Adding Long Click functionality

README.md

@@ -36,6 +36,7 @@ Usage
         android:id="@+id/carouselView"
         android:layout_width="match_parent"
         android:layout_height="200dp"
+		android:longClickable="true"
         app:fillColor="#FFFFFFFF"
         app:pageColor="#00000000"
         app:radius="6dp"
@@ -111,6 +112,11 @@ customCarouselView.setImageClickListener(new ImageClickListener() {
             @Override
             public void onClick(int position) {
                 Toast.makeText(SampleCarouselViewActivity.this, "Clicked item: "+ position, Toast.LENGTH_SHORT).show();
+            }
+
+			@Override
+            public void onLongClick(int position) {
+                Toast.makeText(SampleCarouselViewActivity.this, "Long clicked item: "+ position, Toast.LENGTH_SHORT).show();
             }
         });
 ```

carouselview/src/main/java/com/synnapps/carouselview/CarouselViewPager.java

@@ -1,20 +1,27 @@
 package com.synnapps.carouselview;
 
 import android.content.Context;
+import android.os.Handler;
 import android.support.v4.view.ViewPager;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
+import android.view.ViewConfiguration;
 import android.view.animation.Interpolator;
 
 import java.lang.reflect.Field;
 
 /**
  * Created by Sayyam on 3/28/16.
+ *
+ * Edited by sqljim on 4/14/19
  */
 public class CarouselViewPager extends ViewPager {
 
     private ImageClickListener imageClickListener;
-    private float oldX = 0, newX = 0, sens = 5;
+    private float oldX = 0, newX = 0, oldY = 0, newY = 0, sens = 5;
+    private boolean longClick;
+
+
 
     public void setImageClickListener(ImageClickListener imageClickListener) {
         this.imageClickListener = imageClickListener;
@@ -58,23 +65,49 @@ public void setTransitionVelocity(int scrollFactor) {
         mScroller.setmScrollDuration(scrollFactor);
     }
 
+    final Handler handler = new Handler();
+
+    Runnable mlongClicked = new Runnable() {
+        public void run() {
+            longClick = true;
+        }
+    };
+
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
         switch (ev.getAction()) {
             case MotionEvent.ACTION_DOWN:
                 oldX = ev.getX();
+                oldY = ev.getY();
+
+                //This is where we start a timer, when the timer runs out the longClick boolean
+                //is set to true, signifying a long press has occurred.
+                longClick = false;
+                handler.postDelayed(mlongClicked, ViewConfiguration.getLongPressTimeout());
                 break;
 
+            //The below detects whether a click/longClick has occurred
+            //or whether a line has been drawn
             case MotionEvent.ACTION_UP:
                 newX = ev.getX();
-                if (Math.abs(oldX - newX) < sens) {
+                newY = ev.getY();
+
+                handler.removeCallbacks(mlongClicked);
+                if (Math.abs(oldX - newX) < sens && !longClick) {
                     if(imageClickListener != null)
                         imageClickListener.onClick(getCurrentItem());
                     return true;
                 }
+                else if (Math.abs(oldX - newX) < sens && Math.abs(oldY - newY) < sens && longClick)
+                {
+                    if(imageClickListener != null)
+                        imageClickListener.onLongClick(getCurrentItem());
+                    return true;
+                }
                 oldX = 0;
                 newX = 0;
                 break;
+
         }
 
         return super.onTouchEvent(ev);

carouselview/src/main/java/com/synnapps/carouselview/ImageClickListener.java

@@ -6,4 +6,6 @@
 
 public interface ImageClickListener {
     void onClick(int position);
+
+    void onLongClick(int position);
 }

sample/src/main/java/com/synnapps/example/carouselview/SampleCarouselViewActivity.java

@@ -60,6 +60,12 @@ protected void onCreate(Bundle savedInstanceState) {
             public void onClick(int position) {
                 Toast.makeText(SampleCarouselViewActivity.this, "Clicked item: "+ position, Toast.LENGTH_SHORT).show();
             }
+
+            @Override
+            public void onLongClick(int position) {
+                Toast.makeText(SampleCarouselViewActivity.this, "Long clicked item: "+ position, Toast.LENGTH_SHORT).show();
+            }
+
         });
 
     }

sample/src/main/res/layout/activity_sample_carousel_view.xml

@@ -11,6 +11,7 @@
         android:layout_width="match_parent"
         android:layout_height="200dp"
         android:background="#444"
+        android:longClickable="true"
         app:animateOnBoundary="true"
         app:autoPlay="true"
         app:fillColor="#FFFFFFFF"