In this Qt6 video we are going to learn about Qt6 Signals & Slots with QProgressBar, in the previous lesson we have learned about Qt6 Signals and Slots, Qt6 Signals and Slots is  mechanism for communication between objects in the Qt6 framework. it allows objects to communicate with each other by emitting signals and receiving them through slots. this mechanism is an essential part of the Qt6 framework, as it provides powerful way to design and implement complex applications. in Qt6 signal is a function that is emitted when  particular event occurs. for example a button may emit a signal when it is clicked. slot is a function that is called in response to a signal. for example a slot may be used to update  display when a button is clicked. signals and slots mechanism provides several advantages over traditional callback functions.

What is Qt6 QProgressBar ?

Qt6 QProgressBar is graphical user interface (GUI) widget in the Qt6 application framework that provides visual representation of the progress of a particular task or operation. it is typically used in applications that involves time consuming tasks such as file downloads or installations to give users an indication of how much progress has been made and how much time is remaining.

QProgressBar widget consists of horizontal or vertical bar that is filled gradually as the task progresses. amount of progress is typically represented as percentage and the widget may also display a text label that provides additional information about the task being performed.

In Qt6 QProgressBar has been improved with new features such as support for animation and the ability to customize the appearance of the widget with stylesheets. it also has improved performance and accessibility features to ensure that it can be used by all users including those with disabilities. (Qt6 Signals & Slots with QProgressBar)