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https://github.com/LawnchairLauncher/lawnchair.git
synced 2026-03-04 09:56:49 +00:00
Pull up all apps interaction
First phase implementation: dragging and animation interaction is implemented namely in two classes. ScrollGestureDetector and AllAppsTransitionController. FeatureFlag.LAUNCHER#_ALL_APPS_PULL_UP will be true for only AOSP and not in the extending builds. This way, we can safely iterate without turning it on the shipped ready version. b/28917826 Change-Id: I0501309c0121880ffe0555f82d6ac5a145581bb1
This commit is contained in:
Hyunyoung Song
@@ -0,0 +1,347 @@
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package com.android.launcher3.allapps;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.AnimatorSet;
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import android.animation.ObjectAnimator;
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import android.graphics.drawable.Drawable;
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import android.util.Log;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.animation.DecelerateInterpolator;
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import android.view.animation.Interpolator;
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import com.android.launcher3.Hotseat;
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import com.android.launcher3.Launcher;
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import com.android.launcher3.LauncherAnimUtils;
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import com.android.launcher3.util.TouchController;
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/**
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* Handles AllApps view transition.
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* 1) Slides all apps view using direct manipulation
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* 2) When finger is released, animate to either top or bottom accordingly.
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*
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* Algorithm:
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* If release velocity > THRES1, snap according to the direction of movement.
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* If release velocity < THRES1, snap according to either top or bottom depending on whether it's
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* closer to top or closer to the page indicator.
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*/
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public class AllAppsTransitionController implements TouchController, VerticalPullDetector.Listener {
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private static final String TAG = "AllAppsTrans";
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private static final boolean DBG = false;
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private static final float ANIMATION_DURATION = 500;
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private AllAppsContainerView mAppsView;
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private Hotseat mHotseat;
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private Drawable mHotseatBackground;
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private float mHotseatAlpha;
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private View mWorkspaceCurPage;
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private final Launcher mLauncher;
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private final VerticalPullDetector mDetector;
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// Animation in this class is controlled by a single variable {@link mProgressTransY}.
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// Visually, it represents top y coordinate of the all apps container. Using the
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// {@link mTranslation} as the denominator, this fraction value ranges in [0, 1].
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private float mProgressTransY; // numerator
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private float mTranslation = -1; // denominator
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private float mAnimationDuration;
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private float mCurY;
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private AnimatorSet mCurrentAnimation;
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public AllAppsTransitionController(Launcher launcher) {
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mLauncher = launcher;
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mDetector = new VerticalPullDetector(launcher);
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mDetector.setListener(this);
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}
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@Override
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public boolean onInterceptTouchEvent(MotionEvent ev) {
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init();
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if (mLauncher.getWorkspace().isInOverviewMode() ||
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mLauncher.isWidgetsViewVisible()) {
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return false;
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}
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if (ev.getAction() == MotionEvent.ACTION_DOWN) {
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mDetector.setAllAppsState(mLauncher.isAllAppsVisible(), mAppsView.isScrollAtTop());
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}
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mDetector.onTouchEvent(ev);
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return mDetector.mScrolling;
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}
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@Override
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public boolean onTouchEvent(MotionEvent ev) {
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return mDetector.onTouchEvent(ev);
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}
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private void init() {
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if (mAppsView != null) {
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return;
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}
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mAppsView = mLauncher.getAppsView();
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mHotseat = mLauncher.getHotseat();
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mWorkspaceCurPage = mLauncher.getWorkspace().getChildAt(
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mLauncher.getWorkspace().getCurrentPage());
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if (mHotseatBackground == null) {
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mHotseatBackground = mHotseat.getBackground();
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mHotseatAlpha = mHotseatBackground.getAlpha() / 255f;
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}
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}
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@Override
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public void onScrollStart(boolean start) {
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cancelAnimation();
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mCurrentAnimation = LauncherAnimUtils.createAnimatorSet();
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mCurY = mAppsView.getTranslationY();
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preparePull(start);
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}
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/**
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* @param start {@code true} if start of new drag.
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*/
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public void preparePull(boolean start) {
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if (start) {
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if (!mLauncher.isAllAppsVisible()) {
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mHotseat.setBackground(null);
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mAppsView.setVisibility(View.VISIBLE);
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mAppsView.getContentView().setVisibility(View.VISIBLE);
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mAppsView.setAlpha(mHotseatAlpha);
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mAppsView.setSearchBarVisible(false);
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if (mTranslation < 0) {
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mTranslation = mHotseat.getTop();
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setProgress(mTranslation);
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}
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} else {
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mLauncher.getWorkspace().setVisibility(View.VISIBLE);
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mLauncher.getWorkspace().setAlpha(1f);
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mLauncher.getWorkspace().onLauncherTransitionPrepare(mLauncher, false, false);
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mWorkspaceCurPage.setVisibility(View.VISIBLE);
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mAppsView.setSearchBarVisible(false);
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setLightStatusBar(false);
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}
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}
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mHotseat.setVisibility(View.VISIBLE);
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mHotseat.bringToFront();
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}
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private void setLightStatusBar(boolean enable) {
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int systemUiFlags = mLauncher.getWindow().getDecorView().getSystemUiVisibility();
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if (enable) {
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mLauncher.getWindow().getDecorView().setSystemUiVisibility(systemUiFlags
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| View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
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} else {
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mLauncher.getWindow().getDecorView().setSystemUiVisibility(systemUiFlags
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& ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
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}
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}
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private final Interpolator mAlphaInterpolator = new DecelerateInterpolator(.5f);
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@Override
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public boolean onScroll(float displacement, float velocity) {
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if (mAppsView == null) {
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return false; // early termination.
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}
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if (0 <= mCurY + displacement && mCurY + displacement < mTranslation) {
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setProgress(mCurY + displacement);
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}
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return true;
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}
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/**
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* @param progress y value of the border between hotseat and all apps
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*/
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public void setProgress(float progress) {
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mProgressTransY = progress;
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float alpha = calcAlphaAllApps(progress);
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float workspaceHotseatAlpha = Math.max(mHotseatAlpha, 1 - alpha);
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setTransAndAlpha(mAppsView, progress, Math.max(mHotseatAlpha, alpha));
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setTransAndAlpha(mWorkspaceCurPage, -mTranslation + progress, workspaceHotseatAlpha);
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setTransAndAlpha(mHotseat, -mTranslation + progress, workspaceHotseatAlpha);
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}
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public float getProgress() {
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return mProgressTransY;
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}
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private float calcAlphaAllApps(float progress) {
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return mAlphaInterpolator.getInterpolation((mTranslation - progress)/mTranslation);
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}
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private void setTransAndAlpha(View v, float transY, float alpha) {
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if (v != null) {
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v.setTranslationY(transY);
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v.setAlpha(alpha);
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}
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}
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@Override
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public void onScrollEnd(float velocity, boolean fling) {
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if (mAppsView == null) {
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return; // early termination.
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}
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if (fling) {
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if (velocity < 0) {
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calculateDuration(velocity, mAppsView.getTranslationY());
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showAppsView(); // Flinging in UP direction
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} else {
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calculateDuration(velocity, Math.abs(mTranslation - mAppsView.getTranslationY()));
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showWorkspace(); // Flinging in DOWN direction
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}
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// snap to top or bottom using the release velocity
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} else {
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if (mAppsView.getTranslationY() > mTranslation / 2) {
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calculateDuration(velocity, Math.abs(mTranslation - mAppsView.getTranslationY()));
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showWorkspace(); // Released in the bottom half
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} else {
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calculateDuration(velocity, Math.abs(mAppsView.getTranslationY()));
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showAppsView(); // Released in the top half
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}
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}
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}
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private void calculateDuration(float velocity, float disp) {
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// TODO: make these values constants after tuning.
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float velocityDivisor = Math.max(1, 0.75f * velocity);
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float travelDistance = Math.max(0.2f, disp / mTranslation);
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mAnimationDuration = Math.max(100, ANIMATION_DURATION / velocityDivisor * travelDistance);
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if (true) { // MERONG
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Log.d(TAG, String.format("calculateDuration=%f, v=%f, d=%f", mAnimationDuration, velocity, disp));
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}
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}
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/**
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* Depending on the current state of the launcher, either just
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* 1) animate
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* 2) animate and do all the state updates.
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*/
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private void showAppsView() {
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if (mLauncher.isAllAppsVisible()) {
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animateToAllApps(mCurrentAnimation);
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mCurrentAnimation.start();
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} else {
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mLauncher.showAppsView(true /* animated */, true /* resetListToTop */,
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true /* updatePredictedApps */, false /* focusSearchBar */);
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}
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}
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/**
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* Depending on the current state of the launcher, either just
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* 1) animate
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* 2) animate and do all the state updates.
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*/
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private void showWorkspace() {
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if (mLauncher.isAllAppsVisible()) {
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mLauncher.showWorkspace(true /* animated */);
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} else {
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animateToWorkspace(mCurrentAnimation);
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mCurrentAnimation.start();
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}
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}
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public void animateToAllApps(AnimatorSet animationOut) {
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if ((mAppsView = mLauncher.getAppsView()) == null || animationOut == null){
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return;
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}
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if (!mDetector.mScrolling) {
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preparePull(true);
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}
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mCurY = mAppsView.getTranslationY();
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final float fromAllAppsTop = mAppsView.getTranslationY();
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final float toAllAppsTop = 0;
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ObjectAnimator driftAndAlpha = ObjectAnimator.ofFloat(this, "progress",
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fromAllAppsTop, toAllAppsTop);
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driftAndAlpha.setDuration((long) mAnimationDuration);
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animationOut.play(driftAndAlpha);
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animationOut.addListener(new AnimatorListenerAdapter() {
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boolean canceled = false;
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@Override
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public void onAnimationCancel(Animator animation) {
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canceled = true;
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}
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@Override
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public void onAnimationEnd(Animator animation) {
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if (canceled) {
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return;
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} else {
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finishPullUp();
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cleanUpAnimation();
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mDetector.finishedScrolling();
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}
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}});
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mCurrentAnimation = animationOut;
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}
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private void finishPullUp() {
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mAppsView.setSearchBarVisible(true);
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mHotseat.setVisibility(View.INVISIBLE);
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setProgress(0f);
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setLightStatusBar(true);
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}
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public void animateToWorkspace(AnimatorSet animationOut) {
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if ((mAppsView = mLauncher.getAppsView()) == null || animationOut == null){
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return;
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}
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if(!mDetector.mScrolling) {
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preparePull(true);
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}
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final float fromAllAppsTop = mAppsView.getTranslationY();
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final float toAllAppsTop = mTranslation;
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ObjectAnimator driftAndAlpha = ObjectAnimator.ofFloat(this, "progress",
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fromAllAppsTop, toAllAppsTop);
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driftAndAlpha.setDuration((long) mAnimationDuration);
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animationOut.play(driftAndAlpha);
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animationOut.addListener(new AnimatorListenerAdapter() {
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boolean canceled = false;
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@Override
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public void onAnimationCancel(Animator animation) {
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canceled = true;
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}
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@Override
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public void onAnimationEnd(Animator animation) {
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if (canceled) {
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return;
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} else {
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finishPullDown();
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cleanUpAnimation();
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mDetector.finishedScrolling();
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}
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}});
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mCurrentAnimation = animationOut;
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}
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public void finishPullDown() {
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mAppsView.setVisibility(View.INVISIBLE);
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mHotseat.setBackground(mHotseatBackground);
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mHotseat.setVisibility(View.VISIBLE);
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setProgress(mTranslation);
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setLightStatusBar(false);
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}
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private void cancelAnimation() {
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if (mCurrentAnimation != null) {
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mCurrentAnimation.cancel();
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mCurrentAnimation = null;
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}
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}
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private void cleanUpAnimation() {
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mCurrentAnimation = null;
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}
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}
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