Tony
5273b695c2
We determine the toAlpha at the start of the state change, but something may happen (e.g. we lose window focus) during the transition. So to make sure we don't end in a state with the wrong alpha, reapply at the end. Bug: 109835691 Change-Id: I271a1d269f861f698efbb8e66148a924c8620e71
72 lines
2.7 KiB
Java
72 lines
2.7 KiB
Java
/*
|
|
* Copyright (C) 2018 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.uioverrides;
|
|
|
|
import android.animation.Animator;
|
|
import android.animation.AnimatorListenerAdapter;
|
|
import android.animation.ValueAnimator;
|
|
|
|
import com.android.launcher3.Launcher;
|
|
import com.android.launcher3.LauncherState;
|
|
import com.android.launcher3.LauncherStateManager;
|
|
import com.android.launcher3.anim.AnimatorSetBuilder;
|
|
import com.android.quickstep.OverviewInteractionState;
|
|
|
|
public class BackButtonAlphaHandler implements LauncherStateManager.StateHandler {
|
|
|
|
private static final String TAG = "BackButtonAlphaHandler";
|
|
|
|
private final Launcher mLauncher;
|
|
private final OverviewInteractionState mOverviewInteractionState;
|
|
|
|
public BackButtonAlphaHandler(Launcher launcher) {
|
|
mLauncher = launcher;
|
|
mOverviewInteractionState = OverviewInteractionState.getInstance(mLauncher);
|
|
}
|
|
|
|
@Override
|
|
public void setState(LauncherState state) {
|
|
UiFactory.onLauncherStateOrFocusChanged(mLauncher);
|
|
}
|
|
|
|
@Override
|
|
public void setStateWithAnimation(LauncherState toState,
|
|
AnimatorSetBuilder builder, LauncherStateManager.AnimationConfig config) {
|
|
if (!config.playNonAtomicComponent()) {
|
|
return;
|
|
}
|
|
float fromAlpha = mOverviewInteractionState.getBackButtonAlpha();
|
|
float toAlpha = toState.hideBackButton ? 0 : 1;
|
|
if (Float.compare(fromAlpha, toAlpha) != 0) {
|
|
ValueAnimator anim = ValueAnimator.ofFloat(fromAlpha, toAlpha);
|
|
anim.setDuration(config.duration);
|
|
anim.addUpdateListener(valueAnimator -> {
|
|
final float alpha = (float) valueAnimator.getAnimatedValue();
|
|
mOverviewInteractionState.setBackButtonAlpha(alpha, false);
|
|
});
|
|
anim.addListener(new AnimatorListenerAdapter() {
|
|
@Override
|
|
public void onAnimationEnd(Animator animation) {
|
|
// Reapply the final alpha in case some state (e.g. window focus) changed.
|
|
UiFactory.onLauncherStateOrFocusChanged(mLauncher);
|
|
}
|
|
});
|
|
builder.play(anim);
|
|
}
|
|
}
|
|
}
|