| /* |
| * 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.content.res.TypedArray; |
| import android.util.AttributeSet; |
| import android.view.ViewGroup; |
| import android.widget.ImageView; |
| |
| /** |
| * An {@link ImageView} with a fixed aspect ratio. When using this view, either width or height |
| * must be set to MATCH_PARENT. |
| */ |
| public class FixedRatioImageView extends ImageView { |
| private float mAspectRatio; |
| |
| private static final float DEFAULT_ASPECT_RATIO = 1f; |
| |
| public FixedRatioImageView(Context context) { |
| this(context, null); |
| } |
| |
| public FixedRatioImageView(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public FixedRatioImageView(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FixedRatioImageView); |
| mAspectRatio = a.getFloat(R.styleable.FixedRatioImageView_aspect_ratio, |
| DEFAULT_ASPECT_RATIO); |
| } |
| |
| /** |
| * Modify the aspect ratio of this view. |
| * |
| * @param aspectRatio a ratio between width and height. For example: 2 means this view's width |
| * would be double the height, while 0.5 means that this view's width will |
| * be half the height. |
| */ |
| public void setAspectRatio(float aspectRatio) { |
| mAspectRatio = aspectRatio; |
| requestLayout(); |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| if (getLayoutParams().height == ViewGroup.LayoutParams.MATCH_PARENT) { |
| int height = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec); |
| setMeasuredDimension((int) (height * mAspectRatio), height); |
| } else if (getLayoutParams().width == ViewGroup.LayoutParams.MATCH_PARENT) { |
| int width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec); |
| setMeasuredDimension(width, (int) (width / mAspectRatio)); |
| } else { |
| throw new IllegalArgumentException( |
| "Either width or height should be set to MATCH_PARENT"); |
| } |
| } |
| } |