Programmer Think

Today, I'd like to share with you how to implement a launcher (program launcher) with Qt. Operation effect: github link: https://github.com/alamminsalo/qml-launcher There is little code, and the C + + part is about 100 lines of code. The following is the implementation process. 1. Create QML application In Qt Creator, click: -&gt ...

Recently, when compiling linux client, there was a bottleneck. Different CPU + operating system + kernel versions caused more and more cumbersome client maintenance. In order to improve maintenance efficiency and reduce maintenance cost, we decided to adopt static compilation. Because it was years ago, many errors encountered during compilation ...

Signal slot is one of the mechanisms that Qt framework is proud of. Skillfully use and understand the signal slot, and be able to design a very beautiful decoupling program, which is conducive to enhancing our technical design ability. The so-called signal slot is actually the observer mode. When an event occurs, for example, a button detects ...

1, Start with Hello World Cited examples #include <QApplication> #include <QLabel> int main(int argc, char* argv[]) { //Creating a QApplication instance is essential QApplication app(argc, argv); //Create a QLabel instance and assign Hello, world text to the constructor so that this text can be displayed on QLabe ...

In the project, a QThread object manages a thread. Generally speaking, the execution of a thread starts with the run () function. In Qt, there are two ways. The first is to inherit QThread and rewrite run() function. The second is to inherit QObject function and add time-consuming operations, and then call QObject::moveToThread() function. It i ...

describe QSpinBox is designed to handle integer and discrete value sets (for example, month names); Use QDoubleSpinBox for floating-point values. QSpinBox allows the user to increase / decrease the currently displayed value by clicking the up / down button or pressing the up / down key on the keyboard. You can also enter values manually. ...

What are modal and modeless dialog boxes I can't click other functions and interfaces. This kind of dialog box is called modal dialog box. There are some windows that can operate other windows, which belong to modeless dialog boxes. Next, create a new project. After the project is created, build the form as shown in the following figure in ...

Basic FTP client FTP download client implemented by QT C + + Environmental description FTP server: centos7 8 + vsftpd 3.0.2 installation settings see blog CentOS vsftpd settings Client: win10+QT 5.15.2 The implementation is not a fully functional FTP client, but the program has the need to download files from the FTP server. It mainly rea ...

1. Read data through serial port With the lower computer, MCU communication is inseparable from using serial port for communication. Qt also provides the class of serial port communication. When using, add this sentence import module in pro QT += serialport 1. The first step to connect serial ports is to obtain the names of all serial ports ...

1, Environmental preparation Compilation environment: Ubuntu 20 . 04 (Download address: https://ubuntu.com/download/desktop) QT Source code( QT5.9.5 Download address: https://download.qt.io/archive/qt/5.9/5.9.5/) Cross compiler( arm-2014.05) 2, Compilation preparation 1.decompression qt Source code 2.Configure the path of the cross compiler ...