1 /* 2 * Copyright (C) 2014 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 com.android.internal.widget; 18 19 import android.annotation.UnsupportedAppUsage; 20 import android.content.Context; 21 import android.util.AttributeSet; 22 import android.widget.ImageView; 23 24 /** 25 * Extension of ImageView that correctly applies maxWidth and maxHeight. 26 */ 27 public class PreferenceImageView extends ImageView { 28 PreferenceImageView(Context context)29 public PreferenceImageView(Context context) { 30 this(context, null); 31 } 32 33 @UnsupportedAppUsage PreferenceImageView(Context context, AttributeSet attrs)34 public PreferenceImageView(Context context, AttributeSet attrs) { 35 this(context, attrs, 0); 36 } 37 PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr)38 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr) { 39 this(context, attrs, defStyleAttr, 0); 40 } 41 PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)42 public PreferenceImageView(Context context, AttributeSet attrs, int defStyleAttr, 43 int defStyleRes) { 44 super(context, attrs, defStyleAttr, defStyleRes); 45 } 46 47 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)48 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 49 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 50 if (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED) { 51 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 52 final int maxWidth = getMaxWidth(); 53 if (maxWidth != Integer.MAX_VALUE 54 && (maxWidth < widthSize || widthMode == MeasureSpec.UNSPECIFIED)) { 55 widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST); 56 } 57 } 58 59 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 60 if (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED) { 61 final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 62 final int maxHeight = getMaxHeight(); 63 if (maxHeight != Integer.MAX_VALUE 64 && (maxHeight < heightSize || heightMode == MeasureSpec.UNSPECIFIED)) { 65 heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST); 66 } 67 } 68 69 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 70 } 71 } 72