Make Y-axis dynamic: show carrier or binaural range based on selected audio curve

DEVELOPMENT.md

@@ -108,3 +108,29 @@ Important: **Billing only works reliably when the app is installed from Google P
 6. **Verify in the app**
    - Trigger the subscribe/buy flow and confirm the purchase dialog appears.
    - Confirm acknowledgements/entitlements are applied as expected.
+
+
+## Billing logging (ADB)
+
+Billing logs are written to Android's system log (Logcat), not displayed in the app UI.
+
+To view billing logs:
+
+```bash
+# View only MindMachine billing logs
+adb logcat -s MindMachineBilling:D
+
+# Filter with silence for other tags
+adb logcat -s MindMachineBilling:D *:S
+```
+
+Example log lines you'll see:
+- `Billing setup finished: 0 OK`
+- `Product details loaded: 2 items`
+- `Query purchases returned X items`
+- `Active entitlement: true/false`
+- `Entitlement changed: false -> true`
+
+Billing log tags:
+- `MindMachineBilling` for debug/info messages
+- Errors use `Log.e()` and appear as `E/MindMachineBilling` in logcat

app/build.gradle.kts

@@ -1,6 +1,8 @@
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.serialization")
+    id("org.jetbrains.kotlin.plugin.compose")
 }
 
 import java.util.Properties
@@ -13,8 +15,8 @@ android {
         applicationId = "solutions.tretter.mindmachine"
         minSdk = 26
         targetSdk = 35
-        versionCode = 6
+        versionCode = 14
-        versionName = "1.0.1"
+        versionName = "1.0.9"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -53,7 +55,7 @@ android {
         compose = true
     }
     composeOptions {
-        kotlinCompilerExtensionVersion = "1.5.14"
+        kotlinCompilerExtensionVersion = "2.1.0"
     }
     packaging {
         resources {
@@ -83,7 +85,7 @@ dependencies {
 
     // Monetization
     implementation("com.google.android.gms:play-services-ads:23.1.0")
-    implementation("com.android.billingclient:billing-ktx:7.1.1")
+    implementation("com.android.billingclient:billing-ktx:8.0.0")
 
     testImplementation("junit:junit:4.13.2")
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.1")

app/src/main/java/com/mindmachine/mvp/MainActivity.kt

@@ -158,9 +158,8 @@ class MainActivity : ComponentActivity() {
             onNoAdsEntitlementChanged = { hasNoAds ->
                 lifecycleScope.launch { settingsRepo.updateNoAds(hasNoAds) }
             },
-        )
+        ).also { it.start() }
     }
-
     private val vm: MainViewModel by viewModels {
         MainViewModel.Factory(
             settingsRepo,
@@ -1037,6 +1036,7 @@ private class SplitFlashRenderView(context: Context) : View(context) {
 
     private fun paletteColor(color: solutions.tretter.mindmachine.session.FlashPaletteColor): Int = when (color) {
         solutions.tretter.mindmachine.session.FlashPaletteColor.BLACK -> android.graphics.Color.BLACK
+        solutions.tretter.mindmachine.session.FlashPaletteColor.WHITE -> android.graphics.Color.WHITE
         solutions.tretter.mindmachine.session.FlashPaletteColor.RED -> android.graphics.Color.RED
         solutions.tretter.mindmachine.session.FlashPaletteColor.GREEN -> android.graphics.Color.GREEN
         solutions.tretter.mindmachine.session.FlashPaletteColor.YELLOW -> android.graphics.Color.YELLOW
@@ -1255,7 +1255,6 @@ fun RemoveAdsScreen(billingManager: solutions.tretter.mindmachine.billing.Billin
     val ui by vm.ui.collectAsStateWithLifecycle()
     val activity = LocalContext.current as? Activity
     val details by billingManager.productDetails.collectAsStateWithLifecycle()
-    val logs by billingManager.logs.collectAsStateWithLifecycle()
 
     val subDetails = details[solutions.tretter.mindmachine.billing.BillingProducts.SUB_REMOVE_ADS_MONTHLY]
     val subPrice = subDetails
@@ -1307,21 +1306,6 @@ fun RemoveAdsScreen(billingManager: solutions.tretter.mindmachine.billing.Billin
             "Note: Purchases only work when the app is installed from Google Play (Internal testing/Production). Debug sideloaded builds won’t complete real billing flows.",
             color = MaterialTheme.colorScheme.onBackground.copy(alpha = 0.8f)
         )
-
-        // Debug logs
-        Text("Billing logs:", style = MaterialTheme.typography.titleMedium, color = MaterialTheme.colorScheme.onBackground)
-        Column(
-            Modifier
-                .weight(1f)
-                .fillMaxWidth()
-                .verticalScroll(rememberScrollState())
-                .background(MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.2f))
-                .padding(8.dp)
-        ) {
-            logs.forEach { log ->
-                Text(log, color = MaterialTheme.colorScheme.onBackground, style = MaterialTheme.typography.bodySmall)
-            }
-        }
     }
 }
 

app/src/main/java/com/mindmachine/mvp/billing/BillingManager.kt

@@ -2,13 +2,15 @@ package solutions.tretter.mindmachine.billing
 
 import android.app.Activity
 import android.content.Context
+import android.util.Log
 import com.android.billingclient.api.AcknowledgePurchaseParams
 import com.android.billingclient.api.BillingClient
 import com.android.billingclient.api.BillingClientStateListener
 import com.android.billingclient.api.BillingFlowParams
 import com.android.billingclient.api.BillingResult
 import com.android.billingclient.api.ProductDetails
-import com.android.billingclient.api.ProductDetailsResponseListener
+import com.android.billingclient.api.QueryProductDetailsResult
+import com.android.billingclient.api.PendingPurchasesParams
 import com.android.billingclient.api.Purchase
 import com.android.billingclient.api.PurchasesResponseListener
 import com.android.billingclient.api.QueryProductDetailsParams
@@ -16,9 +18,6 @@ import com.android.billingclient.api.QueryPurchasesParams
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
 
 class BillingManager(
     context: Context,
@@ -32,15 +31,12 @@ class BillingManager(
     private val _productDetails = MutableStateFlow<Map<String, ProductDetails>>(emptyMap())
     val productDetails: StateFlow<Map<String, ProductDetails>> = _productDetails.asStateFlow()
 
-    private val _logs = MutableStateFlow<List<String>>(emptyList())
-    val logs: StateFlow<List<String>> = _logs.asStateFlow()
-
     private fun log(message: String) {
-        val timestamp = SimpleDateFormat("HH:mm:ss.SSS", Locale.getDefault()).format(Date())
+        Log.d("MindMachineBilling", message)
-        _logs.value = _logs.value + "[$timestamp] $message"
+    }
-        if (_logs.value.size > 50) {
+
-            _logs.value = _logs.value.takeLast(50)
+    private fun logError(message: String) {
-        }
+        Log.e("MindMachineBilling", message)
     }
 
     private val billingClient: BillingClient = BillingClient.newBuilder(appContext)
@@ -49,27 +45,48 @@ class BillingManager(
                 handlePurchases(purchases)
             }
         }
-        .enablePendingPurchases()
+        .enablePendingPurchases(
+	    PendingPurchasesParams.newBuilder()
+                .enableOneTimeProducts()
+                .build()
+	)
         .build()
 
+    @Volatile
+    private var isConnecting = false
+    
     fun start() {
-        log("BillingManager.start()")
+        log("BillingManager.start() - isReady=${billingClient.isReady}, isConnecting=$isConnecting")
+    
         if (billingClient.isReady) {
             log("Billing client already ready")
             refresh()
             return
         }
+    
+        if (isConnecting) {
+            log("Billing client connection already in progress")
+            return
+        }
+    
+        isConnecting = true
+        log("Calling startConnection()")
+    
         billingClient.startConnection(object : BillingClientStateListener {
             override fun onBillingSetupFinished(result: BillingResult) {
+                isConnecting = false
                 log("Billing setup finished: ${result.responseCode} ${result.debugMessage}")
+    
                 if (result.responseCode == BillingClient.BillingResponseCode.OK) {
-                    refresh()
+		    refresh()
+                } else {
+                    logError("Billing setup failed: ${result.responseCode} ${result.debugMessage}")
                 }
             }
     
             override fun onBillingServiceDisconnected() {
+                isConnecting = false
                 log("Billing service disconnected")
-                // No-op, will retry on next call.
             }
         })
     }
@@ -120,7 +137,11 @@ class BillingManager(
             .build()
 
         val result = billingClient.launchBillingFlow(activity, params)
-        log("launchBillingFlow result: ${result.responseCode} ${result.debugMessage}")
+        if (result.responseCode == BillingClient.BillingResponseCode.OK) {
+            log("launchBillingFlow succeeded")
+        } else {
+            logError("launchBillingFlow failed: ${result.responseCode} ${result.debugMessage}")
+        }
     }
 
     private fun queryProductDetails() {
@@ -130,28 +151,60 @@ class BillingManager(
             return
         }
     
-        val products = listOf(
+        val featureResult = billingClient.isFeatureSupported(BillingClient.FeatureType.PRODUCT_DETAILS)
-            QueryProductDetailsParams.Product.newBuilder()
+        log("PRODUCT_DETAILS support: ${featureResult.responseCode} ${featureResult.debugMessage}")
-                .setProductId(BillingProducts.SUB_REMOVE_ADS_MONTHLY)
+        if (featureResult.responseCode != BillingClient.BillingResponseCode.OK) {
-                .setProductType(BillingClient.ProductType.SUBS)
+            logError("PRODUCT_DETAILS feature not supported")
-                .build(),
+            return
-            QueryProductDetailsParams.Product.newBuilder()
+        }
-                .setProductId(BillingProducts.INAPP_REMOVE_ADS_FOREVER)
+    
-                .setProductType(BillingClient.ProductType.INAPP)
+        queryProductDetailsForType(
-                .build(),
+            productType = BillingClient.ProductType.SUBS,
+            productIds = listOf(BillingProducts.SUB_REMOVE_ADS_MONTHLY)
         )
     
-        val params = QueryProductDetailsParams.newBuilder()
+        queryProductDetailsForType(
-            .setProductList(products)
+            productType = BillingClient.ProductType.INAPP,
-            .build()
+            productIds = listOf(BillingProducts.INAPP_REMOVE_ADS_FOREVER)
+        )
+    }
     
-        billingClient.queryProductDetailsAsync(params, ProductDetailsResponseListener { result, detailsList ->
+    private fun queryProductDetailsForType(
-            log("queryProductDetails result: ${result.responseCode} ${result.debugMessage}")
+        productType: String,
-            if (result.responseCode == BillingClient.BillingResponseCode.OK) {
+        productIds: List<String>
-                _productDetails.value = detailsList.associateBy { it.productId }
+    ) {
-                log("Product details loaded: ${detailsList.size} items")
+        try {
+            log("Querying $productType product details for $productIds")
+    
+            val products = productIds.map { productId ->
+                QueryProductDetailsParams.Product.newBuilder()
+                    .setProductId(productId)
+                    .setProductType(productType)
+                    .build()
             }
-        })
+    
+            val params = QueryProductDetailsParams.newBuilder()
+                .setProductList(products)
+                .build()
+    
+            billingClient.queryProductDetailsAsync(params) { result, queryResult ->
+                log("queryProductDetailsAsync($productType) result: ${result.responseCode} ${result.debugMessage}")
+    
+                val detailsList = queryResult.productDetailsList
+                log("Fetched $productType products: ${detailsList.map { it.productId }}")
+    
+                if (queryResult.unfetchedProductList.isNotEmpty()) {
+                    logError("Unfetched $productType products: ${queryResult.unfetchedProductList}")
+                }
+    
+                if (result.responseCode == BillingClient.BillingResponseCode.OK) {
+                    _productDetails.value = _productDetails.value + detailsList.associateBy { it.productId }
+                    log("Product details cache now has: ${_productDetails.value.keys}")
+                }
+            }
+        } catch (t: Throwable) {
+            Log.e("MindMachineBilling", "Exception querying $productType product details", t)
+        }
     }
 
     private fun queryActivePurchases() {
@@ -162,9 +215,11 @@ class BillingManager(
         }
 
         val listener = PurchasesResponseListener { result, purchases ->
-            log("Query purchases result: ${result.responseCode} ${result.debugMessage}")
             if (result.responseCode == BillingClient.BillingResponseCode.OK) {
+                log("Query purchases returned ${purchases.size} items")
                 handlePurchases(purchases)
+            } else {
+                logError("Query purchases failed: ${result.responseCode} ${result.debugMessage}")
             }
         }
 
@@ -179,7 +234,7 @@ class BillingManager(
     }
 
     private fun handlePurchases(purchases: List<Purchase>) {
-        log("handlePurchases() count=${purchases.size}")
+        log("handlePurchases count=${purchases.size}")
         val active = purchases.any { p ->
             p.purchaseState == Purchase.PurchaseState.PURCHASED &&
                 p.products.any { it == BillingProducts.SUB_REMOVE_ADS_MONTHLY || it == BillingProducts.INAPP_REMOVE_ADS_FOREVER }
@@ -199,7 +254,13 @@ class BillingManager(
                 val params = AcknowledgePurchaseParams.newBuilder()
                     .setPurchaseToken(purchase.purchaseToken)
                     .build()
-                billingClient.acknowledgePurchase(params) { /* no-op */ }
+                billingClient.acknowledgePurchase(params) { billingResult ->
+                    if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {
+                        log("Purchase acknowledged successfully")
+                    } else {
+                        logError("Failed to acknowledge purchase: ${billingResult.responseCode} ${billingResult.debugMessage}")
+                    }
+                }
             }
     }
 }

app/src/main/java/com/mindmachine/mvp/session/FlashSequence.kt

@@ -2,6 +2,7 @@ package solutions.tretter.mindmachine.session
 
 enum class FlashPaletteColor {
     BLACK,
+    WHITE,
     RED,
     GREEN,
     YELLOW,

app/src/main/java/com/mindmachine/mvp/session/FlashSequenceEditor.kt

@@ -164,6 +164,7 @@ private fun FlashPaletteColor.next(): FlashPaletteColor {
 
 private fun FlashPaletteColor.previewColor(): Color = when (this) {
     FlashPaletteColor.BLACK -> Color.Black
+    FlashPaletteColor.WHITE -> Color.White
     FlashPaletteColor.RED -> Color(0xFFD32F2F)
     FlashPaletteColor.GREEN -> Color(0xFF2E7D32)
     FlashPaletteColor.YELLOW -> Color(0xFFF9A825)

app/src/main/java/com/mindmachine/mvp/session/ParameterRanges.kt

@@ -13,5 +13,5 @@ object ParameterRanges {
     const val CARRIER_HZ_MAX = 1200f
 
     const val BINAURAL_HZ_MIN = 0.5f
-    const val BINAURAL_HZ_MAX = 30f
+    const val BINAURAL_HZ_MAX = 20f
 }

app/src/main/java/com/mindmachine/mvp/session/TimelineEditorScreen.kt

@@ -266,18 +266,28 @@ internal fun TimelineGraph(
             (context as? android.app.Activity)?.window?.decorView?.performHapticFeedback(HapticFeedbackConstants.KEYBOARD_TAP)
         }
 
-        val yLabels = if (isVisual) {
+        // Y-axis labels - dynamic based on which curve is selected. For audio: carrier (left) or binaural (right). For visual: flash interval.
+        val yAxisLabels = if (isVisual) {
             listOf(
                 formatMsLabel(ParameterMapping.logMap01(1f, ParameterRanges.FLASH_INTERVAL_MS_MIN, ParameterRanges.FLASH_INTERVAL_MS_MAX)),
                 formatMsLabel(ParameterMapping.logMap01(0.5f, ParameterRanges.FLASH_INTERVAL_MS_MIN, ParameterRanges.FLASH_INTERVAL_MS_MAX)),
                 formatMsLabel(ParameterMapping.logMap01(0f, ParameterRanges.FLASH_INTERVAL_MS_MIN, ParameterRanges.FLASH_INTERVAL_MS_MAX)),
             )
         } else {
-            listOf(
+            // Audio: switch labels based on selected side
-                formatHzLabel(ParameterMapping.logMap01(1f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
+            if (selectedLeft) {
-                formatHzLabel(ParameterMapping.logMap01(0.5f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
+                listOf(
-                formatHzLabel(ParameterMapping.logMap01(0f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
+                    formatHzLabel(ParameterMapping.logMap01(1f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
-            )
+                    formatHzLabel(ParameterMapping.logMap01(0.5f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
+                    formatHzLabel(ParameterMapping.logMap01(0f, ParameterRanges.CARRIER_HZ_MIN, ParameterRanges.CARRIER_HZ_MAX)),
+                )
+            } else {
+                listOf(
+                    formatHzLabel(ParameterMapping.logMap01(1f, ParameterRanges.BINAURAL_HZ_MIN, ParameterRanges.BINAURAL_HZ_MAX)),
+                    formatHzLabel(ParameterMapping.logMap01(0.5f, ParameterRanges.BINAURAL_HZ_MIN, ParameterRanges.BINAURAL_HZ_MAX)),
+                    formatHzLabel(ParameterMapping.logMap01(0f, ParameterRanges.BINAURAL_HZ_MIN, ParameterRanges.BINAURAL_HZ_MAX)),
+                )
+            }
         }
         val xStart = formatTimeLabel(viewport.startSec)
         val xMid = formatTimeLabel(viewport.startSec + viewport.secondsPerScreen / 2f)
@@ -288,12 +298,13 @@ internal fun TimelineGraph(
             horizontalArrangement = Arrangement.spacedBy(8.dp),
             verticalAlignment = Alignment.CenterVertically,
         ) {
+            // Left Y-axis labels
             Column(
                 modifier = Modifier.height(190.dp).width(48.dp),
                 verticalArrangement = Arrangement.SpaceBetween,
                 horizontalAlignment = Alignment.End,
             ) {
-                yLabels.forEach { label ->
+                yAxisLabels.forEach { label ->
                     Text(
                         text = label,
                         color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.75f),

app/src/main/java/com/mindmachine/mvp/session/TimelineParameters.kt

@@ -35,7 +35,7 @@ object TimelineParameters {
         ParameterId.BRIGHTNESS to Range(min = 0.0001f, max = 1.0f, logScale = true, units = "%"),
         ParameterId.BLINK_RATE to Range(min = 0.1f, max = 30f, logScale = true, units = "Hz"),
         ParameterId.CARRIER_FREQUENCY to Range(min = 200f, max = 1200f, logScale = true, units = "Hz"),
-        ParameterId.BINAURAL_BEAT to Range(min = 0.5f, max = 30f, logScale = true, units = "Hz"),
+        ParameterId.BINAURAL_BEAT to Range(min = 0.5f, max = 20f, logScale = true, units = "Hz"),
     )
 
     fun parameterForCurve(curve: TimelineEditorState.ActiveCurve): ParameterId {

build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     id("com.android.application") version "8.5.2" apply false
-    id("org.jetbrains.kotlin.android") version "1.9.24" apply false
+    id("org.jetbrains.kotlin.android") version "2.1.0" apply false
-    id("org.jetbrains.kotlin.plugin.serialization") version "1.9.24" apply false
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0" apply false
+    id("org.jetbrains.kotlin.plugin.compose") version "2.1.0" apply false
 }