chunhunghan’s gists

chunhunghan / CustomInputBorder.dart

Last active March 8, 2023 01:05

flutter CustomInputBorder

	//Based on Flutter 3.7.6 Dart SDK 2.19.3
	import 'package:flutter/material.dart';

	const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

	void main() {
	runApp(MyApp());
	}

	class MyApp extends StatelessWidget {

chunhunghan / ui_image_toUint8List.dart

Created December 12, 2019 03:18

	//https://medium.com/flutter-community/export-your-widget-to-image-with-flutter-dc7ecfa6bafb
	ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
	Uint8List pngBytes = byteData.buffer.asUint8List();

chunhunghan / ui_image_from_asset.dart

Created November 25, 2019 02:08

	Future<ui.Image> load(String asset) async {
	ByteData data = await rootBundle.load(asset);
	ui.Codec codec = await ui.instantiateImageCodec(data.buffer.asUint8List());
	ui.FrameInfo fi = await codec.getNextFrame();
	return fi.image;
	}

chunhunghan / main.dart

Created July 11, 2019 09:11

Parse text which contains http or https string inside

	var urlPattern = r"(https?\|http)://([-A-Z0-9.]+)(/[-A-Z0-9+&@#/%=~_\|!:,.;])?(\?[A-Z0-9+&@#/%=~_\|!:‌,.;])?";

	RegExp exp = new RegExp(urlPattern, caseSensitive: false);
	String str = "Parse https://www.google.com/abc中文 http://www.umc.com/ my string";
	Iterable<Match> matches = exp.allMatches(str);
	for (Match m in matches) {
	String match = m.group(0);
	print(match);
	}

chunhunghan / main.dart

Created July 3, 2019 08:18

flutter RotatedBox and Transform https://blog.csdn.net/sinat_31057219/article/details/90295125

	import 'package:flutter/material.dart';
	import 'dart:math' as math;
	import 'package:flutter/rendering.dart';

	//Transform的变换是应用在绘制阶段，而并不是应用在布局(layout)阶段，
	// 所以无论对子widget应用何种变化，其占用空间的大小和在屏幕上的位置都是固定不变的，
	// 因为这些是在布局阶段就确定的。

	main() {
	debugPaintSizeEnabled = true;

chunhunghan / exif.java

Last active July 3, 2019 07:15

How to get Exif data from an InputStream rather than a File? https://stackoverflow.com/questions/39540646/how-to-get-exif-data-from-an-inputstream-rather-than-a-file/41835777

	/*
	After the 25.1.0 support library was introduced, now is possible to read exif data from URI contents (content:// or file://) through an InputStream.

	Example: First add this line to your gradle file:

	compile 'com.android.support:exifinterface:25.1.0'
	*/

	Uri uri; // the URI you've received from the other app
	InputStream in;

chunhunghan / main.dart

Last active June 28, 2019 03:28

chunhunghan / main.dart

Last active August 3, 2022 06:36

Flutter : Round corner container and backdrop Filter effect and https://github.com/SnakeyHips/recipeapp/blob/master/lib/pages/home_page.dart

	Widget frostedEdged(Widget child) {
	return ClipRRect(
	borderRadius: BorderRadius.circular(15.0),
	child: BackdropFilter(
	filter: ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
	child: child));
	}

chunhunghan / main.dart

Last active June 28, 2019 03:29

Flutter : WebSocket connect with headers https://qiita.com/n-luan/items/e81870598e7598ee415b

	channel = new IOWebSocketChannel.connect(socketUrl, headers: {
	"UID": auth.uid,
	"ACCESS_TOKEN": auth.accessToken,
	"CLIENT_ID": auth.clientId
	});

	channel.sink.add(json.encode({
	"command": "subscribe",
	"identifier": "{\"channel\":\"RoomChannel\"}"
	}));

chunhunghan / server.js

Last active June 28, 2019 03:29

Node.js : Websocket authentication using JWT and WS http://iostreamer.me/ws/node.js/jwt/2016/05/08/websockets_authentication.html

	var ws = new WebSocketServer({
	verifyClient: function (info, cb) {
	var token = info.req.headers.token
	if (!token)
	cb(false, 401, 'Unauthorized')
	else {
	jwt.verify(token, 'secret-key', function (err, decoded) {
	if (err) {
	cb(false, 401, 'Unauthorized')
	} else {