Merge "Revert edge glow effect and restore damped overscroll" into ub-launcher3-dorval-polish

4 files changed, 80 insertions, 454 deletions

diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 255677a53..ed225c9ec 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -24,7 +24,6 @@ import android.animation.TimeInterpolator;
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.res.TypedArray;
-import android.graphics.Canvas;
 import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.os.Bundle;
@@ -49,7 +48,6 @@ import android.view.animation.Interpolator;
 
 import com.android.launcher3.anim.PropertyListBuilder;
 import com.android.launcher3.pageindicators.PageIndicator;
-import com.android.launcher3.util.LauncherEdgeEffect;
 import com.android.launcher3.util.Themes;
 import com.android.launcher3.util.Thunk;
 
@@ -70,6 +68,11 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     public static final int PAGE_SNAP_ANIMATION_DURATION = 750;
     protected static final int SLOW_PAGE_SNAP_ANIMATION_DURATION = 950;
 
+    // Overscroll constants
+    private final static int OVERSCROLL_PAGE_SNAP_ANIMATION_DURATION = 270;
+    private static final float OVERSCROLL_ACCELERATE_FACTOR = 2;
+    private static final float OVERSCROLL_DAMP_FACTOR = 0.07f;
+
     private static final float RETURN_TO_ORIGINAL_PAGE_THRESHOLD = 0.33f;
     // The page is moved more than halfway, automatically move to the next page on touch up.
     private static final float SIGNIFICANT_MOVE_THRESHOLD = 0.4f;
@@ -145,6 +148,13 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
 
     protected boolean mWasInOverscroll = false;
 
+    // mOverScrollX is equal to getScrollX() when we're within the normal scroll range. Otherwise
+    // it is equal to the scaled overscroll position. We use a separate value so as to prevent
+    // the screens from continuing to translate beyond the normal bounds.
+    protected int mOverScrollX;
+
+    protected int mUnboundedScrollX;
+
     // Page Indicator
     @Thunk int mPageIndicatorViewId;
     protected PageIndicator mPageIndicator;
@@ -184,10 +194,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     protected final Rect mInsets = new Rect();
     protected final boolean mIsRtl;
 
-    // Edge effect
-    private final LauncherEdgeEffect mEdgeGlowLeft = new LauncherEdgeEffect();
-    private final LauncherEdgeEffect mEdgeGlowRight = new LauncherEdgeEffect();
-
     public PagedView(Context context) {
         this(context, null);
     }
@@ -229,8 +235,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         setWillNotDraw(false);
 
         int edgeEffectColor = Themes.getAttrColor(getContext(), android.R.attr.colorEdgeEffect);
-        mEdgeGlowLeft.setColor(edgeEffectColor);
-        mEdgeGlowRight.setColor(edgeEffectColor);
     }
 
     protected void setDefaultInterpolator(Interpolator interpolator) {
@@ -476,7 +480,7 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     }
 
     protected int getUnboundedScrollX() {
-        return getScrollX();
+        return mUnboundedScrollX;
     }
 
     @Override
@@ -499,6 +503,8 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
             x = Math.max(x, mFreeScrollMinScrollX);
         }
 
+        mUnboundedScrollX = x;
+
         boolean isXBeforeFirstPage = mIsRtl ? (x > mMaxScrollX) : (x < 0);
         boolean isXAfterLastPage = mIsRtl ? (x < 0) : (x > mMaxScrollX);
         if (isXBeforeFirstPage) {
@@ -526,6 +532,7 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
                 overScroll(0);
                 mWasInOverscroll = false;
             }
+            mOverScrollX = x;
             super.scrollTo(x, y);
         }
 
@@ -565,7 +572,8 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         if (mScroller.computeScrollOffset()) {
             // Don't bother scrolling if the page does not need to be moved
             if (getUnboundedScrollX() != mScroller.getCurrX()
-                    || getScrollY() != mScroller.getCurrY()) {
+                    || getScrollY() != mScroller.getCurrY()
+                    || mOverScrollX != mScroller.getCurrX()) {
                 float scaleX = mFreeScroll ? getScaleX() : 1f;
                 int scrollX = (int) (mScroller.getCurrX() * (1 / scaleX));
                 scrollTo(scrollX, mScroller.getCurrY());
@@ -973,47 +981,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     }
 
     @Override
-    public void draw(Canvas canvas) {
-        super.draw(canvas);
-        if (getPageCount() > 0) {
-            if (!mEdgeGlowLeft.isFinished()) {
-                final int restoreCount = canvas.save();
-                Rect display = mViewport;
-                canvas.translate(display.left, display.top);
-                canvas.rotate(270);
-
-                getEdgeVerticalPosition(sTmpIntPoint);
-                canvas.translate(display.top - sTmpIntPoint[1], 0);
-                mEdgeGlowLeft.setSize(sTmpIntPoint[1] - sTmpIntPoint[0], display.width());
-                if (mEdgeGlowLeft.draw(canvas)) {
-                    postInvalidateOnAnimation();
-                }
-                canvas.restoreToCount(restoreCount);
-            }
-            if (!mEdgeGlowRight.isFinished()) {
-                final int restoreCount = canvas.save();
-                Rect display = mViewport;
-                canvas.translate(display.left + mPageScrolls[mIsRtl ? 0 : (getPageCount() - 1)], display.top);
-                canvas.rotate(90);
-
-                getEdgeVerticalPosition(sTmpIntPoint);
-
-                canvas.translate(sTmpIntPoint[0] - display.top, -display.width());
-                mEdgeGlowRight.setSize(sTmpIntPoint[1] - sTmpIntPoint[0], display.width());
-                if (mEdgeGlowRight.draw(canvas)) {
-                    postInvalidateOnAnimation();
-                }
-                canvas.restoreToCount(restoreCount);
-            }
-        }
-    }
-
-    /**
-     * Returns the top and bottom position for the edge effect.
-     */
-    protected abstract void getEdgeVerticalPosition(int[] pos);
-
-    @Override
     public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) {
         int page = indexToPage(indexOfChild(child));
         if (page != mCurrentPage || !mScroller.isFinished()) {
@@ -1335,6 +1302,29 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         }
     }
 
+    // This curve determines how the effect of scrolling over the limits of the page dimishes
+    // as the user pulls further and further from the bounds
+    private float overScrollInfluenceCurve(float f) {
+        f -= 1.0f;
+        return f * f * f + 1.0f;
+    }
+
+    protected float acceleratedOverFactor(float amount) {
+        int screenSize = getViewportWidth();
+
+        // We want to reach the max over scroll effect when the user has
+        // over scrolled half the size of the screen
+        float f = OVERSCROLL_ACCELERATE_FACTOR * (amount / screenSize);
+
+        if (Float.compare(f, 0f) == 0) return 0;
+
+        // Clamp this factor, f, to -1 < f < 1
+        if (Math.abs(f) >= 1) {
+            f /= Math.abs(f);
+        }
+        return f;
+    }
+
     // While layout transitions are occurring, a child's position may stray from its baseline
     // position. This method returns the magnitude of this stray at any given time.
     public int getLayoutTransitionOffsetForPage(int index) {
@@ -1356,13 +1346,25 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
 
     protected void dampedOverScroll(float amount) {
         int screenSize = getViewportWidth();
+
         float f = (amount / screenSize);
-        if (f < 0) {
-            mEdgeGlowLeft.onPull(-f);
-        } else if (f > 0) {
-            mEdgeGlowRight.onPull(f);
+
+        if (Float.compare(f, 0f) == 0) return;
+
+        f = f / (Math.abs(f)) * (overScrollInfluenceCurve(Math.abs(f)));
+
+        // Clamp this factor, f, to -1 < f < 1
+        if (Math.abs(f) >= 1) {
+            f /= Math.abs(f);
+        }
+
+        int overScrollAmount = (int) Math.round(OVERSCROLL_DAMP_FACTOR * f * screenSize);
+        if (amount < 0) {
+            mOverScrollX = overScrollAmount;
+            super.scrollTo(mOverScrollX, getScrollY());
         } else {
-            return;
+            mOverScrollX = mMaxScrollX + overScrollAmount;
+            super.scrollTo(mOverScrollX, getScrollY());
         }
         invalidate();
     }
@@ -1371,6 +1373,14 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         dampedOverScroll(amount);
     }
 
+    protected float maxOverScroll() {
+        // Using the formula in overScroll, assuming that f = 1.0 (which it should generally not
+        // exceed). Used to find out how much extra wallpaper we need for the over scroll effect
+        float f = 1.0f;
+        f = f / (Math.abs(f)) * (overScrollInfluenceCurve(Math.abs(f)));
+        return OVERSCROLL_DAMP_FACTOR * f;
+    }
+
     /**
      * return true if freescroll has been enabled, false otherwise
      */
@@ -1715,8 +1725,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         mCancelTap = false;
         mTouchState = TOUCH_STATE_REST;
         mActivePointerId = INVALID_POINTER;
-        mEdgeGlowLeft.onRelease();
-        mEdgeGlowRight.onRelease();
     }
 
     /**
@@ -1830,7 +1838,18 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     }
 
     protected void snapToDestination() {
-        snapToPage(getPageNearestToCenterOfScreen(), PAGE_SNAP_ANIMATION_DURATION);
+        snapToPage(getPageNearestToCenterOfScreen(), getPageSnapDuration());
+    }
+
+    protected boolean isInOverScroll() {
+        return (mOverScrollX > mMaxScrollX || mOverScrollX < 0);
+    }
+
+    protected int getPageSnapDuration() {
+        if (isInOverScroll()) {
+            return OVERSCROLL_PAGE_SNAP_ANIMATION_DURATION;
+        }
+        return PAGE_SNAP_ANIMATION_DURATION;
     }
 
     public static class ScrollInterpolator implements Interpolator {
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 767e33278..919c60a34 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -300,8 +300,7 @@ public class Workspace extends PagedView
     boolean mScrollInteractionBegan;
     boolean mStartedSendingScrollEvents;
     float mLastOverlayScroll = 0;
-    // Total over scrollX in the overlay direction.
-    private int mUnboundedScrollX;
+
     private boolean mForceDrawAdjacentPages = false;
     // Total over scrollX in the overlay direction.
     private float mOverlayTranslation;
@@ -1321,18 +1320,10 @@ public class Workspace extends PagedView
         onOverlayScrollChanged(0);
     }
 
-    @Override
-    protected int getUnboundedScrollX() {
-        if (isScrollingOverlay()) {
-            return mUnboundedScrollX;
-        }
-
-        return super.getUnboundedScrollX();
-    }
 
     private boolean isScrollingOverlay() {
         return mLauncherOverlay != null &&
-                ((mIsRtl && mUnboundedScrollX > mMaxScrollX) || (!mIsRtl && mUnboundedScrollX < 0));
+                ((mIsRtl && getUnboundedScrollX() > mMaxScrollX) || (!mIsRtl && getUnboundedScrollX() < 0));
     }
 
     @Override
@@ -1352,12 +1343,6 @@ public class Workspace extends PagedView
     }
 
     @Override
-    public void scrollTo(int x, int y) {
-        mUnboundedScrollX = x;
-        super.scrollTo(x, y);
-    }
-
-    @Override
     protected void onScrollChanged(int l, int t, int oldl, int oldt) {
         super.onScrollChanged(l, t, oldl, oldt);
 
@@ -1530,13 +1515,6 @@ public class Workspace extends PagedView
     }
 
     @Override
-    protected void getEdgeVerticalPosition(int[] pos) {
-        View child = getChildAt(getPageCount() - 1);
-        pos[0] = child.getTop();
-        pos[1] = child.getBottom();
-    }
-
-    @Override
     protected void notifyPageSwitchListener() {
         super.notifyPageSwitchListener();
 
diff --git a/src/com/android/launcher3/folder/FolderPagedView.java b/src/com/android/launcher3/folder/FolderPagedView.java
index d0ac9f4b1..f62568f78 100644
--- a/src/com/android/launcher3/folder/FolderPagedView.java
+++ b/src/com/android/launcher3/folder/FolderPagedView.java
@@ -701,10 +701,4 @@ public class FolderPagedView extends PagedView {
     public int itemsPerPage() {
         return mMaxItemsPerPage;
     }
-
-    @Override
-    protected void getEdgeVerticalPosition(int[] pos) {
-        pos[0] = 0;
-        pos[1] = getViewportHeight();
-    }
 }
diff --git a/src/com/android/launcher3/util/LauncherEdgeEffect.java b/src/com/android/launcher3/util/LauncherEdgeEffect.java
deleted file mode 100644
index 3e3b255ad..000000000
--- a/src/com/android/launcher3/util/LauncherEdgeEffect.java
+++ /dev/null
@@ -1,365 +0,0 @@
-/*
- * 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.launcher3.util;
-
-import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.graphics.Rect;
-import android.view.animation.AnimationUtils;
-import android.view.animation.DecelerateInterpolator;
-import android.view.animation.Interpolator;
-
-/**
- * This class differs from the framework {@link android.widget.EdgeEffect}:
- *   1) It does not use PorterDuffXfermode
- *   2) The width to radius factor is smaller (0.5 instead of 0.75)
- */
-public class LauncherEdgeEffect {
-
-    // Time it will take the effect to fully recede in ms
-    private static final int RECEDE_TIME = 600;
-
-    // Time it will take before a pulled glow begins receding in ms
-    private static final int PULL_TIME = 167;
-
-    // Time it will take in ms for a pulled glow to decay to partial strength before release
-    private static final int PULL_DECAY_TIME = 2000;
-
-    private static final float MAX_ALPHA = 0.5f;
-
-    private static final float MAX_GLOW_SCALE = 2.f;
-
-    private static final float PULL_GLOW_BEGIN = 0.f;
-
-    // Minimum velocity that will be absorbed
-    private static final int MIN_VELOCITY = 100;
-    // Maximum velocity, clamps at this value
-    private static final int MAX_VELOCITY = 10000;
-
-    private static final float EPSILON = 0.001f;
-
-    private static final double ANGLE = Math.PI / 6;
-    private static final float SIN = (float) Math.sin(ANGLE);
-    private static final float COS = (float) Math.cos(ANGLE);
-
-    private float mGlowAlpha;
-    private float mGlowScaleY;
-
-    private float mGlowAlphaStart;
-    private float mGlowAlphaFinish;
-    private float mGlowScaleYStart;
-    private float mGlowScaleYFinish;
-
-    private long mStartTime;
-    private float mDuration;
-
-    private final Interpolator mInterpolator;
-
-    private static final int STATE_IDLE = 0;
-    private static final int STATE_PULL = 1;
-    private static final int STATE_ABSORB = 2;
-    private static final int STATE_RECEDE = 3;
-    private static final int STATE_PULL_DECAY = 4;
-
-    private static final float PULL_DISTANCE_ALPHA_GLOW_FACTOR = 0.8f;
-
-    private static final int VELOCITY_GLOW_FACTOR = 6;
-
-    private int mState = STATE_IDLE;
-
-    private float mPullDistance;
-
-    private final Rect mBounds = new Rect();
-    private final Paint mPaint = new Paint();
-    private float mRadius;
-    private float mBaseGlowScale;
-    private float mDisplacement = 0.5f;
-    private float mTargetDisplacement = 0.5f;
-
-    /**
-     * Construct a new EdgeEffect with a theme appropriate for the provided context.
-     */
-    public LauncherEdgeEffect() {
-        mPaint.setAntiAlias(true);
-        mPaint.setStyle(Paint.Style.FILL);
-        mInterpolator = new DecelerateInterpolator();
-    }
-
-    /**
-     * Set the size of this edge effect in pixels.
-     *
-     * @param width Effect width in pixels
-     * @param height Effect height in pixels
-     */
-    public void setSize(int width, int height) {
-        final float r = width * 0.5f / SIN;
-        final float y = COS * r;
-        final float h = r - y;
-        final float or = height * 0.75f / SIN;
-        final float oy = COS * or;
-        final float oh = or - oy;
-
-        mRadius = r;
-        mBaseGlowScale = h > 0 ? Math.min(oh / h, 1.f) : 1.f;
-
-        mBounds.set(mBounds.left, mBounds.top, width, (int) Math.min(height, h));
-    }
-
-    /**
-     * Reports if this EdgeEffect's animation is finished. If this method returns false
-     * after a call to {@link #draw(Canvas)} the host widget should schedule another
-     * drawing pass to continue the animation.
-     *
-     * @return true if animation is finished, false if drawing should continue on the next frame.
-     */
-    public boolean isFinished() {
-        return mState == STATE_IDLE;
-    }
-
-    /**
-     * Immediately finish the current animation.
-     * After this call {@link #isFinished()} will return true.
-     */
-    public void finish() {
-        mState = STATE_IDLE;
-    }
-
-    /**
-     * A view should call this when content is pulled away from an edge by the user.
-     * This will update the state of the current visual effect and its associated animation.
-     * The host view should always {@link android.view.View#invalidate()} after this
-     * and draw the results accordingly.
-     *
-     * <p>Views using EdgeEffect should favor {@link #onPull(float, float)} when the displacement
-     * of the pull point is known.</p>
-     *
-     * @param deltaDistance Change in distance since the last call. Values may be 0 (no change) to
-     *                      1.f (full length of the view) or negative values to express change
-     *                      back toward the edge reached to initiate the effect.
-     */
-    public void onPull(float deltaDistance) {
-        onPull(deltaDistance, 0.5f);
-    }
-
-    /**
-     * A view should call this when content is pulled away from an edge by the user.
-     * This will update the state of the current visual effect and its associated animation.
-     * The host view should always {@link android.view.View#invalidate()} after this
-     * and draw the results accordingly.
-     *
-     * @param deltaDistance Change in distance since the last call. Values may be 0 (no change) to
-     *                      1.f (full length of the view) or negative values to express change
-     *                      back toward the edge reached to initiate the effect.
-     * @param displacement The displacement from the starting side of the effect of the point
-     *                     initiating the pull. In the case of touch this is the finger position.
-     *                     Values may be from 0-1.
-     */
-    public void onPull(float deltaDistance, float displacement) {
-        final long now = AnimationUtils.currentAnimationTimeMillis();
-        mTargetDisplacement = displacement;
-        if (mState == STATE_PULL_DECAY && now - mStartTime < mDuration) {
-            return;
-        }
-        if (mState != STATE_PULL) {
-            mGlowScaleY = Math.max(PULL_GLOW_BEGIN, mGlowScaleY);
-        }
-        mState = STATE_PULL;
-
-        mStartTime = now;
-        mDuration = PULL_TIME;
-
-        mPullDistance += deltaDistance;
-
-        final float absdd = Math.abs(deltaDistance);
-        mGlowAlpha = mGlowAlphaStart = Math.min(MAX_ALPHA,
-                mGlowAlpha + (absdd * PULL_DISTANCE_ALPHA_GLOW_FACTOR));
-
-        if (mPullDistance == 0) {
-            mGlowScaleY = mGlowScaleYStart = 0;
-        } else {
-            final float scale = (float) (Math.max(0, 1 - 1 /
-                    Math.sqrt(Math.abs(mPullDistance) * mBounds.height()) - 0.3d) / 0.7d);
-
-            mGlowScaleY = mGlowScaleYStart = scale;
-        }
-
-        mGlowAlphaFinish = mGlowAlpha;
-        mGlowScaleYFinish = mGlowScaleY;
-    }
-
-    /**
-     * Call when the object is released after being pulled.
-     * This will begin the "decay" phase of the effect. After calling this method
-     * the host view should {@link android.view.View#invalidate()} and thereby
-     * draw the results accordingly.
-     */
-    public void onRelease() {
-        mPullDistance = 0;
-
-        if (mState != STATE_PULL && mState != STATE_PULL_DECAY) {
-            return;
-        }
-
-        mState = STATE_RECEDE;
-        mGlowAlphaStart = mGlowAlpha;
-        mGlowScaleYStart = mGlowScaleY;
-
-        mGlowAlphaFinish = 0.f;
-        mGlowScaleYFinish = 0.f;
-
-        mStartTime = AnimationUtils.currentAnimationTimeMillis();
-        mDuration = RECEDE_TIME;
-    }
-
-    /**
-     * Call when the effect absorbs an impact at the given velocity.
-     * Used when a fling reaches the scroll boundary.
-     *
-     * <p>When using a {@link android.widget.Scroller} or {@link android.widget.OverScroller},
-     * the method <code>getCurrVelocity</code> will provide a reasonable approximation
-     * to use here.</p>
-     *
-     * @param velocity Velocity at impact in pixels per second.
-     */
-    public void onAbsorb(int velocity) {
-        mState = STATE_ABSORB;
-        velocity = Math.min(Math.max(MIN_VELOCITY, Math.abs(velocity)), MAX_VELOCITY);
-
-        mStartTime = AnimationUtils.currentAnimationTimeMillis();
-        mDuration = 0.15f + (velocity * 0.02f);
-
-        // The glow depends more on the velocity, and therefore starts out
-        // nearly invisible.
-        mGlowAlphaStart = 0.3f;
-        mGlowScaleYStart = Math.max(mGlowScaleY, 0.f);
-
-
-        // Growth for the size of the glow should be quadratic to properly
-        // respond
-        // to a user's scrolling speed. The faster the scrolling speed, the more
-        // intense the effect should be for both the size and the saturation.
-        mGlowScaleYFinish = Math.min(0.025f + (velocity * (velocity / 100) * 0.00015f) / 2, 1.f);
-        // Alpha should change for the glow as well as size.
-        mGlowAlphaFinish = Math.max(
-                mGlowAlphaStart, Math.min(velocity * VELOCITY_GLOW_FACTOR * .00001f, MAX_ALPHA));
-        mTargetDisplacement = 0.5f;
-    }
-
-    /**
-     * Set the color of this edge effect in argb.
-     *
-     * @param color Color in argb
-     */
-    public void setColor(int color) {
-        mPaint.setColor(color);
-    }
-
-    /**
-     * Return the color of this edge effect in argb.
-     * @return The color of this edge effect in argb
-     */
-    public int getColor() {
-        return mPaint.getColor();
-    }
-
-    /**
-     * Draw into the provided canvas. Assumes that the canvas has been rotated
-     * accordingly and the size has been set. The effect will be drawn the full
-     * width of X=0 to X=width, beginning from Y=0 and extending to some factor <
-     * 1.f of height.
-     *
-     * @param canvas Canvas to draw into
-     * @return true if drawing should continue beyond this frame to continue the
-     *         animation
-     */
-    public boolean draw(Canvas canvas) {
-        update();
-
-        final float centerX = mBounds.centerX();
-        final float centerY = mBounds.height() - mRadius;
-
-        canvas.scale(1.f, Math.min(mGlowScaleY, 1.f) * mBaseGlowScale, centerX, 0);
-
-        final float displacement = Math.max(0, Math.min(mDisplacement, 1.f)) - 0.5f;
-        float translateX = mBounds.width() * displacement / 2;
-        mPaint.setAlpha((int) (0xff * mGlowAlpha));
-        canvas.drawCircle(centerX + translateX, centerY, mRadius, mPaint);
-
-        boolean oneLastFrame = false;
-        if (mState == STATE_RECEDE && mGlowScaleY == 0) {
-            mState = STATE_IDLE;
-            oneLastFrame = true;
-        }
-
-        return mState != STATE_IDLE || oneLastFrame;
-    }
-
-    /**
-     * Return the maximum height that the edge effect will be drawn at given the original
-     * {@link #setSize(int, int) input size}.
-     * @return The maximum height of the edge effect
-     */
-    public int getMaxHeight() {
-        return (int) (mBounds.height() * MAX_GLOW_SCALE + 0.5f);
-    }
-
-    private void update() {
-        final long time = AnimationUtils.currentAnimationTimeMillis();
-        final float t = Math.min((time - mStartTime) / mDuration, 1.f);
-
-        final float interp = mInterpolator.getInterpolation(t);
-
-        mGlowAlpha = mGlowAlphaStart + (mGlowAlphaFinish - mGlowAlphaStart) * interp;
-        mGlowScaleY = mGlowScaleYStart + (mGlowScaleYFinish - mGlowScaleYStart) * interp;
-        mDisplacement = (mDisplacement + mTargetDisplacement) / 2;
-
-        if (t >= 1.f - EPSILON) {
-            switch (mState) {
-                case STATE_ABSORB:
-                    mState = STATE_RECEDE;
-                    mStartTime = AnimationUtils.currentAnimationTimeMillis();
-                    mDuration = RECEDE_TIME;
-
-                    mGlowAlphaStart = mGlowAlpha;
-                    mGlowScaleYStart = mGlowScaleY;
-
-                    // After absorb, the glow should fade to nothing.
-                    mGlowAlphaFinish = 0.f;
-                    mGlowScaleYFinish = 0.f;
-                    break;
-                case STATE_PULL:
-                    mState = STATE_PULL_DECAY;
-                    mStartTime = AnimationUtils.currentAnimationTimeMillis();
-                    mDuration = PULL_DECAY_TIME;
-
-                    mGlowAlphaStart = mGlowAlpha;
-                    mGlowScaleYStart = mGlowScaleY;
-
-                    // After pull, the glow should fade to nothing.
-                    mGlowAlphaFinish = 0.f;
-                    mGlowScaleYFinish = 0.f;
-                    break;
-                case STATE_PULL_DECAY:
-                    mState = STATE_RECEDE;
-                    break;
-                case STATE_RECEDE:
-                    mState = STATE_IDLE;
-                    break;
-            }
-        }
-    }
-}