Qt → Qt WinAPI - Lesson 010. How to check if file writing is prohibited by another process.
Surprisingly, in the course of my professional activity, I stumbled upon one interesting feature of QFile. With it, you can check whether it is possible to read or write information to a file. But at the same time, QFile ignores read and write permissions of the file if the file is opened by several instances of the same program. This means that if the file is opened in another instance of the program, then QFile will determine this file as readable or writable, and will also be able to write to the file successfully.
Django → Django - Tutorial 054. How to create a polymorphic system of dynamic widgets
The other day, I solved the problem of adding dynamic widgets on the site with the ability to add different types of widgets, as well as with the possibility of further unlimited expansion of the widget set by adding models of specific implementations.
The system is such that there is one class Widget , which, depending on the type selected when creating it, refers to a specific implementation model, for example HTMLWidgetImpl , which contains some special parameters, and also knows about its template for rendering. Widget in the site template when calling the render() method refers to the specific implementation and its method render()** through the type.
This approach allows you to write an extremely simple code for the template, as well as organize the code so that adding new widgets will consist in adding a new data model, as well as correcting a number of places in the code, or rather updating them. Which in essence will become a routine task and will remove from the programmer the need to come up with something new.
That is, in this article I want to show not only the solution to some problem at the level of program code, but also to show the approach to architecture planning when solving such problems.
Qt → Сборка Docker из QtCreator
Docker, Qt, QtCreator, build, cmake
На своем компьютере для разработок нажимаете Ctrl+R (Run (Выполнить)) в QtCreator, чтобы создать и запустить ваше приложение Qt. Если вы хотите запустить приложение во встроенной системе, то вы должны выполнить четыре задачи:
• Создаете кросс-приложение Qt для целевой встроенной системы в контейнере Docker.
• Останавливаете приложение в целевой системе.
• Копируете приложение с ПК разработчика в целевую систему с помощью scp.
• Запускаете приложение в целевой системе.
Хотели бы вы нажать Ctrl+R в QtCreator и заставить QtCreator выполнить для вас четыре вышеуказанных шага? Конечно, хотели! В этой статье будет рассказано как это сделать. Запуск приложения во встроенной системе будет аналогичен запуску приложения на ПК.
Python 3 → How to Hide Firefox [selenium] in python
In this tutorial, we’ll learn how to Hide selenium firefox in python.
Django → Django - Tutorial 053. Adding Counters to Models in the Django Admin Panel
The other day, I started working on a content moderation application on the site and solved the problem of adding counters in the administrative panel.
It looks like this now
The task itself is trivial, but as it turned out there is a nuance, without knowing which, this task will not work right away.
Qt → Представляем приложение Qt Quick 3D Benchmarking
Django → Django - Tutorial 052. Redefining a User Model
Python, QuerySet, django, Model
There are various options for working with a user model for creating a user profile and adding some specific information, for example, a profile photo. One way is to add a profile model with the OneToOneField field for the user. This option is simpler than a proxy model or overriding a user model. But for me personally, redefinition of the user model turned out to be more effective in terms of organizing code and writing various methods that allow you to extract the necessary information from the user object in templates without resorting to writing template tags.
Therefore, let's consider exactly the option of redefining the user model in a project in Django
Qt → Безверсионные цели CMake (Qt 5.15)
Разработчики Qt работают над тем, чтобы портировать Qt 6 на CMake в качестве внутренней системы сборки. Хотя до Qt 6 еще несколько месяцев, вы уже можете увидеть некоторые преимущества этой работы в Qt 5.15. Кристиан Адам (Cristian Adam) уже писал в блоге об улучшениях в CMake 3.17 и о том, как, например, улучшился AUTOMOC в QT 5.15. Эта статья о том, как вы можете подготовиться к Qt 6 в своих проектах CMake.
Django → Working with Django model ChoiceField
Today we going to explore how to work with model ChoiceField in Django.
To better understand, let's see the following examples.
EVILEG → Refusal of advertising networks online EVILEG (Google Adsense, YAN Yandex, etc.)
So, perhaps the most joyful moment has come for many users of the EVILEG website. Namely, disabling advertising networks on the site.
Perhaps you would like to know the reasons for such an interesting behavior of the site owner, who, it would seem, was supposed to bring some kind of income through advertising networks.
In fact, the stars came together, and several reasons came out, and here they are.
Qt → Выпущена Qt Design Studio 1.5 Beta
Разработчики Qt рады объявить о выходе бета-версии Qt Design Studio 1.5
Qt Design Studio - это инструмент проектирования и разработки пользовательского интерфейса, который позволяет дизайнерам и разработчикам быстро создавать прототипы и разрабатывать сложные пользовательские интерфейсы. Как дизайнеры, так и разработчики используют Qt Design Studio, и это делает сотрудничество между ними намного проще и более рациональным.
Python 3 → How to check list is empty in python
Hello guys, today we going to learn how to check if a list is empty
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