Qt → Qt 5.13 Release

Qt, Blog, Releases, Выпуск

On June 19, Qt Company released Qt 5.13. As always, releases come with new features, updates, bug fixes, and improvements. In Qt 5.13, Qt Company also focused on a tool that makes designing, developing, and deploying software with Qt more …

Qt → Qt 5.12.4 released with OpenSSL 1.1.1 support

Releases, openssl, OpenSSL, Qt, Выпуск

Qt 5.12.4, the fourth release of the Qt 5.12 LTS patch, was released today. The Qt 5.12.4 release contains a number of bug fixes as well as performance improvements along with a number of other enhancements. As an important new …

Qt → Qt Support - Aligning Chart Views to Each Other

Plot, Blog, Chart, Qt

One thing that comes up in support from time to time is that when you have multiple chart types, it's good to align them to each other so that the actual chart size is the same for both charts. If …

Software → Release of C ++ / QML application deployment utility CQtDeployer v1.2.3

Qt, C++, cqtdeployer, QML

After a month of development, a release of the cross-platform utility CQtDeployer v1.2.3 has been prepared. The source texts of the CQtDeployer components are shipped under LGPLv3 licenses.

What is new:

• Added support for qt.conf for Windows builds

qt.conf is …

Algorithms → DFS (Depth-first search) algorithm

Tree, Дерево, Алгоритм

Travel means visiting all nodes of the graph. Depth Traversal or Depth First Search is a recursive algorithm for finding all the vertices of a graph or tree data structure. In this article, with the help of the examples below, …

Qt → Data encryption by RSA algorithm in Qt with public and private keys without binding to OpenSSL

RSA, Public key, ge, шифрование в qt, публичный и приватные ключи, crypto, private key, AES, cryptography, QuasarApp, Qt, asynchronous encryption, Qt-Sekret

Introduction

In this article there is a way how to organize message encryption, as well as use RSA (public and private keys) algorithms without libraries similar to OpenSSL, QCA or LibSodium.

How does it work?

Why is it necessary?

There …

Qt → Printing the exact contents of a QTableView (QTableWidget)

QPrintPreviewDialog, QTableView, print, QTableWidget, Qt

Good day.
Again as a note.
There was a need to print an exact copy of the contents of QTableWidget with delegates, etc.
It turned out the following:

void FinalPage::on_pushButtonPrint_clicked()
{

    int width = 0;
    int height = 0;
    int …

Qt → Introduction to QtCoAP

QtCoAP, M2M, Qt

It is a client-side implementation of the Constrained Application Protocol (CoAP) for the Internet of Things. The library provides a quick and easy way to use the CoAP protocol in your cross-platform Qt applications. As previously announced, QtCoAP will be …

Algorithms → Graph. Data structure.

Tree, Алгоритм, Дерево

The graph data structure is a set of nodes that have data and are connected to other nodes.

Let's try to understand this with an example. On facebook, everything is a node. This includes user, photo, album, event, group, page, …

Algorithms → Binary Search Tree (BST)

Дерево, Tree, Алгоритм

Binary search tree is a data structure that allows you to maintain a sorted list of numbers.

• A binary (binary) tree is called because each tree node has a maximum of two child elements.
• A search tree because it can …