[Timetable] Add SwipeToRefresh. Select start&end hours based on lesson ranges.

app/build.gradle

@@ -169,7 +169,7 @@ dependencies {
 
     implementation 'com.github.kuba2k2:RecyclerTabLayout:700f980584'
 
-    implementation 'com.github.kuba2k2:Tachyon:bbd421f994'
+    implementation 'com.github.kuba2k2:Tachyon:551943a6b5'
 }
 repositories {
     mavenCentral()

app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt

@@ -4,7 +4,9 @@ import android.Manifest
 import android.app.Activity
 import android.content.Context
 import android.content.pm.PackageManager
+import android.content.res.Resources
 import android.graphics.Typeface
+import android.graphics.drawable.Drawable
 import android.os.Build
 import android.os.Bundle
 import android.text.*
@@ -13,9 +15,10 @@ import android.text.style.StrikethroughSpan
 import android.text.style.StyleSpan
 import android.util.LongSparseArray
 import android.util.SparseArray
+import android.util.TypedValue
 import android.view.View
 import android.widget.TextView
-import androidx.annotation.StringRes
+import androidx.annotation.*
 import androidx.core.app.ActivityCompat
 import androidx.core.util.forEach
 import androidx.lifecycle.LifecycleOwner
@@ -446,3 +449,49 @@ fun <T> LiveData<T>.observeOnce(lifecycleOwner: LifecycleOwner, observer: Observ
         }
     })
 }
+
+/**
+ * Convert a value in dp to pixels.
+ */
+val Int.dp: Int
+    get() = (this * Resources.getSystem().displayMetrics.density).toInt()
+/**
+ * Convert a value in pixels to dp.
+ */
+val Int.px: Int
+    get() = (this / Resources.getSystem().displayMetrics.density).toInt()
+
+@ColorInt
+fun @receiver:AttrRes Int.resolveAttr(context: Context?): Int {
+    val typedValue = TypedValue()
+    context?.theme?.resolveAttribute(this, typedValue, true)
+    return typedValue.data
+}
+@ColorInt
+fun @receiver:ColorRes Int.resolveColor(context: Context): Int {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+        context.resources.getColor(this, context.theme)
+    }
+    else {
+        context.resources.getColor(this)
+    }
+}
+fun @receiver:DrawableRes Int.resolveDrawable(context: Context): Drawable {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+        context.resources.getDrawable(this, context.theme)
+    }
+    else {
+        context.resources.getDrawable(this)
+    }
+}
+
+fun View.findParentById(targetId: Int): View? {
+    if (id == targetId) {
+        return this
+    }
+    val viewParent = this.parent ?: return null
+    if (viewParent is View) {
+        return viewParent.findParentById(targetId)
+    }
+    return null
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/v2/TimetableFragment.kt

@@ -5,12 +5,14 @@ import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.viewpager.widget.ViewPager
 import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import kotlinx.coroutines.*
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.MainActivity
 import pl.szczodrzynski.edziennik.R
@@ -18,16 +20,25 @@ import pl.szczodrzynski.edziennik.api.v2.LOGIN_TYPE_LIBRUS
 import pl.szczodrzynski.edziennik.databinding.FragmentTimetableV2Binding
 import pl.szczodrzynski.edziennik.utils.Themes
 import pl.szczodrzynski.edziennik.utils.models.Date
+import kotlin.coroutines.CoroutineContext
 
-class TimetableFragment : Fragment() {
+class TimetableFragment : Fragment(), CoroutineScope {
     companion object {
         private const val TAG = "TimetableFragment"
         const val ACTION_SCROLL_TO_DATE = "pl.szczodrzynski.edziennik.timetable.SCROLL_TO_DATE"
+        const val DEFAULT_START_HOUR = 6
+        const val DEFAULT_END_HOUR = 19
+        var pageSelection: Date? = null
     }
 
     private lateinit var app: App
     private lateinit var activity: MainActivity
     private lateinit var b: FragmentTimetableV2Binding
+
+    private lateinit var job: Job
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
     private var fabShown = false
     private val items = mutableListOf<Date>()
 
@@ -36,11 +47,13 @@ class TimetableFragment : Fragment() {
         if (context == null)
             return null
         app = activity.application as App
+        job = Job()
         context!!.theme.applyStyle(Themes.appTheme, true)
         if (app.profile == null)
             return inflater.inflate(R.layout.fragment_loading, container, false)
         // activity, context and profile is valid
         b = FragmentTimetableV2Binding.inflate(inflater)
+        b.refreshLayout.setParent(activity.swipeRefreshLayout)
         return b.root
     }
 
@@ -62,48 +75,65 @@ class TimetableFragment : Fragment() {
         activity.unregisterReceiver(broadcastReceiver)
     }
 
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) { launch {
         // TODO check if app, activity, b can be null
         if (app.profile == null || !isAdded)
-            return
+            return@launch
 
         if (app.profile.loginStoreType == LOGIN_TYPE_LIBRUS && app.profile.getLoginData("timetableNotPublic", false)) {
             b.timetableLayout.visibility = View.GONE
             b.timetableNotPublicLayout.visibility = View.VISIBLE
-            return
+            return@launch
         }
         b.timetableLayout.visibility = View.VISIBLE
         b.timetableNotPublicLayout.visibility = View.GONE
 
-        items.clear()
-
-        val monthDayCount = listOf(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
-
         val today = Date.getToday().value
-        val yearStart = app.profile.dateSemester1Start?.clone() ?: return
+        var startHour = DEFAULT_START_HOUR
-        val yearEnd = app.profile.dateYearEnd ?: return
+        var endHour = DEFAULT_END_HOUR
-        while (yearStart.value <= yearEnd.value) {
+        val deferred = async(Dispatchers.Default) {
-            items += yearStart.clone()
+            items.clear()
-            var maxDays = monthDayCount[yearStart.month-1]
-            if (yearStart.month == 2 && yearStart.isLeap)
-                maxDays++
-            yearStart.day++
-            if (yearStart.day > maxDays) {
-                yearStart.day = 1
-                yearStart.month++
-            }
-            if (yearStart.month > 12) {
-                yearStart.month = 1
-                yearStart.year++
-            }
-        }
 
-        val pagerAdapter = TimetablePagerAdapter(fragmentManager ?: return, items)
+            val monthDayCount = listOf(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
+
+            val yearStart = app.profile.dateSemester1Start?.clone() ?: return@async
+            val yearEnd = app.profile.dateYearEnd ?: return@async
+            while (yearStart.value <= yearEnd.value) {
+                items += yearStart.clone()
+                var maxDays = monthDayCount[yearStart.month-1]
+                if (yearStart.month == 2 && yearStart.isLeap)
+                    maxDays++
+                yearStart.day++
+                if (yearStart.day > maxDays) {
+                    yearStart.day = 1
+                    yearStart.month++
+                }
+                if (yearStart.month > 12) {
+                    yearStart.month = 1
+                    yearStart.year++
+                }
+            }
+
+            val lessonRanges = app.db.lessonRangeDao().getAllNow(App.profileId)
+            startHour = lessonRanges.map { it.startTime.hour }.min() ?: DEFAULT_START_HOUR
+            endHour = lessonRanges.map { it.endTime.hour }.max()?.plus(1) ?: DEFAULT_END_HOUR
+        }
+        deferred.await()
+
+        val pagerAdapter = TimetablePagerAdapter(
+                fragmentManager ?: return@launch,
+                items,
+                startHour,
+                endHour
+        )
         b.viewPager.offscreenPageLimit = 2
         b.viewPager.adapter = pagerAdapter
         b.viewPager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
             override fun onPageScrollStateChanged(state: Int) {
-
+                if (b.refreshLayout != null) {
+                    Log.d(TAG, "State $state")
+                    b.refreshLayout.isEnabled = state == ViewPager.SCROLL_STATE_IDLE
+                }
             }
 
             override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
@@ -111,6 +141,7 @@ class TimetableFragment : Fragment() {
             }
 
             override fun onPageSelected(position: Int) {
+                pageSelection = items[position]
                 activity.navView.bottomBar.fabEnable = items[position].value != today
                 if (activity.navView.bottomBar.fabEnable && !fabShown) {
                     activity.gainAttentionFAB()
@@ -123,10 +154,10 @@ class TimetableFragment : Fragment() {
         b.tabLayout.setCurrentItem(items.indexOfFirst { it.value == today }, false)
 
         //activity.navView.bottomBar.fabEnable = true
-        activity.navView.bottomBar.fabExtendedText = getString(pl.szczodrzynski.edziennik.R.string.timetable_today)
+        activity.navView.bottomBar.fabExtendedText = getString(R.string.timetable_today)
         activity.navView.bottomBar.fabIcon = CommunityMaterial.Icon.cmd_calendar_today
         activity.navView.setFabOnClickListener(View.OnClickListener {
             b.tabLayout.setCurrentItem(items.indexOfFirst { it.value == today }, true)
         })
-    }
+    }}
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/v2/TimetablePagerAdapter.kt

@@ -8,7 +8,12 @@ import pl.szczodrzynski.edziennik.ui.modules.timetable.v2.day.TimetableDayFragme
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Week
 
-class TimetablePagerAdapter(val fragmentManager: FragmentManager, val items: List<Date>) : FragmentStatePagerAdapter(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
+class TimetablePagerAdapter(
+        fragmentManager: FragmentManager,
+        private val items: List<Date>,
+        private val startHour: Int,
+        private val endHour: Int
+) : FragmentStatePagerAdapter(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
     companion object {
         private const val TAG = "TimetablePagerAdapter"
     }
@@ -21,6 +26,8 @@ class TimetablePagerAdapter(val fragmentManager: FragmentManager, val items: Lis
         return TimetableDayFragment().apply {
             arguments = Bundle().apply {
                 putInt("date", items[position].value)
+                putInt("startHour", startHour)
+                putInt("endHour", endHour)
             }
         }
         /*return TimetableDayFragment().apply {

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/v2/day/TimetableDayFragment.kt

@@ -7,42 +7,97 @@ import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.FrameLayout
 import android.widget.TextView
+import androidx.asynclayoutinflater.view.AsyncLayoutInflater
+import androidx.core.view.setPadding
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import com.linkedin.android.tachyon.DayView
+import com.linkedin.android.tachyon.DayViewConfig
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.MainActivity.Companion.DRAWER_ITEM_TIMETABLE
 import pl.szczodrzynski.edziennik.api.v2.LOGIN_TYPE_LIBRUS
 import pl.szczodrzynski.edziennik.api.v2.events.task.EdziennikTask
 import pl.szczodrzynski.edziennik.data.db.modules.timetable.Lesson
 import pl.szczodrzynski.edziennik.data.db.modules.timetable.LessonFull
-import pl.szczodrzynski.edziennik.databinding.FragmentTimetableV2DayBinding
 import pl.szczodrzynski.edziennik.databinding.TimetableLessonBinding
+import pl.szczodrzynski.edziennik.databinding.TimetableNoTimetableBinding
 import pl.szczodrzynski.edziennik.ui.dialogs.timetable.LessonDetailsDialog
+import pl.szczodrzynski.edziennik.ui.modules.timetable.v2.TimetableFragment.Companion.DEFAULT_END_HOUR
+import pl.szczodrzynski.edziennik.ui.modules.timetable.v2.TimetableFragment.Companion.DEFAULT_START_HOUR
+import pl.szczodrzynski.edziennik.utils.ListenerScrollView
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.navlib.getColorFromAttr
 import java.util.*
+import kotlin.coroutines.CoroutineContext
 import kotlin.math.min
 
-class TimetableDayFragment() : Fragment() {
+class TimetableDayFragment : Fragment(), CoroutineScope {
     companion object {
         private const val TAG = "TimetableDayFragment"
     }
 
     private lateinit var app: App
     private lateinit var activity: MainActivity
-    private lateinit var b: FragmentTimetableV2DayBinding
+    private lateinit var inflater: AsyncLayoutInflater
+
+    private lateinit var job: Job
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
     private lateinit var date: Date
+    private var startHour = DEFAULT_START_HOUR
+    private var endHour = DEFAULT_END_HOUR
+    private var firstEventMinute = 24*60
+
+    // find SwipeRefreshLayout in the hierarchy
+    private val refreshLayout by lazy { view?.findParentById(R.id.refreshLayout) }
+    // the day ScrollView
+    private val dayScrollDelegate = lazy {
+        val dayScroll = ListenerScrollView(context!!)
+        dayScroll.layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
+        dayScroll.setOnRefreshLayoutEnabledListener { enabled ->
+            refreshLayout?.isEnabled = enabled
+        }
+        dayScroll
+    }
+    private val dayScroll by dayScrollDelegate
+    // the lesson DayView
+    private val dayView by lazy {
+        val dayView = DayView(context!!, DayViewConfig(
+                startHour = startHour,
+                endHour = endHour,
+                dividerHeight = 1.dp,
+                halfHourHeight = 60.dp,
+                hourDividerColor = R.attr.hourDividerColor.resolveAttr(context),
+                halfHourDividerColor = R.attr.halfHourDividerColor.resolveAttr(context),
+                hourLabelWidth = 40.dp,
+                hourLabelMarginEnd = 10.dp,
+                eventMargin = 2.dp
+        ), true)
+        dayView.setPadding(10.dp)
+        dayScroll.layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
+        dayScroll.addView(dayView)
+        dayView
+    }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         activity = (getActivity() as MainActivity?) ?: return null
         if (context == null)
             return null
         app = activity.application as App
-        b = FragmentTimetableV2DayBinding.inflate(inflater)
+        job = Job()
+        this.inflater = AsyncLayoutInflater(context!!)
         date = arguments?.getInt("date")?.let { Date.fromValue(it) } ?: Date.getToday()
-        return b.root
+        startHour = arguments?.getInt("startHour") ?: DEFAULT_START_HOUR
+        endHour = arguments?.getInt("endHour") ?: DEFAULT_END_HOUR
+        return FrameLayout(activity).apply {
+            layoutParams = FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
+        }
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -52,45 +107,42 @@ class TimetableDayFragment() : Fragment() {
 
         Log.d(TAG, "onViewCreated, date=$date")
 
-        // Inflate a label view for each hour the day view will display
+        // observe lesson database
-        val hourLabelViews = ArrayList<View>()
-        for (i in b.day.startHour..b.day.endHour) {
-            val hourLabelView = layoutInflater.inflate(R.layout.timetable_hour_label, b.day, false) as TextView
-            hourLabelView.text = "$i:00"
-            hourLabelViews.add(hourLabelView)
-        }
-        b.day.setHourLabelViews(hourLabelViews)
-
         app.db.timetableDao().getForDate(App.profileId, date).observe(this, Observer<List<LessonFull>> { lessons ->
-            buildLessonViews(lessons)
+            processLessonList(lessons)
         })
     }
 
-    private fun buildLessonViews(lessons: List<LessonFull>) {
+    private fun processLessonList(lessons: List<LessonFull>) {
+        // no lessons - timetable not downloaded yet
         if (lessons.isEmpty()) {
-            b.dayScroll.visibility = View.GONE
+            inflater.inflate(R.layout.timetable_no_timetable, view as FrameLayout) { view, _, parent ->
-            b.noTimetableLayout.visibility = View.VISIBLE
+                parent?.removeAllViews()
-            b.noLessonsLayout.visibility = View.GONE
+                parent?.addView(view)
-            val weekStart = date.clone().stepForward(0, 0, -date.weekDay).stringY_m_d
+                val b = TimetableNoTimetableBinding.bind(view)
-            b.noTimetableSync.onClick {
+                val weekStart = date.clone().stepForward(0, 0, -date.weekDay).stringY_m_d
-                it.isEnabled = false
+                b.noTimetableSync.onClick {
-                EdziennikTask.syncProfile(
+                    it.isEnabled = false
-                        profileId = App.profileId,
+                    EdziennikTask.syncProfile(
-                        viewIds = listOf(
+                            profileId = App.profileId,
-                                DRAWER_ITEM_TIMETABLE to 0
+                            viewIds = listOf(
-                        ),
+                                    DRAWER_ITEM_TIMETABLE to 0
-                        arguments = JsonObject(
+                            ),
-                                "weekStart" to weekStart
+                            arguments = JsonObject(
-                        )
+                                    "weekStart" to weekStart
-                ).enqueue(activity)
+                            )
+                    ).enqueue(activity)
+                }
+                b.noTimetableWeek.setText(R.string.timetable_no_timetable_week, weekStart)
             }
-            b.noTimetableWeek.setText(R.string.timetable_no_timetable_week, weekStart)
             return
         }
+        // one lesson indicating a day without lessons
         if (lessons.size == 1 && lessons[0].type == Lesson.TYPE_NO_LESSONS) {
-            b.dayScroll.visibility = View.GONE
+            inflater.inflate(R.layout.timetable_no_lessons, view as FrameLayout) { view, _, parent ->
-            b.noTimetableLayout.visibility = View.GONE
+                parent?.removeAllViews()
-            b.noLessonsLayout.visibility = View.VISIBLE
+                parent?.addView(view)
+            }
             return
         }
 
@@ -101,23 +153,37 @@ class TimetableDayFragment() : Fragment() {
             return
         }
 
-        b.dayScroll.visibility = View.VISIBLE
+        // clear the root view and add the ScrollView
-        b.noTimetableLayout.visibility = View.GONE
+        (view as FrameLayout).removeAllViews()
-        b.noLessonsLayout.visibility = View.GONE
+        (view as FrameLayout).addView(dayScroll)
 
-        var firstEventMinute = 24*60
+        // Inflate a label view for each hour the day view will display
+        val hourLabelViews = ArrayList<View>()
+        for (i in dayView.startHour..dayView.endHour) {
+            val hourLabelView = layoutInflater.inflate(R.layout.timetable_hour_label, dayView, false) as TextView
+            hourLabelView.text = "$i:00"
+            hourLabelViews.add(hourLabelView)
+        }
+        dayView.setHourLabelViews(hourLabelViews)
+
+        buildLessonViews(lessons)
+    }
+
+    private fun buildLessonViews(lessons: List<LessonFull>) {
+        if (!isAdded)
+            return
 
         val eventViews = mutableListOf<View>()
         val eventTimeRanges = mutableListOf<DayView.EventTimeRange>()
 
         // Reclaim all of the existing event views so we can reuse them if needed, this process
         // can be useful if your day view is hosted in a recycler view for example
-        val recycled = b.day.removeEventViews()
+        val recycled = dayView.removeEventViews()
         var remaining = recycled?.size ?: 0
 
         val arrowRight = " → "
         val bullet = " • "
-        val colorSecondary = getColorFromAttr(activity, android.R.attr.textColorSecondary)
+        val colorSecondary = android.R.attr.textColorSecondary.resolveAttr(activity)
 
         for (lesson in lessons) {
             val startTime = lesson.displayStartTime ?: continue
@@ -127,7 +193,7 @@ class TimetableDayFragment() : Fragment() {
 
             // Try to recycle an existing event view if there are enough left, otherwise inflate
             // a new one
-            val eventView = (if (remaining > 0) recycled?.get(--remaining) else layoutInflater.inflate(R.layout.timetable_lesson, b.day, false))
+            val eventView = (if (remaining > 0) recycled?.get(--remaining) else layoutInflater.inflate(R.layout.timetable_lesson, dayView, false))
                     ?: continue
             val lb = TimetableLessonBinding.bind(eventView)
             eventViews += eventView
@@ -274,9 +340,16 @@ class TimetableDayFragment() : Fragment() {
             eventTimeRanges.add(DayView.EventTimeRange(startMinute, endMinute))
         }
 
-        val minuteHeight = (b.day.getHourTop(1) - b.day.getHourTop(0)).toFloat() / 60f
+        dayView.setEventViews(eventViews, eventTimeRanges)
-        val firstEventTop = (firstEventMinute - b.day.startHour * 60) * minuteHeight
+        val firstEventTop = (firstEventMinute - dayView.startHour * 60) * dayView.minuteHeight
-        b.day.setEventViews(eventViews, eventTimeRanges)
+        dayScroll.scrollTo(0, firstEventTop.toInt())
-        b.dayScroll.scrollTo(0, firstEventTop.toInt())
+    }
+
+    override fun onResume() {
+        super.onResume()
+        if (dayScrollDelegate.isInitialized()) {
+            val firstEventTop = (firstEventMinute - dayView.startHour * 60) * dayView.minuteHeight
+            dayScroll.scrollTo(0, firstEventTop.toInt())
+        }
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/utils/ListenerScrollView.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2019-11-16.
+ */
+
+package pl.szczodrzynski.edziennik.utils
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.widget.ScrollView
+
+class ListenerScrollView(
+        context: Context,
+        attrs: AttributeSet? = null
+) : ScrollView(context, attrs) {
+
+    private var onScrollChangedListener: ((v: ListenerScrollView, scrollX: Int, scrollY: Int, oldScrollX: Int, oldScrollY: Int) -> Unit)? = null
+    private var onRefreshLayoutEnabledListener: ((enabled: Boolean) -> Unit)? = null
+    private var refreshLayoutEnabled = true
+
+    init {
+        setOnTouchListener { _, event ->
+            if (event.action == MotionEvent.ACTION_UP) {
+                refreshLayoutEnabled = scrollY < 10
+                onRefreshLayoutEnabledListener?.invoke(refreshLayoutEnabled)
+            }
+            false
+        }
+    }
+
+    override fun onScrollChanged(l: Int, t: Int, oldl: Int, oldt: Int) {
+        onScrollChangedListener?.invoke(this, l, t, oldl, oldt)
+        if (t > 10 && refreshLayoutEnabled) {
+            refreshLayoutEnabled = false
+            onRefreshLayoutEnabledListener?.invoke(refreshLayoutEnabled)
+        }
+    }
+
+    fun setOnScrollChangedListener(l: ((v: ListenerScrollView, scrollX: Int, scrollY: Int, oldScrollX: Int, oldScrollY: Int) -> Unit)?) {
+        onScrollChangedListener = l
+    }
+
+    fun setOnRefreshLayoutEnabledListener(l: ((enabled: Boolean) -> Unit)?) {
+        onRefreshLayoutEnabledListener = l
+    }
+}

app/src/main/res/layout/fragment_timetable_v2.xml

@@ -2,89 +2,96 @@
 <layout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools">
-    <FrameLayout
+
+    <pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator
+        android:id="@+id/refreshLayout"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <androidx.coordinatorlayout.widget.CoordinatorLayout
+        <FrameLayout
-            android:id="@+id/timetableLayout"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"
+            android:layout_height="match_parent">
-            tools:visibility="gone">
 
-            <com.google.android.material.appbar.AppBarLayout
+            <androidx.coordinatorlayout.widget.CoordinatorLayout
-                android:layout_width="match_parent"
+                android:id="@+id/timetableLayout"
-                android:layout_height="wrap_content"
-                android:background="?colorSurface"
-                style="@style/Widget.MaterialComponents.AppBarLayout.Surface">
-
-                <com.nshmura.recyclertablayout.RecyclerTabLayout
-                    android:id="@+id/tabLayout"
-                    android:layout_width="match_parent"
-                    android:layout_height="48dp"
-                    android:background="@color/colorSurface_6dp"
-                    app:rtl_tabTextAppearance="@style/rtl_RecyclerTabLayout.Tab"
-                    app:rtl_tabIndicatorColor="?colorPrimary"
-                    app:rtl_tabMinWidth="90dp"
-                    app:rtl_tabMaxWidth="300dp"
-                    app:rtl_tabSelectedTextColor="?colorPrimary"
-                    app:rtl_tabPaddingStart="16dp"
-                    app:rtl_tabPaddingEnd="16dp"
-                    app:rtl_tabPaddingTop="12dp"
-                    app:rtl_tabPaddingBottom="12dp"/>
-            </com.google.android.material.appbar.AppBarLayout>
-
-            <androidx.viewpager.widget.ViewPager
-                android:id="@+id/viewPager"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+                tools:visibility="gone">
 
-        </androidx.coordinatorlayout.widget.CoordinatorLayout>
+                <com.google.android.material.appbar.AppBarLayout
+                    style="@style/Widget.MaterialComponents.AppBarLayout.Surface"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:background="?colorSurface">
 
-        <LinearLayout
+                    <com.nshmura.recyclertablayout.RecyclerTabLayout
-            android:id="@+id/timetableNotPublicLayout"
+                        android:id="@+id/tabLayout"
-            android:layout_width="match_parent"
+                        android:layout_width="match_parent"
-            android:layout_height="match_parent"
+                        android:layout_height="48dp"
-            android:orientation="vertical"
+                        android:background="@color/colorSurface_6dp"
-            android:visibility="gone"
+                        app:rtl_tabIndicatorColor="?colorPrimary"
-            android:gravity="center"
+                        app:rtl_tabMaxWidth="300dp"
-            tools:visibility="visible">
+                        app:rtl_tabMinWidth="90dp"
+                        app:rtl_tabPaddingBottom="12dp"
+                        app:rtl_tabPaddingEnd="16dp"
+                        app:rtl_tabPaddingStart="16dp"
+                        app:rtl_tabPaddingTop="12dp"
+                        app:rtl_tabSelectedTextColor="?colorPrimary"
+                        app:rtl_tabTextAppearance="@style/rtl_RecyclerTabLayout.Tab" />
+                </com.google.android.material.appbar.AppBarLayout>
 
-            <ImageView
+                <androidx.viewpager.widget.ViewPager
-                android:layout_width="wrap_content"
+                    android:id="@+id/viewPager"
-                android:layout_height="wrap_content"
+                    android:layout_width="match_parent"
-                app:srcCompat="@drawable/ic_no_timetable" />
+                    android:layout_height="match_parent"
+                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
-            <TextView
+            </androidx.coordinatorlayout.widget.CoordinatorLayout>
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:fontFamily="sans-serif-light"
-                android:text="@string/timetable_not_public_title"
-                android:textSize="24sp" />
 
-            <TextView
+            <LinearLayout
-                android:layout_width="wrap_content"
+                android:id="@+id/timetableNotPublicLayout"
-                android:layout_height="wrap_content"
+                android:layout_width="match_parent"
-                android:layout_marginTop="16dp"
+                android:layout_height="match_parent"
-                android:layout_marginStart="32dp"
-                android:layout_marginEnd="32dp"
                 android:gravity="center"
-                android:text="@string/timetable_not_public_text"
+                android:orientation="vertical"
-                android:textSize="16sp" />
+                android:visibility="gone"
+                tools:visibility="visible">
 
-            <TextView
+                <ImageView
-                android:layout_width="wrap_content"
+                    android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
+                    android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
+                    app:srcCompat="@drawable/ic_no_timetable" />
-                android:layout_marginStart="32dp"
-                android:layout_marginEnd="32dp"
-                android:gravity="center"
-                android:text="@string/timetable_not_public_hint"
-                android:textSize="14sp" />
 
-        </LinearLayout>
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="16dp"
+                    android:fontFamily="sans-serif-light"
+                    android:text="@string/timetable_not_public_title"
+                    android:textSize="24sp" />
 
-    </FrameLayout>
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="32dp"
+                    android:layout_marginTop="16dp"
+                    android:layout_marginEnd="32dp"
+                    android:gravity="center"
+                    android:text="@string/timetable_not_public_text"
+                    android:textSize="16sp" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="32dp"
+                    android:layout_marginTop="16dp"
+                    android:layout_marginEnd="32dp"
+                    android:gravity="center"
+                    android:text="@string/timetable_not_public_hint"
+                    android:textSize="14sp" />
+
+            </LinearLayout>
+
+        </FrameLayout>
+    </pl.szczodrzynski.edziennik.utils.SwipeRefreshLayoutNoIndicator>
 </layout>

app/src/main/res/layout/fragment_timetable_v2_day.xml

@@ -28,126 +28,5 @@
                 tools:visibility="gone"/>
         </ScrollView>
 
-        <LinearLayout
-            android:id="@+id/noLessonsLayout"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:visibility="gone"
-            android:gravity="center"
-            tools:visibility="gone">
-
-            <ImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                app:srcCompat="@drawable/ic_timetable" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:fontFamily="sans-serif-light"
-                android:text="@string/timetable_no_lessons_title"
-                android:textSize="24sp" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            android:id="@+id/freeDayLayout"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:visibility="gone"
-            android:gravity="center"
-            tools:visibility="gone">
-
-            <ImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                app:srcCompat="@drawable/ic_sunbed" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:fontFamily="sans-serif-light"
-                android:text="@string/timetable_free_day_title"
-                android:textSize="24sp" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:text="@string/timetable_free_day_text"
-                android:textSize="14sp" />
-
-            <TextView
-                android:id="@+id/freeDayText"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginStart="32dp"
-                android:layout_marginEnd="32dp"
-                android:gravity="center"
-                tools:text="Dzień wolny dla szkoły z puli dyrektorskiej z okazji obchodów Światowego Dnia Wtorku w mieście Poznań i na przedmieśiach"
-                android:textSize="16sp" />
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/freeDayShowTimetable"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:text="@string/timetable_free_day_show" />
-
-        </LinearLayout>
-
-        <LinearLayout
-            android:id="@+id/noTimetableLayout"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:visibility="gone"
-            android:gravity="center"
-            tools:visibility="visible">
-
-            <ImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                app:srcCompat="@drawable/ic_sync" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:fontFamily="sans-serif-light"
-                android:text="@string/timetable_no_timetable_title"
-                android:textSize="24sp" />
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:layout_marginStart="32dp"
-                android:layout_marginEnd="32dp"
-                android:gravity="center"
-                android:text="@string/timetable_no_timetable_text"
-                android:textSize="16sp" />
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/noTimetableSync"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="16dp"
-                android:text="@string/timetable_no_timetable_sync" />
-
-            <TextView
-                android:id="@+id/noTimetableWeek"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                tools:text="@string/timetable_no_timetable_week"
-                android:textSize="12sp"
-                android:textStyle="italic"/>
-
-        </LinearLayout>
-
     </FrameLayout>
 </layout>

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

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2019-11-15.
+  -->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/freeDayLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:drawableTop="@drawable/ic_sunbed"
+        android:drawablePadding="16dp"
+        android:fontFamily="sans-serif-light"
+        android:text="@string/timetable_free_day_title"
+        android:textSize="24sp" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/timetable_free_day_text"
+        android:textSize="14sp" />
+
+    <TextView
+        android:id="@+id/freeDayText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="32dp"
+        android:layout_marginEnd="32dp"
+        android:gravity="center"
+        android:textSize="16sp"
+        tools:text="Dzień wolny dla szkoły z puli dyrektorskiej z okazji obchodów Światowego Dnia Wtorku w mieście Poznań i na przedmieśiach" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/freeDayShowTimetable"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/timetable_free_day_show" />
+
+</LinearLayout>

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) Kuba Szczodrzyński 2019-11-15.
+  -->
+
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:drawableTop="@drawable/ic_timetable"
+    android:drawablePadding="16dp"
+    android:fontFamily="sans-serif-light"
+    android:text="@string/timetable_no_lessons_title"
+    android:textSize="24sp" />

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

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright (c) Kuba Szczodrzyński 2019-11-15.
+  -->
+
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <LinearLayout
+        android:id="@+id/noTimetableLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:drawableTop="@drawable/ic_sync"
+            android:drawablePadding="16dp"
+            android:fontFamily="sans-serif-light"
+            android:text="@string/timetable_no_timetable_title"
+            android:textSize="24sp" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="32dp"
+            android:layout_marginTop="16dp"
+            android:layout_marginEnd="32dp"
+            android:gravity="center"
+            android:text="@string/timetable_no_timetable_text"
+            android:textSize="16sp" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/noTimetableSync"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/timetable_no_timetable_sync" />
+
+        <TextView
+            android:id="@+id/noTimetableWeek"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="12sp"
+            android:textStyle="italic"
+            tools:text="@string/timetable_no_timetable_week" />
+
+    </LinearLayout>
+</layout>

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

@@ -101,6 +101,8 @@
         <item name="timetable_lesson_change_color">#ffb300</item>
         <item name="timetable_lesson_shifted_source_color">#A1887F</item>
         <item name="timetable_lesson_shifted_target_color">#4caf50</item>
+        <item name="hourDividerColor">#b0b0b0</item>
+        <item name="halfHourDividerColor">#e0e0e0</item>
     </style>
     <style name="AppTheme.Dark" parent="NavView.Dark">
         <item name="colorPrimary">#64b5f6</item>
@@ -131,6 +133,8 @@
         <item name="timetable_lesson_change_color">#ffb300</item>
         <item name="timetable_lesson_shifted_source_color">#A1887F</item>
         <item name="timetable_lesson_shifted_target_color">#4caf50</item>
+        <item name="hourDividerColor">#7fffffff</item>
+        <item name="halfHourDividerColor">#40ffffff</item>
     </style>