Scroll timer improvements

app/src/main/kotlin/org/koitharu/kotatsu/main/ui/MainActivity.kt

@@ -110,7 +110,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>(), AppBarOwner, BottomNav
 		setSupportActionBar(viewBinding.searchBar)
 
 		viewBinding.fab?.setOnClickListener(this)
-		viewBinding.navRail?.headerView?.setOnClickListener(this)
+		viewBinding.navRail?.headerView?.findViewById<View>(R.id.railFab)?.setOnClickListener(this)
 		fadingAppbarMediator =
 			FadingAppbarMediator(viewBinding.appbar, viewBinding.layoutSearch ?: viewBinding.searchBar)
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderActivity.kt

@@ -72,7 +72,7 @@ class ReaderActivity :
 	ReaderControlDelegate.OnInteractionListener,
 	ReaderNavigationCallback,
 	IdlingDetector.Callback,
-	ZoomControl.ZoomControlListener {
+	ZoomControl.ZoomControlListener, View.OnClickListener, ScrollTimerControlView.OnVisibilityChangeListener {
 
 	@Inject
 	lateinit var settings: AppSettings
@@ -115,10 +115,15 @@ class ReaderActivity :
 		controlDelegate = ReaderControlDelegate(resources, settings, tapGridSettings, this)
 		viewBinding.zoomControl.listener = this
 		viewBinding.actionsView.listener = this
+		viewBinding.buttonTimer?.setOnClickListener(this)
 		idlingDetector.bindToLifecycle(this)
 		screenOrientationHelper.applySettings()
 		viewModel.isBookmarkAdded.observe(this) { viewBinding.actionsView.isBookmarkAdded = it }
-		scrollTimer.isActive.observe(this) { viewBinding.actionsView.setTimerActive(it) }
+		scrollTimer.isActive.observe(this) {
+			updateScrollTimerButton()
+			viewBinding.actionsView.setTimerActive(it)
+		}
+		viewBinding.timerControl.onVisibilityChangeListener = this
 		viewBinding.timerControl.attach(scrollTimer, this)
 		if (resources.getBoolean(R.bool.is_tablet)) {
 			viewBinding.timerControl.updateLayoutParams<CoordinatorLayout.LayoutParams> {
@@ -198,6 +203,10 @@ class ReaderActivity :
 		viewModel.saveCurrentState(readerManager.currentReader?.getCurrentState())
 	}
 
+	override fun onVisibilityChanged(v: View, visibility: Int) {
+		updateScrollTimerButton()
+	}
+
 	override fun onZoomIn() {
 		readerManager.currentReader?.onZoomIn()
 	}
@@ -206,6 +215,12 @@ class ReaderActivity :
 		readerManager.currentReader?.onZoomOut()
 	}
 
+	override fun onClick(v: View) {
+		when (v.id) {
+			R.id.button_timer -> onScrollTimerClick(isLongClick = false)
+		}
+	}
+
 	private fun onInitReader(mode: ReaderMode?) {
 		if (mode == null) {
 			return
@@ -328,6 +343,7 @@ class ReaderActivity :
 			viewBinding.toolbarDocked?.isVisible = isUiVisible
 			viewBinding.infoBar.isGone = isUiVisible || (!viewModel.isInfoBarEnabled.value)
 			viewBinding.infoBar.isTimeVisible = isFullscreen
+			updateScrollTimerButton()
 			systemUiController.setSystemUiVisible(isUiVisible || !isFullscreen)
 		}
 	}
@@ -455,6 +471,18 @@ class ReaderActivity :
 		viewBinding.actionsView.isPrevEnabled = uiState.hasPreviousChapter()
 	}
 
+	private fun updateScrollTimerButton() {
+		val button = viewBinding.buttonTimer ?: return
+		val isButtonVisible = scrollTimer.isActive.value
+			&& !viewBinding.appbarTop.isVisible
+			&& !viewBinding.timerControl.isVisible
+		if (button.isVisible != isButtonVisible) {
+			val transition = Fade().addTarget(button)
+			TransitionManager.beginDelayedTransition(viewBinding.root, transition)
+			button.isVisible = isButtonVisible
+		}
+	}
+
 	private fun askForIncognitoMode() {
 		buildAlertDialog(this, isCentered = true) {
 			var dontAskAgain = false

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ScrollTimer.kt

@@ -25,7 +25,7 @@ import org.koitharu.kotatsu.core.prefs.observeAsFlow
 import org.koitharu.kotatsu.core.util.ext.resolveDp
 import kotlin.math.roundToLong
 
-private const val MAX_DELAY = 8L
+private const val MAX_DELAY = 32L
 private const val MAX_SWITCH_DELAY = 10_000L
 private const val INTERACTION_SKIP_MS = 2_000L
 private const val SPEED_FACTOR_DELTA = 0.02f
@@ -45,7 +45,7 @@ class ScrollTimer @AssistedInject constructor(
 	private var resumeAt = 0L
 	private var isTouchDown = MutableStateFlow(false)
 	private val isRunning = MutableStateFlow(false)
-	private val scrollDelta = resources.resolveDp(2)
+	private val scrollDelta = resources.resolveDp(1)
 
 	val isActive: StateFlow<Boolean>
 		get() = isRunning
@@ -88,7 +88,7 @@ class ScrollTimer @AssistedInject constructor(
 			delayMs = 0L
 			pageSwitchDelay = 0L
 		} else {
-			val speedFactor = 1 - speed
+			val speedFactor = 1f - speed
 			delayMs = (MAX_DELAY * speedFactor).roundToLong()
 			pageSwitchDelay = (MAX_SWITCH_DELAY * speedFactor).roundToLong()
 		}

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ScrollTimerControlView.kt

@@ -26,6 +26,7 @@ import org.koitharu.kotatsu.core.util.ext.parentView
 import org.koitharu.kotatsu.databinding.ViewScrollTimerBinding
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
+import kotlin.math.abs
 
 @AndroidEntryPoint
 class ScrollTimerControlView @JvmOverloads constructor(
@@ -37,6 +38,8 @@ class ScrollTimerControlView @JvmOverloads constructor(
 	@Inject
 	lateinit var settings: AppSettings
 
+	var onVisibilityChangeListener: OnVisibilityChangeListener? = null
+
 	private val binding = ViewScrollTimerBinding.inflate(LayoutInflater.from(context), this)
 
 	private var scrollTimer: ScrollTimer? = null
@@ -63,10 +66,12 @@ class ScrollTimerControlView @JvmOverloads constructor(
 			key = AppSettings.KEY_READER_AUTOSCROLL_SPEED,
 			valueProducer = { readerAutoscrollSpeed },
 		).observe(lifecycleOwner) {
-			binding.sliderTimer.value = it.coerceIn(
-				binding.sliderTimer.valueFrom,
-				binding.sliderTimer.valueTo,
-			)
+			if (abs(it - binding.sliderTimer.value) > 0.0001) {
+				binding.sliderTimer.value = it.coerceIn(
+					binding.sliderTimer.valueFrom,
+					binding.sliderTimer.valueTo,
+				)
+			}
 		}
 		updateDescription()
 	}
@@ -83,9 +88,10 @@ class ScrollTimerControlView @JvmOverloads constructor(
 	}
 
 	override fun getFormattedValue(value: Float): String {
-		// val minValue = binding.sliderTimer.valueFrom
-		// val maxValue = binding.sliderTimer.valueTo
-		return labelPattern.format(value * 10f)
+		val valueFrom = binding.sliderTimer.valueFrom
+		val valueTo = binding.sliderTimer.valueTo
+		val percent = (value - valueFrom) / (valueTo - valueFrom)
+		return labelPattern.format(0.1 + percent * 10) // just something to display
 	}
 
 	override fun onValueChange(
@@ -103,6 +109,11 @@ class ScrollTimerControlView @JvmOverloads constructor(
 		scrollTimer?.setActive(isChecked)
 	}
 
+	override fun setVisibility(visibility: Int) {
+		super.setVisibility(visibility)
+		onVisibilityChangeListener?.onVisibilityChanged(this, visibility)
+	}
+
 	fun show() {
 		setupVisibilityTransition()
 		isVisible = true
@@ -139,4 +150,9 @@ class ScrollTimerControlView @JvmOverloads constructor(
 			binding.textViewDescription.isVisible = true
 		}
 	}
+
+	fun interface OnVisibilityChangeListener {
+
+		fun onVisibilityChanged(v: View, visibility: Int)
+	}
 }

app/src/main/res/layout/activity_reader.xml

@@ -12,6 +12,19 @@
 		android:layout_height="match_parent"
 		tools:background="@color/grey" />
 
+	<com.google.android.material.button.MaterialButton
+		android:id="@+id/button_timer"
+		style="?materialIconButtonOutlinedStyle"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_gravity="bottom|end"
+		android:layout_margin="16dp"
+		android:contentDescription="@string/page_switch_timer"
+		android:tooltipText="@string/page_switch_timer"
+		app:backgroundTint="@color/bg_floating_button"
+		app:icon="@drawable/ic_timelapse"
+		app:layout_insetEdge="bottom" />
+
 	<org.koitharu.kotatsu.core.ui.widgets.ZoomControl
 		android:id="@+id/zoomControl"
 		android:layout_width="wrap_content"

app/src/main/res/layout/view_scroll_timer.xml

@@ -66,8 +66,8 @@
 		android:layout_marginEnd="@dimen/margin_normal"
 		android:contentDescription="@string/speed"
 		android:labelFor="@id/switch_scroll_timer"
-		android:valueFrom="0.001"
-		android:valueTo="0.9"
+		android:valueFrom="0.000001"
+		android:valueTo="0.95"
 		app:labelBehavior="floating"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toEndOf="@id/label_timer"