qt hiring process

The traditional inter-process communication mode (shared memory...) can still be used in QT ..)· In the desktop environment, a more convenient and Object-Oriented communication mode is developed based on the traditional inter-process communication mode.-KDE environment: dcop-GNOME Environment: bonobo· Mechanism: the Linux IPC communication mechanism of the freede

Configuration process of Qt + OpenCV in Ubuntu1: opencv download source codeSelect AllCopyPut in notes Download the source code of the linux version at the following URL: http://opencv.org/downloads.htmlqtenvironment, which is self-assembled (see section 7th of this blog post)2: decompress and compile the source code Select All Copy Put in notes Cd opencv-2.1.0mkdir release cd releasecmake-D CMAKE_BUILD_TY

I. Event Processing Method in Qt 1. event processing mode 1 First, the event source generates events, and finally the event processor processes these events. However, you may ask, How can we easily process so many events in Qt? Imagine that if each event corresponds to the same event processor and different events are classified in the event processor, there are

Qt qprocess As a framework for almost language-level changes to C + +, the package is similar to cocoa, and, in fact, it feels like Qt has changed the language characteristics of C + + from cocoa to objective C, but the difference is that QT does not dominate the C + + world.Test1:#include #include #include int main (int argc, char *argv[]){QString program = "Cat

-installed MSVCRT, it will load its own copy.Microsoft.VC90.CRT This directory can be found in the VC installation directory, search for it.Assuming your app is installed in the AppInstallDir>YourApp.ExeYourdll1.DllYourdll2.DllQtCore4dll qtgui4. DLL imageformats> qgif4.qjpeg4. DLL qico4. DLL microsoft. Vc90. Crt> microsoft. Vc90. Crt. Manifest msvcr90. DLL msvcp90. DLL You can also download the installation directory under the YY voice reference file.YY Voice starting from the 4

First, talk about the Qt event processing, under the Windows platform, of course, without Win32:Basic structure of the WIN32 program:1. Registration window;2. Create a window;3. Start the event cycle consisting of GetMessage and dispatchmessage;4. The registered callback function WndProc is responsible for the corresponding various events;Windows maintains a message queue for each Windows program that is currently executing:　　The above is a simple int

The so-called IO is really just a data interaction with other devices. This concept may be clearer on Linux. Linux sees all devices as a file, so all IO comes down to the data interaction with the file. Similarly, there is data interaction with other processes, which is inter-process interaction.Why do we need inter-process interaction? Although Qt is a very larg

Sometimes need to do the framework integration of things, you need to integrate other clients like components into a client, similar to a software integration platform client, unified with a central management of the client to do similar to the control panel of the same thing to invoke different software. At this point, the corresponding different click-icon events must be embedded in the main interface. The following is a simple description of the computer program that is embedded in the system

\opencv_features2d300.dll}New OpenCV Configuration methodThe new OPENCV integrates previous libraries into 2 library files F:\opencv\build\x86\vc12\lib\opencv_ts300.lib,F:\opencv\build\x86\vc12\lib\ In Opencv_ts300.lib , only the two library files are loaded into the QT. Pro file, and no more CMake compilation is generated Qt/vs the available libraries. Most of the library files used in the past can be foun

Compilation environment and development process There are two kinds of IDE that can be used to develop QT, one is to use the VS + qt plugin, the other is to use the Qtcreator tool. The former is Microsoft's tools, with more easy to use, the disadvantage is that the signal slot support is not very good, need to hand-written, not automatically generated, there may

Tags: QT opencv Linux It is not a problem when using opencv to process images displayed on the qt label. 1. qimage must be used for display on QT. Convert iplimage to qimage Color Image Conversion Iplimage * fram; Qimage image (const uchar *) fram-> imagedata, fram-> width, fram-> height, qimage: format_rgb888 );

One: use Qlocalsocket Mode: First when a new instance is started, an attempt is made to connect to the same local server, and if the connection fails, the first instance process is created and a local server creates. Otherwise, proceed to exit. (. Pro plus QT + network) voidmainwidget::initlocalconnection () { is_running = false; Qcoreapplication::setapplicationname ("LocalServer"); Qstringserverna

QT has been studying recently due to the needs of the project. Signal and slot mechanism is a feature of QT, which allows the transfer of parameters between the two, in order to achieve communication between the objects. This parameter is present in the parameter list of the signal and in the parameter list of the slot function, respectively. It is important to note that if you bind a slot function to a sig

qt5.3 has fully supported mobile development, in addition to Mac,windows,linux. Also support mobile platforms such as Ios,android,wp,meego, this tutorial is the author based on his experience, from the beginning to tell how to advertise their app on iOS. Because there are relatively few articles in the country at the moment, there may be some omissions in the article, or not the optimal method.Software preparation: qt5.3, Xcode 5.1.1Compilation environment: Mac OSQt5.3 http://

/************************************************************************** * i.mx6 Linux Qt Boot process tracking * Disclaimer: * 1. source code source my-i.mx6; * 2. This article is only an analysis of the startup process, and does not explain why the startup process is such a problem. * 2015-6-13 Shenzhen Ching Nans

A similar error occurred compiling when opening a project21:46:44:the process "E:\Qt\4.8.5\bin\qmake.exe" exited with code 2.Error while Building/deploying project designers (KIT:WIN-QT)When executing step ' qmake '21:46:44:elapsed time:00:00.This is because the path of the project with Chinese, modified without Chinese can be compiled through!http://blog.csdn.ne

In QT programming, it is sometimes necessary to call an already written program to process the data in the program being written.The process needs to be used to invoke the already written program.Write the good one layout program beforehand:#include Put it under the Layout folderQmake-projectQmakeMakeGet the layout executable fileYou can invoke the Lauot program

For the installation process of Qt programming-general Linux technology-Linux programming and kernel information, see the following for details. System Environment: ubuntu 7.10 Gonme KDE-base First download a Qt. My qt-x11-opensource-src-4.3.0rc1 Then install: 1. Install the support file first: Sudo apt-get insta

QT Development (23)--Software development process First,Introduction to the software development processSoftware development process is a series of steps to ensure the smooth completion of software products, software products in the life cycle of management.The essence of the software development process is that the so

::connect (this,mainwindow::imageready,this,mainwindow::imgshow);2) Signal Release Emit ImageReady ();Timed Event Trigger release signalvoid Mainwindow::timerevent (Qtimerevent *event) { //determine which timer if (event->timerid () = = Id1) { Qdebug () 3) The implementation of the slot function: Displays the picture in the Labelimage.void Mainwindow::imgshow () { //qimg.load ("/home/yhzhao/desktop/12.png"); Ui->labelimage->setpixmap (Qpixmap::fromimage (qimg)); Q