surface pressure</string>
@@ -22,11 +22,15 @@
     <string name="sealevelPressure">Sealevel pressure</string>
     <string name="sealevelPressure_description">Atmospheric pressure at sea level in configured unit</string>
     <string name="weather_forecast">Weather Forecast</string>
+    <string name="uvi">UV Index</string>
+    <string name="uvi_description">Current UV Index at current location</string>
     <string name="weather_forecast_description">Current hourly weather forecast</string>
     <string name="temperature_forecast">Temperature Forecast</string>
     <string name="temperature_forecast_description">Current hourly temperature forecast</string>
     <string name="wind_forecast">Wind Forecast</string>
     <string name="wind_forecast_description">Current hourly wind forecast</string>
+    <string name="headwind_forecast">Headwind Forecast</string>
+    <string name="headwind_forecast_description">Current hourly headwind forecast for loaded route</string>
     <string name="precipitation_forecast">Precipitation Forecast</string>
     <string name="precipitation_forecast_description">Current hourly precipitation forecast</string>
     <string name="temperature">Temperature</string>
@@ -39,6 +43,10 @@
     <string name="relativeGrade_description">Perceived grade in percent</string>
     <string name="relativeElevationGain">Relative Elevation Gain</string>
     <string name="relativeElevationGain_description">Perceived elevation gain in meters</string>
-    <string name="windDirectionAndSpeed">Wind direction and speed</string>
+    <string name="windDirectionAndSpeed">Wind direction, speed</string>
     <string name="windDirectionAndSpeed_description">Current wind direction and wind speed</string>
+    <string name="windDirectionAndSpeedCircle">Wind direction, speed (Circle)</string>
+    <string name="windDirectionAndSpeedCircle_description">Current wind direction and wind speed (Circle graphics)</string>
+    <string name="forces">Resistance forces</string>
+    <string name="forces_description">Current resistance forces (air, rolling, gradient)</string>
 </resources>

app/src/main/res/xml/extension_info.xml

@@ -22,10 +22,17 @@
     <DataType
         description="@string/windDirectionAndSpeed_description"
         displayName="@string/windDirectionAndSpeed"
-        graphical="false"
+        graphical="true"
         icon="@drawable/wind"
         typeId="windDirectionAndSpeed" />
 
+    <DataType
+        description="@string/windDirectionAndSpeedCircle_description"
+        displayName="@string/windDirectionAndSpeedCircle"
+        graphical="true"
+        icon="@drawable/wind"
+        typeId="windDirectionAndSpeedCircle" />
+
     <DataType
         description="@string/weather_forecast_description"
         displayName="@string/weather_forecast"
@@ -54,6 +61,13 @@
         icon="@drawable/wind"
         typeId="windForecast" />
 
+    <DataType
+        description="@string/headwind_forecast_description"
+        displayName="@string/headwind_forecast"
+        graphical="true"
+        icon="@drawable/wind"
+        typeId="headwindForecast" />
+
     <DataType
         description="@string/headwind_speed_description"
         displayName="@string/headwind_speed"
@@ -124,6 +138,13 @@
         icon="@drawable/thermometer"
         typeId="temperature" />
 
+    <DataType
+            description="@string/uvi_description"
+            displayName="@string/uvi"
+            graphical="false"
+            icon="@drawable/thermometer"
+            typeId="uvi" />
+
     <DataType
         description="@string/relativeGrade_description"
         displayName="@string/relativeGrade"
@@ -137,4 +158,11 @@
         graphical="false"
         icon="@drawable/wind"
         typeId="relativeElevationGain" />
+
+    <DataType
+        description="@string/forces_description"
+        displayName="@string/forces"
+        graphical="true"
+        icon="@drawable/wind"
+        typeId="forces" />
 </ExtensionInfo>

app/src/test/kotlin/de/timklge/karooheadwind/datatypes/RelativeGradeTest.kt

@@ -1,3 +1,5 @@
+package de.timklge.karooheadwind.datatypes
+
 import de.timklge.karooheadwind.datatypes.RelativeGradeDataType
 import org.junit.Test
 import kotlin.test.assertEquals