WIP

res/layout/activity_home.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@drawable/default_session_background">

res/values/colors.xml

@@ -4,6 +4,7 @@
     <!-- Session -->
     <color name="accent">#00F782</color>
     <color name="text">#FFFFFF</color>
+    <color name="destructive">#FF453A</color>
     <color name="unimportant">#D8D8D8</color>
     <color name="border">#979797</color>
     <color name="cell_background">#1B1B1B</color>

src/org/thoughtcrime/securesms/loki/redesign/activities/DisplayNameActivity.kt

@@ -8,7 +8,6 @@ import kotlinx.android.synthetic.main.activity_display_name_v2.*
 import network.loki.messenger.R
 import org.thoughtcrime.securesms.ApplicationContext
 import org.thoughtcrime.securesms.BaseActionBarActivity
-import org.thoughtcrime.securesms.ConversationListActivity
 import org.thoughtcrime.securesms.database.DatabaseFactory
 import org.thoughtcrime.securesms.loki.redesign.utilities.push
 import org.thoughtcrime.securesms.loki.redesign.utilities.setUpActionBarSessionLogo
@@ -54,7 +53,7 @@ class DisplayNameActivity : BaseActionBarActivity() {
             val servers = DatabaseFactory.getLokiThreadDatabase(this).getAllPublicChatServers()
             servers.forEach { publicChatAPI.setDisplayName(displayName, it) }
         }
-        val intent = Intent(this, ConversationListActivity::class.java)
+        val intent = Intent(this, HomeActivity::class.java)
         intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
         push(intent)
     }

src/org/thoughtcrime/securesms/loki/redesign/activities/HomeActivity.kt

@@ -1,12 +1,19 @@
 package org.thoughtcrime.securesms.loki.redesign.activities
 
+import android.annotation.SuppressLint
 import android.arch.lifecycle.Observer
+import android.content.Context
 import android.content.Intent
 import android.database.Cursor
+import android.graphics.BitmapFactory
+import android.graphics.Canvas
+import android.graphics.Paint
 import android.os.Bundle
 import android.support.v4.app.LoaderManager
 import android.support.v4.content.Loader
 import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
+import android.support.v7.widget.helper.ItemTouchHelper
 import android.view.Menu
 import android.view.MenuItem
 import kotlinx.android.synthetic.main.activity_home.*
@@ -16,11 +23,13 @@ import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
 import org.thoughtcrime.securesms.conversation.ConversationActivity
 import org.thoughtcrime.securesms.database.DatabaseFactory
 import org.thoughtcrime.securesms.database.model.ThreadRecord
+import org.thoughtcrime.securesms.loki.getColorWithID
 import org.thoughtcrime.securesms.loki.redesign.utilities.push
 import org.thoughtcrime.securesms.loki.redesign.views.ConversationView
 import org.thoughtcrime.securesms.mms.GlideApp
 import org.thoughtcrime.securesms.mms.GlideRequests
 import org.thoughtcrime.securesms.util.TextSecurePreferences
+import kotlin.math.abs
 
 class HomeActivity : PassphraseRequiredActionBarActivity, ConversationClickListener {
     private lateinit var glide: GlideRequests
@@ -43,6 +52,7 @@ class HomeActivity : PassphraseRequiredActionBarActivity, ConversationClickListe
         homeAdapter.conversationClickListener = this
         recyclerView.adapter = homeAdapter
         recyclerView.layoutManager = LinearLayoutManager(this)
+        ItemTouchHelper(SwipeCallback(this)).attachToRecyclerView(recyclerView)
         // This is a workaround for the fact that CursorRecyclerViewAdapter doesn't actually auto-update (even though it says it will)
         LoaderManager.getInstance(this).restartLoader(0, null, object : LoaderManager.LoaderCallbacks<Cursor> {
 
@@ -120,5 +130,38 @@ class HomeActivity : PassphraseRequiredActionBarActivity, ConversationClickListe
         val intent = Intent(this, JoinPublicChatActivity::class.java)
         startActivity(intent)
     }
+
+    private class SwipeCallback(val context: Context) : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
+
+        override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
+            return false
+        }
+
+        @SuppressLint("StaticFieldLeak")
+        override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
+            // TODO: Implement
+        }
+
+        override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dx: Float, dy: Float, actionState: Int, isCurrentlyActive: Boolean) {
+            if (actionState != ItemTouchHelper.ACTION_STATE_SWIPE) {
+                super.onChildDraw(c, recyclerView, viewHolder, dx, dy, actionState, isCurrentlyActive)
+            } else {
+                val itemView = viewHolder.itemView
+                val alpha = 1.0f - abs(dx) / viewHolder.itemView.width.toFloat()
+                if (dx < 0) {
+                    val backgroundPaint = Paint()
+                    backgroundPaint.color = context.resources.getColorWithID(R.color.destructive, context.theme)
+                    c.drawRect(itemView.right.toFloat() - abs(dx), itemView.top.toFloat(), itemView.right.toFloat(), itemView.bottom.toFloat(), backgroundPaint)
+                    val icon = BitmapFactory.decodeResource(context.resources, R.drawable.ic_trash_filled_32)
+                    val iconPaint = Paint()
+                    val left = itemView.right.toFloat() - abs(dx) + context.resources.getDimension(R.dimen.medium_spacing)
+                    val top = itemView.top.toFloat() + (itemView.bottom.toFloat() - itemView.top.toFloat() - icon.height) / 2
+                    c.drawBitmap(icon, left, top, iconPaint)
+                }
+                viewHolder.itemView.alpha = alpha
+                viewHolder.itemView.translationX = dx
+            }
+        }
+    }
     // endregion
 }

src/org/thoughtcrime/securesms/loki/redesign/fragments/ScanQRCodeFragmentV2.kt

@@ -33,16 +33,10 @@ class ScanQRCodeFragmentV2 : Fragment() {
 
     override fun onResume() {
         super.onResume()
-        scanningThread.setScanListener(scanListener)
         cameraView.onResume()
         cameraView.setPreviewCallback(scanningThread)
         scanningThread.start()
-    }
-
-    override fun onPause() {
-        super.onPause()
-        this.cameraView.onPause()
-        this.scanningThread.stopScanning()
+        scanningThread.setScanListener(scanListener)
     }
 
     override fun onConfigurationChanged(newConfiguration: Configuration) {
@@ -55,4 +49,10 @@ class ScanQRCodeFragmentV2 : Fragment() {
         cameraView.onResume()
         cameraView.setPreviewCallback(scanningThread)
     }
+
+    override fun onPause() {
+        super.onPause()
+        this.cameraView.onPause()
+        this.scanningThread.stopScanning()
+    }
 }