From 34c427e13325b40d16609bd4256fea8cb08a9e21 Mon Sep 17 00:00:00 2001
From: Sparrow007 <ankit.steven007@gmail.com>
Date: Tue, 31 May 2022 01:18:21 +0530
Subject: [PATCH 1/5] fix notifyItemChanged, notifyItemRemoved

---
 .idea/compiler.xml                            |  2 +-
 .idea/misc.xml                                |  2 +-
 .../carousellayout/MainActivity.kt            |  9 ++++--
 .../carousellayout/adapter/DataAdapter.kt     | 13 ++++++--
 app/src/main/res/layout/activity_main.xml     | 13 ++++++--
 app/src/main/res/values/strings.xml           |  1 +
 .../CarouselLayoutManager.kt                  |  5 +--
 .../CarouselRecyclerview.kt                   | 32 ++++++++-----------
 8 files changed, 48 insertions(+), 29 deletions(-)

diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index fb7f4a8..61a9130 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="11" />
+    <bytecodeTargetLevel target="1.8" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index ccccd12..e17a734 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -7,7 +7,7 @@
       </map>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt b/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
index 1e265f7..b1446e8 100644
--- a/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
+++ b/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
@@ -22,7 +22,7 @@ class MainActivity : AppCompatActivity() {
         list.add(DataModel(R.drawable.hobes, "Thi is cool"))
         list.add(DataModel(R.drawable.guypro, "Thi is cool"))
         list.add(DataModel(R.drawable.joker, "Thi is cool"))
-        list.add(DataModel(R.drawable.londonlove, "Thi is cool"))
+       // list.add(DataModel(R.drawable.londonlove, "Thi is cool"))
 
         val adapter = DataAdapter(list)
 
@@ -30,9 +30,12 @@ class MainActivity : AppCompatActivity() {
             this.adapter = adapter
             set3DItem(true)
             setAlpha(true)
-            setInfinite(true)
         }
-        val carouselLayoutManager = binding.recycler.getCarouselLayoutManager()
+
+        binding.button.setOnClickListener {
+            adapter.removeData()
+        }
+
        // carouselLayoutManager.scrollToPosition(4)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
index 11a2ad5..809e5aa 100644
--- a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
+++ b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
@@ -9,7 +9,7 @@ import com.bumptech.glide.Glide
 import com.example.customviewimple.model.DataModel
 import com.jackandphantom.carousellayout.R
 
-class DataAdapter (private var list : List<DataModel>): RecyclerView.Adapter<DataAdapter.ViewHolder>() {
+class DataAdapter (private var list : ArrayList<DataModel>): RecyclerView.Adapter<DataAdapter.ViewHolder>() {
 
      class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
          val image : ImageView = itemView.findViewById(R.id.image)
@@ -28,8 +28,17 @@ class DataAdapter (private var list : List<DataModel>): RecyclerView.Adapter<Dat
         Glide.with(holder.image).load(list.get(position).img).into(holder.image)
     }
 
-    fun updateData(list: List<DataModel>) {
+    fun updateData(list: ArrayList<DataModel>) {
         this.list = list
         notifyDataSetChanged()
     }
+
+    fun removeData() {
+        // remove last item for test purposes
+        val orgListSize = list.size
+        this.list[0] = (DataModel(R.drawable.londonlove, "Thi is cool"))
+        notifyItemChanged(0)
+                // this.list = this.list.subList(0, orgListSize - 1).toList()
+
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index d90afc3..250f78e 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,14 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout 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:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
     tools:context=".MainActivity">
 
     <com.jackandphantom.carouselrecyclerview.CarouselRecyclerview
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_gravity="center"
         android:id="@+id/recycler"/>
 
-</FrameLayout>
\ No newline at end of file
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="50dp"
+        android:text="@string/removeitem" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 108510b..f5a0fa0 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">CarouselLayout</string>
+    <string name="removeitem">removeItem</string>
 </resources>
\ No newline at end of file
diff --git a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt
index 512b0ef..f8b6ec3 100644
--- a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt
+++ b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselLayoutManager.kt
@@ -464,8 +464,9 @@ class CarouselLayoutManager constructor(
      * It's also used in the [CarouselRecyclerview.getChildDrawingOrder] for measure the order of the child
      */
     fun getChildActualPos(index: Int): Int {
-        val child = getChildAt(index)
-        if (child!!.tag != null) {
+        val child = getChildAt(index) ?: return Int.MIN_VALUE
+
+        if (child.tag != null) {
             val tag = checkTAG(child.tag)
             if (tag != null)
             return tag.pos
diff --git a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
index f8bef66..30fc240 100644
--- a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
+++ b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
@@ -84,7 +84,7 @@ class CarouselRecyclerview(context: Context, attributeSet: AttributeSet) : Recyc
 
     /**
      * Get the layout manager instance
-     * @return CoverLayout
+     * @return carouselLayoutManager
      */
      fun getCarouselLayoutManager(): CarouselLayoutManager {
         return layoutManager as CarouselLayoutManager
@@ -100,25 +100,22 @@ class CarouselRecyclerview(context: Context, attributeSet: AttributeSet) : Recyc
     override fun getChildDrawingOrder(childCount: Int, i: Int): Int {
         val center: Int = getCarouselLayoutManager().centerPosition()
 
-        // Get the actual position of the i-th child view in RecyclerView
-
         // Get the actual position of the i-th child view in RecyclerView
         val actualPos: Int = getCarouselLayoutManager().getChildActualPos(i)
+        var order: Int = i
 
         // The number of intervals from the middle item
-
-        // The number of intervals from the middle item
-        val dist = actualPos - center
-
-        var order: Int
-        // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order
-        // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order
-        order = if (dist < 0) {
-            i
-        } else {
-            //[>= 0] It means that the item is located to the right
-            // of the middle item, and the order needs to be reversed.
-            childCount - 1 - dist
+        if (actualPos != Int.MIN_VALUE) {
+            val dist = actualPos - center
+            // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order
+            // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order
+            order = if (dist < 0) {
+                i
+            } else {
+                //[>= 0] It means that the item is located to the right
+                // of the middle item, and the order needs to be reversed.
+                childCount - 1 - dist
+            }
         }
 
         if (order < 0) order = 0 else if (order > childCount - 1) order = childCount - 1
@@ -126,6 +123,7 @@ class CarouselRecyclerview(context: Context, attributeSet: AttributeSet) : Recyc
         return order
     }
 
+
     fun setItemSelectListener(listener: CarouselLayoutManager.OnSelected) {
         getCarouselLayoutManager().setOnSelectedListener(listener)
     }
@@ -163,7 +161,5 @@ class CarouselRecyclerview(context: Context, attributeSet: AttributeSet) : Recyc
     override fun setAdapter(adapter: Adapter<*>?) {
         super.setAdapter(adapter)
         restorePosition()
-
     }
-
 }

From d6b59dd038f391dfa7d7d44d8092aa7f9b3df5f0 Mon Sep 17 00:00:00 2001
From: Sparrow007 <ankit.steven007@gmail.com>
Date: Tue, 31 May 2022 01:24:24 +0530
Subject: [PATCH 2/5] add multiple method for itemChanged and itemRemoved

---
 .../carousellayout/adapter/DataAdapter.kt            | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
index 809e5aa..be92174 100644
--- a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
+++ b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
@@ -33,12 +33,18 @@ class DataAdapter (private var list : ArrayList<DataModel>): RecyclerView.Adapte
         notifyDataSetChanged()
     }
 
-    fun removeData() {
+    fun itemChanged() {
         // remove last item for test purposes
-        val orgListSize = list.size
         this.list[0] = (DataModel(R.drawable.londonlove, "Thi is cool"))
         notifyItemChanged(0)
-                // this.list = this.list.subList(0, orgListSize - 1).toList()
 
     }
+
+    //Use the method for checking the itemRemoved
+    fun removeData() {
+        // remove last item for test purposes
+        val orgListSize = list.size
+        this.list = this.list.subList(0, orgListSize - 1).toList() as ArrayList<DataModel>
+        notifyItemRemoved(orgListSize - 1)
+    }
 }
\ No newline at end of file

From 5352d7da22c15edcfcf5a08aeea8674f1f045ba1 Mon Sep 17 00:00:00 2001
From: Sparrow007 <ankit.steven007@gmail.com>
Date: Tue, 31 May 2022 01:25:13 +0530
Subject: [PATCH 3/5] add comment for better understanding

---
 .../com/jackandphantom/carousellayout/adapter/DataAdapter.kt     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
index be92174..32b0bd2 100644
--- a/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
+++ b/app/src/main/java/com/jackandphantom/carousellayout/adapter/DataAdapter.kt
@@ -33,6 +33,7 @@ class DataAdapter (private var list : ArrayList<DataModel>): RecyclerView.Adapte
         notifyDataSetChanged()
     }
 
+    //Use the method for item changed
     fun itemChanged() {
         // remove last item for test purposes
         this.list[0] = (DataModel(R.drawable.londonlove, "Thi is cool"))

From 9c01a41f38b06d987062a5cca3c5b7d8d10a8470 Mon Sep 17 00:00:00 2001
From: Sparrow007 <ankit.steven007@gmail.com>
Date: Tue, 31 May 2022 01:26:15 +0530
Subject: [PATCH 4/5] add comment for better understanding

---
 .../java/com/jackandphantom/carousellayout/MainActivity.kt     | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt b/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
index b1446e8..218d4ac 100644
--- a/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
+++ b/app/src/main/java/com/jackandphantom/carousellayout/MainActivity.kt
@@ -32,10 +32,9 @@ class MainActivity : AppCompatActivity() {
             setAlpha(true)
         }
 
+        //Trigger the button and put your useCase to test different cases of adapter
         binding.button.setOnClickListener {
             adapter.removeData()
         }
-
-       // carouselLayoutManager.scrollToPosition(4)
     }
 }
\ No newline at end of file

From 246dbb96a0a2354dd5d760cc538dd49ef832175a Mon Sep 17 00:00:00 2001
From: Sparrow007 <ankit.steven007@gmail.com>
Date: Tue, 31 May 2022 01:30:59 +0530
Subject: [PATCH 5/5] upate the carouselRecyclerview

---
 .../carouselrecyclerview/CarouselRecyclerview.kt               | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
index 30fc240..87c23e2 100644
--- a/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
+++ b/carouselrecyclerview/src/main/java/com/jackandphantom/carouselrecyclerview/CarouselRecyclerview.kt
@@ -104,8 +104,9 @@ class CarouselRecyclerview(context: Context, attributeSet: AttributeSet) : Recyc
         val actualPos: Int = getCarouselLayoutManager().getChildActualPos(i)
         var order: Int = i
 
-        // The number of intervals from the middle item
         if (actualPos != Int.MIN_VALUE) {
+
+            // The number of intervals from the middle item
             val dist = actualPos - center
             // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order
             // [< 0] indicates that the item is located to the left of the middle item and can be drawn in order