1 /*
2  * Copyright (C) 2016 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.deskclock.widget;
18 
19 import android.content.Context;
20 import android.support.v7.widget.AppCompatTextView;
21 import android.util.AttributeSet;
22 
23 /**
24  * A TextView which automatically re-sizes its text to fit within its boundaries.
25  */
26 public class AutoSizingTextView extends AppCompatTextView {
27 
28     private final TextSizeHelper mTextSizeHelper;
29 
AutoSizingTextView(Context context)30     public AutoSizingTextView(Context context) {
31         this(context, null);
32     }
33 
AutoSizingTextView(Context context, AttributeSet attrs)34     public AutoSizingTextView(Context context, AttributeSet attrs) {
35         this(context, attrs, android.R.attr.textViewStyle);
36     }
37 
AutoSizingTextView(Context context, AttributeSet attrs, int defStyleAttr)38     public AutoSizingTextView(Context context, AttributeSet attrs, int defStyleAttr) {
39         super(context, attrs, defStyleAttr);
40         mTextSizeHelper = new TextSizeHelper(this);
41     }
42 
43     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)44     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
45         mTextSizeHelper.onMeasure(widthMeasureSpec, heightMeasureSpec);
46         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
47     }
48 
49     @Override
onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter)50     protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
51         super.onTextChanged(text, start, lengthBefore, lengthAfter);
52         if (mTextSizeHelper != null) {
53             mTextSizeHelper.onTextChanged(lengthBefore, lengthAfter);
54         } else {
55             requestLayout();
56         }
57     }
58 
59     @Override
requestLayout()60     public void requestLayout() {
61         if (mTextSizeHelper == null || !mTextSizeHelper.shouldIgnoreRequestLayout()) {
62             super.requestLayout();
63         }
64     }
65 }