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The way of Qt learning (i.)

First, Introduction When it comes to QT, we have to say Qt and Qt creator. Take a look at their profile. qt:1991 a cross-platform C + + graphical user Interface application Development framework developed by QT Company. It can either develop GUI programs or be used to develo

Win32 qt vs. Lua: Configure QT under the LUA runtime environment

In simple terms, LUA's dynamic features complement the functionality of C + +. Of course, it depends on how you use it.I often use QT, so I'm ready to combine QT with Lua. Imagine calling the following code in a LUA script:W = qwidget:new () w:show ()And then pop up a qwidget window, what a touching thing it is.OK, let's start configuring the environment below.1. Download Lua 5.1. The current version is 5.2

QT & VS2013 Error: There ' s no Qt version assigned to this project for platform Win32

If you want to know about QT and VS2013 development environment, you can turn this page.Here the main sharing environment has been built successfully, in the construction of projects encountered error solution."1" Qt and VS2013 development environment construction times wrongThe error interface is as follows:Note: In the upper left corner of the dialog box, QT Vi

How to Use QT encryption and decryption class library QCA (QT cryptographic Architecture)

Introduction: QCA: QT cryptographic architecture is a very good class library for encryption and decryption on the qt platform. However, there are still few documents and blogs about QCA in China, if you are not familiar with QT and Unix development, you may encounter some problems when using this open-source class library (as you know, there are still many probl

"Qt Learning Notes" characters, strings in 6.Qt

array of wchar_t to hold Unicode charactersSecond, the character, string in QTQt as a cross-platform framework, the design of the first consideration of the character of the problem;It encapsulates a qstring representing a string, which is a UTF-16 encoded class, and encapsulates a Qchar class that represents a wide character;Then there's the problem: the code in VS is GBKSo just assign the string to qstring as follows:QString str = "A section of Chinese"; Ui.lineedit->settext (str);Running out

How does the Qt application process Chinese parameters during drag-and-drop, and qt drag-and-drop Chinese parameters?

How does the Qt application process Chinese parameters during drag-and-drop, and qt drag-and-drop Chinese parameters? You have developed an application using Qt. When you drag and drop a file to your exe and start your application, the main () function may receive Chinese parameters. How can this problem be solved correctly? The Code is as follows: QTextCodec

Qt recursive non-recursive traversal file, qt recursive non-

Qt recursive non-recursive traversal file, qt recursive non- The biggest advantage of qt is that it is cross-platform. Although it is said that qt is well-designed and has a wide range of documents, qt has never been so cool. However, cross-platform architecture can save a l

QT multithreading notes and qt Multithreading

QT multithreading notes and qt Multithreading 1. it is not convenient to use QThread when QT multithreading involves a large amount of data interaction between the main thread and sub-thread, because the run () function itself cannot accept any parameters, therefore, data can only be obtained through the interaction between the signal and the slot. If only the si

Design of the waiting dialog box in Qt and the waiting dialog box in Qt

Design of the waiting dialog box in Qt and the waiting dialog box in Qt A waiting dialog box is used to prompt the user to operate the Qt program for a long time.Qt has a standard QProcessDialog to partially implement this function, but the disadvantage is to calculate the progress. Second, you can cancel it halfway. Therefore, we generally use a custom dialog b

Win32 QT and Lua in use (ii): Using QT classes in LUA scripts

The words are connected to the article. After successfully configuring Qt+lua+tolua, we can implement classes that use each QT in a Lua script. Look directly at the code.#include "include/lua.hpp" #include The author writes several functions of qwidget into the form of static and binds them with Tolua. This makes it possible to use a bound function smoothly in a LUA script. The contents of the following LUA

QT attribute System (QT property systems)

Qt Property system QT provides a clever property system similar to the property systems supported by some compilers. However, as a platform-and compiler-agnostic library, QT cannot rely on non-standard compiler features such as __property or [property]. QT's solution can be supported by standard C + + compilers under any QT

QT cannot use OpenGL solution after installing QT and OpenGL under Linux

My system for Ubuntu14.04, with Apt-get installed the implementation of OpenGL MESA,QT is the official website to download the run file to install.OK, now two are all there, so try to write OpenGL code under QT.Before trying to paste the code in vim and then compile, the test succeeds is a statement containing one of the following compilation options.1 GCCBut directly paste the code into the QT creator Clic

[Figure] install the Qt environment and Qt Creator development tools in ubuntu

[Figure] installing the QT environment and the QT creator development tool in Ubuntu thanks to snail mail for posting it on 09-10-13 and being read for 2612 comments and 0 comments [Lottery Q A activities 2011-4-1 ~ 4-18] Open Source people seize the opportunity always (clock) by you First install qt4 and use QT Creator for development demonstration In termin

Jetson TK1 Development Environment Build (v) compiling QT 5.5.1 qt Creator3.6.0

Because the QT Creator installation relies on the QT library, it is important to ensure that the QT5.5.1 is already installed. 1. Download the Creator3.6.0 resource file: Qt-creator-opensource-src-3.6.0.tar.gz Can be obtained at the following Web site: Http://download.qt.io/official_releases/qtcreator/3.6/3.6.0/qt-

Creation and calling of Qt shared library (Dynamic Link Library) and static Link Library, and qt static Link Library

Creation and calling of Qt shared library (Dynamic Link Library) and static Link Library, and qt static Link Library Qt Creator compiler, win7 64-bit System Environment 1. Create a shared library: Create a file or project-> select Library and c ++ Library-> select shared Library-> next (Project name: sharedlib) Generated directory structure: Modify the code in

Solution for configuring OpenCV library and qt cannot start the terminal simulator 'xtermin' in qt under Fedora14

Solution for configuring OpenCV library in qt of Fedora14 and failing to start terminal simulator 'xtermin' in qt: 1 in Fedora14 (Linux, gedit/usr/share/qt4/mkspecs/default/qmake. the conf file contains the following two sentences: QMAKE_INCDIR =/usr/include/opencvQMAKE_LIBS =-lcvaux In februa 14, qt configures the OpenCV library and

QT DLL Summary (ii)--Create and use QT DLL (reprint)

Let's talk about the method of calling the QT Dynamic link library, mainly including:1, explicit link DLL, call DLL global function, using QT Qlibrary method2. Show link DLL, call DLL class object, member function. (A call to a class member function can be implemented through an object)① uses the method of virtual function table, which is also the method used by COM, using QT's qlibrary technology call;② is

[Qt Summary] Final Summary, qt Summary Final

[Qt Summary] Final Summary, qt Summary Final 1. content about Qt applications: Refer to the previous article: [Qt Summary] terminal remote client upgrade 2. Upgrading files is a processing method in hex format: for files in hex format, If You Want To directly read the files, you need to: 1. Read data 2. Find the requi

QT display Image zoom in and out of the move (all the functions provided by QT directly)

This article original in www.yafeilinux.com reprint please indicate the source.Now let's implement the picture on the window and learn how to pan, zoom, rotate, and twist the picture. Here we use the Qpixmap class to implement the image display.First, the use of qpixmap display pictures.1. Make a copy backup of the previous project folder, and here we rename the project folder to Painter05. (as I've said before, it's a good habit to back up the engineering catalog often.)2. Create a new folder i

How to use MySQL and statically compile Qt in Qt How to add MySQL (2)

Tags: arc base experience creat DDD database technology sharing include cannotFollowing the continuation of the previous article:The previous article said, "finally write a demo of my SQL Project discovery can run successfully, but could not find the database file created reason to find"Note that the corresponding code for the above problem is as follows:#include  The cause of the problem is:Query.exec ("CREATE TABLE student (ID primariy key, name varchar (20))");This line of code is now correct

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