1 /*
2  * Copyright (C) 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.intentresolver.widget
18 
19 import android.view.View
20 
21 interface ImagePreviewView {
setTransitionElementStatusCallbacknull22     fun setTransitionElementStatusCallback(callback: TransitionElementStatusCallback?)
23     fun getTransitionView(): View?
24 
25     /**
26      * [ImagePreviewView] progressively prepares views for shared element transition and reports
27      * each successful preparation with [onTransitionElementReady] call followed by closing
28      * [onAllTransitionElementsReady] invocation. Thus the overall invocation pattern is zero or
29      * more [onTransitionElementReady] calls followed by the final [onAllTransitionElementsReady]
30      * call.
31      */
32     interface TransitionElementStatusCallback {
33         /**
34          * Invoked when a view for a shared transition animation element is ready i.e. the image is
35          * loaded and the view is laid out.
36          *
37          * @param name shared element name.
38          */
39         fun onTransitionElementReady(name: String)
40 
41         /**
42          * Indicates that all supported transition elements have been reported with
43          * [onTransitionElementReady].
44          */
45         fun onAllTransitionElementsReady()
46     }
47 }
48