Migrate "Schedule Changes" screen to Compose UI.

+ Replace XML-based screen with Compose UI setup.
+ Detach from AbstractListFragment.
+ Introduce SessionChangeParametersFactory to encapsulate screen logic. Add unit tests.
+ Let video recording icon color represent change state similar as text changes.
+ Remove now unused code from SessionsAdapter which is still used by "Favorites" screen.
+ Vertical scroll bar is missing.

app/src/main/java/nerd/tuxmobil/fahrplan/congress/base/SessionsAdapter.kt

@@ -76,8 +76,6 @@ abstract class SessionsAdapter protected constructor(
                         time = rowView.requireViewByIdCompat(R.id.session_list_item_time_view),
                         room = rowView.requireViewByIdCompat(R.id.session_list_item_room_view),
                         duration = rowView.requireViewByIdCompat(R.id.session_list_item_duration_view),
-                        video = rowView.requireViewByIdCompat(R.id.session_list_item_video_view),
-                        noVideo = rowView.requireViewByIdCompat(R.id.session_list_item_no_video_view),
                         withoutVideoRecording = rowView.requireViewByIdCompat(R.id.session_list_item_without_video_recording_view),
                     )
                     rowView.tag = viewHolder
@@ -187,8 +185,6 @@ abstract class SessionsAdapter protected constructor(
         var time: TextView,
         var room: TextView,
         var duration: TextView,
-        var noVideo: ImageView,
-        var video: ImageView,
         var withoutVideoRecording: ImageView
     )
 

app/src/main/java/nerd/tuxmobil/fahrplan/congress/changes/ChangeListFragment.kt

@@ -6,36 +6,37 @@ import android.view.ContextThemeWrapper
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.HeaderViewListAdapter
-import android.widget.ListView
 import androidx.annotation.CallSuper
 import androidx.annotation.IdRes
 import androidx.annotation.MainThread
+import androidx.compose.runtime.collectAsState
+import androidx.compose.ui.platform.ComposeView
+import androidx.compose.ui.platform.ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed
+import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.viewModels
 import info.metadude.android.eventfahrplan.commons.flow.observe
 import nerd.tuxmobil.fahrplan.congress.R
-import nerd.tuxmobil.fahrplan.congress.base.AbstractListFragment
 import nerd.tuxmobil.fahrplan.congress.base.AbstractListFragment.OnSessionListClick
+import nerd.tuxmobil.fahrplan.congress.commons.ResourceResolver
+import nerd.tuxmobil.fahrplan.congress.commons.ScreenNavigation
 import nerd.tuxmobil.fahrplan.congress.contract.BundleKeys
 import nerd.tuxmobil.fahrplan.congress.extensions.replaceFragment
-import nerd.tuxmobil.fahrplan.congress.extensions.requireViewByIdCompat
 import nerd.tuxmobil.fahrplan.congress.extensions.withArguments
 import nerd.tuxmobil.fahrplan.congress.notifications.NotificationHelper
+import nerd.tuxmobil.fahrplan.congress.repositories.AppRepository
 import nerd.tuxmobil.fahrplan.congress.utils.ContentDescriptionFormatter
 import nerd.tuxmobil.fahrplan.congress.utils.SessionPropertiesFormatter
 
 /**
  * A fragment representing a list of Items.
  *
- * Large screen devices (such as tablets) are supported by replacing the ListView with a GridView.
- *
  * Activities containing this fragment MUST implement the [OnSessionListClick] interface.
  *
  * Mandatory empty constructor for the fragment manager to instantiate the fragment (e.g. upon
  * screen orientation changes).
  */
-class ChangeListFragment : AbstractListFragment() {
+class ChangeListFragment : Fragment() {
 
     companion object {
 
@@ -55,8 +56,16 @@ class ChangeListFragment : AbstractListFragment() {
     }
 
     private var onSessionListClickListener: OnSessionListClick? = null
-    private lateinit var currentListView: ListView
-    private val viewModelFactory by lazy { ChangeListViewModelFactory(appRepository) }
+    private lateinit var screenNavigation: ScreenNavigation
+    private val viewModelFactory by lazy {
+        ChangeListViewModelFactory(
+            AppRepository,
+            ResourceResolver(requireContext()),
+            screenNavigation,
+            SessionPropertiesFormatter(),
+            ContentDescriptionFormatter(requireContext()),
+        )
+    }
     private val viewModel: ChangeListViewModel by viewModels { viewModelFactory }
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
@@ -65,16 +74,18 @@ class ChangeListFragment : AbstractListFragment() {
 
         val contextThemeWrapper = ContextThemeWrapper(requireContext(), R.style.Theme_Congress_NoActionBar)
         val localInflater = inflater.cloneInContext(contextThemeWrapper)
-        val (fragmentLayout, headerLayout) = when {
-            sidePane -> R.layout.fragment_session_list_narrow to R.layout.changes_header
-            else -> R.layout.fragment_session_list to R.layout.header_empty
+        val fragmentView = localInflater.inflate(R.layout.fragment_session_list, container, false)
+        fragmentView.findViewById<ComposeView>(R.id.session_changes_view).apply {
+            setViewCompositionStrategy(DisposeOnViewTreeLifecycleDestroyed)
+            setContent {
+                SessionChangesScreen(
+                    state = viewModel.sessionChangesState.collectAsState().value,
+                    showInSidePane = sidePane,
+                    onViewEvent = viewModel::onViewEvent,
+                )
+            }
+            isClickable = true
         }
-
-        val fragmentView = localInflater.inflate(fragmentLayout, container, false)
-        val headerView = localInflater.inflate(headerLayout, null, false)
-        currentListView = fragmentView.requireViewByIdCompat(android.R.id.list)
-        currentListView.addHeaderView(headerView, null, false)
-        currentListView.setHeaderDividersEnabled(false)
         return fragmentView
     }
 
@@ -84,17 +95,6 @@ class ChangeListFragment : AbstractListFragment() {
     }
 
     private fun observeViewModel() {
-        viewModel.changeListParameter.observe(this) { (sessions, numDays, useDeviceTimeZone) ->
-            val adapter = ChangeListAdapter(
-                context = requireContext(),
-                list = sessions,
-                numDays = numDays,
-                useDeviceTimeZone = useDeviceTimeZone,
-                sessionPropertiesFormatter = SessionPropertiesFormatter(),
-                contentDescriptionFormatter = ContentDescriptionFormatter(requireContext())
-            )
-            currentListView.adapter = adapter
-        }
         viewModel.scheduleChangesSeen.observe(viewLifecycleOwner) {
             NotificationHelper(requireContext()).cancelScheduleUpdateNotification()
         }
@@ -111,6 +111,9 @@ class ChangeListFragment : AbstractListFragment() {
         super.onAttach(context)
         if (context is OnSessionListClick) {
             onSessionListClickListener = context
+            screenNavigation = ScreenNavigation { sessionId ->
+                onSessionListClickListener?.onSessionListClick(sessionId)
+            }
         } else {
             error("$context must implement OnSessionListClick")
         }
@@ -123,17 +126,4 @@ class ChangeListFragment : AbstractListFragment() {
         onSessionListClickListener = null
     }
 
-    override fun onListItemClick(listView: ListView, view: View, listPosition: Int, rowId: Long) {
-        val headerViewListAdapter = currentListView.adapter as HeaderViewListAdapter
-        val adapter = headerViewListAdapter.wrappedAdapter as ChangeListAdapter
-        onSessionListClickListener?.let { listener ->
-            // Notify the active callbacks interface (the activity, if the
-            // fragment is attached to one) that an item has been selected.
-            val clicked = adapter.getSession(listPosition - 1)
-            if (!clicked.changedIsCanceled) {
-                listener.onSessionListClick(clicked.sessionId)
-            }
-        }
-    }
-
 }