content: /*
   * Copyright (C) 2016 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.internal.widget;
  
  import android.annotation.Nullable;
  import android.content.Context;
  import android.graphics.Rect;
  import android.util.AttributeSet;
  import android.view.View;
  import android.view.accessibility.AccessibilityNodeInfo;
  import android.widget.Button;
  import android.widget.ImageView;
  import android.widget.RemoteViews;
  
  /**
   * An expand button in a notification
   */
  @RemoteViews.RemoteView
  public class NotificationExpandButton extends ImageView {
  
      public NotificationExpandButton(Context context) {
          super(context);
      }
  
      public NotificationExpandButton(Context context, @Nullable AttributeSet attrs) {
          super(context, attrs);
      }
  
      public NotificationExpandButton(Context context, @Nullable AttributeSet attrs,
              int defStyleAttr) {
          super(context, attrs, defStyleAttr);
      }
  
      public NotificationExpandButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
              int defStyleRes) {
          super(context, attrs, defStyleAttr, defStyleRes);
      }
  
      @Override
      public void getBoundsOnScreen(Rect outRect, boolean clipToParent) {
          super.getBoundsOnScreen(outRect, clipToParent);
          extendRectToMinTouchSize(outRect);
      }
  
      private void extendRectToMinTouchSize(Rect rect) {
          int touchTargetSize = (int) (getResources().getDisplayMetrics().density * 48);
          rect.left = rect.centerX() - touchTargetSize / 2;
          rect.right = rect.left + touchTargetSize;
          rect.top = rect.centerY() - touchTargetSize / 2;
          rect.bottom = rect.top + touchTargetSize;
      }
  
      @Override
      public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
          super.onInitializeAccessibilityNodeInfo(info);
          info.setClassName(Button.class.getName());
      }
  }
  