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: The QColorDialog class provides a dialog widget for specifying colors.

• QFileDialog: The QFileDialog class provides a dialog that allow users to select files or directories.

• QFontDialog: The QFontDialog class provides a dialog widget for selecting a font.

• QInputDialog: The QInputDialog class provides a simple convenience dialog to get a single value from the user.

• QMessageBox: The QMessageBox class provides a modal dialog for informing the user or for asking the user a question and receiving an answer.

• QPageSetupDialog: The QPageSetupDialog class provides a configuration dialog for the page-related options on a printer.

• QPrintDialog: The QPrintDialog class provides a dialog for specifying the printer's configuration.

• QPrintPreviewDialog: The QPrintPreviewDialog class provides a dialog for previewing and configuring page layouts for printer output.

• QProgressDialog: The QProgressDialog class provides 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 QDialog class is the base class of dialog windows.

• QDialogButtonBox: The QDialogButtonBox class is a widget that presents buttons in a layout that is appropriate to the current widget style.