Add swipe to delete for DataListFragment

app/src/main/java/net/pokeranalytics/android/ui/fragment/DataListFragment.kt

@@ -4,11 +4,11 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import androidx.core.view.isVisible
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.snackbar.Snackbar
 import io.realm.Realm
+import io.realm.RealmObject
 import io.realm.RealmResults
 import kotlinx.android.synthetic.main.fragment_data_list.*
 import net.pokeranalytics.android.R
@@ -19,17 +19,20 @@ import net.pokeranalytics.android.ui.adapter.LiveRowRepresentableDataSource
 import net.pokeranalytics.android.ui.adapter.RowRepresentableAdapter
 import net.pokeranalytics.android.ui.adapter.RowRepresentableDelegate
 import net.pokeranalytics.android.ui.fragment.components.PokerAnalyticsFragment
+import net.pokeranalytics.android.ui.helpers.SwipeToDeleteCallback
 import net.pokeranalytics.android.ui.view.RowRepresentable
 import net.pokeranalytics.android.ui.view.RowViewType
 import net.pokeranalytics.android.ui.view.rowrepresentable.SettingRow
-import timber.log.Timber
 
 
 class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSource, RowRepresentableDelegate {
 
-	lateinit var dataType: SettingRow
+	private lateinit var dataType: SettingRow
-
 	private lateinit var items: RealmResults<*>
+	private lateinit var dataListAdapter: RowRepresentableAdapter
+
+	private var deletedItem: RealmObject? = null
+	private var lastDeletedItemPosition: Int = 0
 
 	override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
 		return inflater.inflate(R.layout.fragment_data_list, container, false)
@@ -37,14 +40,12 @@ class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSourc
 
 	override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
 		super.onViewCreated(view, savedInstanceState)
-		initData()
 		initUI()
 	}
 
 	override fun onResume() {
 		super.onResume()
 		this.recyclerView?.adapter?.notifyDataSetChanged()
-		noDataFound.isVisible = items.isEmpty()
 	}
 
 	override fun rowRepresentableForPosition(position: Int): RowRepresentable? {
@@ -68,15 +69,11 @@ class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSourc
 			EditableDataActivity.newInstance(
 				requireContext(),
 				it.ordinal,
-				(this.items[position] as Savable).uniqueIdentifier()
+				(row as Savable).uniqueIdentifier()
 			)
 		}
 	}
 
-
-	private fun initData() {
-	}
-
 	/**
 	 * Init UI
 	 */
@@ -91,40 +88,32 @@ class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSourc
 		activity.supportActionBar?.setDisplayHomeAsUpEnabled(true)
 		setHasOptionsMenu(true)
 
-		// Swipe to delete, work in progress
+		val viewManager = LinearLayoutManager(requireContext())
-		val itemTouchHelper = ItemTouchHelper(object : ItemTouchHelper.Callback() {
+		dataListAdapter = RowRepresentableAdapter(this, this)
 
-			override fun getMovementFlags(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder): Int {
+		val swipeToDelete = SwipeToDeleteCallback(dataListAdapter) { position ->
 
-				return makeFlag(
+			// Save the delete position & create a copy of the object
-					ItemTouchHelper.ACTION_STATE_SWIPE, ItemTouchHelper.START or ItemTouchHelper.END
+			val mRecentlyDeletedItem = rowRepresentableForPosition(position)
-				)
+			lastDeletedItemPosition = position
-			}
 
-			override fun onMove(
+			if (mRecentlyDeletedItem is RealmObject) {
-				recyclerView: RecyclerView,
+				deletedItem = getRealm().copyFromRealm(mRecentlyDeletedItem)
-				viewHolder: RecyclerView.ViewHolder,
+				getRealm().executeTransaction {
-				target: RecyclerView.ViewHolder
+					mRecentlyDeletedItem.deleteFromRealm()
-			): Boolean {
-				return false
 				}
-
+				dataListAdapter.notifyItemRemoved(position)
-			override fun clearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
+				showUndoSnackBar()
-				super.clearView(recyclerView, viewHolder)
 			}
-
-			override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
 		}
-		})
 
-		val viewManager = LinearLayoutManager(requireContext())
+		val itemTouchHelper = ItemTouchHelper(swipeToDelete)
-		val dataListAdapter = RowRepresentableAdapter(this, this)
 
 		recyclerView.apply {
 			setHasFixedSize(true)
 			layoutManager = viewManager
 			adapter = dataListAdapter
-			//itemTouchHelper.attachToRecyclerView(this)
+			itemTouchHelper.attachToRecyclerView(this)
 		}
 
 		this.addButton.setOnClickListener {
@@ -136,7 +125,23 @@ class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSourc
 				)
 			}
 		}
+	}
 
+	/**
+	 * Show undo snack bar
+	 */
+	private fun showUndoSnackBar() {
+		val message = String.format(getString(R.string.data_deleted), this.dataType.localizedTitle(requireContext()))
+		val snackBar = Snackbar.make(constraintLayout, message, Snackbar.LENGTH_LONG)
+		snackBar.setAction(R.string.cancel) {
+			getRealm().executeTransaction {realm ->
+				deletedItem?.let {
+					realm.copyToRealm(it)
+					dataListAdapter.notifyItemInserted(lastDeletedItemPosition)
+				}
+			}
+		}
+		snackBar.show()
 	}
 
 	/**
@@ -144,13 +149,10 @@ class DataListFragment : PokerAnalyticsFragment(), LiveRowRepresentableDataSourc
 	 */
 	fun setData(dataType: Int) {
 		this.dataType = SettingRow.values()[dataType]
-
 		this.toolbar.title = this.dataType.localizedTitle(requireContext())
 		val realm = Realm.getDefaultInstance()
-
 		this.dataType.relatedResultsRepresentable?.let {
 			this.items = it.items(realm)
-			noDataFound.isVisible = this.items.isEmpty()
 		}
 	}
 }

app/src/main/java/net/pokeranalytics/android/ui/helpers/SwipeToDeleteCallback.kt

@@ -0,0 +1,68 @@
+package net.pokeranalytics.android.ui.helpers
+
+import android.graphics.Canvas
+import android.view.View
+import androidx.core.view.isVisible
+import androidx.recyclerview.widget.ItemTouchHelper
+import androidx.recyclerview.widget.RecyclerView
+import net.pokeranalytics.android.R
+import net.pokeranalytics.android.ui.adapter.RowRepresentableAdapter
+
+/**
+ * Swipe to delete callback
+ */
+class SwipeToDeleteCallback(var adapter: RowRepresentableAdapter, var onDelete: ((position: Int) -> Unit)? = null) :
+	ItemTouchHelper.SimpleCallback(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.START or ItemTouchHelper.END) {
+
+	override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
+		return false
+	}
+
+	override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+		val position = viewHolder.adapterPosition
+		onDelete?.invoke(position)
+	}
+
+	override fun onChildDraw(
+		c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder,
+		dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean
+	) {
+		val foregroundView = viewHolder.itemView.findViewById<View?>(net.pokeranalytics.android.R.id.foreground)
+		val backgroundView = viewHolder.itemView.findViewById<View?>(net.pokeranalytics.android.R.id.background)
+		foregroundView?.let {
+			getDefaultUIUtil().onDraw(c, recyclerView, foregroundView, dX, dY, actionState, isCurrentlyActive)
+			backgroundView?.findViewById<View?>(R.id.leftIcon)?.isVisible = dX > 0
+			backgroundView?.findViewById<View?>(R.id.rightIcon)?.isVisible = dX < 0
+		}
+	}
+
+
+	override fun clearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
+		val foregroundView = viewHolder.itemView.findViewById<View?>(net.pokeranalytics.android.R.id.foreground)
+		foregroundView?.let {
+			getDefaultUIUtil().clearView(foregroundView)
+		}
+	}
+
+	override fun onSelectedChanged(viewHolder: RecyclerView.ViewHolder?, actionState: Int) {
+		viewHolder?.let {
+			val foregroundView = viewHolder.itemView.findViewById<View?>(net.pokeranalytics.android.R.id.foreground)
+			foregroundView?.let {
+				getDefaultUIUtil().onSelected(foregroundView)
+			}
+		}
+	}
+
+	override fun onChildDrawOver(
+		c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder?, dX: Float, dY: Float,
+		actionState: Int, isCurrentlyActive: Boolean
+	) {
+		viewHolder?.let {
+			val foregroundView = viewHolder.itemView.findViewById<View?>(net.pokeranalytics.android.R.id.foreground)
+			foregroundView?.let {
+				getDefaultUIUtil().onDrawOver(c, recyclerView, foregroundView, dX, dY, actionState, isCurrentlyActive)
+			}
+		}
+	}
+
+}

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

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.coordinatorlayout.widget.CoordinatorLayout 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"
 	android:id="@+id/container"
 	android:layout_width="match_parent"
-	android:layout_height="match_parent"
+	android:layout_height="match_parent">
-	xmlns:tools="http://schemas.android.com/tools">
 
 	<androidx.core.widget.NestedScrollView
 		android:id="@+id/nestedScrollView"
@@ -24,30 +24,30 @@
 				android:layout_height="0dp"
 				android:clipToPadding="false"
 				android:paddingBottom="96dp"
-				tools:listitem="@layout/row_title"
 				app:layout_constraintBottom_toBottomOf="parent"
 				app:layout_constraintEnd_toEndOf="parent"
 				app:layout_constraintStart_toStartOf="parent"
-				app:layout_constraintTop_toTopOf="parent" />
+				app:layout_constraintTop_toTopOf="parent"
+				tools:listitem="@layout/row_title" />
 
 			<androidx.appcompat.widget.AppCompatTextView
 				android:id="@+id/noDataFound"
+				style="@style/PokerAnalyticsTheme.TextView.Header"
 				android:layout_width="wrap_content"
 				android:layout_height="wrap_content"
 				android:layout_marginStart="8dp"
 				android:layout_marginTop="8dp"
 				android:layout_marginEnd="8dp"
 				android:layout_marginBottom="8dp"
-				style="@style/PokerAnalyticsTheme.TextView.Header"
-				android:textSize="24sp"
 				android:text="@string/no_data_found"
+				android:textSize="24sp"
 				android:visibility="gone"
-				tools:visibility="visible"
 				app:layout_constraintBottom_toBottomOf="parent"
 				app:layout_constraintEnd_toEndOf="parent"
 				app:layout_constraintStart_toStartOf="parent"
 				app:layout_constraintTop_toTopOf="parent"
-				app:layout_constraintVertical_bias="0.3" />
+				app:layout_constraintVertical_bias="0.3"
+				tools:visibility="visible" />
 
 		</androidx.constraintlayout.widget.ConstraintLayout>
 
@@ -91,6 +91,7 @@
 		android:layout_marginEnd="16dp"
 		android:layout_marginBottom="16dp"
 		android:src="@drawable/ic_add"
+		android:tint="@color/black"
 		app:fabSize="normal"
 		app:layout_constraintBottom_toBottomOf="parent"
 		app:layout_constraintEnd_toEndOf="parent" />

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

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:id="@+id/background"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:layout_marginTop="1dp"
+	android:layout_marginBottom="1dp"
+	android:background="@color/red">
+
+	<androidx.appcompat.widget.AppCompatImageView
+		android:id="@+id/leftIcon"
+		android:layout_width="24dp"
+		android:layout_height="24dp"
+		android:layout_marginStart="16dp"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/ic_outline_delete" />
+
+	<androidx.appcompat.widget.AppCompatImageView
+		android:id="@+id/rightIcon"
+		android:layout_width="24dp"
+		android:layout_height="24dp"
+		android:layout_marginEnd="16dp"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/ic_outline_delete" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,11 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout 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"
 	android:id="@+id/container"
 	android:layout_width="match_parent"
-	android:layout_height="48dp"
+	android:layout_height="48dp">
-	android:background="?selectableItemBackground">
+
+	<include layout="@layout/layout_swipe_to_delete" />
+
+	<androidx.constraintlayout.widget.ConstraintLayout
+		android:id="@+id/foreground"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		android:background="@color/gray_dark"
+		android:foreground="?selectableItemBackground">
 
 		<androidx.appcompat.widget.AppCompatTextView
 			android:id="@+id/title"
@@ -34,4 +42,6 @@
 			android:orientation="vertical"
 			app:layout_constraintGuide_end="16dp" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+	</androidx.constraintlayout.widget.ConstraintLayout>
+
+</FrameLayout>