Objects created from a QtCore.QObject can emit signals. In the following example we will see how we can emit custom signals. #!/usr/bin/python # -*- coding: utf-8 -*- """ ZetCode PyQt4 tutorial In this example, we show how to emit a signal.…

Reference:http://zetcode.com/gui/pyqt4/eventsandsignals/ Events and Signals in PyQt4 In this part of the PyQt4 programming tutorial, we will explore events and signals occurring in applications.   Events All GUI applications are event-driven. Events…

/* 输入文件见337.in.txt 输出文件见338.out.txt */ #include <iostream> #include <cctype> #include <fstream> #include <cstring> using namespace std; * + ; //单词表的最大值 + ; //单词长度的最大值 struct WordList { char word[maxWord]; //单词 int fre; //词频 } list[…

[the original link] One of Qt’s most reputed merits is its consistent, easy-to-learn, powerfulAPI. This document tries to summarize the know-how we’ve accumulated on designing Qt-style APIs. Many of the guidelines are universal; others are more conve…

原文地址:http://blog.163.com/net_worm/blog/static/127702419201002842553382/ 首先对Windows下的网络编程总结一下: 如果是服务器,其WinSDK调用分别为: WSAStartup() -> socket() -> htons() / htonl() -> bind() -> listen() -> accept() -> recv() / send() -> closesocket() -&g…

google: qt qml application architecture 有很多资源. 1 https://www.ics.com/blog/multilayered-architecture-qt-quick 这是一个大牛写的一种架构:A Multilayered Architecture for Qt Quick. 记录在下面:源代码在baidu网盘learning-qt-codes里面. The topic of application architecture rarely com…

The Event Systemhttp://doc.qt.io/qt-4.8/eventsandfilters.html Each thread can have its own event loop. The initial thread starts its event loops using QCoreApplication::exec(); other threads can start an event loop using QThread::exec(). Qt signals (…

Qt is well known for its signals and slots mechanism. But how does it work? In this blog post, we will explore the internals of QObject and QMetaObject and discover how signals and slot work under the hood. In this blog article, I show portions of Qt…

发布-订阅模式 发布-订阅模式,顾名思义,就像大家订报纸一样,出版社发布不同类型的报纸杂志不同的读者根据不同的需求预定符合自己口味的的报纸杂志,付费之后由邮局安排人员统一派送. 上面一段话,提到了发布-订阅模式三个比较重要的点: 发布者:报社 订阅者:读者 调度中心:邮局 不难看出上述过程中出版社和读者完全没有任何接触,在他们没有感知到对方的情况下通过邮局完成了整个流程,邮局就是传说中的中介(Broker) 那么使用发布-订阅模式的有什么优点呢?这里就简单的说两点:松耦合,可拓展性,稍后通过例子…

Flask备注二(Configuration, Signals) Flask是一个使用python开发Web程序的框架.依赖于Werkzeug提供完整的WSGI支持,以及Jinja2提供templates支持.Flask的设计理念是提供Micro以及方便的框架."Micro"是因为除了提供基本特性功能的实现外,其他的功能(例如数据库访问)都是通过extension来完成.方便的特点是因为提供了简单易用的必要特性和功能,提供的功能包含: 内置的开发服务器和调试工具. 集成单元测试支持.…