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
17package android.support.v7.internal.widget;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.support.v7.preference.R;
22import android.util.AttributeSet;
23import android.widget.ImageView;
24
25/**
26 * Extension of ImageView that correctly applies maxWidth and maxHeight.
27 * @hide
28 */
29public class PreferenceImageView extends ImageView {
30
31    private int mMaxWidth = Integer.MAX_VALUE;
32    private int mMaxHeight = Integer.MAX_VALUE;
33
34    public PreferenceImageView(Context context) {
35        this(context, null);
36    }
37
38    public PreferenceImageView(Context context, AttributeSet attrs) {
39        this(context, attrs, 0);
40    }
41
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
63    public void setMaxWidth(int maxWidth) {
64        mMaxWidth = maxWidth;
65        super.setMaxWidth(maxWidth);
66    }
67
68    public int getMaxWidth() {
69        return mMaxWidth;
70    }
71
72    @Override
73    public void setMaxHeight(int maxHeight) {
74        mMaxHeight = maxHeight;
75        super.setMaxHeight(maxHeight);
76    }
77
78    public int getMaxHeight() {
79        return mMaxHeight;
80    }
81
82    @Override
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