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Lawnchair/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
T
Adam Cohen 501e139c6e Draw the workspace scrim in the LauncherRootView instead of DragLayer 
=> The entire DragLayer is translated during the -1 transition which creates a janky looking edge at the top of the screen

=> By bumping the scrim up a level, we avoid this

=> Separated WorkspaceAndHotseatScrim into two separate scrims, since only part of the scrim needed to be bumped up to a level. Further, it was an overloaded class.

=> We had previously been implicitly relying on the fact that the scrim was rendered in the Workspace parent; we need to make sure to propagate workspace inavlidations to the container of the scrim. While things would still work without this change, it's more correct to leave it, as we no longer assume a hierarchy for functinoality.

Bug: 178215332

Test: manual verification. See video in bug.

Change-Id: I0a76ddf35ceea8c9635367f69380ef24f42e9479
2021-02-10 19:16:26 +00:00

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/*
* 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;
import static androidx.dynamicanimation.animation.DynamicAnimation.MIN_VISIBLE_CHANGE_SCALE;
import static com.android.launcher3.LauncherAnimUtils.DRAWABLE_ALPHA;
import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.LauncherAnimUtils.VIEW_ALPHA;
import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_X;
import static com.android.launcher3.LauncherAnimUtils.VIEW_TRANSLATE_Y;
import static com.android.launcher3.LauncherState.FLAG_HAS_SYS_UI_SCRIM;
import static com.android.launcher3.LauncherState.FLAG_WORKSPACE_HAS_BACKGROUNDS;
import static com.android.launcher3.LauncherState.HINT_STATE;
import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.anim.Interpolators.LINEAR;
import static com.android.launcher3.anim.Interpolators.ZOOM_OUT;
import static com.android.launcher3.anim.PropertySetter.NO_ANIM_PROPERTY_SETTER;
import static com.android.launcher3.graphics.Scrim.SCRIM_PROGRESS;
import static com.android.launcher3.graphics.SysUiScrim.SYSUI_PROGRESS;
import static com.android.launcher3.states.StateAnimationConfig.ANIM_HOTSEAT_SCALE;
import static com.android.launcher3.states.StateAnimationConfig.ANIM_HOTSEAT_TRANSLATE;
import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_FADE;
import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_SCALE;
import static com.android.launcher3.states.StateAnimationConfig.ANIM_WORKSPACE_TRANSLATE;
import android.animation.ValueAnimator;
import android.view.View;
import android.view.animation.Interpolator;
import com.android.launcher3.LauncherState.PageAlphaProvider;
import com.android.launcher3.LauncherState.ScaleAndTranslation;
import com.android.launcher3.allapps.AllAppsContainerView;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.anim.PropertySetter;
import com.android.launcher3.anim.SpringAnimationBuilder;
import com.android.launcher3.graphics.SysUiScrim;
import com.android.launcher3.graphics.WorkspaceDragScrim;
import com.android.launcher3.states.StateAnimationConfig;
import com.android.launcher3.util.DynamicResource;
import com.android.systemui.plugins.ResourceProvider;
/**
* Manages the animations between each of the workspace states.
*/
public class WorkspaceStateTransitionAnimation {
private final Launcher mLauncher;
private final Workspace mWorkspace;
private float mNewScale;
public WorkspaceStateTransitionAnimation(Launcher launcher, Workspace workspace) {
mLauncher = launcher;
mWorkspace = workspace;
}
public void setState(LauncherState toState) {
setWorkspaceProperty(toState, NO_ANIM_PROPERTY_SETTER, new StateAnimationConfig());
}
/**
* @see com.android.launcher3.statemanager.StateManager.StateHandler#setStateWithAnimation
*/
public void setStateWithAnimation(
LauncherState toState, StateAnimationConfig config, PendingAnimation animation) {
setWorkspaceProperty(toState, animation, config);
}
public float getFinalScale() {
return mNewScale;
}
/**
* Starts a transition animation for the workspace.
*/
private void setWorkspaceProperty(LauncherState state, PropertySetter propertySetter,
StateAnimationConfig config) {
ScaleAndTranslation scaleAndTranslation = state.getWorkspaceScaleAndTranslation(mLauncher);
ScaleAndTranslation hotseatScaleAndTranslation = state.getHotseatScaleAndTranslation(
mLauncher);
ScaleAndTranslation qsbScaleAndTranslation = state.getQsbScaleAndTranslation(mLauncher);
mNewScale = scaleAndTranslation.scale;
PageAlphaProvider pageAlphaProvider = state.getWorkspacePageAlphaProvider(mLauncher);
final int childCount = mWorkspace.getChildCount();
for (int i = 0; i < childCount; i++) {
applyChildState(state, (CellLayout) mWorkspace.getChildAt(i), i, pageAlphaProvider,
propertySetter, config);
}
int elements = state.getVisibleElements(mLauncher);
Interpolator fadeInterpolator = config.getInterpolator(ANIM_WORKSPACE_FADE,
pageAlphaProvider.interpolator);
boolean playAtomicComponent = config.playAtomicOverviewScaleComponent();
Hotseat hotseat = mWorkspace.getHotseat();
// Since we set the pivot relative to mWorkspace, we need to scale a sibling of Workspace.
AllAppsContainerView qsbScaleView = mLauncher.getAppsView();
View qsbView = qsbScaleView.getSearchView();
if (playAtomicComponent) {
Interpolator scaleInterpolator = config.getInterpolator(ANIM_WORKSPACE_SCALE, ZOOM_OUT);
LauncherState fromState = mLauncher.getStateManager().getState();
boolean shouldSpring = propertySetter instanceof PendingAnimation
&& fromState == HINT_STATE && state == NORMAL;
if (shouldSpring) {
((PendingAnimation) propertySetter).add(getSpringScaleAnimator(mLauncher,
mWorkspace, mNewScale));
} else {
propertySetter.setFloat(mWorkspace, SCALE_PROPERTY, mNewScale, scaleInterpolator);
}
setPivotToScaleWithWorkspace(hotseat);
setPivotToScaleWithWorkspace(qsbScaleView);
float hotseatScale = hotseatScaleAndTranslation.scale;
if (shouldSpring) {
PendingAnimation pa = (PendingAnimation) propertySetter;
pa.add(getSpringScaleAnimator(mLauncher, hotseat, hotseatScale));
pa.add(getSpringScaleAnimator(mLauncher, qsbScaleView,
qsbScaleAndTranslation.scale));
} else {
Interpolator hotseatScaleInterpolator = config.getInterpolator(ANIM_HOTSEAT_SCALE,
scaleInterpolator);
propertySetter.setFloat(hotseat, SCALE_PROPERTY, hotseatScale,
hotseatScaleInterpolator);
propertySetter.setFloat(qsbScaleView, SCALE_PROPERTY, qsbScaleAndTranslation.scale,
hotseatScaleInterpolator);
}
float hotseatIconsAlpha = (elements & HOTSEAT_ICONS) != 0 ? 1 : 0;
propertySetter.setViewAlpha(hotseat, hotseatIconsAlpha, fadeInterpolator);
propertySetter.setViewAlpha(mLauncher.getWorkspace().getPageIndicator(),
hotseatIconsAlpha, fadeInterpolator);
}
if (config.onlyPlayAtomicComponent()) {
// Only the alpha and scale, handled above, are included in the atomic animation.
return;
}
Interpolator translationInterpolator = !playAtomicComponent
? LINEAR
: config.getInterpolator(ANIM_WORKSPACE_TRANSLATE, ZOOM_OUT);
propertySetter.setFloat(mWorkspace, VIEW_TRANSLATE_X,
scaleAndTranslation.translationX, translationInterpolator);
propertySetter.setFloat(mWorkspace, VIEW_TRANSLATE_Y,
scaleAndTranslation.translationY, translationInterpolator);
Interpolator hotseatTranslationInterpolator = config.getInterpolator(
ANIM_HOTSEAT_TRANSLATE, translationInterpolator);
propertySetter.setFloat(hotseat, VIEW_TRANSLATE_Y,
hotseatScaleAndTranslation.translationY, hotseatTranslationInterpolator);
propertySetter.setFloat(mWorkspace.getPageIndicator(), VIEW_TRANSLATE_Y,
hotseatScaleAndTranslation.translationY, hotseatTranslationInterpolator);
propertySetter.setFloat(qsbView, VIEW_TRANSLATE_Y,
qsbScaleAndTranslation.translationY, hotseatTranslationInterpolator);
setScrim(propertySetter, state);
}
/**
* Set the given view's pivot point to match the workspace's, so that it scales together. Since
* both this view and workspace can move, transform the point manually instead of using
* dragLayer.getDescendantCoordRelativeToSelf and related methods.
*/
private void setPivotToScaleWithWorkspace(View sibling) {
sibling.setPivotY(mWorkspace.getPivotY() + mWorkspace.getTop()
- sibling.getTop() - sibling.getTranslationY());
sibling.setPivotX(mWorkspace.getPivotX() + mWorkspace.getLeft()
- sibling.getLeft() - sibling.getTranslationX());
}
public void setScrim(PropertySetter propertySetter, LauncherState state) {
WorkspaceDragScrim workspaceDragScrim = mLauncher.getDragLayer().getWorkspaceDragScrim();
propertySetter.setFloat(workspaceDragScrim, SCRIM_PROGRESS,
state.getWorkspaceScrimAlpha(mLauncher), LINEAR);
SysUiScrim sysUiScrim = mLauncher.getDragLayer().getSysUiScrim();
propertySetter.setFloat(sysUiScrim, SYSUI_PROGRESS,
state.hasFlag(FLAG_HAS_SYS_UI_SCRIM) ? 1 : 0, LINEAR);
}
public void applyChildState(LauncherState state, CellLayout cl, int childIndex) {
applyChildState(state, cl, childIndex, state.getWorkspacePageAlphaProvider(mLauncher),
NO_ANIM_PROPERTY_SETTER, new StateAnimationConfig());
}
private void applyChildState(LauncherState state, CellLayout cl, int childIndex,
PageAlphaProvider pageAlphaProvider, PropertySetter propertySetter,
StateAnimationConfig config) {
float pageAlpha = pageAlphaProvider.getPageAlpha(childIndex);
int drawableAlpha = state.hasFlag(FLAG_WORKSPACE_HAS_BACKGROUNDS)
? Math.round(pageAlpha * 255) : 0;
if (!config.onlyPlayAtomicComponent()) {
// Don't update the scrim during the atomic animation.
propertySetter.setInt(cl.getScrimBackground(),
DRAWABLE_ALPHA, drawableAlpha, ZOOM_OUT);
}
if (config.playAtomicOverviewScaleComponent()) {
Interpolator fadeInterpolator = config.getInterpolator(ANIM_WORKSPACE_FADE,
pageAlphaProvider.interpolator);
propertySetter.setFloat(cl.getShortcutsAndWidgets(), VIEW_ALPHA,
pageAlpha, fadeInterpolator);
}
}
/**
* Returns a spring based animator for the scale property of {@param v}.
*/
public static ValueAnimator getSpringScaleAnimator(Launcher launcher, View v, float scale) {
ResourceProvider rp = DynamicResource.provider(launcher);
float damping = rp.getFloat(R.dimen.hint_scale_damping_ratio);
float stiffness = rp.getFloat(R.dimen.hint_scale_stiffness);
float velocityPxPerS = rp.getDimension(R.dimen.hint_scale_velocity_dp_per_s);
return new SpringAnimationBuilder(v.getContext())
.setStiffness(stiffness)
.setDampingRatio(damping)
.setMinimumVisibleChange(MIN_VISIBLE_CHANGE_SCALE)
.setEndValue(scale)
.setStartValue(SCALE_PROPERTY.get(v))
.setStartVelocity(velocityPxPerS)
.build(v, SCALE_PROPERTY);
}
}
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