Qt Widgets Designer UI files represent the widget tree of the form in XML format. The forms can be processed:| doc.qt.io
The QMainWindow class provides a main application window.| doc.qt.io
The QTextEdit class provides a widget that is used to edit and display both plain and rich text.| doc.qt.io
The QLabel widget provides a text or image display.| doc.qt.io
Describes the support for HTML markup in text widgets.| doc.qt.io
The QApplication class manages the GUI application's control flow and main settings.| doc.qt.io