From eb25fda5f665067404778586f9eff8bf3155b167 Mon Sep 17 00:00:00 2001
From: tibbi <tibor@kaputa.sk>
Date: Mon, 15 Aug 2016 22:10:14 +0200
Subject: [PATCH] try implementing multiple choicemode on recyclerview

---
 app/build.gradle                              |  1 +
 .../applauncher/activities/MainActivity.kt    |  2 +-
 .../applauncher/adapters/RecyclerAdapter.kt   | 52 +++++++++++++++----
 3 files changed, 44 insertions(+), 11 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 9941648..e912204 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -30,6 +30,7 @@ dependencies {
     compile 'com.android.support:appcompat-v7:23.4.0'
     compile 'com.android.support:recyclerview-v7:23.4.0'
     compile 'com.android.support:design:23.4.0'
+    compile 'com.bignerdranch.android:recyclerview-multiselect:0.2'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt
index 96a03fe..e87afd6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt
@@ -54,7 +54,7 @@ class MainActivity : SimpleActivity(), AddAppDialog.AddLaunchersInterface {
 
     private fun setupLaunchers() {
         launchers = dbHelper.getLaunchers()
-        launchers_holder.adapter = RecyclerAdapter(applicationContext, launchers) {
+        launchers_holder.adapter = RecyclerAdapter(this, launchers) {
             val launchIntent = packageManager.getLaunchIntentForPackage(it.pkgName)
             if (launchIntent != null) {
                 startActivity(launchIntent)
diff --git a/app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/RecyclerAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/RecyclerAdapter.kt
index 1cb5b59..8bb9e43 100644
--- a/app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/RecyclerAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/RecyclerAdapter.kt
@@ -1,19 +1,44 @@
 package com.simplemobiletools.applauncher.adapters
 
-import android.content.Context
+import android.app.Activity
+import android.support.v7.app.AppCompatActivity
+import android.support.v7.view.ActionMode
 import android.support.v7.widget.RecyclerView
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
+import com.bignerdranch.android.multiselector.ModalMultiSelectorCallback
+import com.bignerdranch.android.multiselector.MultiSelector
+import com.bignerdranch.android.multiselector.SwappingHolder
 import com.simplemobiletools.applauncher.R
 import com.simplemobiletools.applauncher.models.AppLauncher
 import kotlinx.android.synthetic.main.app_launcher_dialog_item.view.*
 
-class RecyclerAdapter(val cxt: Context, val launchers: List<AppLauncher>, val itemClick: (AppLauncher) -> Unit) :
+class RecyclerAdapter(val act: Activity, val launchers: List<AppLauncher>, val itemClick: (AppLauncher) -> Unit) :
         RecyclerView.Adapter<RecyclerAdapter.ViewHolder>() {
 
+    val multiSelector = MultiSelector()
+
+    val deleteMode = object : ModalMultiSelectorCallback(multiSelector) {
+        override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
+            return false
+        }
+
+        override fun onCreateActionMode(actionMode: ActionMode?, menu: Menu?): Boolean {
+            super.onCreateActionMode(actionMode, menu)
+            act.menuInflater.inflate(R.menu.cab, menu)
+            return true
+        }
+    }
+
+    override fun onAttachedToRecyclerView(recyclerView: RecyclerView?) {
+        super.onAttachedToRecyclerView(recyclerView)
+        if (multiSelector.isSelectable) {
+            deleteMode.setClearOnPrepare(false)
+            (act as AppCompatActivity).startSupportActionMode(deleteMode)
+        }
+    }
+
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        holder.bindView(cxt, launchers[position])
+        holder.bindView(act, deleteMode, multiSelector, launchers[position])
     }
 
     override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): ViewHolder {
@@ -25,19 +50,26 @@ class RecyclerAdapter(val cxt: Context, val launchers: List<AppLauncher>, val it
         return launchers.count()
     }
 
-    class ViewHolder(view: View, val itemClick: (AppLauncher) -> (Unit)) : RecyclerView.ViewHolder(view) {
-        fun bindView(context: Context, launcher: AppLauncher) {
+    class ViewHolder(view: View, val itemClick: (AppLauncher) -> (Unit)) : SwappingHolder(view, MultiSelector()) {
+        val viewHolder = this
+        fun bindView(act: Activity, deleteMode: ModalMultiSelectorCallback, multiSelector: MultiSelector, launcher: AppLauncher) {
             with(launcher) {
                 itemView.launcher_label.text = launcher.name
                 itemView.setOnClickListener {
                     itemClick(this)
                 }
 
+                itemView.setOnLongClickListener {
+                    (act as AppCompatActivity).startSupportActionMode(deleteMode)
+                    multiSelector.setSelected(viewHolder, true)
+                    true
+                }
+
                 if (launcher.iconId != 0) {
-                    val icon = context.resources.getDrawable(launcher.iconId)
+                    val icon = act.resources.getDrawable(launcher.iconId)
                     itemView.launcher_icon.setImageDrawable(icon)
                 } else {
-                    val icon = context.packageManager.getApplicationIcon(launcher.pkgName)
+                    val icon = act.packageManager.getApplicationIcon(launcher.pkgName)
                     itemView.launcher_icon.setImageDrawable(icon)
                 }
             }