ProteusGridLayoutManager and ViewPager Example implemented

build.gradle

@@ -22,6 +22,8 @@ buildscript {
         google()
         mavenCentral()
         jcenter()
+        maven { url "https://jitpack.io" }
+
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.5.3'

data/layout.json

@@ -130,6 +130,14 @@
           "padding": "16dp",
           "paddingBottom": "0dp"
         },
+
+        {
+          "type": "include",
+          "layout": "ViewPagerExample",
+          "padding": "16dp",
+          "paddingBottom": "0dp"
+        },
+
         {
           "type": "include",
           "layout": "SimpleDataBindingExample",

data/layouts.json

@@ -253,7 +253,7 @@
           "items": "@{data.achievements}"
         },
         "layout_manager": {
-          "type": "LinearLayoutManager"
+          "type": "GridLayoutManager"
         },
         "adapter": {
           "@": {
@@ -270,13 +270,61 @@
               "gravity": "center",
               "text": "@{item}",
               "textSize": "14sp",
-              "textColor": "#323232"
+              "textColor": "#323232",
+              "onClick":"@{item}"
             }
           }
         }
       }
     ]
   },
+
+  "ViewPagerExample": {
+    "type": "FrameLayout",
+    "layout_width": "match_parent",
+    "layout_height": "wrap_content",
+    "padding": "16dp",
+    "paddingBottom": "0dp",
+    "children": [
+      {
+        "type": "RecyclerView",
+        "id" : "rc_view",
+        "layout_width": "match_parent",
+        "layout_height": "148dp",
+        "background": "#ffffff",
+        "data": {
+          "items": "@{data.achievements}"
+        },
+        "layout_manager": {
+          "type": "GridLayoutManager",
+          "orientation" : 1,
+          "numCols" : 2
+        },
+        "adapter": {
+          "@": {
+            "type": "SimpleListAdapter",
+            "item-count": "@{items.$length}",
+            "item-layout": {
+              "type": "TextView",
+              "data": {
+                "item": "@{items[$index]}"
+              },
+              "layout_width": "match_parent",
+              "layout_height": "match_parent",
+              "padding": "12dp",
+              "layout_marginBottom": "4dp",
+              "gravity": "center",
+              "text": "@{item}",
+              "textSize": "44sp",
+              "textColor": "#323232",
+              "onClick":"@{item}"
+            }
+          }
+        }
+      }
+    ]
+  },
+
   "AlertDialogLayout": {
     "type": "LinearLayout",
     "orientation": "vertical",

data/user.json

@@ -1,6 +1,6 @@
 {
   "0": {
-    "name": "John Doe",
+    "name": "Ravi Ranjan",
     "location": {
       "country": "India",
       "city": "Bengaluru",

demo/src/main/java/com/flipkart/android/proteus/demo/ProteusActivity.java

@@ -48,6 +48,9 @@
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.content.ContextCompat;
+import androidx.recyclerview.widget.LinearSnapHelper;
+import androidx.recyclerview.widget.RecyclerView;
 
 public class ProteusActivity extends AppCompatActivity implements ProteusManager.Listener {
 
@@ -216,6 +219,44 @@ void render() {
 
     // Add the inflated view to the container
     container.addView(view.getAsView());
+
+
+
+    LinearSnapHelper snapHelper = new LinearSnapHelper() {
+      @Override
+      public int findTargetSnapPosition(RecyclerView.LayoutManager layoutManager, int velocityX, int velocityY) {
+        View centerView = findSnapView(layoutManager);
+        if (centerView == null)
+          return RecyclerView.NO_POSITION;
+
+        int position = layoutManager.getPosition(centerView);
+        int targetPosition = -1;
+        if (layoutManager.canScrollHorizontally()) {
+          if (velocityX < 0) {
+            targetPosition = position - 1;
+          } else {
+            targetPosition = position + 1;
+          }
+        }
+
+        if (layoutManager.canScrollVertically()) {
+          if (velocityY < 0) {
+            targetPosition = position - 1;
+          } else {
+            targetPosition = position + 1;
+          }
+        }
+
+        final int firstItem = 0;
+        final int lastItem = layoutManager.getItemCount() - 1;
+        targetPosition = Math.min(lastItem, Math.max(targetPosition, firstItem));
+        return targetPosition;
+      }
+    };
+
+    View recyclerView = view.getViewManager().findViewById("rc_view");
+    snapHelper.attachToRecyclerView((RecyclerView) recyclerView);
+
   }
 
   void reload() {

recyclerview-v7/src/main/java/com/flipkart/android/proteus/support/v7/RecyclerViewModule.java

@@ -22,6 +22,7 @@
 import com.flipkart.android.proteus.support.v7.adapter.SimpleListAdapter;
 import com.flipkart.android.proteus.support.v7.layoutmanager.LayoutManagerBuilder;
 import com.flipkart.android.proteus.support.v7.layoutmanager.LayoutManagerFactory;
+import com.flipkart.android.proteus.support.v7.layoutmanager.ProteusGridLayoutManager;
 import com.flipkart.android.proteus.support.v7.layoutmanager.ProteusLinearLayoutManager;
 import com.flipkart.android.proteus.support.v7.widget.RecyclerViewParser;
 
@@ -42,6 +43,8 @@ public class RecyclerViewModule implements ProteusBuilder.Module {
   static final String ADAPTER_SIMPLE_LIST = "SimpleListAdapter";
 
   static final String LAYOUT_MANAGER_LINEAR = "LinearLayoutManager";
+  static final String LAYOUT_MANAGER_GRID = "GridLayoutManager";
+
 
   @NonNull
   private final RecyclerViewAdapterFactory adapterFactory;
@@ -175,7 +178,7 @@ public RecyclerViewModule build() {
       }
 
       if (includeDefaultLayoutManagers) {
-        registerDefaultLayoutManagers();
+        registerGridLayoutManagers();
       }
 
       return new RecyclerViewModule(adapterFactory, layoutManagerFactory);
@@ -188,5 +191,9 @@ private void registerDefaultAdapters() {
     private void registerDefaultLayoutManagers() {
       register(LAYOUT_MANAGER_LINEAR, ProteusLinearLayoutManager.BUILDER);
     }
+
+    private void registerGridLayoutManagers() {
+      register(LAYOUT_MANAGER_GRID, ProteusGridLayoutManager.BUILDER);
+    }
   }
 }

recyclerview-v7/src/main/java/com/flipkart/android/proteus/support/v7/layoutmanager/ProteusGridLayoutManager.java

@@ -0,0 +1,46 @@
+package com.flipkart.android.proteus.support.v7.layoutmanager;
+
+import android.content.Context;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.GridLayoutManager;
+
+import com.flipkart.android.proteus.support.v7.widget.ProteusRecyclerView;
+import com.flipkart.android.proteus.value.ObjectValue;
+
+public class ProteusGridLayoutManager extends GridLayoutManager {
+
+
+    private static final String ATTRIBUTE_COL = "numCols";
+    private static final String ATTRIBUTE_ORIENTATION = "orientation";
+    private static final String ATTRIBUTE_REVERSE_LAYOUT = "reverse";
+
+
+    public static final LayoutManagerBuilder<ProteusGridLayoutManager> BUILDER = new LayoutManagerBuilder<ProteusGridLayoutManager>() {
+
+        @NonNull
+        @Override
+        public ProteusGridLayoutManager create(@NonNull ProteusRecyclerView view, @NonNull ObjectValue config) {
+
+             int orientation = config.getAsInteger(ATTRIBUTE_ORIENTATION, GridLayoutManager.VERTICAL);
+             boolean reverseLayout = config.getAsBoolean(ATTRIBUTE_REVERSE_LAYOUT, false);
+
+            int col = config.getAsInteger(ATTRIBUTE_COL, 1);
+
+
+
+            return new ProteusGridLayoutManager(view.getContext(), col, orientation, reverseLayout);
+        }
+    };
+
+
+    public ProteusGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {
+        super(context, spanCount, orientation, reverseLayout);
+    }
+
+
+
+
+
+}