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.util.AttributeSet;
21 import android.widget.TextClock;
22 
23 /**
24  *  Wrapper around TextClock that automatically re-sizes itself to fit within the given bounds.
25  */
26 public class AutoSizingTextClock extends TextClock {
27 
28     private final TextSizeHelper mTextSizeHelper;
29     private boolean mSuppressLayout = false;
30 
AutoSizingTextClock(Context context)31     public AutoSizingTextClock(Context context) {
32         this(context, null);
33     }
34 
AutoSizingTextClock(Context context, AttributeSet attrs)35     public AutoSizingTextClock(Context context, AttributeSet attrs) {
36         this(context, attrs, 0);
37     }
38 
AutoSizingTextClock(Context context, AttributeSet attrs, int defStyleAttr)39     public AutoSizingTextClock(Context context, AttributeSet attrs, int defStyleAttr) {
40         super(context, attrs, defStyleAttr);
41         mTextSizeHelper = new TextSizeHelper(this);
42     }
43 
44     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)45     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
46         mTextSizeHelper.onMeasure(widthMeasureSpec, heightMeasureSpec);
47         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
48     }
49 
50     @Override
onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter)51     protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
52         super.onTextChanged(text, start, lengthBefore, lengthAfter);
53         if (mTextSizeHelper != null) {
54             if (lengthBefore != lengthAfter) {
55                 mSuppressLayout = false;
56             }
57             mTextSizeHelper.onTextChanged(lengthBefore, lengthAfter);
58         } else {
59             requestLayout();
60         }
61     }
62 
63     @Override
setText(CharSequence text, BufferType type)64     public void setText(CharSequence text, BufferType type) {
65         mSuppressLayout = true;
66         super.setText(text, type);
67         mSuppressLayout = false;
68     }
69 
70     @Override
requestLayout()71     public void requestLayout() {
72         if (mTextSizeHelper == null || !mTextSizeHelper.shouldIgnoreRequestLayout()) {
73             if (!mSuppressLayout) {
74                 super.requestLayout();
75             }
76         }
77     }
78 }