From 89e3d124f5382eeed7a7e593a9bf215a8f68d585 Mon Sep 17 00:00:00 2001
From: YOUNG HO CHA <ganadist@gmail.com>
Date: Sat, 5 Aug 2017 22:51:16 +0900
Subject: [PATCH]  #51 convert RecyclerViewEmptySupport

Signed-off-by: YOUNG HO CHA <ganadist@gmail.com>
---
 .../minimaltodo/RecyclerViewEmptySupport.java | 72 -------------------
 .../minimaltodo/RecyclerViewEmptySupport.kt   | 54 ++++++++++++++
 2 files changed, 54 insertions(+), 72 deletions(-)
 delete mode 100644 app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.java
 create mode 100644 app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.kt

diff --git a/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.java b/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.java
deleted file mode 100644
index 1b760a8..0000000
--- a/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.java
+++ /dev/null
@@ -1,72 +0,0 @@
-package com.example.avjindersinghsekhon.minimaltodo;
-
-import android.content.Context;
-import android.support.v7.widget.RecyclerView;
-import android.util.AttributeSet;
-import android.view.View;
-
-public class RecyclerViewEmptySupport extends RecyclerView {
-    private View emptyView;
-
-    private AdapterDataObserver observer = new AdapterDataObserver() {
-        @Override
-        public void onChanged() {
-            showEmptyView();
-        }
-
-        @Override
-        public void onItemRangeInserted(int positionStart, int itemCount) {
-            super.onItemRangeInserted(positionStart, itemCount);
-            showEmptyView();
-        }
-
-        @Override
-        public void onItemRangeRemoved(int positionStart, int itemCount) {
-            super.onItemRangeRemoved(positionStart, itemCount);
-            showEmptyView();
-        }
-    };
-
-
-
-    public RecyclerViewEmptySupport(Context context) {
-        super(context);
-    }
-
-    public void showEmptyView(){
-
-        Adapter<?> adapter = getAdapter();
-        if(adapter!=null && emptyView!=null){
-            if(adapter.getItemCount()==0){
-                emptyView.setVisibility(VISIBLE);
-                RecyclerViewEmptySupport.this.setVisibility(GONE);
-            }
-            else{
-                emptyView.setVisibility(GONE);
-                RecyclerViewEmptySupport.this.setVisibility(VISIBLE);
-            }
-        }
-
-    }
-
-    public RecyclerViewEmptySupport(Context context, AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    public RecyclerViewEmptySupport(Context context, AttributeSet attrs, int defStyle) {
-        super(context, attrs, defStyle);
-    }
-
-    @Override
-    public void setAdapter(Adapter adapter) {
-        super.setAdapter(adapter);
-        if(adapter!=null){
-            adapter.registerAdapterDataObserver(observer);
-            observer.onChanged();
-        }
-    }
-
-    public void setEmptyView(View v){
-        emptyView = v;
-    }
-}
diff --git a/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.kt b/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.kt
new file mode 100644
index 0000000..92b6c6a
--- /dev/null
+++ b/app/src/main/java/com/example/avjindersinghsekhon/minimaltodo/RecyclerViewEmptySupport.kt
@@ -0,0 +1,54 @@
+package com.example.avjindersinghsekhon.minimaltodo
+
+import android.content.Context
+import android.support.v7.widget.RecyclerView
+import android.util.AttributeSet
+import android.view.View
+
+class RecyclerViewEmptySupport @JvmOverloads constructor(
+        context: Context, attrs: AttributeSet? = null, defStyle: Int = 0):
+        RecyclerView(context, attrs, defStyle) {
+    private var emptyView: View? = null
+
+    private val observer = object : RecyclerView.AdapterDataObserver() {
+        override fun onChanged() {
+            showEmptyView()
+        }
+
+        override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
+            super.onItemRangeInserted(positionStart, itemCount)
+            onChanged()
+        }
+
+        override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+            super.onItemRangeRemoved(positionStart, itemCount)
+            onChanged()
+        }
+    }
+
+    fun showEmptyView() {
+        val adapter = adapter
+        if (adapter != null && emptyView != null) {
+            if (adapter.itemCount == 0) {
+                emptyView!!.visibility = View.VISIBLE
+                visibility = View.GONE
+            } else {
+                emptyView!!.visibility = View.GONE
+                visibility = View.VISIBLE
+            }
+        }
+    }
+
+    override fun setAdapter(adapter: RecyclerView.Adapter<*>?) {
+        super.setAdapter(adapter)
+        adapter?.run {
+            registerAdapterDataObserver(observer)
+            observer.onChanged()
+        }
+    }
+
+    fun setEmptyView(v: View?) {
+        emptyView = v
+        showEmptyView()
+    }
+}
\ No newline at end of file