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@ -1,45 +1,46 @@
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package eu.kanade.tachiyomi.ui.main
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import android.animation.ObjectAnimator
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import android.view.View
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import android.view.ViewTreeObserver
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import android.view.animation.DecelerateInterpolator
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import com.google.android.material.tabs.TabLayout
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import androidx.annotation.Keep
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class TabsAnimator(val tabs: TabLayout) {
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class ViewHeightAnimator(val view: View) {
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/**
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* The default height of the tab layout. It's unknown until the view is layout.
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* The default height of the view. It's unknown until the view is layout.
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*/
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private var tabsHeight = 0
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private var height = 0
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/**
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* Whether the last state of the tab layout is shown or hidden.
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* Whether the last state of the view is shown or hidden.
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*/
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private var isLastStateShown = true
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/**
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* Animation used to expand and collapse the tab layout.
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* Animation used to expand and collapse the view.
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*/
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private val animation by lazy {
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ObjectAnimator.ofInt(this, "height", tabsHeight).apply {
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ObjectAnimator.ofInt(this, "height", height).apply {
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duration = 300L
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interpolator = DecelerateInterpolator()
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}
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}
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init {
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tabs.viewTreeObserver.addOnGlobalLayoutListener(
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view.viewTreeObserver.addOnGlobalLayoutListener(
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object : ViewTreeObserver.OnGlobalLayoutListener {
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override fun onGlobalLayout() {
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if (tabs.height > 0) {
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tabs.viewTreeObserver.removeOnGlobalLayoutListener(this)
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if (view.height > 0) {
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view.viewTreeObserver.removeOnGlobalLayoutListener(this)
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// Save the tabs default height.
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tabsHeight = tabs.height
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height = view.height
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// Now that we know the height, set the initial height.
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if (isLastStateShown) {
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setHeight(tabsHeight)
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setHeight(height)
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} else {
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setHeight(0)
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}
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@ -54,9 +55,10 @@ class TabsAnimator(val tabs: TabLayout) {
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*
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* @param newHeight The new height of the tab layout.
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*/
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@Keep
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fun setHeight(newHeight: Int) {
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tabs.layoutParams.height = newHeight
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tabs.requestLayout()
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view.layoutParams.height = newHeight
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view.requestLayout()
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}
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/**
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@ -64,7 +66,7 @@ class TabsAnimator(val tabs: TabLayout) {
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* reflection.
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*/
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fun getHeight(): Int {
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return tabs.layoutParams.height
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return view.layoutParams.height
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}
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/**
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@ -72,8 +74,8 @@ class TabsAnimator(val tabs: TabLayout) {
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*/
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fun expand() {
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if (isMeasured) {
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if (getHeight() != tabsHeight) {
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animation.setIntValues(tabsHeight)
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if (getHeight() != height) {
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animation.setIntValues(height)
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animation.start()
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} else {
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animation.cancel()
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@ -101,5 +103,5 @@ class TabsAnimator(val tabs: TabLayout) {
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* Returns whether the tab layout has a known height.
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*/
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private val isMeasured: Boolean
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get() = tabsHeight > 0
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get() = height > 0
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}
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arkon
5 years ago