Dialog Windows

Dialogs can be modal, in which case the user is required to provide necessary information before work in the main window can continue, or modeless. Modeless dialogs do not prevent the user from interacting with any of the other windows in the application.

Qt provides a set of ready-made dialogs for file, font, color-selection and more.

QColorDialog	Dialog widget for specifying colors
QFileDialog	Dialog that allow users to select files or directories
QFontDialog	Dialog widget for selecting a font
QInputDialog	Simple convenience dialog to get a single value from the user
QMessageBox	Modal dialog for informing the user or for asking the user a question and receiving an answer
QProgressDialog	Feedback on the progress of a slow operation

Custom dialogs can be easily created by composing regular widgets into a QDialog. These classes are specifically designed for building custom dialogs:

QDialog	The base class of dialog windows
QDialogButtonBox	Widget that presents buttons in a layout that is appropriate to the current widget style