Merge "Add staggered springs animation when swiping up to home." into ub-launcher3-qt-dev

quickstep/recents_ui_overrides/res/values/dimens.xml

@@ -27,4 +27,5 @@
     <!-- Swipe up to home related -->
     <dimen name="swipe_up_fling_min_visible_change">18dp</dimen>
     <dimen name="swipe_up_y_overshoot">10dp</dimen>
+    <dimen name="swipe_up_max_workspace_trans_y">-80dp</dimen>
 </resources>

quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java

@@ -57,6 +57,7 @@ import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.launcher3.views.FloatingIconView;
 import com.android.quickstep.SysUINavigationMode.Mode;
 import com.android.quickstep.util.LayoutUtils;
+import com.android.quickstep.util.StaggeredWorkspaceAnim;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskView;
 import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
@@ -151,8 +152,21 @@ public final class LauncherActivityControllerHelper implements ActivityControlHe
             @NonNull
             @Override
             public AnimatorPlaybackController createActivityAnimationToHome() {
+                // Return an empty APC here since we have an non-user controlled animation to home.
                 long accuracy = 2 * Math.max(dp.widthPx, dp.heightPx);
-                return activity.getStateManager().createAnimationToNewWorkspace(NORMAL, accuracy);
+                AnimatorSet as = new AnimatorSet();
+                as.addListener(new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationStart(Animator animation) {
+                        activity.getStateManager().goToState(NORMAL, false);
+                    }
+                });
+                return AnimatorPlaybackController.wrap(as, accuracy);
+            }
+
+            @Override
+            public void playAtomicAnimation(float velocity) {
+                new StaggeredWorkspaceAnim(activity, workspaceView, velocity).start();
             }
         };
     }

quickstep/recents_ui_overrides/src/com/android/quickstep/WindowTransformSwipeHandler.java

@@ -1057,6 +1057,7 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity>
                     setStateOnUiThread(target.endState);
                 }
             });
+            homeAnimFactory.playAtomicAnimation(velocityPxPerMs.y);
             windowAnim.start(velocityPxPerMs);
             mRunningWindowAnim = RunningWindowAnim.wrap(windowAnim);
             mLauncherTransitionController = null;

quickstep/recents_ui_overrides/src/com/android/quickstep/util/StaggeredWorkspaceAnim.java

@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2019 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.quickstep.util;
+
+import android.animation.Animator;
+import android.animation.ObjectAnimator;
+import android.animation.ValueAnimator;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.Nullable;
+import androidx.dynamicanimation.animation.SpringForce;
+
+import com.android.launcher3.CellLayout;
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAnimUtils.ViewProgressProperty;
+import com.android.launcher3.R;
+import com.android.launcher3.ShortcutAndWidgetContainer;
+import com.android.launcher3.anim.SpringObjectAnimator;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.android.launcher3.anim.Interpolators.LINEAR;
+
+/**
+ * Creates an animation where all the workspace items are moved into their final location,
+ * staggered row by row from the bottom up.
+ * This is used in conjunction with the swipe up to home animation.
+ */
+public class StaggeredWorkspaceAnim {
+
+    private static final int APP_CLOSE_ROW_START_DELAY_MS = 16;
+    private static final int ALPHA_DURATION_MS = 200;
+
+    private static final float MAX_VELOCITY_PX_PER_S = 22f;
+
+    private static final float DAMPING_RATIO =
+            (SpringForce.DAMPING_RATIO_MEDIUM_BOUNCY + SpringForce.DAMPING_RATIO_LOW_BOUNCY) / 2f;
+    private static final float STIFFNESS = SpringForce.STIFFNESS_LOW;
+
+    private final float mVelocity;
+    private final float mSpringTransY;
+    private final View mViewToIgnore;
+
+    private final List<ValueAnimator> mAnimators = new ArrayList<>();
+
+    /**
+     * @param floatingViewOriginalView The FloatingIconView's original view.
+     */
+    public StaggeredWorkspaceAnim(Launcher launcher, @Nullable View floatingViewOriginalView,
+            float velocity) {
+        mVelocity = velocity;
+        // We ignore this view since it's visibility and position is controlled by
+        // the FloatingIconView.
+        mViewToIgnore = floatingViewOriginalView;
+
+        // Scale the translationY based on the initial velocity to better sync the workspace items
+        // with the floating view.
+        float transFactor = 0.1f + 0.9f * Math.abs(velocity) / MAX_VELOCITY_PX_PER_S;
+        mSpringTransY = transFactor * launcher.getResources()
+                .getDimensionPixelSize(R.dimen.swipe_up_max_workspace_trans_y);;
+
+        DeviceProfile grid = launcher.getDeviceProfile();
+        ShortcutAndWidgetContainer currentPage = ((CellLayout) launcher.getWorkspace()
+                .getChildAt(launcher.getWorkspace().getCurrentPage()))
+                .getShortcutsAndWidgets();
+
+        // Hotseat and QSB takes up two additional rows.
+        int totalRows = grid.inv.numRows + (grid.isVerticalBarLayout() ? 0 : 2);
+
+        // Set up springs on workspace items.
+        for (int i = currentPage.getChildCount() - 1; i >= 0; i--) {
+            View child = currentPage.getChildAt(i);
+            CellLayout.LayoutParams lp = ((CellLayout.LayoutParams) child.getLayoutParams());
+            addStaggeredAnimationForView(child, lp.cellY + lp.cellVSpan, totalRows);
+        }
+
+        // Set up springs for the hotseat and qsb.
+        if (grid.isVerticalBarLayout()) {
+            ViewGroup hotseat = (ViewGroup) launcher.getHotseat().getChildAt(0);
+            for (int i = hotseat.getChildCount() - 1; i >= 0; i--) {
+                View child = hotseat.getChildAt(i);
+                CellLayout.LayoutParams lp = ((CellLayout.LayoutParams) child.getLayoutParams());
+                addStaggeredAnimationForView(child, lp.cellY + 1, totalRows);
+            }
+        } else {
+            View hotseat = launcher.getHotseat().getChildAt(0);
+            addStaggeredAnimationForView(hotseat, grid.inv.numRows + 1, totalRows);
+
+            View qsb = launcher.findViewById(R.id.search_container_all_apps);
+            addStaggeredAnimationForView(qsb, grid.inv.numRows + 2, totalRows);
+        }
+    }
+
+    /**
+     * Starts the animation.
+     */
+    public void start() {
+        for (Animator a : mAnimators) {
+            if (a instanceof SpringObjectAnimator) {
+                ((SpringObjectAnimator) a).startSpring(1f, mVelocity, null);
+            } else {
+                a.start();
+            }
+        }
+    }
+
+    /**
+     * Adds an alpha/trans animator for {@param v}, with a start delay based on the view's row.
+     *
+     * @param v A view on the workspace.
+     * @param row The bottom-most row that contains the view.
+     * @param totalRows Total number of rows.
+     */
+    private void addStaggeredAnimationForView(View v, int row, int totalRows) {
+        if (v == mViewToIgnore) {
+            return;
+        }
+
+        // Invert the rows, because we stagger starting from the bottom of the screen.
+        int invertedRow = totalRows - row;
+        // Add 1 to the inverted row so that the bottom most row has a start delay.
+        long startDelay = (long) ((invertedRow + 1) * APP_CLOSE_ROW_START_DELAY_MS);
+
+        v.setTranslationY(mSpringTransY);
+        SpringObjectAnimator springTransY = new SpringObjectAnimator<>(
+                new ViewProgressProperty(v, View.TRANSLATION_Y), "staggeredSpringTransY", 1f,
+                DAMPING_RATIO, STIFFNESS, mSpringTransY, 0);
+        springTransY.setStartDelay(startDelay);
+        mAnimators.add(springTransY);
+
+        v.setAlpha(0);
+        ObjectAnimator alpha = ObjectAnimator.ofFloat(v, View.ALPHA, 0f, 1f);
+        alpha.setInterpolator(LINEAR);
+        alpha.setDuration(ALPHA_DURATION_MS);
+        alpha.setStartDelay(startDelay);
+        mAnimators.add(alpha);
+    }
+}

quickstep/src/com/android/quickstep/ActivityControlHelper.java

@@ -143,5 +143,9 @@ public interface ActivityControlHelper<T extends BaseDraggingActivity> {
         @NonNull RectF getWindowTargetRect();
 
         @NonNull AnimatorPlaybackController createActivityAnimationToHome();
+
+        default void playAtomicAnimation(float velocity) {
+            // No-op
+        }
     }
 }

src/com/android/launcher3/anim/SpringObjectAnimator.java

@@ -22,6 +22,8 @@ import android.animation.AnimatorListenerAdapter;
 import android.animation.ObjectAnimator;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
+import android.os.Handler;
+import android.os.Looper;
 import android.util.Log;
 import android.util.Property;
 
@@ -139,7 +141,7 @@ public class SpringObjectAnimator<T extends ProgressInterface> extends ValueAnim
     /**
      * Initializes and sets up the spring to take over controlling the object.
      */
-    void startSpring(float end, float velocity, OnAnimationEndListener endListener) {
+    public void startSpring(float end, float velocity, OnAnimationEndListener endListener) {
         // Cancel the spring so we can set new start velocity and final position. We need to remove
         // the listener since the spring is not actually ending.
         mSpring.removeEndListener(endListener);
@@ -149,7 +151,13 @@ public class SpringObjectAnimator<T extends ProgressInterface> extends ValueAnim
         mProperty.switchToSpring();
 
         mSpring.setStartVelocity(velocity);
-        mSpring.animateToFinalPosition(end == 0 ? mValues[0] : mValues[1]);
+
+        float startValue = end == 0 ? mValues[1] : mValues[0];
+        float endValue = end == 0 ? mValues[0] : mValues[1];
+        mSpring.setStartValue(startValue);
+        new Handler(Looper.getMainLooper()).postDelayed(() -> {
+            mSpring.animateToFinalPosition(endValue);
+        }, getStartDelay());
     }
 
     @Override