From 5783066e38f96bf91d8c9751e1d9bd0d7b670036 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Sch=C3=A4ttgen?= <michael@schattgen.me>
Date: Sun, 21 Aug 2016 22:54:27 +0200
Subject: [PATCH] Added Drag and Drop support

---
 app/build.gradle                              |  1 +
 .../java/me/impy/aegis/KeyProfileAdapter.java | 27 ++++++++++++++++++-
 .../main/java/me/impy/aegis/MainActivity.java | 11 ++++++--
 3 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index 8a94f5fc..90c9e36a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,6 +23,7 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile 'com.android.support:appcompat-v7:24.1.1'
+    compile 'com.github.nisrulz:recyclerviewhelper:24.1.1'
     compile 'com.android.support:design:24.1.1'
     compile 'com.amulyakhare:com.amulyakhare.textdrawable:1.0.1'
     compile 'me.dm7.barcodescanner:zxing:1.9'
diff --git a/app/src/main/java/me/impy/aegis/KeyProfileAdapter.java b/app/src/main/java/me/impy/aegis/KeyProfileAdapter.java
index 9b0f032d..8c80a67d 100644
--- a/app/src/main/java/me/impy/aegis/KeyProfileAdapter.java
+++ b/app/src/main/java/me/impy/aegis/KeyProfileAdapter.java
@@ -17,15 +17,17 @@ import com.amulyakhare.textdrawable.util.ColorGenerator;
 
 import java.security.Key;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Random;
 import java.util.Timer;
 import java.util.TimerTask;
 
+import github.nisrulz.recyclerviewhelper.RVHAdapter;
 import me.impy.aegis.crypto.OTP;
 import me.impy.aegis.helpers.ItemClickListener;
 
-public class KeyProfileAdapter extends RecyclerView.Adapter<KeyProfileAdapter.KeyProfileHolder> {
+public class KeyProfileAdapter extends RecyclerView.Adapter<KeyProfileAdapter.KeyProfileHolder> implements RVHAdapter {
     private ArrayList<KeyProfile> mKeyProfiles;
     private final List<KeyProfileHolder> lstHolders;
     private final ItemClickListener itemClickListener;
@@ -43,6 +45,29 @@ public class KeyProfileAdapter extends RecyclerView.Adapter<KeyProfileAdapter.Ke
         }
     };
 
+    @Override
+    public boolean onItemMove(int fromPosition, int toPosition) {
+        swap(fromPosition, toPosition);
+        return false;
+    }
+
+    @Override
+    public void onItemDismiss(int position, int direction) {
+        remove(position);
+    }
+
+
+    // Helper functions you might want to implement to make changes in the list as an event is fired
+    private void remove(int position) {
+        mKeyProfiles.remove(position);
+        notifyItemRemoved(position);
+    }
+
+    private void swap(int firstPosition, int secondPosition) {
+        Collections.swap(mKeyProfiles, firstPosition, secondPosition);
+        notifyItemMoved(firstPosition, secondPosition);
+    }
+
     public static class KeyProfileHolder extends RecyclerView.ViewHolder {
         TextView profileName;
         TextView profileCode;
diff --git a/app/src/main/java/me/impy/aegis/MainActivity.java b/app/src/main/java/me/impy/aegis/MainActivity.java
index 8caa318b..1fc4f403 100644
--- a/app/src/main/java/me/impy/aegis/MainActivity.java
+++ b/app/src/main/java/me/impy/aegis/MainActivity.java
@@ -14,6 +14,7 @@ import android.os.Bundle;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
+import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -26,6 +27,8 @@ import com.yarolegovich.lovelydialog.LovelyTextInputDialog;
 
 import java.util.ArrayList;
 
+import github.nisrulz.recyclerviewhelper.RVHItemDividerDecoration;
+import github.nisrulz.recyclerviewhelper.RVHItemTouchHelperCallback;
 import me.impy.aegis.crypto.KeyInfo;
 import me.impy.aegis.crypto.OTP;
 import me.impy.aegis.helpers.DividerItemDecoration;
@@ -62,8 +65,6 @@ public class MainActivity extends AppCompatActivity  {
         LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
         rvKeyProfiles.setLayoutManager(mLayoutManager);
 
-        rvKeyProfiles.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
-
         final Context context = this.getApplicationContext();
         ItemClickListener itemClickListener = new ItemClickListener() {
             @Override
@@ -77,6 +78,12 @@ public class MainActivity extends AppCompatActivity  {
         };
 
         mKeyProfileAdapter = new KeyProfileAdapter(mKeyProfiles, itemClickListener);
+        rvKeyProfiles.addItemDecoration(new RVHItemDividerDecoration(this, LinearLayoutManager.VERTICAL));
+
+        ItemTouchHelper.Callback callback = new RVHItemTouchHelperCallback(mKeyProfileAdapter, true, false, false);
+        ItemTouchHelper helper = new ItemTouchHelper(callback);
+        helper.attachToRecyclerView(rvKeyProfiles);
+
         rvKeyProfiles.setAdapter(mKeyProfileAdapter);
     }