Transition.kt
/*
* 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.core.transition
import android.transition.Transition
import androidx.annotation.RequiresApi
/**
* Add an action which will be invoked when this transition has ended.
*/
@RequiresApi(19)
public inline fun Transition.doOnEnd(
crossinline action: (transition: Transition) -> Unit
): Transition.TransitionListener = addListener(onEnd = action)
/**
* Add an action which will be invoked when this transition has started.
*/
@RequiresApi(19)
public inline fun Transition.doOnStart(
crossinline action: (transition: Transition) -> Unit
): Transition.TransitionListener = addListener(onStart = action)
/**
* Add an action which will be invoked when this transition has been cancelled.
*/
@RequiresApi(19)
public inline fun Transition.doOnCancel(
crossinline action: (transition: Transition) -> Unit
): Transition.TransitionListener = addListener(onCancel = action)
/**
* Add an action which will be invoked when this transition has resumed after a pause.
*/
@RequiresApi(19)
public inline fun Transition.doOnResume(
crossinline action: (transition: Transition) -> Unit
): Transition.TransitionListener = addListener(onResume = action)
/**
* Add an action which will be invoked when this transition has been paused.
*/
@RequiresApi(19)
public inline fun Transition.doOnPause(
crossinline action: (transition: Transition) -> Unit
): Transition.TransitionListener = addListener(onPause = action)
/**
* Add a listener to this Transition using the provided actions.
*/
@RequiresApi(19)
public inline fun Transition.addListener(
crossinline onEnd: (transition: Transition) -> Unit = {},
crossinline onStart: (transition: Transition) -> Unit = {},
crossinline onCancel: (transition: Transition) -> Unit = {},
crossinline onResume: (transition: Transition) -> Unit = {},
crossinline onPause: (transition: Transition) -> Unit = {}
): Transition.TransitionListener {
val listener = object : Transition.TransitionListener {
override fun onTransitionEnd(transition: Transition) = onEnd(transition)
override fun onTransitionResume(transition: Transition) = onResume(transition)
override fun onTransitionPause(transition: Transition) = onPause(transition)
override fun onTransitionCancel(transition: Transition) = onCancel(transition)
override fun onTransitionStart(transition: Transition) = onStart(transition)
}
addListener(listener)
return listener
}