do not allow clicking or long pressing thumbnail sections

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt

@@ -320,7 +320,9 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             initZoomListener()
             val fastscroller = if (config.scrollHorizontally) media_horizontal_fastscroller else media_vertical_fastscroller
             MediaAdapter(this, mMedia, this, mIsGetImageIntent || mIsGetVideoIntent || mIsGetAnyIntent, mAllowPickingMultiple, media_grid, fastscroller) {
-                itemClicked((it as Medium).path)
+                if (it is Medium) {
+                    itemClicked(it.path)
+                }
             }.apply {
                 setupZoomListener(mZoomListener)
                 media_grid.adapter = this

app/src/main/kotlin/com/simplemobiletools/gallery/adapters/MediaAdapter.kt

@@ -81,7 +81,8 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
             visibleItemPaths.add(tmbItem.path)
         }
 
-        val view = holder.bindView(tmbItem, !allowMultiplePicks) { itemView, adapterPosition ->
+        val allowLongPress = !allowMultiplePicks && tmbItem is Medium
+        val view = holder.bindView(tmbItem, allowLongPress) { itemView, adapterPosition ->
             if (tmbItem is Medium) {
                 setupThumbnail(itemView, tmbItem)
             } else {

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/PickMediumDialog.kt

@@ -64,8 +64,10 @@ class PickMediumDialog(val activity: BaseSimpleActivity, val path: String, val c
 
         shownMedia = media
         val adapter = MediaAdapter(activity, shownMedia, null, true, false, view.media_grid, null) {
-            callback((it as Medium).path)
-            dialog.dismiss()
+            if (it is Medium) {
+                callback(it.path)
+                dialog.dismiss()
+            }
         }
 
         val scrollHorizontally = activity.config.scrollHorizontally && isGridViewType