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Qt Designer 5 Download: How to Install and Use the GUI Design Tool


If you are looking for a tool to create graphical user interfaces (GUIs) for your applications, you might want to check out 
Qt Designer
. In this article, we will show you what Qt Designer is, why you should use it, how to download and install it, and how to use it to create a GUI application.


What is Qt Designer and why use it?


Qt Designer is a tool for designing and building graphical user interfaces (GUIs) with 
Qt Widgets
. Qt Widgets are a set of standard UI elements that 
Qt Widgets are a set of standard UI elements that can be used to create cross-platform applications with a native look and feel. Some examples of Qt Widgets are buttons, labels, text boxes, sliders, menus, dialogs, and so on.


Qt Designer offers many benefits for developers, such as:




A 
WYSIWYG editor
 that allows you to compose and customize your windows or dialogs by dragging and dropping widgets from the widget box.


A 
seamless integration
 with programmed code, using Qt's signals and slots mechanism. Signals and slots are a way of communicating between objects, where a signal is emitted when an event occurs, and a slot is a function that responds to the signal. You can connect signals and slots in Qt Designer using the edit mode, or in your code using the connect method.


A 
support for custom widgets and plugins
. You can create your own widgets by subclassing existing ones, or by using the Qt Designer's widget promotion feature. You can also use plugins to extend the functionality of Qt Designer, such as adding new widgets, property editors, or language support.


A 
compatibility with both Qt4 and Qt5 versions
. Qt Designer 5 can work with both Qt4 and Qt5 libraries, as long as you have the corresponding development tools installed on your system. You can also switch between different Qt versions in Qt Designer's preferences.




How to download and install Qt Designer 5?


Qt Designer 5 is part of the 
Qt framework
, which can be downloaded from the 
official website
. You can choose between different options, such as:




The 
online installer
, which requires an internet connection and allows you to select the components you want to install. This is the recommended option if you want to have the latest updates and features of Qt.


The 
offline installer
, which is a stand-alone binary package that includes Qt libraries and Qt Creator. This is a convenient option if you want to have a fixed version of Qt or if you have a slow or unreliable internet connection.


The 
source packages
, which allow you to compile Qt from source code. This is an advanced option if you want to customize or modify Qt for your specific needs.




You can also launch Qt Designer directly from 
Qt Creator
, the integrated development environment (IDE) for Qt applications. Qt Creator is a powerful tool that provides features such as code editing, debugging, testing, version control, and project management. You can open Qt Designer from Qt Creator by selecting Tools > Design Mode, or by double-clicking on a UI file in the project explorer.


How to use Qt Designer 5 to create a GUI application?


Using Qt Designer involves four basic steps:





Choose your form and objects from the widget box
. The widget box contains all the available widgets that you can use in your GUI. You can drag and drop them onto your form, which is the main window or dialog of your application. You can also use the filter box to search for a specific widget by name or category.


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Qt Designer 5: The Ultimate Guide to Download and Install

Keith Trigger