Camera2: tweak volume key zoom and cleanup

- cleanup unused code
- cleanup codestyle
- add more zoom steps for smother zooming
- show zoom circle indicator during zoom

Change-Id: I5214fc2620a0c5167bfdc8e85f7115966c3b8bcf

1 files changed, 7 insertions, 0 deletions

diff --git a/src/com/android/camera/PreviewGestures.java b/src/com/android/camera/PreviewGestures.java
index 0ac6ce01c..7aa5fa84c 100644
--- a/src/com/android/camera/PreviewGestures.java
+++ b/src/com/android/camera/PreviewGestures.java
@@ -293,5 +293,12 @@ public class PreviewGestures
     public void onScaleEnd(ScaleGestureDetector detector) {
         mZoom.onScaleEnd(detector);
     }
+
+    public boolean onScaleStepResize(boolean direction) {
+        if(mZoom != null){
+            return mZoom.onScaleStepResize(direction);
+        }
+        return false;
+    }
 }