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Code Issues Projects Releases Wiki Activity

fixed viewpager navigation on RTL layout

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This commit is contained in:
X1nto 2021-03-07 15:20:19 +04:00
parent 6c506c989c
commit 85e2d0c5c2
1 changed files with 22 additions and 20 deletions
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42
app/src/main/java/com/vanced/manager/ui/WelcomeActivity.kt
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@ -1,10 +1,10 @@
package com.vanced.manager.ui package com.vanced.manager.ui
import android.animation.Animator
import android.animation.ValueAnimator import android.animation.ValueAnimator
import android.os.Bundle import android.os.Bundle
import android.view.animation.AccelerateDecelerateInterpolator import android.util.LayoutDirection
import androidx.appcompat.app.AppCompatActivity import androidx.appcompat.app.AppCompatActivity
import androidx.core.animation.addListener
import androidx.viewpager2.widget.ViewPager2 import androidx.viewpager2.widget.ViewPager2
import com.vanced.manager.adapter.WelcomePageAdapter import com.vanced.manager.adapter.WelcomePageAdapter
import com.vanced.manager.databinding.ActivityWelcomeBinding import com.vanced.manager.databinding.ActivityWelcomeBinding
@ -12,21 +12,22 @@ import kotlin.math.abs
class WelcomeActivity : AppCompatActivity() { class WelcomeActivity : AppCompatActivity() {
private lateinit var viewPager2: ViewPager2
private lateinit var binding: ActivityWelcomeBinding private lateinit var binding: ActivityWelcomeBinding
private var isRtl = false
override fun onCreate(savedInstanceState: Bundle?) { override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
binding = ActivityWelcomeBinding.inflate(layoutInflater) binding = ActivityWelcomeBinding.inflate(layoutInflater)
setContentView(binding.root) setContentView(binding.root)
viewPager2 = binding.welcomeViewpager isRtl = resources.configuration.layoutDirection == LayoutDirection.RTL
viewPager2.apply {
binding.welcomeViewpager.apply {
adapter = WelcomePageAdapter(this@WelcomeActivity) adapter = WelcomePageAdapter(this@WelcomeActivity)
isUserInputEnabled = false isUserInputEnabled = false
setPageTransformer { page, position -> setPageTransformer { page, position ->
page.apply { page.apply {
val pageWidth = width val pageWidth = width.toFloat()
//Thank you, fragula dev! //Thank you, fragula dev!
when { when {
position > 0 && position < 1 -> { position > 0 && position < 1 -> {
@ -35,7 +36,7 @@ class WelcomeActivity : AppCompatActivity() {
} }
position > -1 && position <= 0 -> { position > -1 && position <= 0 -> {
alpha = 1.0f - abs(position * 0.7f) alpha = 1.0f - abs(position * 0.7f)
translationX = -pageWidth * position / 1.3F translationX = pageWidth.rtlCompat * position / 1.3F
} }
} }
} }
@ -44,17 +45,21 @@ class WelcomeActivity : AppCompatActivity() {
} }
override fun onBackPressed() { override fun onBackPressed() {
if (viewPager2.currentItem == 0) { with (binding) {
super.onBackPressed() if (welcomeViewpager.currentItem == 0) {
} else { super.onBackPressed()
navigateTo(viewPager2.currentItem - 1) } else {
navigateTo(welcomeViewpager.currentItem - 1)
}
} }
} }
fun navigateTo(position: Int) { fun navigateTo(position: Int) {
viewPager2.currentPosition = position binding.welcomeViewpager.currentPosition = position
} }
private val Float.rtlCompat get() = if (isRtl) this else -this
//Shit way to implement animation duration, but at least it works //Shit way to implement animation duration, but at least it works
private var ViewPager2.currentPosition: Int private var ViewPager2.currentPosition: Int
get() = currentItem get() = currentItem
@ -66,16 +71,13 @@ class WelcomeActivity : AppCompatActivity() {
addUpdateListener { valueAnimator -> addUpdateListener { valueAnimator ->
val currentValue = valueAnimator.animatedValue as Int val currentValue = valueAnimator.animatedValue as Int
val currentPxToDrag = (currentValue - previousValue).toFloat() val currentPxToDrag = (currentValue - previousValue).toFloat()
fakeDragBy(-currentPxToDrag) fakeDragBy(currentPxToDrag.rtlCompat)
previousValue = currentValue previousValue = currentValue
} }
addListener(object : Animator.AnimatorListener { addListener(
override fun onAnimationStart(animation: Animator?) { beginFakeDrag() } onStart = { beginFakeDrag() },
override fun onAnimationEnd(animation: Animator?) { endFakeDrag() } onEnd = { endFakeDrag() }
override fun onAnimationCancel(animation: Animator?) {} )
override fun onAnimationRepeat(animation: Animator?) {}
})
interpolator = AccelerateDecelerateInterpolator()
duration = 500 duration = 500
start() start()
} }