Fading out keyguard only content instead of occluding them with the scrim

The scrim is also used on the lock screen and should therefore be
behind the keyguard elements. Instead, we now fade out the views
on top of the scrim to achieve the same visual effect.

This also fixed an issue where the inset on the scrim was wrong in landscape

Fixes: 188660106
Test: drag down on lockscreen, observe content fading out
Change-Id: I72e6b964dde5ad3c579a0db71d7914f3e47eab6c

1 files changed, 7 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/keyguard/LockIconViewController.java b/packages/SystemUI/src/com/android/keyguard/LockIconViewController.java
index 6b85ba8420fc..ccc487925fe4 100644
--- a/packages/SystemUI/src/com/android/keyguard/LockIconViewController.java
+++ b/packages/SystemUI/src/com/android/keyguard/LockIconViewController.java
@@ -451,4 +451,11 @@ public class LockIconViewController extends ViewController<LockIconView> impleme
 
     private final AccessibilityManager.TouchExplorationStateChangeListener
             mTouchExplorationStateChangeListener = enabled -> updateClickListener();
+
+    /**
+     * Set the alpha of this view.
+     */
+    public void setAlpha(float alpha) {
+        mView.setAlpha(alpha);
+    }
 }