From 40a401c0d2be2e2e9e24f5a39991090ec4baf39d Mon Sep 17 00:00:00 2001
From: Mike Penz <mikepenz@gmail.com>
Date: Mon, 6 Jun 2016 19:18:15 +0200
Subject: [PATCH] * allow to define the stateManagement of the FastAdapter via
 the MaterialDrawer

---
 .../java/com/mikepenz/materialdrawer/Drawer.java |  2 +-
 .../mikepenz/materialdrawer/DrawerBuilder.java   | 16 +++++++++++++++-
 .../com/mikepenz/materialdrawer/MiniDrawer.java  | 16 ++++++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/library/src/main/java/com/mikepenz/materialdrawer/Drawer.java b/library/src/main/java/com/mikepenz/materialdrawer/Drawer.java
index c3ecdf6ae..913cf9874 100644
--- a/library/src/main/java/com/mikepenz/materialdrawer/Drawer.java
+++ b/library/src/main/java/com/mikepenz/materialdrawer/Drawer.java
@@ -179,7 +179,7 @@ public Materialize getMaterialize() {
      */
     public MiniDrawer getMiniDrawer() {
         if (mDrawerBuilder.mMiniDrawer == null) {
-            mDrawerBuilder.mMiniDrawer = new MiniDrawer().withDrawer(this).withAccountHeader(mDrawerBuilder.mAccountHeader);
+            mDrawerBuilder.mMiniDrawer = new MiniDrawer().withDrawer(this).withAccountHeader(mDrawerBuilder.mAccountHeader).withPositionBasedStateManagement(mDrawerBuilder.mPositionBasedStateManagement);
         }
         return mDrawerBuilder.mMiniDrawer;
     }
diff --git a/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java b/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java
index b04e205c6..8b92c9bcd 100644
--- a/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java
+++ b/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java
@@ -863,11 +863,24 @@ public DrawerBuilder withHasStableIds(boolean hasStableIds) {
     }
 
     // an adapter to use for the list
+    protected boolean mPositionBasedStateManagement = true;
     protected FastAdapter<IDrawerItem> mAdapter;
     protected HeaderAdapter<IDrawerItem> mHeaderAdapter = new HeaderAdapter<>();
     protected ItemAdapter<IDrawerItem> mItemAdapter = new ItemAdapter<>();
     protected FooterAdapter<IDrawerItem> mFooterAdapter = new FooterAdapter<>();
 
+    /**
+     * This allows to disable the default position based statemanagment of the FastAdapter and switch to the
+     * new identifier based state managment
+     *
+     * @param positionBasedStateManagement enable / disable the positionBasedStateManagement
+     * @return this
+     */
+    public DrawerBuilder withPositionBasedStateManagement(boolean positionBasedStateManagement) {
+        this.mPositionBasedStateManagement = positionBasedStateManagement;
+        return this;
+    }
+
     /**
      * Define a custom Adapter which will be used in the drawer
      * NOTE: this is not recommender
@@ -894,6 +907,7 @@ protected FastAdapter<IDrawerItem> getAdapter() {
             mAdapter.withSelectable(true);
             mAdapter.withAllowDeselection(false);
             mAdapter.setHasStableIds(mHasStableIds);
+            mAdapter.withPositionBasedStateManagement(mPositionBasedStateManagement);
 
             //we wrap our main Adapter with the item hosting adapter
             mHeaderAdapter.wrap(mItemAdapter.wrap(mFooterAdapter.wrap(mAdapter)));
@@ -1485,7 +1499,7 @@ public Drawer buildView() {
         //we only want to hook a Drawer to the MiniDrawer if it is the main drawer, not the appended one
         if (!mAppended && mGenerateMiniDrawer) {
             // if we should create a MiniDrawer we have to do this now
-            mMiniDrawer = new MiniDrawer().withDrawer(result).withAccountHeader(mAccountHeader);
+            mMiniDrawer = new MiniDrawer().withDrawer(result).withAccountHeader(mAccountHeader).withPositionBasedStateManagement(mPositionBasedStateManagement);
         }
 
         //forget the reference to the activity
diff --git a/library/src/main/java/com/mikepenz/materialdrawer/MiniDrawer.java b/library/src/main/java/com/mikepenz/materialdrawer/MiniDrawer.java
index 0606ea0e9..cb979df0c 100644
--- a/library/src/main/java/com/mikepenz/materialdrawer/MiniDrawer.java
+++ b/library/src/main/java/com/mikepenz/materialdrawer/MiniDrawer.java
@@ -103,6 +103,21 @@ public MiniDrawer withInRTL(boolean inRTL) {
         return this;
     }
 
+
+    protected boolean mPositionBasedStateManagement = true;
+
+    /**
+     * This allows to disable the default position based statemanagment of the FastAdapter and switch to the
+     * new identifier based state managment
+     *
+     * @param positionBasedStateManagement enable / disable the positionBasedStateManagement
+     * @return this
+     */
+    public MiniDrawer withPositionBasedStateManagement(boolean positionBasedStateManagement) {
+        this.mPositionBasedStateManagement = positionBasedStateManagement;
+        return this;
+    }
+
     private boolean mIncludeSecondaryDrawerItems = false;
 
     /**
@@ -298,6 +313,7 @@ public View build(Context ctx) {
         mAdapter = new FastItemAdapter<>();
         mAdapter.withSelectable(true);
         mAdapter.withAllowDeselection(false);
+        mAdapter.withPositionBasedStateManagement(mPositionBasedStateManagement);
         mRecyclerView.setAdapter(mAdapter);
 
         //if the activity with the drawer should be fullscreen add the padding for the statusbar