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84 lines
2.5 KiB
84 lines
2.5 KiB
import 'package:flutter/material.dart';
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import 'package:flutter/cupertino.dart';
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//TODO Please remove those sh*t code.
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class ExpandableText extends StatefulWidget {
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final String text;
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final int maxLines;
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final TextStyle style;
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bool expand;
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ExpandableText({Key key, this.text, this.maxLines, this.style, this.expand})
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: super(key: key);
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@override
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_ExpandableTextState createState() => _ExpandableTextState();
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}
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class _ExpandableTextState extends State<ExpandableText> {
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@override
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void initState() {
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super.initState();
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if (widget.expand == null) {
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setState(() {
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widget.expand = false;
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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return Container(
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child: LayoutBuilder(
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builder: (BuildContext context, size) {
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final span = TextSpan(text: widget.text ?? '', style: widget.style);
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final tp = TextPainter(
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text: span,
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maxLines: widget.maxLines,
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textDirection: TextDirection.ltr,
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);
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tp.layout(maxWidth: size.maxWidth);
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if (tp.didExceedMaxLines) {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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widget.expand
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? Text(
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widget.text ?? '',
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style: widget.style,
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)
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: Text(
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widget.text ?? '',
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maxLines: widget.maxLines,
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overflow: TextOverflow.ellipsis,
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style: widget.style,
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),
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GestureDetector(
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behavior: HitTestBehavior.translucent,
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onTap: () {
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setState(() {
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widget.expand = !widget.expand;
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});
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},
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child: Container(
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padding: EdgeInsets.only(top: 2),
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child: Text(
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widget.expand ? '收起' : '全文',
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style: TextStyle(
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fontSize: widget.style != null
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? widget.style.fontSize
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: null,
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color: Color(0xffffc40c)),
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),
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),
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)
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],
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);
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} else {
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return Text(widget.text ?? '', style: widget.style);
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}
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},
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),
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);
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}
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}
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