QML → QML - Tutorial 032. Create Custom QuickItem from C ++ using OpenGL tools

QQuickItem, QQuickPaintedItem, QML, Qt, C++

In tutorial 024 , I showed an example of creating a custom QML object in C ++ using QQuickPaintedItem , which has a paint() method, and in this paint method, you can draw the necessary objects on the graphics scene …

Qt → Qt - WinAPI. How to show a running application on top of your application

WinAPI, Qt, winId

There was at me somehow a problem to operate applications - the services written on Qt, from application - a kernel written also on Qt. And, if the service application is not running, then it should be started, and if …

Linux → Secrets of Writing Good Documentation

Документация

At the upcoming APIStrat conference in Portland, Taylor Barnett will explore various documentation design principles and discuss best practices.

Taylor Barnett, community engineer at Keen IO, says practice and constant iteration are key to writing good documentation. At the upcoming …

QML → Running Qt Applications in a Browser Using the WebGL Plugin

QML, Qt, WebGL, 3D

An interesting feature that came in Qt 5.10 is a new Qt back-end that uses WebGL for rendering. This allows Qt applications (with some restrictions) to run in a web browser that supports WebGL.

What it is?

The new back-end …

Qt → Blocking serial port. QSerialPort + QThread.

Qt, QSerialPort, QThread

I had the task of writing software for controlling the radiator of the X-ray. Namely: realize the protocol of data transfer between the PC and the radiator of the X-ray and create the user-defined functions "Set parameters", "Enable X-ray", "Switch …

Qt → Qt / C ++ - Tutorial 072. An example of a vector editor on Qt

QGraphicsItem, QGraphicsScene, QGraphicsView, Vector Editor, QGraphicsObject

Quite often there are questions in one way or another related to the work of the graphic scene, with custom figures, drawing lines on the graphic scene, and even all sorts of broken lines. And then I remembered about one …

C++ → C++ - Tutorial 011. Exceptions

C++, throw, catch, exception

What is an exception? This is a situation that is not provided by the standard behavior of the program. For example, an attempt to access an element in the Vector class (which we discussed in the article about classes ), …

C++ → C++ - Tutorial 010. Namespaces

namespaces, C++

In addition to functions, classes, and enumerations, C ++ provides namespaces as a mechanism for controlling and controlling the repeated names of functions and classes. For example, if you name some of your functions with names that intersect with the …

SFML → SFML - Tutorial 001. Connecting the SFML library to a project on Qt

SFML, Qt, C++, QWidget

SFML is an object-oriented analog SDL. The library provides easy access to the systems of input-output, audio, data network, as well as to OpenGL functionality.

And what if, in addition, to add to this library also the Qt functionality, get …

Qt → Qt, Build IBASE driver (FireBird) Win10 Firebird 2.5

QIBASE, ming32, Qt, драйвер

Information does not pretend to be super useful, but it can help save time when setting up.

We have:
Win10 64 bit
Firebird 2.5 (win32)
Qt Creator 4.2.1
Based on Qt 5.8.0 (MSVC 2015, 32 бита)

mingw32-make.exe  -v
GNU Make …

Django → Django - Tutorial 027. Implementation Google reCAPTCHA

Google, reCAPTCHA, Validation, Google API

I added to the site reCAPTCHA when registering users and some other actions of anonymous users, and then too many robots are registered on the site.

The adding of reCAPTCHA was done through the decorator function, so that it was …

Django → Django - Tutorial 026. Setting up the Minification of CSS and JavaScript code in PyCharm

Minification, CSS, JavaScript

When developing a website, it is often noticed that the site should have a short response time to the user's actions, so they apply various methods to improve the site's performance, such as caching data on the user side, using …