1 /* 2 * Copyright (C) 2015 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 android.support.v7.internal.widget; 18 19 import android.content.Context; 20 import android.content.res.TypedArray; 21 import android.support.annotation.RestrictTo; 22 import android.support.v7.preference.R; 23 import android.util.AttributeSet; 24 import android.widget.ImageView; 25 26 import static android.support.annotation.RestrictTo.Scope.GROUP_ID; 27 28 /** 29 * Extension of ImageView that correctly applies maxWidth and maxHeight. 30 * @hide 31 */ 32 @RestrictTo(GROUP_ID) 33 public class PreferenceImageView extends ImageView { 34 35 private int mMaxWidth = Integer.MAX_VALUE; 36 private int mMaxHeight = Integer.MAX_VALUE; 37 PreferenceImageView(Context context)38 public PreferenceImageView(Context context) { 39 this(context, null); 40 } 41 PreferenceImageView(Context context, AttributeSet attrs)42 public PreferenceImageView(Context context, AttributeSet attrs) { 43 this(context, attrs, 0); 44 } 45 PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr)46 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr) { 47 super(context, attrs, defStyleAttr); 48 49 final TypedArray a = context.obtainStyledAttributes( 50 attrs, R.styleable.PreferenceImageView, defStyleAttr, 0); 51 52 setMaxWidth(a.getDimensionPixelSize( 53 R.styleable.PreferenceImageView_maxWidth, Integer.MAX_VALUE)); 54 55 setMaxHeight(a.getDimensionPixelSize( 56 R.styleable.PreferenceImageView_maxHeight, Integer.MAX_VALUE)); 57 58 a.recycle(); 59 } 60 61 // public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, 62 // int defStyleRes) { 63 // super(context, attrs, defStyleAttr, defStyleRes); 64 // } 65 66 @Override setMaxWidth(int maxWidth)67 public void setMaxWidth(int maxWidth) { 68 mMaxWidth = maxWidth; 69 super.setMaxWidth(maxWidth); 70 } 71 getMaxWidth()72 public int getMaxWidth() { 73 return mMaxWidth; 74 } 75 76 @Override setMaxHeight(int maxHeight)77 public void setMaxHeight(int maxHeight) { 78 mMaxHeight = maxHeight; 79 super.setMaxHeight(maxHeight); 80 } 81 getMaxHeight()82 public int getMaxHeight() { 83 return mMaxHeight; 84 } 85 86 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)87 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 88 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 89 if (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED) { 90 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 91 final int maxWidth = getMaxWidth(); 92 if (maxWidth != Integer.MAX_VALUE 93 && (maxWidth < widthSize || widthMode == MeasureSpec.UNSPECIFIED)) { 94 widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST); 95 } 96 } 97 98 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 99 if (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED) { 100 final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 101 final int maxHeight = getMaxHeight(); 102 if (maxHeight != Integer.MAX_VALUE 103 && (maxHeight < heightSize || heightMode == MeasureSpec.UNSPECIFIED)) { 104 heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST); 105 } 106 } 107 108 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 109 } 110 } 111