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 }