pikapika/lib/basic/Common.dart

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import 'package:flutter/material.dart';
import 'package:flutter_styled_toast/flutter_styled_toast.dart';
import 'config/TimeOffsetHour.dart';
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/// 默认的图片尺寸
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double coverWidth = 210;
double coverHeight = 315;
String categoryTitle(String? categoryTitle) {
return categoryTitle ?? "全分类";
}
/// 显示一个toast
void defaultToast(BuildContext context, String title) {
showToast(
title,
context: context,
position: StyledToastPosition.center,
animation: StyledToastAnimation.scale,
reverseAnimation: StyledToastAnimation.fade,
duration: Duration(seconds: 4),
animDuration: Duration(seconds: 1),
curve: Curves.elasticOut,
reverseCurve: Curves.linear,
);
}
/// 显示一个确认框, 用户关闭弹窗以及选择否都会返回false, 仅当用户选择确定时返回true
Future<bool> confirmDialog(
BuildContext context, String title, String content) async {
return await showDialog(
context: context,
builder: (context) => AlertDialog(
title: Text(title),
content: new SingleChildScrollView(
child: new ListBody(
children: <Widget>[
new Text(content),
],
),
),
actions: <Widget>[
new MaterialButton(
child: new Text('取消'),
onPressed: () {
Navigator.of(context).pop(false);
},
),
new MaterialButton(
child: new Text('确定'),
onPressed: () {
Navigator.of(context).pop(true);
},
),
],
)) ??
false;
}
/// 显示一个消息提示框
Future alertDialog(BuildContext context, String title, String content) {
return showDialog(
context: context,
builder: (context) => AlertDialog(
title: Text(title),
content: new SingleChildScrollView(
child: new ListBody(
children: <Widget>[
new Text(content),
],
),
),
actions: <Widget>[
new MaterialButton(
child: new Text('确定'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
));
}
/// stream-filter的替代方法
List<T> filteredList<T>(List<T> list, bool Function(T) filter) {
List<T> result = [];
list.forEach((element) {
if (filter(element)) {
result.add(element);
}
});
return result;
}
/// 创建一个单选对话框, 用户取消选择返回null, 否则返回所选内容
Future<T?> chooseListDialog<T>(
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BuildContext context, String title, List<T> items,
{String? tips}) async {
List<Widget> widgets = [];
if (tips != null) {
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widgets.add(Container(
padding: EdgeInsets.fromLTRB(15, 5, 15, 15),
child: Text(tips),
));
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}
widgets.addAll(items.map((e) => SimpleDialogOption(
onPressed: () {
Navigator.of(context).pop(e);
},
child: Text('$e'),
)));
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return showDialog<T>(
context: context,
builder: (BuildContext context) {
return SimpleDialog(
title: Text(title),
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children: widgets,
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);
},
);
}
/// 创建一个单选对话框, 用户取消选择返回null, 否则返回所选内容(value)
Future<T?> chooseMapDialog<T>(
BuildContext buildContext, Map<String, T> values, String title) async {
return await showDialog<T>(
context: buildContext,
builder: (BuildContext context) {
return SimpleDialog(
title: Text(title),
children: values.entries
.map((e) => SimpleDialogOption(
child: Text(e.key),
onPressed: () {
Navigator.of(context).pop(e.value);
},
))
.toList(),
);
},
);
}
/// 输入对话框1
var _controller = TextEditingController.fromValue(TextEditingValue(text: ''));
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Future<String?> displayTextInputDialog(BuildContext context,
{String? title, String src = "", String? hint, String? desc, bool isPasswd = false}) {
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_controller.text = src;
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
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title: title == null ? null : Text(title),
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content: SingleChildScrollView(
child: ListBody(
children: [
TextField(
controller: _controller,
decoration: InputDecoration(hintText: hint),
obscureText: isPasswd,
obscuringCharacter: '\u2022',
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),
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...(desc == null
? []
: [
Container(
padding: EdgeInsets.only(top: 20, bottom: 10),
child: Text(
desc,
style: TextStyle(
fontSize: 12,
color: Theme.of(context)
.textTheme
.bodyText1
?.color
?.withOpacity(.5)),
),
)
]),
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],
),
),
actions: <Widget>[
MaterialButton(
child: Text('取消'),
onPressed: () {
Navigator.of(context).pop();
},
),
MaterialButton(
child: Text('确认'),
onPressed: () {
Navigator.of(context).pop(_controller.text);
},
),
],
);
},
);
}
/// 将字符串前面加0直至满足len位
String add0(int num, int len) {
var rsp = "$num";
while (rsp.length < len) {
rsp = "0$rsp";
}
return rsp;
}
/// 格式化时间 2012-34-56
String formatTimeToDate(String str) {
try {
var c = DateTime.parse(str).add(Duration(hours: currentTimeOffsetHour()));
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return "${add0(c.year, 4)}-${add0(c.month, 2)}-${add0(c.day, 2)}";
} catch (e) {
return "-";
}
}
/// 格式化时间 2012-34-56 12:34:56
String formatTimeToDateTime(String str) {
try {
var c = DateTime.parse(str).add(Duration(hours: currentTimeOffsetHour()));
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return "${add0(c.year, 4)}-${add0(c.month, 2)}-${add0(c.day, 2)} ${add0(c.hour, 2)}:${add0(c.minute, 2)}";
} catch (e) {
return "-";
}
}
/// 输入对话框2
final TextEditingController _textEditController =
TextEditingController(text: '');
Future<String?> inputString(BuildContext context, String title,
{String hint = ""}) async {
_textEditController.clear();
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
content: Card(
child: SingleChildScrollView(
child: ListBody(
children: [
Text(title),
Container(
child: TextField(
controller: _textEditController,
decoration: new InputDecoration(
labelText: "$hint",
),
),
),
],
),
),
),
actions: <Widget>[
MaterialButton(
onPressed: () {
Navigator.pop(context);
},
child: Text('取消'),
),
MaterialButton(
onPressed: () {
Navigator.pop(context, _textEditController.text);
},
child: Text('确定'),
),
],
);
},
);
}