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/*
* Copyright (C) 2021 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 android.window;
import android.window.BackEvent;
/**
* Interface that wraps a {@link OnBackInvokedCallback} object, to be stored in window manager
* and called from back handling process when back is invoked.
*
* @hide
*/
oneway interface IOnBackInvokedCallback {
/**
* Called when a back gesture has been started, or back button has been pressed down.
* Wraps {@link OnBackInvokedCallback#onBackStarted(BackEvent)}.
*
* @param backEvent The {@link BackEvent} containing information about the touch or button press.
*/
void onBackStarted(in BackEvent backEvent);
/**
* Called on back gesture progress.
* Wraps {@link OnBackInvokedCallback#onBackProgressed(BackEvent)}.
*
* @param backEvent The {@link BackEvent} containing information about the latest touch point
* and the progress that the back animation should seek to.
*/
void onBackProgressed(in BackEvent backEvent);
/**
* Called when a back gesture or back button press has been cancelled.
* Wraps {@link OnBackInvokedCallback#onBackCancelled()}.
*/
void onBackCancelled();
/**
* Called when a back gesture has been completed and committed, or back button pressed
* has been released and committed.
* Wraps {@link OnBackInvokedCallback#onBackInvoked()}.
*/
void onBackInvoked();
}
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