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Change image on swipe

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This commit is contained in:
davidoskky 2020-12-14 16:40:14 +01:00
parent cda09a4e8a
commit cb07227cb7
1 changed files with 33 additions and 0 deletions
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33
app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ImageFragment.kt
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@ -6,6 +6,7 @@ import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import apps.amine.bou.readerforselfoss.R
import kotlinx.android.synthetic.main.fragment_article.view.webcontent
import kotlin.math.abs
class ImageFragment : Fragment() {
@ -31,6 +32,28 @@ class ImageFragment : Fragment() {
view.webcontent.settings.setSupportZoom(true)
view.webcontent.settings.setBuiltInZoomControls(true)
view.webcontent.settings.setDisplayZoomControls(false)
val gestureDetector = GestureDetector(activity, object : GestureDetector.SimpleOnGestureListener() {
override fun onFling(e1: MotionEvent?, e2: MotionEvent?, velocityX: Float, velocityY: Float): Boolean {
val SWIPE_MIN_DISTANCE = 120
val SWIPE_MAX_OFF_PATH = 250
val SWIPE_THRESHOLD_VELOCITY = 200
if (abs(e1!!.y - e2!!.y) > SWIPE_MAX_OFF_PATH)
return false
if (e1.x - e2.x > SWIPE_MIN_DISTANCE
&& abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
changeImage(1)
}
else if (e2.x - e1.x > SWIPE_MIN_DISTANCE
&& abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
changeImage(-1)
}
return super.onFling(e1, e2, velocityX, velocityY);
}
})
view.webcontent.setOnTouchListener { _, event -> gestureDetector.onTouchEvent(event)}
view.webcontent.loadUrl(allImages[position])
return view
@ -45,6 +68,16 @@ class ImageFragment : Fragment() {
super.onDestroy()
}
fun changeImage(change : Int) {
position += change
if (position < 0 || position >= allImages.size) {
position -= change
}
else {
view!!.webcontent.loadUrl(allImages[position])
}
}
companion object {
private const val ARG_POSITION = "position"
private const val ARG_IMAGES = "allImages"