content: /*
   * 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.google.android.exoplayer2.ui;
  
  import android.support.annotation.Nullable;
  import android.view.View;
  
  /**
   * Interface for time bar views that can display a playback position, buffered position, duration
   * and ad markers, and that have a listener for scrubbing (seeking) events.
   */
  public interface TimeBar {
  
    /**
     * Adds a listener for scrubbing events.
     *
     * @param listener The listener to add.
     */
    void addListener(OnScrubListener listener);
  
    /**
     * Removes a listener for scrubbing events.
     *
     * @param listener The listener to remove.
     */
    void removeListener(OnScrubListener listener);
  
    /**
     * @see View#isEnabled()
     */
    void setEnabled(boolean enabled);
  
    /**
     * Sets the position increment for key presses and accessibility actions, in milliseconds.
     * <p>
     * Clears any increment specified in a preceding call to {@link #setKeyCountIncrement(int)}.
     *
     * @param time The time increment, in milliseconds.
     */
    void setKeyTimeIncrement(long time);
  
    /**
     * Sets the position increment for key presses and accessibility actions, as a number of
     * increments that divide the duration of the media. For example, passing 20 will cause key
     * presses to increment/decrement the position by 1/20th of the duration (if known).
     * <p>
     * Clears any increment specified in a preceding call to {@link #setKeyTimeIncrement(long)}.
     *
     * @param count The number of increments that divide the duration of the media.
     */
    void setKeyCountIncrement(int count);
  
    /**
     * Sets the current position.
     *
     * @param position The current position to show, in milliseconds.
     */
    void setPosition(long position);
  
    /**
     * Sets the buffered position.
     *
     * @param bufferedPosition The current buffered position to show, in milliseconds.
     */
    void setBufferedPosition(long bufferedPosition);
  
    /**
     * Sets the duration.
     *
     * @param duration The duration to show, in milliseconds.
     */
    void setDuration(long duration);
  
    /**
     * Sets the times of ad groups and whether each ad group has been played.
     *
     * @param adGroupTimesMs An array where the first {@code adGroupCount} elements are the times of
     *     ad groups in milliseconds. May be {@code null} if there are no ad groups.
     * @param playedAdGroups An array where the first {@code adGroupCount} elements indicate whether
     *     the corresponding ad groups have been played. May be {@code null} if there are no ad
     *     groups.
     * @param adGroupCount The number of ad groups.
     */
    void setAdGroupTimesMs(@Nullable long[] adGroupTimesMs, @Nullable boolean[] playedAdGroups,
        int adGroupCount);
  
    /**
     * Listener for scrubbing events.
     */
    interface OnScrubListener {
  
      /**
       * Called when the user starts moving the scrubber.
       *
       * @param timeBar The time bar.
       * @param position The position of the scrubber, in milliseconds.
       */
      void onScrubStart(TimeBar timeBar, long position);
  
      /**
       * Called when the user moves the scrubber.
       *
       * @param timeBar The time bar.
       * @param position The position of the scrubber, in milliseconds.
       */
      void onScrubMove(TimeBar timeBar, long position);
  
      /**
       * Called when the user stops moving the scrubber.
       *
       * @param timeBar The time bar.
       * @param position The position of the scrubber, in milliseconds.
       * @param canceled Whether scrubbing was canceled.
       */
      void onScrubStop(TimeBar timeBar, long position, boolean canceled);
  
    }
  
  }
  