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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.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.HINT_STATE;
import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.LauncherState.WORKSPACE_PAGE_INDICATOR;
import static com.android.launcher3.anim.Interpolators.ACCEL_2;
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_SCRIM_FADE;
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 static com.android.launcher3.states.StateAnimationConfig.SKIP_SCRIM;
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.anim.PendingAnimation;
import com.android.launcher3.anim.PropertySetter;
import com.android.launcher3.anim.SpringAnimationBuilder;
import com.android.launcher3.graphics.Scrim;
import com.android.launcher3.graphics.SysUiScrim;
import com.android.launcher3.states.SpringLoadedState;
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);
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);
Hotseat hotseat = mWorkspace.getHotseat();
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);
}
mWorkspace.setPivotToScaleWithSelf(hotseat);
float hotseatScale = hotseatScaleAndTranslation.scale;
if (shouldSpring) {
PendingAnimation pa = (PendingAnimation) propertySetter;
pa.add(getSpringScaleAnimator(mLauncher, hotseat, hotseatScale));
} else {
Interpolator hotseatScaleInterpolator = config.getInterpolator(ANIM_HOTSEAT_SCALE,
scaleInterpolator);
propertySetter.setFloat(hotseat, SCALE_PROPERTY, hotseatScale,
hotseatScaleInterpolator);
}
float hotseatIconsAlpha = (elements & HOTSEAT_ICONS) != 0 ? 1 : 0;
propertySetter.setViewAlpha(hotseat, hotseatIconsAlpha, fadeInterpolator);
float workspacePageIndicatorAlpha = (elements & WORKSPACE_PAGE_INDICATOR) != 0 ? 1 : 0;
propertySetter.setViewAlpha(mLauncher.getWorkspace().getPageIndicator(),
workspacePageIndicatorAlpha, fadeInterpolator);
Interpolator translationInterpolator =
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);
if (!config.hasAnimationFlag(SKIP_SCRIM)) {
setScrim(propertySetter, state, config);
}
}
public void setScrim(PropertySetter propertySetter, LauncherState state,
StateAnimationConfig config) {
Scrim workspaceDragScrim = mLauncher.getDragLayer().getWorkspaceDragScrim();
propertySetter.setFloat(workspaceDragScrim, SCRIM_PROGRESS,
state.getWorkspaceBackgroundAlpha(mLauncher), LINEAR);
SysUiScrim sysUiScrim = mLauncher.getRootView().getSysUiScrim();
propertySetter.setFloat(sysUiScrim, SYSUI_PROGRESS,
state.hasFlag(FLAG_HAS_SYS_UI_SCRIM) ? 1 : 0, LINEAR);
propertySetter.setViewBackgroundColor(mLauncher.getScrimView(),
state.getWorkspaceScrimColor(mLauncher),
config.getInterpolator(ANIM_SCRIM_FADE, ACCEL_2));
}
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);
float springLoadedProgress = (state instanceof SpringLoadedState) ? 1.0f : 0f;
propertySetter.setFloat(cl,
CellLayout.SPRING_LOADED_PROGRESS, springLoadedProgress, ZOOM_OUT);
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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