Qt learning 5

It achieves the same layout effect as the previous one, but this time it is achieved through qgridlayout,CodeSimple and refined. # Include # include # include int main (INT argc, char ** argv) {qapplication A (argc, argv ); qwidget * w = new

Solve dm3730 automatic login to Root Account

The project is almost implemented. At last, we need to port the entire system to the platform andProgramAuto Start. Previously, omap3530 was used to log on to the root account by default when the system was started. To Enable Automatic startup of

Dictionary entity in Database Design

Today, during the analysis, I found something that I often encountered before. I think it is necessary to put forward it specifically. This is called a dictionary entity. I dare not say how to define this entity. What I want to talk about is how to

Let's talk about this time.

Yesterday, May 8: I watched it all morning.AlgorithmAfter all, I went to ACM this week. I had a lot of psychological pressure and had no idea about the results. In the afternoon and evening, I had two Information Confrontation sessions held by

Convert scanned formatted files to XML files

Today is a great day. After seven days of hard work, we finally successfully analyzed the scanned file as an XML file, greatly improving the data processing speed. In the application field of Hospital Information Systems, you can make standard

Opencv combines an image and a video

After merging the two images, I suddenly wanted to try merging a static image and a video. The process encountered some problems. In the red font, the image needs to be saved and then displayed. This is very inefficient. Cvcopy (frame, des

Opencv concatenates two images

The following are some knowledge points: (1) path setting: Generally, you need to save the folder containing images to the project directory, that is, ensure that the folder and debug are under the same root directory; (2) cvsetimageroi and

My path to "Learning"

In the past few months, before I went to bed, I had to watch the novel Journey to the West. I woke up this morning and suddenly felt that I was learning the story. There are too many things you need to do every day: Long teams of work tasks, deep

ProFTPD Setup Guide

Install ProFTPD # Aptitude install ProFTPD-mod-LDAP This ProFTPD has already integrated the LDAP module. You do not need to compile the LDAP module by yourself, which is very convenient. We can see that/etc/ProFTPd contains LDAP. conf, which does

Discrete Fourier Transformation

Principle: Using Fourier transformation for an image is to divide it into two parts: sine and cosine. That is, the image is converted from the spatial domain to the frequency domain ). The theoretical basis of this conversion comes from the fact

Qt Learning 1

I mainly follow Http://www.kuqin.com/qtdocument/tutorial.html This is for learning. Some problems have been found. The QT version used in this tutorial should be earlier than 4.0, so some current versions cannot be used.Qt

My path to Mathematical Modeling

Today, I am cleaning up my computer and suddenly find that the mathematical modeling Summary after last year's competition is poor !! The University participated in two national mathematical modeling competitions for higher education, both of which

Thank you for your comments and suggestions!

This is my first blog. I will post my own blog in the future. As I am not used to writing blogs, the narration is not organized, and there are many bugs in technology. If you have any problems, contact me and we will discuss the common progress

Install the Xilinx ISE 11.04 guide on Ubuntu 13.1 With Error Correction Methods

Installation environment: Ubuntu 11.04 Installation version: Xilinx ISE 13.1 1. Download ininx_ise_ds_13.20.o.40d.1.1.iso This is a Windows/Linux dual-platform cracked version, about 4.94g. 2. Install and crack Ubuntu 11.04 sudo mount -o loop

Qt learning 4

You can use a class to implement a simple layout. # Include # include # include # include # include # include # include # include class mywidget: Public qwidget {public: mywidget (qwidget * parent = 0, const char * name = 0) ;}; mywidget ::

Use of threads in the class

I wrote an example myself. I don't know if this method is a common method. Please contact us. Points contained in the example: 1. Create a thread and a semaphore in the class function. 2. Call functions in the class in the thread. 3. Check the

Disadvantages and evolution of sqlcommandbuilder (1)

In the. NET environment for database development, looking for a component that can automatically generate Transact-SQL, I believe everyone will think of the sqlcommandbuilder class. It allows you to modify data in dataset and generate Transact-SQL

Some operations on the process in the job

1. Windows provides a job kernel object that allows us to combine processes and create a "sandbox" to limit what processes can do.2. You can think of a job object as a process container. It is equally useful to create a job that contains only one

Three methods for enabling winform once

In development practice, we sometimes restrict the operation behaviors on some forms. For example, we allow users to open a form only once. For this kind of behavior, we cannot say to the user, "You can only click this menu item once. When the

Description of the networking and remoting namespaces in the. NET Framework

Recently, I was engaged in network development. After a break, I sorted out the network-related namespaces in the. NET Framework Based on the msdn documents and shared them with you: System. netProvides simple programming interfaces for multiple

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