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Qt parallel computing framework qtconcurrent and QT global Thread Pool

In addition to the qthread class, multiple threads are used in QT, And the qtconcurrent framework and qrunable class are also used. (Java is also used in QT ).Both qtconcurrent and qrunable are used together with the Global thread pool.Qtconcurrent and qrunable are only applicable to multiple projects, and they are highly independent.Qtconcurrent: Run () function is relatively simple. Put the item you want

The path to QT Learning (2) ------ string classes in QT

Label: style blog HTTP Io OS AR for SP Div Qstring Some basic usage of qstring Basic. cpp #include Output $ ./basic I love chessThe a string has 12 charactersI LOVE CHESSi love chessString Initialization There are several initialization methods for strings Init. cpp #include Output $ ./init The night trainA yellow roseA blue skyA thick fogA deep forestString element access Access. cpp #include Output $ ./access EeEOutside the range of the stringEvaluate the string length Length

In opencv +, the windows created by cvnamedwindow (char *, int + flag) + display QT performance + or + disable QT Performance

Display the QT performance of the windows created by cvnamedwindow (char *, int flag), for example, display coordinates, pixel values, amplification, pan, and save, Method 1:Select with_qt when compiling the opencv library. Method 2: After the regular library of opencv is created (that is, the library compiled by with_qt is not selected), you can go to the original directory of c: \ opencv231 \ opencv \ modules \ highgui \ SRC,Copy these three files:

QT Learning Pathway (qinputdialog): QT Standard dialog box

This is the last part of the Qt Standard dialog box. As the name shows, Qinputdialog is used to receive input from the user. Qinputdialog provides a few simple static functions that are used to quickly create a dialog box, just as Qcolordialog provides the GetColor function. First look at the GetText function: bool isOK; QString text = QInputDialog::getText(NULL, "Input Dialog","Please input your comment", QLineEdit::Normal,"your comment",isOK); if(

Remove QT program under Eglfs left and top white border (remove QT application The border line on Eglfs)

I have a previous article on the QT5.5 when the rotation of Eglfs, this is a sister article, the introduction if the Eglfs under the white border.The first thing I think of is the use of Qt stylesheet, experimented with again, padding attribute is obviously not, the margin property is not, the border property is not. And then Qt::framelesswindowhint. Unfortunately, you can't change that nasty white border.

QT Learning Path-QT Server-mysql database Related issues collection (1)

Tags: causes the server SQL code stat frequency status database failedDate: 2017-04-07Exception information:Error-rtlwerpreportexception failed with status code:-1073741823. Would try to launch the process directlyE:\VictorPrivate\CommPlat\Bin\A2CMangerServer.exe exited with code-1073741819Scene:QT connection MySQL process, the operation database often appear MySQL server has gone exception, originally thought every gone away after, then start again, result because database connection is singlet

Compile, install, and configure QT in Linux

I plan to do embedded image processing. I plan to use embedded Linux + OpenCV + QT. I started to use OpenCV yesterday and checked QT today. QT will first get the content under Linux and try to get the basic information before going home, then it can run on the board. Qt details: click hereQt: click here Recommended rea

QT 4.6.2 integrates with Visual Studio 2005 (compilation method, and problems encountered in the middle)

In Thyssen almost half a month, haha, time is fast, live very substantial, recently study QT, first of all, must learn to install, the most basic will not let alone the following. Gossip less, go to the point, Basic installation steps on the Internet, but refer to a majority of the situation is not installed, there is always such a problem, basically I refer to the following steps:Qt 4.6.2 Although the LGPL protocol has been added, it also prevents us

The past and present of Nokia's Development Framework Qt

Editor's note: This article invites a Qt developer toartist to write a Review and Outlook article on Qt for ifanr. Nokia has also officially released the latest version 4.7 of Qt, a cross-platform application and interface development framework. This version unifies the development environment of Symbian and MeeGo. For the Symbian system,

"0 Basic Learning QT 4 Programming" a book reading guide for your reference. __qt

Reading guide Qt is a cross-platform application and UI framework that can be used to write applications that are deployed across different desktops and embedded operating systems without having to rewrite the source code. Since the release of Qt 4.5, with Nokia continually developing more and more beloved product and experience strategic concepts, the QT product

Qt learning path (37): Qt container-related storage container

Today we will talk about the associated storage containers in the Qt container class. The so-called associated storage container stores binary groups rather than a single object in the container. Binary groups are generally expressed as 650) this. width = 650; "onclick = 'window. open (" http://blog.51cto.com/viewpic.php? Refimg = "+ this. src) 'ign =" top "src =" http://www.bkjia.com/uploads/allimg/131228/1R12942Z-0.gif "/> map. insert (" eins ", 1 )

Qt for beginners-calling external C language modules in QT

Call the compiled C language module, PASS Parameters, and print the returned results. C language module code: /********** Test. c ********** // *********** after compiling with GCC, the executable file test is produced and stored in .... */# include Qt code: /********MyTest.h***********/#ifndef MYTEST_H_#define MYTEST_H_#include /******* Mytest. CPP **********/# include "mytest. H "# include /*********** Main. CPP ************ // ********* afte

Implementation of Recursive Algorithms in QT (using QT to traverse folders)

Header file: # Include Example program: // Recursively traverse the folder, find all DLL files, and call the registercomfile (qstring dllfilepath) function // scomfilepath: name of the folder to be traversed: int psm_comregister: searchdllfile (const qstring scomfilepath) {qdir Dir (scomfilepath); If (! Dir. exists () {return-1;} // get all files and file names, but remove them. and .. folder (which is the default one in QT) dir. setfilte

Familiar with QT development environment-Hello QT

1. Open QT creator and create a project 2. Select a project template 3. Click "select" and enter the project name. 4. Next, next, complete 5. Right-click the project folder, add a new file, and name it main. 6. Open main. cpp and add code. # Include 7. Run

How to obtain QT speech score by QT Voice Integral tutorial

This integral is conditional on the need for you to stay in the host's house for a certain amount of time to get points, specific tips for you to share one. 1, we open QT, and then casually login into a room, and then if we want to listen to listen to here, if not listen to click to set mute as shown in the following figure 3, as long as in the room for an hour we can get an integral, a day can get up to 5 points Note: the rule for getting poin

Familiar with QT development environment--hello QT

1. Open Qt Creator, new project 2 Selecting a project template 3. Click "Select" to enter the project name 4. Next, Next, complete 5. Select the project folder, right-click, add new file, name main 6. Open Main.cpp, add code [CPP] view plain copy print? #include #include 7. Running Original address: http://blog.csdn.net/duxinfeng2010/article/details/8227749

Build and compile Qt in VC Environment

I. Installation 1. Download a qtsource package that can be used in Windows environment on trolltech.com, such as qt-win-opensource-src-4.3.4.zip, and decompress it (for example, extract it to F:/Qt-4.3.4) 2. add system environment variables, add the bin path of QT (F:/Qt-4.3.4/bin) in path, add the new variable qtdir

Qt-based games-battle against bacterial viruses

();signals: public slots:private: QSound *backgroudSound; QObject *parentWidget;}; In this way, the abstract function run () can play the desired sound at the end of the game. void BackGroundMusicThread::run(){ qDebug() The buttons are implemented by inheriting the mouseeven In the Widget: void mouseMoveEvent(QMouseEvent *); void mousePressEvent(QMouseEvent *); void mouseReleaseEvent(QMouseEvent *); void keyPressEvent(QKeyEvent *); void keyReleaseEvent(QKeyE

Qt-related resources (books, forums, blogs, etc ...) Organize...

Chinese name: Wisdom of inquiryEnglish name: how to ask questions the smart way English link 1: http://www.beiww.com/doc/oss/smart-questions.html2: http://community.csdn.net/IndexPage/SmartQuestion.aspx Although this article is not closely related to QT, I am still in the front row. I hope you can read this article before asking questions. It is very classic and it is not a waste of time. That's it. Nokia official

Introduction to the QT 5 framework

The article original in Qter Open source community (www.qter.org), author Yafeilinux, reprint please indicate the source!one, see all modules in HelpOpen Qt Creator, go to its help mode, then select directory mode to view, open the "Qt 5.2.0ReferenceDocumentation" page. A complete introduction to QT 5.2 is provided here, and all of its contents are categorized. W

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