add the scrolling views

app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt

@@ -18,8 +18,10 @@ import com.simplemobiletools.calendar.dialogs.ChangeViewDialog
 import com.simplemobiletools.calendar.extensions.config
 import com.simplemobiletools.calendar.extensions.updateWidgets
 import com.simplemobiletools.calendar.fragments.EventListFragment
+import com.simplemobiletools.calendar.fragments.WeekFragment
 import com.simplemobiletools.calendar.helpers.*
 import com.simplemobiletools.calendar.helpers.Formatter
+import com.simplemobiletools.calendar.views.MyScrollView
 import com.simplemobiletools.commons.extensions.checkWhatsNew
 import com.simplemobiletools.commons.extensions.updateTextColors
 import com.simplemobiletools.commons.helpers.LICENSE_JODA
@@ -40,6 +42,10 @@ class MainActivity : SimpleActivity(), EventListFragment.DeleteListener {
     private var mEventListFragment: EventListFragment? = null
     private var mStoredTextColor = 0
 
+    companion object {
+        var mWeekScrollY = 0
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
@@ -116,6 +122,8 @@ class MainActivity : SimpleActivity(), EventListFragment.DeleteListener {
             val targetDay = DateTime().toString(Formatter.DAYCODE_PATTERN)
             fillMonthlyViewPager(targetDay)
         }
+
+        mWeekScrollY = 0
     }
 
     private fun launchSettings() {
@@ -161,7 +169,12 @@ class MainActivity : SimpleActivity(), EventListFragment.DeleteListener {
     }
 
     private fun fillWeeklyViewPager() {
-        val weeklyAdapter = MyWeekPagerAdapter(supportFragmentManager)
+        val weeklyAdapter = MyWeekPagerAdapter(supportFragmentManager, object : WeekFragment.WeekScrollListener {
+            override fun scrollTo(y: Int) {
+                week_view_hours_scrollview.scrollY = y
+                mWeekScrollY = y
+            }
+        })
         main_view_pager.visibility = View.GONE
         calendar_event_list_holder.visibility = View.GONE
         main_weekly_scrollview.visibility = View.VISIBLE
@@ -173,6 +186,15 @@ class MainActivity : SimpleActivity(), EventListFragment.DeleteListener {
             view.text = if (value.length == 2) value else "0$value"
             week_view_hours_holder.addView(view)
         }
+
+        week_view_view_pager.adapter = weeklyAdapter
+
+        week_view_hours_scrollview.setOnScrollviewListener(object : MyScrollView.ScrollViewListener {
+            override fun onScrollChanged(scrollView: MyScrollView, x: Int, y: Int, oldx: Int, oldy: Int) {
+                mWeekScrollY = y
+                weeklyAdapter.updateScrollY(week_view_view_pager.currentItem, y)
+            }
+        })
     }
 
     private fun fillYearlyViewPager() {

app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyWeekPagerAdapter.kt

@@ -4,16 +4,26 @@ import android.os.Bundle
 import android.support.v4.app.Fragment
 import android.support.v4.app.FragmentManager
 import android.support.v4.app.FragmentStatePagerAdapter
+import android.util.SparseArray
 import com.simplemobiletools.calendar.fragments.WeekFragment
 
-class MyWeekPagerAdapter(fm: FragmentManager) : FragmentStatePagerAdapter(fm) {
+class MyWeekPagerAdapter(fm: FragmentManager, private val mListener: WeekFragment.WeekScrollListener) : FragmentStatePagerAdapter(fm) {
+    private val mFragments = SparseArray<WeekFragment>()
 
-    override fun getCount() = 1
+    override fun getCount() = 3
 
     override fun getItem(position: Int): Fragment {
         val bundle = Bundle()
         val fragment = WeekFragment()
         fragment.arguments = bundle
+        fragment.setListener(mListener)
+
+        mFragments.put(position, fragment)
         return fragment
     }
+
+    fun updateScrollY(pos: Int, y: Int) {
+        (-1..1).map { mFragments[pos + it] }
+                .forEach { it?.updateScrollY(y) }
+    }
 }

app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt

@@ -5,17 +5,36 @@ import android.support.v4.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.ViewTreeObserver
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.activities.MainActivity
 import com.simplemobiletools.calendar.helpers.DBHelper
 import com.simplemobiletools.calendar.models.Event
+import com.simplemobiletools.calendar.views.MyScrollView
+import kotlinx.android.synthetic.main.fragment_week.view.*
 import java.util.*
 import kotlin.comparisons.compareBy
 
 class WeekFragment : Fragment(), DBHelper.GetEventsListener {
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+    private var mListener: WeekScrollListener? = null
-        val view = inflater.inflate(R.layout.fragment_week, container, false)
+    lateinit var mView: View
 
-        return view
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        mView = inflater.inflate(R.layout.fragment_week, container, false)
+
+        mView.week_events_scrollview.setOnScrollviewListener(object : MyScrollView.ScrollViewListener {
+            override fun onScrollChanged(scrollView: MyScrollView, x: Int, y: Int, oldx: Int, oldy: Int) {
+                mListener?.scrollTo(y)
+            }
+        })
+
+        mView.week_events_scrollview.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
+            override fun onGlobalLayout() {
+                updateScrollY(MainActivity.mWeekScrollY)
+                mView.week_events_scrollview.viewTreeObserver.removeOnGlobalLayoutListener(this)
+            }
+        })
+        return mView
     }
 
     override fun gotEvents(events: MutableList<Event>) {
@@ -24,4 +43,16 @@ class WeekFragment : Fragment(), DBHelper.GetEventsListener {
 
         }
     }
+
+    fun setListener(listener: WeekScrollListener) {
+        mListener = listener
+    }
+
+    fun updateScrollY(y: Int) {
+        mView.week_events_scrollview.scrollY = y
+    }
+
+    interface WeekScrollListener {
+        fun scrollTo(y: Int)
+    }
 }

app/src/main/kotlin/com/simplemobiletools/calendar/views/MyScrollView.kt

@@ -0,0 +1,28 @@
+package com.simplemobiletools.calendar.views
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.ScrollView
+
+class MyScrollView : ScrollView {
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle)
+
+    var scrollViewListener: ScrollViewListener? = null
+
+    fun setOnScrollviewListener(scrollViewListener: ScrollViewListener) {
+        this.scrollViewListener = scrollViewListener
+    }
+
+    override fun onScrollChanged(x: Int, y: Int, oldx: Int, oldy: Int) {
+        super.onScrollChanged(x, y, oldx, oldy)
+        scrollViewListener?.onScrollChanged(this, x, y, oldx, oldy)
+    }
+
+    interface ScrollViewListener {
+        fun onScrollChanged(scrollView: MyScrollView, x: Int, y: Int, oldx: Int, oldy: Int)
+    }
+}

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

@@ -6,7 +6,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <ScrollView
+    <LinearLayout
         android:id="@+id/main_weekly_scrollview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -19,17 +19,29 @@
             android:layout_height="wrap_content"
             android:orientation="horizontal">
 
+            <com.simplemobiletools.calendar.views.MyScrollView
+                android:id="@+id/week_view_hours_scrollview"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="@dimen/weekly_view_day_letters_height"
+                android:overScrollMode="never"
+                android:scrollbars="none">
+
                 <LinearLayout
                     android:id="@+id/week_view_hours_holder"
-                android:layout_width="match_parent"
+                    android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:orientation="vertical"
-                android:paddingBottom="@dimen/weekly_view_row_height">
+                    android:paddingBottom="@dimen/weekly_view_row_height"/>
+            </com.simplemobiletools.calendar.views.MyScrollView>
+
+            <com.simplemobiletools.commons.views.MyViewPager
+                android:id="@+id/week_view_view_pager"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"/>
 
         </LinearLayout>
-
     </LinearLayout>
-    </ScrollView>
 
     <com.simplemobiletools.commons.views.MyViewPager
         android:id="@+id/main_view_pager"

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

@@ -1,8 +1,87 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
+<LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/week_holder"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
-</RelativeLayout>
+    <LinearLayout
+        android:id="@+id/week_letters_holder"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/weekly_view_day_letters_height"
+        android:gravity="center_vertical"
+        android:orientation="horizontal">
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/monday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/tuesday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/wednesday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/thursday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/friday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/saturday_letter"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:gravity="center_horizontal"
+            android:text="@string/sunday_letter"/>
+
+    </LinearLayout>
+
+    <com.simplemobiletools.calendar.views.MyScrollView
+        android:id="@+id/week_events_scrollview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true"
+        android:overScrollMode="never"
+        android:scrollbars="none">
+
+        <LinearLayout
+            android:id="@+id/week_events_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <android.support.v4.widget.Space
+                android:layout_width="wrap_content"
+                android:layout_height="@dimen/weekly_view_events_height"/>
+
+        </LinearLayout>
+    </com.simplemobiletools.calendar.views.MyScrollView>
+</LinearLayout>

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

@@ -4,6 +4,8 @@
     <dimen name="yearly_padding_full">6dp</dimen>
 
     <dimen name="weekly_view_row_height">60dp</dimen>
+    <dimen name="weekly_view_events_height">1440dp</dimen>      <!-- weekly_view_row_height * 24 hours -->
+    <dimen name="weekly_view_day_letters_height">24dp</dimen>
 
     <dimen name="min_widget_width">250dp</dimen>
     <dimen name="min_widget_height">250dp</dimen>