| /* |
| * Copyright 2018 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.car.media.common; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.widget.ImageView; |
| |
| import androidx.annotation.IntDef; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| |
| /** |
| * Custom {@link android.widget.ImageButton} that has four custom states: |
| * <ul> |
| * <li>state_playing</li> |
| * <li>state_paused</li> |
| * <li>state_stopped</li> |
| * <li>state_disabled</li> |
| * </ul> |
| */ |
| public class PlayPauseStopImageView extends ImageView { |
| private static final String TAG = "PlayPauseStopImageView"; |
| |
| private static final int[] STATE_PAUSE = {R.attr.state_pause}; |
| private static final int[] STATE_STOP = {R.attr.state_stop}; |
| private static final int[] STATE_PLAY = {R.attr.state_play}; |
| private static final int[] STATE_DISABLED = {R.attr.state_disabled}; |
| |
| /** |
| * Possible states of this view |
| */ |
| @IntDef({ACTION_PLAY, ACTION_STOP, ACTION_PAUSE, ACTION_DISABLED}) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface Action {} |
| |
| /** Used when no action can be executed at this time */ |
| public static final int ACTION_DISABLED = 0; |
| /** Used when the media source is ready to start playing */ |
| public static final int ACTION_PLAY = 1; |
| /** Used when the media source is playing and it only support stop action */ |
| public static final int ACTION_STOP = 2; |
| /** Used when the media source is playing and it supports pause action */ |
| public static final int ACTION_PAUSE = 3; |
| |
| private int mAction = ACTION_DISABLED; |
| |
| /** |
| * Constructs an instance of this view |
| */ |
| public PlayPauseStopImageView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| /** |
| * Sets the action to display on this view |
| * |
| * @param action one of {@link Action} |
| */ |
| public void setAction(@Action int action) { |
| mAction = action; |
| refreshDrawableState(); |
| } |
| |
| /** |
| * @return currently selected action |
| */ |
| public int getAction() { |
| return mAction; |
| } |
| |
| @Override |
| public int[] onCreateDrawableState(int extraSpace) { |
| // + 1 so we can potentially add our custom PlayState |
| final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); |
| |
| switch(mAction) { |
| case ACTION_PLAY: |
| mergeDrawableStates(drawableState, STATE_PLAY); |
| break; |
| case ACTION_STOP: |
| mergeDrawableStates(drawableState, STATE_STOP); |
| break; |
| case ACTION_PAUSE: |
| mergeDrawableStates(drawableState, STATE_PAUSE); |
| break; |
| case ACTION_DISABLED: |
| mergeDrawableStates(drawableState, STATE_DISABLED); |
| break; |
| default: |
| Log.e(TAG, "Unknown action: " + mAction); |
| } |
| if (getBackground() != null) { |
| getBackground().setState(drawableState); |
| } |
| return drawableState; |
| } |
| } |