1 /* 2 * Copyright 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package androidx.preference.internal; 18 19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; 20 21 import android.content.Context; 22 import android.content.res.TypedArray; 23 import android.util.AttributeSet; 24 import android.widget.ImageView; 25 26 import androidx.annotation.RestrictTo; 27 import androidx.preference.R; 28 29 /** 30 * Extension of ImageView that correctly applies maxWidth and maxHeight. 31 * @hide 32 */ 33 @RestrictTo(LIBRARY_GROUP) 34 public class PreferenceImageView extends ImageView { 35 36 private int mMaxWidth = Integer.MAX_VALUE; 37 private int mMaxHeight = Integer.MAX_VALUE; 38 39 public PreferenceImageView(Context context) { 40 this(context, null); 41 } 42 43 public PreferenceImageView(Context context, AttributeSet attrs) { 44 this(context, attrs, 0); 45 } 46 47 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr) { 48 super(context, attrs, defStyleAttr); 49 50 final TypedArray a = context.obtainStyledAttributes( 51 attrs, R.styleable.PreferenceImageView, defStyleAttr, 0); 52 53 setMaxWidth(a.getDimensionPixelSize( 54 R.styleable.PreferenceImageView_maxWidth, Integer.MAX_VALUE)); 55 56 setMaxHeight(a.getDimensionPixelSize( 57 R.styleable.PreferenceImageView_maxHeight, Integer.MAX_VALUE)); 58 59 a.recycle(); 60 } 61 62 // public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, 63 // int defStyleRes) { 64 // super(context, attrs, defStyleAttr, defStyleRes); 65 // } 66 67 @Override 68 public void setMaxWidth(int maxWidth) { 69 mMaxWidth = maxWidth; 70 super.setMaxWidth(maxWidth); 71 } 72 73 @Override 74 public int getMaxWidth() { 75 return mMaxWidth; 76 } 77 78 @Override 79 public void setMaxHeight(int maxHeight) { 80 mMaxHeight = maxHeight; 81 super.setMaxHeight(maxHeight); 82 } 83 84 @Override 85 public int getMaxHeight() { 86 return mMaxHeight; 87 } 88 89 @Override 90 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 91 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 92 if (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED) { 93 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 94 final int maxWidth = getMaxWidth(); 95 if (maxWidth != Integer.MAX_VALUE 96 && (maxWidth < widthSize || widthMode == MeasureSpec.UNSPECIFIED)) { 97 widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST); 98 } 99 } 100 101 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 102 if (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED) { 103 final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 104 final int maxHeight = getMaxHeight(); 105 if (maxHeight != Integer.MAX_VALUE 106 && (maxHeight < heightSize || heightMode == MeasureSpec.UNSPECIFIED)) { 107 heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST); 108 } 109 } 110 111 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 112 } 113 } 114
