adding a panorama video button for toggling cardboard mode

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

@@ -24,7 +24,7 @@ import kotlinx.android.synthetic.main.activity_panorama_photo.*
 open class PanoramaPhotoActivity : SimpleActivity() {
     private val CARDBOARD_DISPLAY_MODE = 3
 
-    private var isFullScreen = false
+    private var isFullscreen = false
     private var isExploreEnabled = true
     private var isRendering = false
 
@@ -131,7 +131,7 @@ open class PanoramaPhotoActivity : SimpleActivity() {
         }
 
         window.decorView.setOnSystemUiVisibilityChangeListener { visibility ->
-            isFullScreen = visibility and View.SYSTEM_UI_FLAG_FULLSCREEN != 0
+            isFullscreen = visibility and View.SYSTEM_UI_FLAG_FULLSCREEN != 0
             toggleButtonVisibility()
         }
     }
@@ -159,8 +159,9 @@ open class PanoramaPhotoActivity : SimpleActivity() {
     }
 
     private fun setupButtonMargins() {
+        val navBarHeight = navigationBarHeight
         (cardboard.layoutParams as RelativeLayout.LayoutParams).apply {
-            bottomMargin = navigationBarHeight
+            bottomMargin = navBarHeight
             rightMargin = navigationBarWidth
         }
 
@@ -168,17 +169,17 @@ open class PanoramaPhotoActivity : SimpleActivity() {
     }
 
     private fun toggleButtonVisibility() {
-        cardboard.animate().alpha(if (isFullScreen) 0f else 1f)
-        cardboard.isClickable = !isFullScreen
+        cardboard.animate().alpha(if (isFullscreen) 0f else 1f)
+        cardboard.isClickable = !isFullscreen
 
-        explore.animate().alpha(if (isFullScreen) 0f else 1f)
-        explore.isClickable = !isFullScreen
+        explore.animate().alpha(if (isFullscreen) 0f else 1f)
+        explore.isClickable = !isFullscreen
     }
 
     private fun handleClick() {
-        isFullScreen = !isFullScreen
+        isFullscreen = !isFullscreen
         toggleButtonVisibility()
-        if (isFullScreen) {
+        if (isFullscreen) {
             hideSystemUI(false)
         } else {
             showSystemUI(false)

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

@@ -20,10 +20,7 @@ import com.simplemobiletools.commons.extensions.toast
 import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_STORAGE
 import com.simplemobiletools.commons.helpers.isPiePlus
 import com.simplemobiletools.gallery.R
-import com.simplemobiletools.gallery.extensions.config
-import com.simplemobiletools.gallery.extensions.hideSystemUI
-import com.simplemobiletools.gallery.extensions.navigationBarHeight
-import com.simplemobiletools.gallery.extensions.showSystemUI
+import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.helpers.HIDE_PLAY_PAUSE_DELAY
 import com.simplemobiletools.gallery.helpers.MIN_SKIP_LENGTH
 import com.simplemobiletools.gallery.helpers.PATH
@@ -33,6 +30,8 @@ import kotlinx.android.synthetic.main.bottom_video_time_holder.*
 import java.io.File
 
 open class PanoramaVideoActivity : SimpleActivity(), SeekBar.OnSeekBarChangeListener {
+    private val CARDBOARD_DISPLAY_MODE = 3
+
     private var mIsFullscreen = false
     private var mIsExploreEnabled = true
     private var mIsRendering = false
@@ -59,6 +58,10 @@ open class PanoramaVideoActivity : SimpleActivity(), SeekBar.OnSeekBarChangeList
 
         setupButtonMargins()
 
+        cardboard.setOnClickListener {
+            vr_video_view.displayMode = CARDBOARD_DISPLAY_MODE
+        }
+
         explore.setOnClickListener {
             mIsExploreEnabled = !mIsExploreEnabled
             vr_video_view.setPureTouchTracking(mIsExploreEnabled)
@@ -254,14 +257,27 @@ open class PanoramaVideoActivity : SimpleActivity(), SeekBar.OnSeekBarChangeList
     }
 
     private fun setupButtonMargins() {
-        (video_time_holder.layoutParams as RelativeLayout.LayoutParams).bottomMargin = navigationBarHeight
+        val navBarHeight = navigationBarHeight
+        video_time_holder.apply {
+            (layoutParams as RelativeLayout.LayoutParams).bottomMargin = navBarHeight
+            setPadding(paddingLeft, paddingTop, navigationBarWidth, paddingBottom)
+        }
+
         video_time_holder.onGlobalLayout {
-            (explore.layoutParams as RelativeLayout.LayoutParams).bottomMargin = navigationBarHeight + video_time_holder.height
+            (explore.layoutParams as RelativeLayout.LayoutParams).bottomMargin = navBarHeight + video_time_holder.height
+
+            (cardboard.layoutParams as RelativeLayout.LayoutParams).apply {
+                bottomMargin = navBarHeight + video_time_holder.height
+                rightMargin = navigationBarWidth
+            }
             explore.requestLayout()
         }
     }
 
     private fun toggleButtonVisibility() {
+        cardboard.animate().alpha(if (mIsFullscreen) 0f else 1f)
+        cardboard.isClickable = !mIsFullscreen
+
         explore.animate().alpha(if (mIsFullscreen) 0f else 1f)
         explore.isClickable = !mIsFullscreen
 

app/src/main/res/layout/activity_panorama_video.xml

@@ -20,6 +20,15 @@
         android:padding="@dimen/activity_margin"
         android:src="@drawable/ic_explore"/>
 
+    <ImageView
+        android:id="@+id/cardboard"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentBottom="true"
+        android:padding="@dimen/activity_margin"
+        android:src="@drawable/ic_cardboard"/>
+
     <ImageView
         android:id="@+id/video_play_outline"
         android:layout_width="@dimen/play_outline_size_big"