Programmer Think

First, QT is a cross-platform application framework of c++ GUI. Application Framework: When encapsulated class libraries need to use some functions, they can call the corresponding interfaces directly. II. Establishment of QT Project 1. New Project - > Application - > QT Widgets Application ...

Quick Start for PyQt5 (8) PyQt5 database operations 1. SQLite database 1. Introduction to SQLite SQLite is a lightweight database that implements a self-contained, server-free, zero-configuration, transactional SQL database engine, mainly used as a database for mobile applications and small desktop applications.Official website:https://www.sql ...

I. Preface This control is mainly used as a simple picture browser. It can turn pages up and down to display pictures. Pictures can also turn on excessive effects such as transparency gradient, application scenarios such as viewing alarm pictures and running pictures. This control is not my original, from the network, I just revised a lot of BU ...

I. Preface In many graphics software, when switching pictures, you can bring animation transition or switching effect, which is more human-oriented. In fact, it is mainly dazzling, such as shutters, transparency changes, lower left corner flying in, etc. No matter how many kinds of effects, the core is around QPainter to carry out the correspon ...

When using the database, you need to view the list of drivers supported in the installed QT. Generally, you can view all the driver plug-in files in the plugins/sqldrivers folder in the QT installation directory. This is not the focus of this article, so I will not elaborate. The following should be added to the xxx.pro project file: QT ...

Creating mfc with vs is easier than qt, but the interface is far less attractive. 0 Create Solutions 1 Configuration environment Add two files that need to use opencv http://download.csdn.net/detail/songzige/9477119 Add it to the header file and source file, respectively In... Add several include references to the.Dlg.h file: #include ...

_ VA_ARGS__macro Instructions #define qWiFiDebug(format, ...) qDebug("[WiFi] "format" File:%s, Line:%d, Function:%s", ##__VA_ARGS__, __FILE__, __LINE__ , __FUNCTION__); The macro above uses qDebug to output debugging information, printf in non-Qt programs, syslog in daemons and so on. The trick is actually these macros _________________ ...

Preface Ring progress bar, used to show the current progress, in order to meet the needs of large screen UI customization, there used to be a ring progress bar, which can not meet the needs of the project, can only be re-customized, the previous progress interval can not be self-adaptive resolution, and the current progress corresponding to the ...

The code in this article comes from zetcode.com Events GUI applications are event-driven, and events are generated mainly by users. But events can also be generated through, for example, Internet links, window managers, or timers. When we enter the main loop of the program through the exec_() method, the main loop gets the ...

1. Prepare: 1.cmake-3.11.1-win64-x64 https://cmake.org/files/v3.11/  2.qt-opensource-windows-x86-msvc2015-5.6.3  3.vs2015  4.opencv-3.4.1-vc14_vc15.exe   https://github.com/opencv/opencv/releases/tag/3.4.1 2. Install software: 1.cmake installation (unzip to use) 2.qt installation, also install WDB http://www.codemac ...