FP2-1995: MusicFX: Integrate latest AOSP fixes and improvements

Merge branch 'marshmallow-mr2-release' into HEAD

Change-Id: Ib1d54fad1a5284c9b455201988c705efd15a1194
diff --git a/src/com/android/musicfx/SeekBarRotator.java b/src/com/android/musicfx/SeekBarRotator.java
new file mode 100644
index 0000000..d4ef0ca
--- /dev/null
+++ b/src/com/android/musicfx/SeekBarRotator.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.musicfx;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+
+
+/*
+ *  This ViewGroup contains a single view, which will be rotated by 90 degrees counterclockwise.
+ */
+
+public class SeekBarRotator extends ViewGroup {
+
+
+    public SeekBarRotator(Context context) {
+        super(context);
+    }
+
+    public SeekBarRotator(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        final View child = getChildAt(0);
+
+        if (child.getVisibility() != GONE) {
+            // swap width and height for child
+            measureChild(child, heightMeasureSpec, widthMeasureSpec);
+            setMeasuredDimension(
+                    child.getMeasuredHeightAndState(),
+                    child.getMeasuredWidthAndState());
+        } else {
+            setMeasuredDimension(
+                    resolveSizeAndState(0, widthMeasureSpec, 0),
+                    resolveSizeAndState(0, heightMeasureSpec, 0));
+        }
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        final View child = getChildAt(0);
+
+        if (child.getVisibility() != GONE) {
+            // rotate the child 90 degrees counterclockwise around its upper-left
+            child.setPivotX(0);
+            child.setPivotY(0);
+            child.setRotation(-90);
+
+            // place the child below this view, so it rotates into view
+            int mywidth = r - l;
+            int myheight = b - t;
+            int childwidth = myheight;
+            int childheight = mywidth;
+
+            child.layout(0, myheight, childwidth, myheight + childheight);
+        }
+    }
+
+}