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Code Issues Pull Requests Releases Wiki Activity

ViewImageFragment: finalize transition to BigImageViewer. Now it should correctly handle EXIF rotation, do not stuck at transition and pick preview image if it's in cache but full image isn't

This commit is contained in:
Alibek Omarov 2020-07-26 03:11:33 +03:00
parent 08780eade8
commit 1e26196e9e
1 changed files with 128 additions and 59 deletions
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187
app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt
View File

@ -25,11 +25,15 @@ import android.os.Bundle
import android.util.Log
import android.view.*
import android.widget.TextView
import androidx.exifinterface.media.ExifInterface
import com.bumptech.glide.Glide
import com.bumptech.glide.load.DataSource
import com.bumptech.glide.load.engine.GlideException
import com.bumptech.glide.request.RequestListener
import com.bumptech.glide.request.target.CustomTarget
import com.bumptech.glide.request.target.Target
import com.bumptech.glide.request.transition.Transition
import com.github.piasy.biv.BigImageViewer
import com.github.piasy.biv.loader.ImageLoader
import com.github.piasy.biv.view.GlideImageViewFactory
import com.keylesspalace.tusky.R
@ -42,9 +46,10 @@ import kotlinx.android.synthetic.main.fragment_view_image.*
import java.io.File
import java.lang.Exception
import kotlin.math.abs
import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouchListener {
class ViewImageFragment : ViewMediaFragment() {
interface PhotoActionsListener {
fun onBringUp()
fun onDismiss()
@ -60,6 +65,10 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
@Volatile
private var startedTransition = false
private var uri = Uri.EMPTY
private var previewUri = Uri.EMPTY
private var showingPreview = false
override lateinit var descriptionView: TextView
override fun onAttach(context: Context) {
super.onAttach(context)
@ -70,7 +79,11 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
descriptionView = mediaDescription
photoView.transitionName = url
startedTransition = false
loadImageFromNetwork(url, previewUrl)
uri = Uri.parse(url)
if(previewUrl != null && !previewUrl.equals(url)) {
previewUri = Uri.parse(previewUrl)
}
loadImageFromNetwork()
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
@ -78,51 +91,52 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
return inflater.inflate(R.layout.fragment_view_image, container, false)
}
private var lastY = 0.0f
private var swipeStartedWithOneFinger = false
private lateinit var gestureDetector : GestureDetector
override fun onTouch(v: View, event: MotionEvent): Boolean {
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
gestureDetector.onTouchEvent(event)
private val imageOnTouchListener = object : View.OnTouchListener {
private var lastY = 0.0f
private var swipeStartedWithOneFinger = false
if(event.pointerCount != 1) {
swipeStartedWithOneFinger = false
return false
}
override fun onTouch(v: View, event: MotionEvent): Boolean {
// This part is for scaling/translating on vertical move.
// We use raw coordinates to get the correct ones during scaling
gestureDetector.onTouchEvent(event)
var result = false
when(event.action) {
MotionEvent.ACTION_DOWN -> {
swipeStartedWithOneFinger = true
lastY = event.rawY
}
MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
onGestureEnd()
if(event.pointerCount != 1) {
swipeStartedWithOneFinger = false
return false
}
MotionEvent.ACTION_MOVE -> {
if(swipeStartedWithOneFinger && photoView.ssiv.scale <= photoView.ssiv.minScale) {
val diff = event.rawY - lastY
// This code is to prevent transformations during page scrolling
// If we are already translating or we reached the threshold, then transform.
if (photoView.translationY != 0f || abs(diff) > 40) {
photoView.translationY += (diff)
val scale = (-abs(photoView.translationY) / 720 + 1).coerceAtLeast(0.5f)
photoView.scaleY = scale
photoView.scaleX = scale
lastY = event.rawY
when(event.action) {
MotionEvent.ACTION_DOWN -> {
swipeStartedWithOneFinger = true
lastY = event.rawY
}
MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
onGestureEnd()
swipeStartedWithOneFinger = false
}
MotionEvent.ACTION_MOVE -> {
if(swipeStartedWithOneFinger && photoView.ssiv.scale <= photoView.ssiv.minScale) {
val diff = event.rawY - lastY
// This code is to prevent transformations during page scrolling
// If we are already translating or we reached the threshold, then transform.
if (photoView.translationY != 0f || abs(diff) > 40) {
photoView.translationY += (diff)
val scale = (-abs(photoView.translationY) / 720 + 1).coerceAtLeast(0.5f)
photoView.scaleY = scale
photoView.scaleX = scale
lastY = event.rawY
}
}
result = true
}
}
}
return result
return false
}
}
@SuppressLint("ClickableViewAccessibility")
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
@ -135,7 +149,7 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
})
// photoView.setOnTouchListener(this)
photoView.setImageLoaderCallback(this)
photoView.setImageLoaderCallback(imageLoaderCallback)
photoView.setImageViewFactory(GlideImageViewFactory())
val arguments = this.requireArguments()
@ -190,33 +204,88 @@ class ViewImageFragment : ViewMediaFragment(), ImageLoader.Callback, View.OnTouc
photoView.ssiv?.recycle()
}
private fun loadImageFromNetwork(url: String, previewUrl: String?) {
photoView.showImage(Uri.parse(previewUrl), Uri.parse(url))
private inner class DummyCacheTarget(val ctx: Context, val requestPreview : Boolean) : CustomTarget<File>() {
override fun onLoadCleared(placeholder: Drawable?) {}
override fun onLoadFailed(errorDrawable: Drawable?) {
if(requestPreview) {
// no preview, no full image in cache, load full image
// forget about fancy transition
showingPreview = false
photoView.showImage(uri)
} else {
// let's start downloading full image that we supposedly don't have
BigImageViewer.prefetch(uri)
// meanwhile poke cache about preview image
Glide.with(ctx).asFile()
.load(previewUri)
.dontAnimate()
.onlyRetrieveFromCache(true)
.into(DummyCacheTarget(ctx, true))
}
}
override fun onResourceReady(resource: File, transition: Transition<in File>?) {
showingPreview = requestPreview
if(requestPreview) {
// have preview cached but not full image
photoView.showImage(previewUri, uri, true)
} else {
photoView.showImage(uri)
}
}
}
override fun onSuccess(image: File?) {
progressBar?.hide() // Always hide the progress bar on success
photoActionsListener.onBringUp()
photoView.ssiv?.setOnTouchListener(this)
}
override fun onFail(error: Exception?) {
progressBar?.hide()
photoActionsListener.onBringUp()
}
override fun onCacheHit(imageType: Int, image: File?) {
}
override fun onCacheMiss(imageType: Int, image: File?) {
}
override fun onFinish() {
}
override fun onProgress(progress: Int) {
private fun loadImageFromNetwork() {
Glide.with(this).asFile()
.load(uri)
.onlyRetrieveFromCache(true)
.dontAnimate()
.into(DummyCacheTarget(context!!, false))
}
override fun onTransitionEnd() {
// if we had preview, load full image, as transition has ended
if (showingPreview) {
showingPreview = false
photoView.loadMainImageNow()
}
}
private val imageLoaderCallback = object : ImageLoader.Callback {
override fun onSuccess(image: File?) {
if(!showingPreview) {
progressBar?.hide()
photoView.ssiv?.let {
it.orientation = SubsamplingScaleImageView.ORIENTATION_USE_EXIF
it.setOnTouchListener(imageOnTouchListener)
}
}
}
override fun onFail(error: Exception?) {
progressBar?.hide()
}
override fun onCacheHit(imageType: Int, image: File?) {
// image is here, bring up the activity!
photoActionsListener.onBringUp()
}
override fun onStart() {
// cache miss but image is downloading, bring up the activity
photoActionsListener.onBringUp()
}
override fun onCacheMiss(imageType: Int, image: File?) {
// this callback is useless because it's called after
// image is downloaded or pulled from cache
// so in case of cache miss, onStart is used
}
override fun onFinish() {}
override fun onProgress(progress: Int) {
// TODO: make use of it :)
}
}
}