Rewrite long swipe resistance ("pullback") logic
- Rename "pullback" to "resistance" to reduce confusion.
- Remove mDragLengthFactorStartPullback & mDragLengthFactorMaxPullback
- Add AnimatorControllerWithResistance, which has 2 controllers, one
for the normal shift to overview, then one to apply the resistance
when swiping beyond that.
- Don't hack animator interpolators/progress; insteaad, allow progress
to go > 1 (which will run the separate resistance animator).
- Don't start launcher controller separately from window controller;
instead, both are controlled by mCurrentShift in updateFinalShift().
- The resistance animation logic is shared by both the active window
and launcher (RecentsView).
Bug: 149934536
Change-Id: Ib0f9da18e10cc9ddf1a2f82ed767f237c89d3a41
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
index 3a5c027..b6d44eb 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -23,7 +23,6 @@
import static com.android.launcher3.anim.Interpolators.LINEAR;
import static com.android.launcher3.anim.Interpolators.OVERSHOOT_1_2;
import static com.android.launcher3.config.FeatureFlags.ENABLE_QUICKSTEP_LIVE_TILE;
-import static com.android.launcher3.config.FeatureFlags.UNSTABLE_SPRINGS;
import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_BACKGROUND;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.IGNORE;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_HOME_GESTURE;
@@ -48,7 +47,6 @@
import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.ACTIVITY_TYPE_HOME;
import android.animation.Animator;
-import android.animation.TimeInterpolator;
import android.animation.ValueAnimator;
import android.annotation.TargetApi;
import android.app.ActivityManager;
@@ -75,7 +73,6 @@
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.AnimationSuccessListener;
-import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.anim.Interpolators;
import com.android.launcher3.logging.StatsLogManager;
import com.android.launcher3.logging.StatsLogManager.StatsLogger;
@@ -93,6 +90,7 @@
import com.android.quickstep.inputconsumers.OverviewInputConsumer;
import com.android.quickstep.util.ActiveGestureLog;
import com.android.quickstep.util.ActivityInitListener;
+import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.util.InputConsumerProxy;
import com.android.quickstep.util.RectFSpringAnim;
import com.android.quickstep.util.ShelfPeekAnim;
@@ -214,8 +212,7 @@
private ThumbnailData mTaskSnapshot;
// Used to control launcher components throughout the swipe gesture.
- private AnimatorPlaybackController mLauncherTransitionController;
- private boolean mHasLauncherTransitionControllerStarted;
+ private AnimatorControllerWithResistance mLauncherTransitionController;
private AnimationFactory mAnimationFactory = (t) -> { };
@@ -564,11 +561,11 @@
/**
* We don't want to change mLauncherTransitionController if mGestureState.getEndTarget() == HOME
- * (it has its own animation) or if we're already animating the current controller.
+ * (it has its own animation).
* @return Whether we can create the launcher controller or update its progress.
*/
private boolean canCreateNewOrUpdateExistingLauncherTransitionController() {
- return mGestureState.getEndTarget() != HOME && !mHasLauncherTransitionControllerStarted;
+ return mGestureState.getEndTarget() != HOME;
}
@Override
@@ -578,10 +575,9 @@
return result;
}
- private void onAnimatorPlaybackControllerCreated(AnimatorPlaybackController anim) {
+ private void onAnimatorPlaybackControllerCreated(AnimatorControllerWithResistance anim) {
mLauncherTransitionController = anim;
- mLauncherTransitionController.dispatchSetInterpolator(t -> t * mDragLengthFactor);
- mLauncherTransitionController.dispatchOnStart();
+ mLauncherTransitionController.getNormalController().dispatchOnStart();
updateLauncherTransitionProgress();
}
@@ -621,10 +617,7 @@
|| !canCreateNewOrUpdateExistingLauncherTransitionController()) {
return;
}
- // Normalize the progress to 0 to 1, as the animation controller will clamp it to that
- // anyway. The controller mimics the drag length factor by applying it to its interpolators.
- float progress = mCurrentShift.value / mDragLengthFactor;
- mLauncherTransitionController.setPlayFraction(progress);
+ mLauncherTransitionController.setProgress(mCurrentShift.value, mDragLengthFactor);
}
/**
@@ -1112,31 +1105,6 @@
windowAnim.start();
mRunningWindowAnim = RunningWindowAnim.wrap(windowAnim);
}
- // Always play the entire launcher animation when going home, since it is separate from
- // the animation that has been controlled thus far.
- if (mGestureState.getEndTarget() == HOME) {
- start = 0;
- }
-
- // We want to use the same interpolator as the window, but need to adjust it to
- // interpolate over the remaining progress (end - start).
- TimeInterpolator adjustedInterpolator = Interpolators.mapToProgress(
- interpolator, start, end);
- if (mLauncherTransitionController == null) {
- return;
- }
- if (start == end || duration <= 0) {
- mLauncherTransitionController.dispatchSetInterpolator(t -> end);
- } else {
- mLauncherTransitionController.dispatchSetInterpolator(adjustedInterpolator);
- }
- mLauncherTransitionController.getAnimationPlayer().setDuration(Math.max(0, duration));
-
- if (UNSTABLE_SPRINGS.get()) {
- mLauncherTransitionController.dispatchOnStart();
- }
- mLauncherTransitionController.getAnimationPlayer().start();
- mHasLauncherTransitionControllerStarted = true;
}
private void computeRecentsScrollIfInvisible() {
@@ -1261,10 +1229,6 @@
private void cancelCurrentAnimation() {
mCanceled = true;
mCurrentShift.cancelAnimation();
- if (mLauncherTransitionController != null && mLauncherTransitionController
- .getAnimationPlayer().isStarted()) {
- mLauncherTransitionController.getAnimationPlayer().cancel();
- }
}
private void invalidateHandler() {
@@ -1290,7 +1254,10 @@
private void endLauncherTransitionController() {
setShelfState(ShelfAnimState.CANCEL, LINEAR, 0);
if (mLauncherTransitionController != null) {
- mLauncherTransitionController.getAnimationPlayer().end();
+ // End the animation, but stay at the same visual progress.
+ mLauncherTransitionController.getNormalController().dispatchSetInterpolator(
+ t -> Utilities.boundToRange(mCurrentShift.value, 0, 1));
+ mLauncherTransitionController.getNormalController().getAnimationPlayer().end();
mLauncherTransitionController = null;
}
}
@@ -1572,8 +1539,7 @@
*/
protected void applyWindowTransform() {
if (mWindowTransitionController != null) {
- float progress = mCurrentShift.value / mDragLengthFactor;
- mWindowTransitionController.setPlayFraction(progress);
+ mWindowTransitionController.setProgress(mCurrentShift.value, mDragLengthFactor);
}
if (mRecentsAnimationTargets != null) {
if (mRecentsViewScrollLinked) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/AppToOverviewAnimationProvider.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/AppToOverviewAnimationProvider.java
index 9310685..55f5424 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/AppToOverviewAnimationProvider.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/AppToOverviewAnimationProvider.java
@@ -79,8 +79,8 @@
BaseActivityInterface.AnimationFactory factory = mActivityInterface.prepareRecentsUI(
mDeviceState,
wasVisible, (controller) -> {
- controller.dispatchOnStart();
- controller.getAnimationPlayer().end();
+ controller.getNormalController().dispatchOnStart();
+ controller.getNormalController().getAnimationPlayer().end();
});
factory.createActivityInterface(RECENTS_LAUNCH_DURATION);
factory.setRecentsAttachedToAppWindow(true, false);
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityInterface.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityInterface.java
index d1da0c1..3898f0b 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityInterface.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityInterface.java
@@ -27,11 +27,11 @@
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.R;
-import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.touch.PagedOrientationHandler;
import com.android.launcher3.userevent.nano.LauncherLogProto;
import com.android.quickstep.fallback.RecentsState;
import com.android.quickstep.util.ActivityInitListener;
+import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.views.RecentsView;
import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
@@ -84,7 +84,7 @@
/** 6 */
@Override
public AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
- boolean activityVisible, Consumer<AnimatorPlaybackController> callback) {
+ boolean activityVisible, Consumer<AnimatorControllerWithResistance> callback) {
DefaultAnimationFactory factory = new DefaultAnimationFactory(callback);
factory.initUI();
return factory;
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
index 5a35eb5..4e38f49 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
@@ -39,7 +39,6 @@
import com.android.launcher3.LauncherState;
import com.android.launcher3.R;
import com.android.launcher3.allapps.DiscoveryBounce;
-import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.statehandlers.DepthController;
import com.android.launcher3.statehandlers.DepthController.ClampedDepthProperty;
@@ -49,6 +48,7 @@
import com.android.launcher3.userevent.nano.LauncherLogProto;
import com.android.quickstep.SysUINavigationMode.Mode;
import com.android.quickstep.util.ActivityInitListener;
+import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.util.LayoutUtils;
import com.android.quickstep.util.ShelfPeekAnim.ShelfAnimState;
import com.android.quickstep.views.RecentsView;
@@ -118,7 +118,7 @@
@Override
public AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
- boolean activityVisible, Consumer<AnimatorPlaybackController> callback) {
+ boolean activityVisible, Consumer<AnimatorControllerWithResistance> callback) {
notifyRecentsOfOrientation(deviceState.getRotationTouchHelper());
DefaultAnimationFactory factory = new DefaultAnimationFactory(callback) {
@Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
index e54a21c..137f809 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
@@ -16,7 +16,7 @@
package com.android.quickstep;
import static com.android.launcher3.anim.Interpolators.ACCEL_1_5;
-import static com.android.launcher3.anim.Interpolators.DEACCEL;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
import android.animation.Animator;
import android.content.Context;
@@ -24,7 +24,6 @@
import android.graphics.Matrix.ScaleToFit;
import android.graphics.Rect;
import android.graphics.RectF;
-import android.view.animation.Interpolator;
import androidx.annotation.NonNull;
import androidx.annotation.UiThread;
@@ -35,6 +34,7 @@
import com.android.launcher3.anim.AnimatorPlaybackController;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.touch.PagedOrientationHandler;
+import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.util.RectFSpringAnim;
import com.android.quickstep.util.TaskViewSimulator;
import com.android.quickstep.util.TransformParams;
@@ -45,7 +45,6 @@
public abstract class SwipeUpAnimationLogic {
protected static final Rect TEMP_RECT = new Rect();
- private static final Interpolator PULLBACK_INTERPOLATOR = DEACCEL;
protected DeviceProfile mDp;
@@ -66,12 +65,8 @@
protected int mTransitionDragLength;
// How much further we can drag past recents, as a factor of mTransitionDragLength.
protected float mDragLengthFactor = 1;
- // Start resisting when swiping past this factor of mTransitionDragLength.
- private float mDragLengthFactorStartPullback = 1f;
- // This is how far down we can scale down, where 0f is full screen and 1f is recents.
- private float mDragLengthFactorMaxPullback = 1f;
- protected AnimatorPlaybackController mWindowTransitionController;
+ protected AnimatorControllerWithResistance mWindowTransitionController;
public SwipeUpAnimationLogic(Context context, RecentsAnimationDeviceState deviceState,
GestureState gestureState, TransformParams transformParams) {
@@ -97,19 +92,16 @@
if (mDeviceState.isFullyGesturalNavMode()) {
// We can drag all the way to the top of the screen.
mDragLengthFactor = (float) dp.heightPx / mTransitionDragLength;
-
- float startScale = mTaskViewSimulator.getFullScreenScale();
- // Start pulling back when RecentsView scale is 0.75f, and let it go down to 0.5f.
- mDragLengthFactorStartPullback = (0.75f - startScale) / (1 - startScale);
- mDragLengthFactorMaxPullback = (0.5f - startScale) / (1 - startScale);
} else {
- mDragLengthFactor = 1;
- mDragLengthFactorStartPullback = mDragLengthFactorMaxPullback = 1;
+ mDragLengthFactor = 1 + AnimatorControllerWithResistance.TWO_BUTTON_EXTRA_DRAG_FACTOR;
}
PendingAnimation pa = new PendingAnimation(mTransitionDragLength * 2);
- mTaskViewSimulator.addAppToOverviewAnim(pa, t -> t * mDragLengthFactor);
- mWindowTransitionController = pa.createPlaybackController();
+ mTaskViewSimulator.addAppToOverviewAnim(pa, LINEAR);
+ AnimatorPlaybackController normalController = pa.createPlaybackController();
+ mWindowTransitionController = AnimatorControllerWithResistance.createForRecents(
+ normalController, mContext, mTaskViewSimulator.getOrientationState(),
+ mDp, mTaskViewSimulator.recentsViewScale, AnimatedFloat.VALUE);
}
@UiThread
@@ -122,13 +114,6 @@
} else {
float translation = Math.max(displacement, 0);
shift = mTransitionDragLength == 0 ? 0 : translation / mTransitionDragLength;
- if (shift > mDragLengthFactorStartPullback) {
- float pullbackProgress = Utilities.getProgress(shift,
- mDragLengthFactorStartPullback, mDragLengthFactor);
- pullbackProgress = PULLBACK_INTERPOLATOR.getInterpolation(pullbackProgress);
- shift = mDragLengthFactorStartPullback + pullbackProgress
- * (mDragLengthFactorMaxPullback - mDragLengthFactorStartPullback);
- }
}
mCurrentShift.updateValue(shift);
@@ -183,7 +168,7 @@
HomeAnimationFactory homeAnimationFactory) {
final RectF targetRect = homeAnimationFactory.getWindowTargetRect();
- mWindowTransitionController.setPlayFraction(startProgress / mDragLengthFactor);
+ mCurrentShift.updateValue(startProgress);
mTaskViewSimulator.apply(mTransformParams.setProgress(startProgress));
RectF cropRectF = new RectF(mTaskViewSimulator.getCurrentCropRect());
diff --git a/quickstep/src/com/android/quickstep/BaseActivityInterface.java b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
index 9dc2132..a9a4e95 100644
--- a/quickstep/src/com/android/quickstep/BaseActivityInterface.java
+++ b/quickstep/src/com/android/quickstep/BaseActivityInterface.java
@@ -52,6 +52,7 @@
import com.android.launcher3.util.WindowBounds;
import com.android.quickstep.SysUINavigationMode.Mode;
import com.android.quickstep.util.ActivityInitListener;
+import com.android.quickstep.util.AnimatorControllerWithResistance;
import com.android.quickstep.util.ShelfPeekAnim;
import com.android.quickstep.util.SplitScreenBounds;
import com.android.quickstep.views.RecentsView;
@@ -106,7 +107,7 @@
public abstract void onAssistantVisibilityChanged(float visibility);
public abstract AnimationFactory prepareRecentsUI(RecentsAnimationDeviceState deviceState,
- boolean activityVisible, Consumer<AnimatorPlaybackController> callback);
+ boolean activityVisible, Consumer<AnimatorControllerWithResistance> callback);
public abstract ActivityInitListener createActivityInitListener(
Predicate<Boolean> onInitListener);
@@ -312,11 +313,11 @@
protected final ACTIVITY_TYPE mActivity;
private final STATE_TYPE mStartState;
- private final Consumer<AnimatorPlaybackController> mCallback;
+ private final Consumer<AnimatorControllerWithResistance> mCallback;
private boolean mIsAttachedToWindow;
- DefaultAnimationFactory(Consumer<AnimatorPlaybackController> callback) {
+ DefaultAnimationFactory(Consumer<AnimatorControllerWithResistance> callback) {
mCallback = callback;
mActivity = getCreatedActivity();
@@ -344,7 +345,13 @@
controller.setEndAction(() -> mActivity.getStateManager().goToState(
controller.getInterpolatedProgress() > 0.5 ? mOverviewState : mBackgroundState,
false));
- mCallback.accept(controller);
+
+ RecentsView recentsView = mActivity.getOverviewPanel();
+ AnimatorControllerWithResistance controllerWithResistance =
+ AnimatorControllerWithResistance.createForRecents(controller, mActivity,
+ recentsView.getPagedViewOrientedState(), mActivity.getDeviceProfile(),
+ recentsView, RECENTS_SCALE_PROPERTY);
+ mCallback.accept(controllerWithResistance);
// Creating the activity controller animation sometimes reapplies the launcher state
// (because we set the animation as the current state animation), so we reapply the
diff --git a/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java
index 044e010..60d8ef6 100644
--- a/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/SwipeUpGestureTutorialController.java
@@ -184,8 +184,7 @@
@Override
public void updateFinalShift() {
- float progress = mCurrentShift.value / mDragLengthFactor;
- mWindowTransitionController.setPlayFraction(progress);
+ mWindowTransitionController.setProgress(mCurrentShift.value, mDragLengthFactor);
mTaskViewSimulator.apply(mTransformParams);
}
diff --git a/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java b/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java
new file mode 100644
index 0000000..d58329a
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/util/AnimatorControllerWithResistance.java
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2020 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 static com.android.launcher3.anim.Interpolators.DEACCEL;
+import static com.android.launcher3.anim.Interpolators.LINEAR;
+import static com.android.quickstep.SysUINavigationMode.Mode.TWO_BUTTONS;
+
+import android.animation.TimeInterpolator;
+import android.content.Context;
+import android.graphics.PointF;
+import android.graphics.Rect;
+import android.util.FloatProperty;
+
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.AnimatorPlaybackController;
+import com.android.launcher3.anim.PendingAnimation;
+import com.android.quickstep.LauncherActivityInterface;
+import com.android.quickstep.SysUINavigationMode;
+
+/**
+ * Controls an animation that can go beyond progress = 1, at which point resistance should be
+ * applied. Internally, this is a wrapper around 2 {@link AnimatorPlaybackController}s, one that
+ * runs from progress 0 to 1 like normal, then one that seamlessly continues that animation but
+ * starts applying resistance as well.
+ */
+public class AnimatorControllerWithResistance {
+
+ /**
+ * How much farther we can drag past overview in 2-button mode, as a factor of the distance
+ * it takes to drag from an app to overview.
+ */
+ public static final float TWO_BUTTON_EXTRA_DRAG_FACTOR = 0.25f;
+
+ /**
+ * Start slowing down the rate of scaling down when recents view is smaller than this scale.
+ */
+ private static final float RECENTS_SCALE_START_RESIST = 0.75f;
+
+ /**
+ * Recents view will reach this scale at the very end of the drag.
+ */
+ private static final float RECENTS_SCALE_MAX_RESIST = 0.5f;
+
+ private static final TimeInterpolator RECENTS_SCALE_RESIST_INTERPOLATOR = DEACCEL;
+
+ private final AnimatorPlaybackController mNormalController;
+ private final AnimatorPlaybackController mResistanceController;
+
+ // Initialize to -1 so the first 0 gets applied.
+ private float mLastNormalProgress = -1;
+ private float mLastResistProgress;
+
+ public AnimatorControllerWithResistance(AnimatorPlaybackController normalController,
+ AnimatorPlaybackController resistanceController) {
+ mNormalController = normalController;
+ mResistanceController = resistanceController;
+ }
+
+ public AnimatorPlaybackController getNormalController() {
+ return mNormalController;
+ }
+
+ /**
+ * Applies the current progress of the animation.
+ * @param progress From 0 to maxProgress, where 1 is the target we are animating towards.
+ * @param maxProgress > 1, this is where the resistance will be applied.
+ */
+ public void setProgress(float progress, float maxProgress) {
+ float normalProgress = Utilities.boundToRange(progress, 0, 1);
+ if (normalProgress != mLastNormalProgress) {
+ mLastNormalProgress = normalProgress;
+ mNormalController.setPlayFraction(normalProgress);
+ }
+ if (maxProgress <= 1) {
+ return;
+ }
+ float resistProgress = progress <= 1 ? 0 : Utilities.getProgress(progress, 1, maxProgress);
+ if (resistProgress != mLastResistProgress) {
+ mLastResistProgress = resistProgress;
+ mResistanceController.setPlayFraction(resistProgress);
+ }
+ }
+
+ /**
+ * Applies resistance to recents when swiping up past its target position.
+ * @param normalController The controller to run from 0 to 1 before this resistance applies.
+ * @param context Used to compute start and end values.
+ * @param recentsOrientedState Used to compute start and end values.
+ * @param dp Used to compute start and end values.
+ * @param scaleTarget The target for the scaleProperty.
+ * @param scaleProperty Animate the value to change the scale of the window/recents view.
+ */
+ public static <SCALE> AnimatorControllerWithResistance createForRecents(
+ AnimatorPlaybackController normalController, Context context,
+ RecentsOrientedState recentsOrientedState, DeviceProfile dp, SCALE scaleTarget,
+ FloatProperty<SCALE> scaleProperty) {
+ Rect startRect = new Rect();
+ LauncherActivityInterface.INSTANCE.calculateTaskSize(context, dp, startRect,
+ recentsOrientedState.getOrientationHandler());
+ long distanceToCover = startRect.bottom;
+ boolean isTwoButtonMode = SysUINavigationMode.getMode(context) == TWO_BUTTONS;
+ if (isTwoButtonMode) {
+ // We can only drag a small distance past overview, not to the top of the screen.
+ distanceToCover = (long)
+ ((dp.heightPx - startRect.bottom) * TWO_BUTTON_EXTRA_DRAG_FACTOR);
+ }
+ PendingAnimation resistAnim = new PendingAnimation(distanceToCover * 2);
+
+ PointF pivot = new PointF();
+ float fullscreenScale = recentsOrientedState.getFullScreenScaleAndPivot(
+ startRect, dp, pivot);
+ float startScale = 1;
+ float prevScaleRate = (fullscreenScale - startScale) / (dp.heightPx - startRect.bottom);
+ // This is what the scale would be at the end of the drag if we didn't apply resistance.
+ float endScale = startScale - prevScaleRate * distanceToCover;
+ final TimeInterpolator scaleInterpolator;
+ if (isTwoButtonMode) {
+ // We are bounded by the distance of the drag, so we don't need to apply resistance.
+ scaleInterpolator = LINEAR;
+ } else {
+ // Create an interpolator that resists the scale so the scale doesn't get smaller than
+ // RECENTS_SCALE_MAX_RESIST.
+ float startResist = Utilities.getProgress(RECENTS_SCALE_START_RESIST, startScale,
+ endScale);
+ float maxResist = Utilities.getProgress(RECENTS_SCALE_MAX_RESIST, startScale, endScale);
+ scaleInterpolator = t -> {
+ if (t < startResist) {
+ return t;
+ }
+ float resistProgress = Utilities.getProgress(t, startResist, 1);
+ resistProgress = RECENTS_SCALE_RESIST_INTERPOLATOR.getInterpolation(resistProgress);
+ return startResist + resistProgress * (maxResist - startResist);
+ };
+ }
+ resistAnim.addFloat(scaleTarget, scaleProperty, startScale, endScale,
+ scaleInterpolator);
+
+ AnimatorPlaybackController resistanceController = resistAnim.createPlaybackController();
+ return new AnimatorControllerWithResistance(normalController, resistanceController);
+ }
+
+}
diff --git a/src/com/android/launcher3/anim/Interpolators.java b/src/com/android/launcher3/anim/Interpolators.java
index 860cceb..6ad43ea 100644
--- a/src/com/android/launcher3/anim/Interpolators.java
+++ b/src/com/android/launcher3/anim/Interpolators.java
@@ -198,6 +198,7 @@
public OvershootParams(float startProgress, float overshootPastProgress,
float endProgress, float velocityPxPerMs, int totalDistancePx, Context context) {
velocityPxPerMs = Math.abs(velocityPxPerMs);
+ overshootPastProgress = Math.max(overshootPastProgress, startProgress);
start = startProgress;
int startPx = (int) (start * totalDistancePx);
// Overshoot by about half a frame.
