diff options
Diffstat (limited to 'java/com/android/dialershared/bubble/WindowRoot.java')
-rw-r--r-- | java/com/android/dialershared/bubble/WindowRoot.java | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/java/com/android/dialershared/bubble/WindowRoot.java b/java/com/android/dialershared/bubble/WindowRoot.java new file mode 100644 index 000000000..2c176662e --- /dev/null +++ b/java/com/android/dialershared/bubble/WindowRoot.java @@ -0,0 +1,55 @@ +/* + * 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 com.android.dialershared.bubble; + +import android.content.Context; +import android.support.annotation.NonNull; +import android.view.KeyEvent; +import android.widget.FrameLayout; + +/** + * ViewGroup that handles some overlay window concerns. Allows back button events to be listened for + * via an interface. + */ +public class WindowRoot extends FrameLayout { + + private OnBackPressedListener backPressedListener; + + /** Callback for when the back button is pressed while this window is in focus */ + public interface OnBackPressedListener { + boolean onBackPressed(); + } + + public WindowRoot(@NonNull Context context) { + super(context); + } + + public void setOnBackPressedListener(OnBackPressedListener listener) { + backPressedListener = listener; + } + + @Override + public boolean dispatchKeyEvent(KeyEvent event) { + if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && backPressedListener != null) { + if (event.getAction() == KeyEvent.ACTION_UP) { + return backPressedListener.onBackPressed(); + } + return true; + } + return super.dispatchKeyEvent(event); + } +} |