1 /* 2 * Copyright (C) 2019 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.systemui.util; 18 19 import android.content.Context; 20 import android.text.TextUtils; 21 import android.util.AttributeSet; 22 import android.widget.TextView; 23 24 /** 25 * TextView that changes its ellipsize value with its visibility. 26 * 27 * The View responds to changes in user-visibility to change its ellipsize from MARQUEE to END 28 * and back. Useful for TextView that need to marquee forever. 29 */ 30 public class AutoMarqueeTextView extends TextView { 31 32 private boolean mAggregatedVisible = false; 33 AutoMarqueeTextView(Context context)34 public AutoMarqueeTextView(Context context) { 35 super(context); 36 } 37 AutoMarqueeTextView(Context context, AttributeSet attrs)38 public AutoMarqueeTextView(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 } 41 AutoMarqueeTextView(Context context, AttributeSet attrs, int defStyleAttr)42 public AutoMarqueeTextView(Context context, AttributeSet attrs, int defStyleAttr) { 43 super(context, attrs, defStyleAttr); 44 } 45 AutoMarqueeTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)46 public AutoMarqueeTextView(Context context, AttributeSet attrs, int defStyleAttr, 47 int defStyleRes) { 48 super(context, attrs, defStyleAttr, defStyleRes); 49 } 50 51 @Override onFinishInflate()52 protected void onFinishInflate() { 53 onVisibilityAggregated(isVisibleToUser()); 54 } 55 56 @Override onAttachedToWindow()57 protected void onAttachedToWindow() { 58 super.onAttachedToWindow(); 59 setSelected(true); 60 } 61 62 @Override onDetachedFromWindow()63 protected void onDetachedFromWindow() { 64 super.onDetachedFromWindow(); 65 setSelected(false); 66 } 67 68 @Override onVisibilityAggregated(boolean isVisible)69 public void onVisibilityAggregated(boolean isVisible) { 70 super.onVisibilityAggregated(isVisible); 71 if (isVisible == mAggregatedVisible) return; 72 73 mAggregatedVisible = isVisible; 74 if (mAggregatedVisible) { 75 setEllipsize(TextUtils.TruncateAt.MARQUEE); 76 } else { 77 setEllipsize(TextUtils.TruncateAt.END); 78 } 79 } 80 } 81