Month: November 2022

Change hyperlink color in QT

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	// ui->btnEdit is a QLabel.
	ui->btnEdit->setText(QString("<a href=\"localhost\"><font color=\"#ff0000\">") + tr("Edit") + QString("</font></a>"));
	ui->btnEdit->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
	connect(ui->btnEdit, &QLabel::linkActivated, [=, this](QString url) {
		...
	});

refer to:
https://www.lmlphp.com/user/507/article/item/13949

ERROR 2003 (HY000): Can't connect to MySQL server on ... 113

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telnet 192.168.1.165 3306
 
# firewall in ubuntu
sudo ufw disable
 
# or found ip changed
vi /etc/mysql/mysql.conf.d/mysqld.cnf
systemctl restart mysql
systemctl status mysql

refer to:
https://blog.csdn.net/zhangasas/article/details/89432832

西方科学年表

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1451-1506	Cristoforo Colombo 哥伦布
1452-1519	Leonardo da Vinci 达芬奇
1473-1543	Mikołaj Kopernik 哥白尼
1499-1557	N.Fontana 三次方程求根公式 / Tartaglia 口吃者 / 意法战争 / J.Cardan 卡丹 / L.Ferrari 四次方程求根公式
1548-1600	Giordano Bruno 布鲁诺
1564-1642	Galileo 伽利略
1596-1650	René Descartes 笛卡尔
1643-1727	Isaac Newton 牛顿
1654-1705	Jakob Bernoulli‎ 雅各布第一·伯努利
1667-1748	Johann Bernoulli 约翰第一·伯努利
1707-1783	Leonhard Euler 欧拉
1700-1782	Daniel Bernoulli 丹尼尔第一·伯努利
1736-1813	Joseph-Louis Lagrange 拉格朗日
1777-1855	Johann Carl Friedrich Gauß/Gauss 高斯
1789		French Revolution 法国大革命
1822-1895	Louis Pasteur 巴斯德
1831-1879	James Clerk Maxwell
1853-1928	Hendrik Antoon Lorentz 洛伦兹

refer to:
《古典数学难题与伽罗瓦理论》徐诚浩著