fab: move in direct ratio to scroll

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
index e0a335d4..e71793d9 100644
--- a/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
+++ b/app/src/main/java/com/wireguard/android/widget/fab/FloatingActionsMenu.java
@@ -67,6 +67,8 @@ public class FloatingActionsMenu extends ViewGroup {
     @Nullable private TouchDelegateGroup mTouchDelegateGroup;
     @Nullable private OnFloatingActionsMenuUpdateListener mListener;
     private final Rect touchArea = new Rect(0, 0, 0, 0);
+    private float scrollYTranslation;
+    private float behaviorYTranslation;
 
     public FloatingActionsMenu(final Context context) {
         this(context, null);
@@ -103,6 +105,24 @@ public class FloatingActionsMenu extends ViewGroup {
         createAddButton(context);
     }
 
+    public float getScrollYTranslation() {
+        return scrollYTranslation;
+    }
+
+    public void setScrollYTranslation(final float scrollYTranslation) {
+        this.scrollYTranslation = scrollYTranslation;
+        setTranslationY(behaviorYTranslation + scrollYTranslation);
+    }
+
+    public float getBehaviorYTranslation() {
+        return behaviorYTranslation;
+    }
+
+    public void setBehaviorYTranslation(final float behaviorYTranslation) {
+        this.behaviorYTranslation = behaviorYTranslation;
+        setTranslationY(behaviorYTranslation + scrollYTranslation);
+    }
+
     public void setOnFloatingActionsMenuUpdateListener(final OnFloatingActionsMenuUpdateListener listener) {
         mListener = listener;
     }