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slow down the swipe speed during slideshow

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This commit is contained in:
tibbi 2017-09-05 14:35:30 +02:00
parent f7ca4a657d
commit a1cda024c7
2 changed files with 45 additions and 6 deletions
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50
app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
View file

@ -1,5 +1,7 @@
package com.simplemobiletools.gallery.activities
import android.animation.Animator
import android.animation.ValueAnimator
import android.app.Activity
import android.content.Intent
import android.content.pm.ActivityInfo
@ -20,6 +22,7 @@ import android.provider.MediaStore
import android.support.v4.view.ViewPager
import android.util.DisplayMetrics
import android.view.*
import android.view.animation.DecelerateInterpolator
import com.simplemobiletools.commons.dialogs.ConfirmationDialog
import com.simplemobiletools.commons.dialogs.PropertiesDialog
import com.simplemobiletools.commons.dialogs.RenameItemDialog
@ -288,6 +291,46 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
}
}
private fun animatePagerTransition(forward: Boolean) {
val oldPosition = view_pager.currentItem
val animator = ValueAnimator.ofInt(0, view_pager.width)
animator.addListener(object : Animator.AnimatorListener {
override fun onAnimationRepeat(animation: Animator?) {
}
override fun onAnimationEnd(animation: Animator?) {
view_pager.endFakeDrag()
if (view_pager.currentItem == oldPosition) {
stopSlideshow()
toast(R.string.slideshow_ended)
}
}
override fun onAnimationCancel(animation: Animator?) {
view_pager.endFakeDrag()
}
override fun onAnimationStart(animation: Animator?) {
}
})
animator.interpolator = DecelerateInterpolator()
animator.addUpdateListener(object : ValueAnimator.AnimatorUpdateListener {
var oldDragPosition = 0
override fun onAnimationUpdate(animation: ValueAnimator) {
val dragPosition = animation.animatedValue as Int
val dragOffset = dragPosition - oldDragPosition
oldDragPosition = dragPosition
view_pager.fakeDragBy(dragOffset * (if (forward) 1f else -1f))
}
})
animator.duration = SLIDESHOW_SCROLL_DURATION
view_pager.beginFakeDrag()
animator.start()
}
private fun stopSlideshow() {
if (mIsSlideshowActive) {
showSystemUI()
@ -313,12 +356,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
}
private fun swipeToNextMedium() {
val before = view_pager.currentItem
view_pager.currentItem = if (mSlideshowMoveBackwards) --view_pager.currentItem else ++view_pager.currentItem
if (before == view_pager.currentItem) {
stopSlideshow()
toast(R.string.slideshow_ended)
}
animatePagerTransition(!mSlideshowMoveBackwards)
}
private fun getMediaForSlideshow(): Boolean {

1
app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt
View file

@ -45,6 +45,7 @@ val SLIDESHOW_RANDOM_ORDER = "slideshow_random_order"
val SLIDESHOW_USE_FADE = "slideshow_use_fade"
val SLIDESHOW_MOVE_BACKWARDS = "slideshow_move_backwards"
val SLIDESHOW_DEFAULT_INTERVAL = 5
val SLIDESHOW_SCROLL_DURATION = 500L
val NOMEDIA = ".nomedia"