[메인][New] 첫 카테고리 드래그 해야 위로 스크롤 됨

app/src/main/java/kr/co/zumo/app/lifeplus/view/screen/main/MainContentsCategoryHolder.java

@@ -134,22 +134,23 @@ public class MainContentsCategoryHolder extends MainContentsHolder {
       recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
         @Override
         public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
+
           int action = e.getAction();
           switch (action) {
-//            case MotionEvent.ACTION_MOVE:
-//            case MotionEvent.ACTION_DOWN:
             case MotionEvent.ACTION_UP:
               /**
                * 스크롤 시킬 조건
                * - 1번 카테고리가 화면에서 벗어나 있을 때, (아래 쪽이 잘렸을 때)
                */
-              if (true) {
-                listener.onEvent(new Event.Builder(Event.SCROLL).build());
+              if (DIRECTION_LEFT.equals(direction) || DIRECTION_RIGHT.equals(direction)) {
+                listener.onEvent(new Event.Builder(Event.SCROLL).index(index).build());
               }
               break;
             default:
               break;
           }
+
+          direction = getDirection(e);
           return false;
         }
 
@@ -169,6 +170,56 @@ public class MainContentsCategoryHolder extends MainContentsHolder {
     recyclerView.getLayoutManager().onRestoreInstanceState(state);
   }
 
+  int oldX;
+  int oldY;
+  String direction;
+
+  private static final String DIRECTION_NONE = "none";
+  private static final String DIRECTION_UP = "up";
+  private static final String DIRECTION_DOWN = "down";
+  private static final String DIRECTION_RIGHT = "right";
+  private static final String DIRECTION_LEFT = "left";
+
+  private String getDirection(MotionEvent e) {
+    String direction = DIRECTION_NONE;
+    int action = e.getAction();
+    switch (action) {
+      case MotionEvent.ACTION_DOWN:
+        oldX = (int) e.getX();
+        oldY = (int) e.getY();
+        break;
+      case MotionEvent.ACTION_MOVE:
+        int newX = (int) e.getX();
+        int newY = (int) e.getY();
+
+        int dx = oldX - newX;
+        int dy = oldY - newY;
+
+        // Use dx and dy to determine the direction of the move
+        if (Math.abs(dx) > Math.abs(dy)) {
+          if (dx > 0) {
+            direction = DIRECTION_RIGHT;
+          }
+          else {
+            direction = DIRECTION_LEFT;
+          }
+        }
+        else {
+          if (dy > 0) {
+            direction = DIRECTION_DOWN;
+          }
+          else {
+            direction = DIRECTION_UP;
+          }
+        }
+        break;
+      default:
+        // nothing
+        break;
+    }
+    return direction;
+  }
+
   @Override
   public void dispose() {
     if (null != adapter) {