Revert edge glow effect and restore damped overscroll

Bug 62628421

Change-Id: Iab6ac567e98e63ade34de8817c3ae1f58c25ba19

1 files changed, 0 insertions, 365 deletions

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;
-            }
-        }
-    }
-}