1/*
2 * Copyright (C) 2013 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
17package com.android.incallui;
18
19/**
20 * Base class for Presenters.
21 */
22public abstract class Presenter<U extends Ui> {
23
24    private U mUi;
25
26    /**
27     * Called after the UI view has been created.  That is when fragment.onViewCreated() is called.
28     *
29     * @param ui The Ui implementation that is now ready to be used.
30     */
31    public void onUiReady(U ui) {
32        mUi = ui;
33    }
34
35    /**
36     * Called when the UI view is destroyed in Fragment.onDestroyView().
37     */
38    public final void onUiDestroy(U ui) {
39        onUiUnready(ui);
40        mUi = null;
41    }
42
43    /**
44     * To be overriden by Presenter implementations.  Called when the fragment is being
45     * destroyed but before ui is set to null.
46     */
47    public void onUiUnready(U ui) {
48    }
49
50    public U getUi() {
51        return mUi;
52    }
53}
54