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