Merge "Revert edge glow effect and restore damped overscroll" into ub-launcher3-dorval-polish (89b5b918) · Commits · e / os / android_packages_apps_Trebuchet

src/com/android/launcher3/PagedView.java

+78 −59

Original line number	Diff line number	Diff line
		@@ -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());
		@@ -972,47 +980,6 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
		range[1] = Math.max(0, getChildCount() - 1);
		}

		@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));
		@@ -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 {

src/com/android/launcher3/Workspace.java

+2 −24

Original line number	Diff line number	Diff line
		@@ -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
		@@ -1351,12 +1342,6 @@ 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);
		@@ -1529,13 +1514,6 @@ 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();

src/com/android/launcher3/folder/FolderPagedView.java

+0 −6

Original line number	Diff line number	Diff line
		@@ -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();
		}
		}

src/com/android/launcher3/util/LauncherEdgeEffect.java

deleted100644 → 0

+0 −365

Original line number	Diff line number	Diff line
		/*
		* 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;
		}
		}
		}
		}