mirror of
https://github.com/LawnchairLauncher/lawnchair.git
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Changing the overviewState to show appsearch and floating header
Change-Id: I2cfd61cfc9978e4c8e4520f0f7217e49e7344c79
This commit is contained in:
Sunny Goyal
@@ -0,0 +1,230 @@
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.touch;
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import static com.android.launcher3.anim.Interpolators.scrollInterpolatorForVelocity;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.ValueAnimator;
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import android.util.Log;
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import android.view.MotionEvent;
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import com.android.launcher3.Launcher;
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import com.android.launcher3.LauncherState;
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import com.android.launcher3.Utilities;
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import com.android.launcher3.anim.AnimatorPlaybackController;
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import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
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import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
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import com.android.launcher3.util.TouchController;
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/**
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* TouchController for handling state changes
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*/
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public abstract class AbstractStateChangeTouchController extends AnimatorListenerAdapter
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implements TouchController, SwipeDetector.Listener {
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private static final String TAG = "ASCTouchController";
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public static final float RECATCH_REJECTION_FRACTION = .0875f;
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public static final int SINGLE_FRAME_MS = 16;
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// Progress after which the transition is assumed to be a success in case user does not fling
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public static final float SUCCESS_TRANSITION_PROGRESS = 0.5f;
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protected final Launcher mLauncher;
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protected final SwipeDetector mDetector;
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private boolean mNoIntercept;
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protected int mStartContainerType;
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protected LauncherState mFromState;
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protected LauncherState mToState;
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protected AnimatorPlaybackController mCurrentAnimation;
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private float mStartProgress;
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// Ratio of transition process [0, 1] to drag displacement (px)
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private float mProgressMultiplier;
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public AbstractStateChangeTouchController(Launcher l, SwipeDetector.Direction dir) {
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mLauncher = l;
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mDetector = new SwipeDetector(l, this, dir);
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}
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protected abstract boolean canInterceptTouch(MotionEvent ev);
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/**
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* Initializes the {@code mFromState} and {@code mToState} and swipe direction to use for
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* the detector. In can of disabling swipe, return 0.
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*/
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protected abstract int getSwipeDirection(MotionEvent ev);
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@Override
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public final boolean onControllerInterceptTouchEvent(MotionEvent ev) {
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if (ev.getAction() == MotionEvent.ACTION_DOWN) {
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mNoIntercept = !canInterceptTouch(ev);
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if (mNoIntercept) {
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return false;
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}
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// Now figure out which direction scroll events the controller will start
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// calling the callbacks.
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final int directionsToDetectScroll;
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boolean ignoreSlopWhenSettling = false;
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if (mCurrentAnimation != null) {
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if (mCurrentAnimation.getProgressFraction() > 1 - RECATCH_REJECTION_FRACTION) {
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directionsToDetectScroll = SwipeDetector.DIRECTION_POSITIVE;
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} else if (mCurrentAnimation.getProgressFraction() < RECATCH_REJECTION_FRACTION ) {
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directionsToDetectScroll = SwipeDetector.DIRECTION_NEGATIVE;
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} else {
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directionsToDetectScroll = SwipeDetector.DIRECTION_BOTH;
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ignoreSlopWhenSettling = true;
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}
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} else {
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directionsToDetectScroll = getSwipeDirection(ev);
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if (directionsToDetectScroll == 0) {
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mNoIntercept = true;
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return false;
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}
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}
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mDetector.setDetectableScrollConditions(
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directionsToDetectScroll, ignoreSlopWhenSettling);
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}
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if (mNoIntercept) {
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return false;
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}
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onControllerTouchEvent(ev);
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return mDetector.isDraggingOrSettling();
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}
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@Override
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public final boolean onControllerTouchEvent(MotionEvent ev) {
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return mDetector.onTouchEvent(ev);
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}
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protected float getShiftRange() {
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return mLauncher.getAllAppsController().getShiftRange();
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}
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protected abstract float initCurrentAnimation();
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@Override
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public void onDragStart(boolean start) {
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if (mCurrentAnimation == null) {
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mStartProgress = 0;
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mProgressMultiplier = initCurrentAnimation();
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mCurrentAnimation.getTarget().addListener(this);
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mCurrentAnimation.dispatchOnStart();
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} else {
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mCurrentAnimation.pause();
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mStartProgress = mCurrentAnimation.getProgressFraction();
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}
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}
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@Override
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public boolean onDrag(float displacement, float velocity) {
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float deltaProgress = mProgressMultiplier * displacement;
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mCurrentAnimation.setPlayFraction(deltaProgress + mStartProgress);
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return true;
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}
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@Override
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public void onDragEnd(float velocity, boolean fling) {
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final int logAction;
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final LauncherState targetState;
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final float progress = mCurrentAnimation.getProgressFraction();
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if (fling) {
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logAction = Touch.FLING;
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targetState =
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Float.compare(Math.signum(velocity), Math.signum(mProgressMultiplier)) == 0
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? mToState : mFromState;
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// snap to top or bottom using the release velocity
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} else {
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logAction = Touch.SWIPE;
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targetState = (progress > SUCCESS_TRANSITION_PROGRESS) ? mToState : mFromState;
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}
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final float endProgress;
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final float startProgress;
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final long duration;
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if (targetState == mToState) {
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endProgress = 1;
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if (progress >= 1) {
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duration = 0;
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startProgress = 1;
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} else {
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startProgress = Utilities.boundToRange(
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progress + velocity * SINGLE_FRAME_MS / getShiftRange(), 0f, 1f);
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duration = SwipeDetector.calculateDuration(velocity,
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endProgress - Math.max(progress, 0));
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}
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} else {
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endProgress = 0;
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if (progress <= 0) {
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duration = 0;
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startProgress = 0;
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} else {
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startProgress = Utilities.boundToRange(
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progress + velocity * SINGLE_FRAME_MS / getShiftRange(), 0f, 1f);
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duration = SwipeDetector.calculateDuration(velocity,
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Math.min(progress, 1) - endProgress);
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}
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}
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mCurrentAnimation.setEndAction(() -> onSwipeInteractionCompleted(targetState, logAction));
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ValueAnimator anim = mCurrentAnimation.getAnimationPlayer();
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anim.setFloatValues(startProgress, endProgress);
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anim.setDuration(duration).setInterpolator(scrollInterpolatorForVelocity(velocity));
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anim.start();
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}
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protected int getDirectionForLog() {
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return mToState.ordinal > mFromState.ordinal ? Direction.UP : Direction.DOWN;
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}
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protected void onSwipeInteractionCompleted(LauncherState targetState, int logAction) {
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if (targetState != mFromState) {
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// Transition complete. log the action
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mLauncher.getUserEventDispatcher().logStateChangeAction(logAction,
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getDirectionForLog(),
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mStartContainerType,
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mFromState.containerType,
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mToState.containerType,
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mLauncher.getWorkspace().getCurrentPage());
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}
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clearState();
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mLauncher.getStateManager().goToState(targetState, false /* animated */);
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}
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protected void clearState() {
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mCurrentAnimation = null;
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mDetector.finishedScrolling();
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}
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@Override
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public void onAnimationCancel(Animator animation) {
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if (mCurrentAnimation != null && animation == mCurrentAnimation.getOriginalTarget()) {
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Log.e(TAG, "Who dare cancel the animation when I am in control", new Exception());
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clearState();
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}
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}
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}
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