Merge pull request #15018 from zilongshanren/tweakPageViewTurningEvent

tweak PageView page turning event time.

cocos/ui/UIPageView.cpp

@@ -260,6 +260,11 @@ void PageView::handleReleaseLogic(Touch *touch)
         }
     }
 }
+    
+float PageView::getAutoScrollStopEpsilon()
+{
+    return 0.001;
+}
 
 void PageView::pageTurningEvent()
 {

cocos/ui/UIPageView.h

@@ -349,6 +349,7 @@ CC_CONSTRUCTOR_ACCESS:
 
 protected:
     void pageTurningEvent();
+    virtual float getAutoScrollStopEpsilon() override;
 
     virtual void remedyLayoutParameter(Widget* item)override;
     virtual void moveInnerContainer(const Vec2& deltaMove, bool canStartBounceBack) override;

cocos/ui/UIScrollView.cpp

@@ -502,6 +502,11 @@ bool ScrollView::isNecessaryAutoScrollBrake()
     return false;
 }
     
+float ScrollView::getAutoScrollStopEpsilon()
+{
+    return FLT_EPSILON;
+}
+    
 void ScrollView::processAutoScrolling(float deltaTime)
 {
     // Make auto scroll shorter if it needs to deaccelerate.
@@ -520,7 +525,7 @@ void ScrollView::processAutoScrolling(float deltaTime)
     
     // Calculate the new position
     Vec2 newPosition = _autoScrollStartPosition + (_autoScrollTargetDelta * percentage);
-    bool reachedEnd = (percentage == 1);
+    bool reachedEnd = fabs(percentage - 1) <= this->getAutoScrollStopEpsilon();
     
     if(_bounceEnabled)
     {

cocos/ui/UIScrollView.h

@@ -624,6 +624,7 @@ protected:
     void updateScrollBar(const Vec2& outOfBoundary);
 
 protected:
+    virtual float getAutoScrollStopEpsilon();
     Layout* _innerContainer;
 
     Direction _direction;