0.4.9

Author: A.Badakhshan

app/src/main/java/com/alirezabdn/whygoogle/MainActivity.kt

@@ -1,9 +1,11 @@
 package com.alirezabdn.whygoogle
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import com.alirezabdn.whygoogle.databinding.ActivityMainBinding
 import ir.ayantech.whygoogle.activity.SwipableWhyGoogleActivity
+import ir.ayantech.whygoogle.fragment.WhyGoogleFragment
 import ir.ayantech.whygoogle.widget.SwipeBackContainer
 
 class MainActivity : SwipableWhyGoogleActivity<ActivityMainBinding>() {
@@ -19,6 +21,11 @@ class MainActivity : SwipableWhyGoogleActivity<ActivityMainBinding>() {
     override val fragmentHost: SwipeBackContainer
         get() = binding.containerVp
 
+    override fun onTopFragmentChanged(whyGoogleFragment: WhyGoogleFragment<*>) {
+        super.onTopFragmentChanged(whyGoogleFragment)
+        Log.d("WhG", "onTopFragmentChanged")
+    }
+
 //    override val containerId: Int
 //        get() = R.id.containerFl
 }

build.gradle

@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.5.31"
+    ext.kotlin_version = "1.5.30"
     repositories {
         google()
         jcenter()

whygoogle/build.gradle

@@ -11,7 +11,7 @@ android {
         minSdkVersion 17
         targetSdkVersion 30
         versionCode 1
-        versionName "0.4.8"
+        versionName "0.4.9"
     }
     buildFeatures {
         viewBinding true

whygoogle/src/main/java/ir/ayantech/whygoogle/activity/SwipableWhyGoogleActivity.kt

@@ -9,11 +9,9 @@ import androidx.fragment.app.Fragment
 import androidx.viewbinding.ViewBinding
 import com.alirezabdn.whyfinal.adapter.FragmentStateAdapter
 import com.alirezabdn.whyfinal.adapter.FragmentViewHolder
-import com.alirezabdn.whyfinal.widget.NonFinalViewPager2
 import ir.ayantech.whygoogle.custom.AsyncLayoutInflater
 import ir.ayantech.whygoogle.fragment.WhyGoogleFragment
 import ir.ayantech.whygoogle.helper.changeToNeedsOfWhyGoogle
-import ir.ayantech.whygoogle.helper.setCurrentItem
 import ir.ayantech.whygoogle.helper.trying
 import ir.ayantech.whygoogle.helper.viewBinding
 import ir.ayantech.whygoogle.standard.IOSPageTransition
@@ -41,41 +39,30 @@ abstract class SwipableWhyGoogleActivity<T : ViewBinding> : AppCompatActivity(),
         }
     }
 
-    private var transitioning = false
-
-    val isTransitioning: Boolean by lazy {
-        transitioning
-    }
+    private var lastKnownFragment: WhyGoogleFragment<*>? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(binding.root)
-        fragmentHost.registerOnPageChangeCallback(object :
-            NonFinalViewPager2.OnPageChangeCallback() {
-            override fun onPageScrollStateChanged(state: Int) {
-                super.onPageScrollStateChanged(state)
-                if (state == NonFinalViewPager2.SCROLL_STATE_DRAGGING)
-                    transitioning = true
-                if (state == NonFinalViewPager2.SCROLL_STATE_IDLE) {
-                    val previousCount = getFragmentCount()
-                    while (fragmentHost.currentItem <= getFragmentCount() - 2) {
-                        fragmentStack.removeLast()
-                    }
-                    if (previousCount >= fragmentHost.currentItem + 2) {
-                        whyGoogleFragmentAdapter.notifyItemRangeRemoved(
-                            fragmentHost.currentItem + 1,
-                            previousCount - fragmentHost.currentItem - 1
-                        )
-                        fragmentStack.lastOrNull()?.onBackToFragment()
-                    }
-                    onTopFragmentChanged(fragmentStack.last())
-                    fragmentStack.last().onFragmentVisible()
-                    if (transitioning)
-                        fragmentStack.lastOrNull()?.onEnterAnimationEnded()
-                    transitioning = false
-                }
+        fragmentHost.onPageSettled {
+            val previousCount = getFragmentCount()
+            while (fragmentHost.currentItem <= getFragmentCount() - 2) {
+                fragmentStack.removeLast()
             }
-        })
+            if (previousCount >= fragmentHost.currentItem + 2) {
+                whyGoogleFragmentAdapter.notifyItemRangeRemoved(
+                    fragmentHost.currentItem + 1,
+                    previousCount - fragmentHost.currentItem - 1
+                )
+                fragmentStack.lastOrNull()?.onFragmentVisible()
+                fragmentStack.lastOrNull()?.onBackToFragment()
+                onTopFragmentChanged(fragmentStack.last())
+            }
+            if (lastKnownFragment == fragmentStack.lastOrNull())
+                return@onPageSettled
+            fragmentStack.lastOrNull()?.onEnterAnimationEnded()
+            lastKnownFragment = fragmentStack.lastOrNull()
+        }
     }
 
     fun accessViews(block: T.() -> Unit) {

whygoogle/src/main/java/ir/ayantech/whygoogle/helper/ViewPager2Extention.kt

@@ -1,10 +1,6 @@
 package ir.ayantech.whygoogle.helper
 
-import android.animation.Animator
-import android.animation.TimeInterpolator
-import android.animation.ValueAnimator
 import android.view.View
-import android.view.animation.AccelerateDecelerateInterpolator
 import androidx.recyclerview.widget.RecyclerView
 import com.alirezabdn.whyfinal.widget.NonFinalViewPager2
 
@@ -25,39 +21,4 @@ fun RecyclerView.changeSnapSpeed() {
     } catch (e: Exception) {
         e.printStackTrace()
     }
-}
-
-fun NonFinalViewPager2.setCurrentItem(
-    item: Int,
-    duration: Long,
-    interpolator: TimeInterpolator = AccelerateDecelerateInterpolator(),
-    pagePxWidth: Int = width // Default value taken from getWidth() from ViewPager2 view
-) {
-    val pxToDrag: Int = pagePxWidth * (item - currentItem)
-    val animator = ValueAnimator.ofInt(0, pxToDrag)
-    var previousValue = 0
-    animator.addUpdateListener { valueAnimator ->
-        val currentValue = valueAnimator.animatedValue as Int
-        val currentPxToDrag = (currentValue - previousValue).toFloat()
-        fakeDragBy(-currentPxToDrag)
-        previousValue = currentValue
-    }
-    animator.addListener(object : Animator.AnimatorListener {
-        override fun onAnimationStart(animation: Animator?) {
-            beginFakeDrag()
-        }
-
-        override fun onAnimationEnd(animation: Animator?) {
-            endFakeDrag()
-        }
-
-        override fun onAnimationCancel(animation: Animator?) { /* Ignored */
-        }
-
-        override fun onAnimationRepeat(animation: Animator?) { /* Ignored */
-        }
-    })
-    animator.interpolator = interpolator
-    animator.duration = duration
-    animator.start()
 }

whygoogle/src/main/java/ir/ayantech/whygoogle/widget/SwipeBackContainer.kt

@@ -1,16 +1,20 @@
 package ir.ayantech.whygoogle.widget
 
+import android.animation.Animator
+import android.animation.TimeInterpolator
+import android.animation.ValueAnimator
 import android.content.Context
 import android.graphics.Rect
 import android.os.Build
 import android.util.AttributeSet
 import android.view.MotionEvent
 import android.view.View
-import android.view.ViewConfiguration
 import android.view.ViewGroup
+import android.view.animation.AccelerateDecelerateInterpolator
 import androidx.annotation.RequiresApi
 import com.alirezabdn.whyfinal.widget.NonFinalViewPager2
 import ir.ayantech.whygoogle.activity.SwipableWhyGoogleActivity
+import ir.ayantech.whygoogle.helper.SimpleCallBack
 import kotlin.math.abs
 import kotlin.math.sign
 
@@ -31,7 +35,6 @@ class SwipeBackContainer : NonFinalViewPager2 {
         defStyleRes: Int
     ) : super(context, attrs, defStyleAttr, defStyleRes)
 
-    private var touchSlop = 0
     private var initialX = 0f
     private var initialY = 0f
 
@@ -61,10 +64,6 @@ class SwipeBackContainer : NonFinalViewPager2 {
         return null
     }
 
-    init {
-        touchSlop = ViewConfiguration.get(context).scaledTouchSlop
-    }
-
     private fun canViewScroll(view: View?, orientation: Int, delta: Float): Boolean {
         val direction = -delta.sign.toInt()
         return when (orientation) {
@@ -120,4 +119,51 @@ class SwipeBackContainer : NonFinalViewPager2 {
             }
         }
     }
+
+    fun setCurrentItem(
+        item: Int,
+        duration: Long,
+        interpolator: TimeInterpolator = AccelerateDecelerateInterpolator(),
+        pagePxWidth: Int = width // Default value taken from getWidth() from ViewPager2 view
+    ) {
+        val pxToDrag: Int = pagePxWidth * (item - currentItem)
+        val animator = ValueAnimator.ofInt(0, pxToDrag)
+        var previousValue = 0
+        animator.addUpdateListener { valueAnimator ->
+            val currentValue = valueAnimator.animatedValue as Int
+            val currentPxToDrag = (currentValue - previousValue).toFloat()
+            fakeDragBy(-currentPxToDrag)
+            previousValue = currentValue
+        }
+        animator.addListener(object : Animator.AnimatorListener {
+            override fun onAnimationStart(animation: Animator?) {
+                beginFakeDrag()
+            }
+
+            override fun onAnimationEnd(animation: Animator?) {
+                endFakeDrag()
+            }
+
+            override fun onAnimationCancel(animation: Animator?) { /* Ignored */
+            }
+
+            override fun onAnimationRepeat(animation: Animator?) { /* Ignored */
+            }
+        })
+        animator.interpolator = interpolator
+        animator.duration = duration
+        animator.start()
+    }
+
+    fun onPageSettled(callback: SimpleCallBack) {
+        this.registerOnPageChangeCallback(object :
+            NonFinalViewPager2.OnPageChangeCallback() {
+            override fun onPageScrollStateChanged(state: Int) {
+                super.onPageScrollStateChanged(state)
+                if (state == SCROLL_STATE_IDLE) {
+                    callback()
+                }
+            }
+        })
+    }
 }