qt beaglebone

Set the single startup method of the program in QT: 1. Copy the qtsingleapplication directory to the source code directory of the project and add the file to the code. 2. Add the QT-connected Library to the Pro file. Qt + = Network 3. Code in the main function # Include Qtsingleapplication app (argc, argv ); If (App. isrunning ()){App. sendmes

Qt Introductory Learning--QT 5 How to use the Help documentLearning graphic interface development, is certainly inseparable from the use of help documents, because it does not like C language as a few function interfaces, graphics interface can be used to describe the interface, the common we may be able to remember, the other really do not need to remember, use what to help document viewing usage.We use

These two days in summing up some of the previous problems encountered in project, just do not have a colleague asked me about Qt in the various widget window position is how to define, here is summed up:In Qt, all problems are divided into two different situations: one is the most commonly used qwidget system, and the other is the Qgraphicswidget system.①: In the commonly used qwidget system, the position

Today I want to use LUA for data manipulation in QTIt turns out that there are fewer articles using LUA in Qt, though it's simple, but it's written to provide a primer, by the way, to recordI'm using the QT Creator 3.4.2, with the mingw4.9.2 compiler.The LUA version I downloaded on the LUA website is 5.3.1First, in the QT to compile Lua, get. A and DLL these two

1. Drawing graphics [CPP]View Plain copy protected:void paintevent (qpaintevent *); void Widget::p aintevent ((qpaintevent *event) {qpainter painter (this);//this as a drawing device, that is, drawing on the part Painter.draw Line (qpaint (0, 0), Qpaint (100, 100)); } qpainter painter (this); Will immediately begin drawing on the device, call the Begin () function automatically, and then call the end () function in the destructor to finish drawing. Qpainter painter;//without parameters, you ca

I. Advantages of QT: 1. cross-platform2. the signal-slot mechanism is too elegant. Compared with MFC, its non-Form class also supports this mechanism. This designer's idea is admirable, and because its non-Form class also supports this mechanism, so many of its usage makes people feel bright, such as the use of qtimerevent, whether it is a form or not, can support timer, this is much more flexible than MFC3. Easy to use. Many mechanisms are similar to

QT is a product of trolltech. Trolltech is a Norwegian software company that mainly develops two types of products: a cross-platform application interface framework and an application platform for Embedded Linux development, can be applied to PDA and various mobile devices. QT and qtopia are two representative examples. QT is a multi-platform C ++ graphic user in

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

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

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

Assume that the following scenario is based on: In a program, there are two main logical functions: the UI interaction function block and the network function block used for network communication. When a new message arrives on the network, the network function block must notify the UI to display the refreshed information. When a user enters a new operation command or information, the UI function block transfers data by calling a network program. In non-QT