/*
* Copyright (C) 2017 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 androidx.wear.widget;
import android.content.Context;
import android.view.KeyEvent;
import android.view.animation.Animation;
import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;
import androidx.annotation.UiThread;
import androidx.wear.utils.ActivityAnimationUtil;
/**
* Controller that handles the back button click for dismiss the frame layout
*
*/
@RestrictTo(Scope.LIBRARY)
@UiThread
class BackButtonDismissController extends DismissController {
BackButtonDismissController(Context context, DismissibleFrameLayout layout) {
super(context, layout);
// set this to true will also ensure that this view is focusable
layout.setFocusableInTouchMode(true);
// Dismiss upon back button press
layout.requestFocus();
layout.setOnKeyListener(
(view, keyCode, event) -> keyCode == KeyEvent.KEYCODE_BACK
&& event.getAction() == KeyEvent.ACTION_UP
&& dismiss());
}
void disable(@NonNull DismissibleFrameLayout layout) {
setOnDismissListener(null);
layout.setOnKeyListener(null);
// setting this to false will also ensure that this view is not focusable in touch mode
layout.setFocusable(false);
layout.clearFocus();
}
private boolean dismiss() {
if (mDismissListener == null) return false;
Animation exitAnimation = ActivityAnimationUtil.getStandardActivityAnimation(
mContext, ActivityAnimationUtil.CLOSE_EXIT,
/* scaled by TRANSITION_ANIMATION_SCALE */true);
if (exitAnimation != null) {
exitAnimation.setAnimationListener(
new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mDismissListener.onDismissStarted();
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
mDismissListener.onDismissed();
}
});
mLayout.startAnimation(exitAnimation);
} else {
mDismissListener.onDismissStarted();
mDismissListener.onDismissed();
}
return true;
}
}