Allow click over cards pass touch event handlers

Author: jaimeagudo

library/src/main/java/link/fls/swipestack/SwipeHelper.java

@@ -39,6 +39,9 @@ public class SwipeHelper implements View.OnTouchListener {
     private float mOpacityEnd = SwipeStack.DEFAULT_SWIPE_OPACITY;
     private int mAnimationDuration = SwipeStack.DEFAULT_ANIMATION_DURATION;
 
+    private boolean isClick = true;
+
+
     public SwipeHelper(SwipeStack swipeStack) {
         mSwipeStack = swipeStack;
     }
@@ -48,7 +51,9 @@ public boolean onTouch(View v, MotionEvent event) {
 
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
-                if(!mListenForTouchEvents || !mSwipeStack.isEnabled()) {
+                isClick = true;
+
+                if (!mListenForTouchEvents || !mSwipeStack.isEnabled()) {
                     return false;
                 }
 
@@ -67,6 +72,8 @@ public boolean onTouch(View v, MotionEvent event) {
                 float dx = event.getX(pointerIndex) - mDownX;
                 float dy = event.getY(pointerIndex) - mDownY;
 
+                isClick = Math.abs(dx + dy) < SwipeStack.CLICK_DISTANCE_THRESHOLD;
+
                 float newX = mObservedView.getX() + dx;
                 float newY = mObservedView.getY() + dy;
 
@@ -92,6 +99,10 @@ public boolean onTouch(View v, MotionEvent event) {
                 return true;
 
             case MotionEvent.ACTION_UP:
+                if (isClick) {
+                    v.performClick();
+                }
+
                 v.getParent().requestDisallowInterceptTouchEvent(false);
                 mSwipeStack.onSwipeEnd();
                 checkViewPosition();
@@ -104,7 +115,7 @@ public boolean onTouch(View v, MotionEvent event) {
     }
 
     private void checkViewPosition() {
-        if(!mSwipeStack.isEnabled()) {
+        if (!mSwipeStack.isEnabled()) {
             resetViewPosition();
             return;
         }

library/src/main/java/link/fls/swipestack/SwipeStack.java

@@ -44,6 +44,7 @@ public class SwipeStack extends ViewGroup {
     public static final float DEFAULT_SWIPE_OPACITY = 1f;
     public static final float DEFAULT_SCALE_FACTOR = 1f;
     public static final boolean DEFAULT_DISABLE_HW_ACCELERATION = true;
+    public static final float CLICK_DISTANCE_THRESHOLD = 6;
 
     private static final String KEY_SUPER_STATE = "superState";
     private static final String KEY_CURRENT_INDEX = "currentIndex";