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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 com.android.launcher3.LauncherAnimUtils.DRAWABLE_ALPHA;
import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
import static com.android.launcher3.LauncherState.DRAG_HANDLE_INDICATOR;
import static com.android.launcher3.LauncherState.HOTSEAT_ICONS;
import static com.android.launcher3.LauncherState.HOTSEAT_SEARCH_BOX;
import static com.android.launcher3.anim.PropertySetter.NO_ANIM_PROPERTY_SETTER;
import android.view.View;
import com.android.launcher3.LauncherState.PageAlphaProvider;
import com.android.launcher3.LauncherStateManager.AnimationConfig;
import com.android.launcher3.anim.AnimatorSetBuilder;
import com.android.launcher3.anim.Interpolators;
import com.android.launcher3.anim.PropertySetter;
import com.android.launcher3.graphics.ViewScrim;
/**
* 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);
}
public void setStateWithAnimation(LauncherState toState, AnimatorSetBuilder builder,
AnimationConfig config) {
setWorkspaceProperty(toState, config.getPropertySetter(builder));
}
public float getFinalScale() {
return mNewScale;
}
/**
* Starts a transition animation for the workspace.
*/
private void setWorkspaceProperty(LauncherState state, PropertySetter propertySetter) {
float[] scaleAndTranslation = state.getWorkspaceScaleAndTranslation(mLauncher);
mNewScale = scaleAndTranslation[0];
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);
}
propertySetter.setFloat(mWorkspace, SCALE_PROPERTY, mNewScale, Interpolators.ZOOM_OUT);
propertySetter.setFloat(mWorkspace, View.TRANSLATION_X,
scaleAndTranslation[1], Interpolators.ZOOM_OUT);
propertySetter.setFloat(mWorkspace, View.TRANSLATION_Y,
scaleAndTranslation[2], Interpolators.ZOOM_OUT);
int elements = state.getVisibleElements(mLauncher);
float hotseatIconsAlpha = (elements & HOTSEAT_ICONS) != 0 ? 1 : 0;
propertySetter.setViewAlpha(mLauncher.getHotseat().getLayout(), hotseatIconsAlpha,
pageAlphaProvider.interpolator);
propertySetter.setViewAlpha(mLauncher.getWorkspace().getPageIndicator(),
hotseatIconsAlpha, pageAlphaProvider.interpolator);
propertySetter.setViewAlpha(mLauncher.getHotseatSearchBox(),
(elements & HOTSEAT_SEARCH_BOX) != 0 ? 1 : 0,
pageAlphaProvider.interpolator);
propertySetter.setViewAlpha(mLauncher.getDragHandleIndicator(),
(elements & DRAG_HANDLE_INDICATOR) != 0 ? 1 : 0,
pageAlphaProvider.interpolator);
// Set scrim
propertySetter.setFloat(ViewScrim.get(mWorkspace), ViewScrim.PROGRESS,
state.getWorkspaceScrimAlpha(mLauncher), Interpolators.LINEAR);
}
public void applyChildState(LauncherState state, CellLayout cl, int childIndex) {
applyChildState(state, cl, childIndex, state.getWorkspacePageAlphaProvider(mLauncher),
NO_ANIM_PROPERTY_SETTER);
}
private void applyChildState(LauncherState state, CellLayout cl, int childIndex,
PageAlphaProvider pageAlphaProvider, PropertySetter propertySetter) {
float pageAlpha = pageAlphaProvider.getPageAlpha(childIndex);
int drawableAlpha = Math.round(pageAlpha * (state.hasWorkspacePageBackground ? 255 : 0));
propertySetter.setInt(cl.getScrimBackground(),
DRAWABLE_ALPHA, drawableAlpha, Interpolators.ZOOM_OUT);
propertySetter.setFloat(cl.getShortcutsAndWidgets(), View.ALPHA,
pageAlpha, pageAlphaProvider.interpolator);
}
}
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