Built-in dialogs

Qt provides a rich set of built-in dialogs. They are as follows:

• QFileDilaog: This provides the user with a dialog that allows them to select files or directories
• QErrorMessage: This provides the user with a dialog that displays error messages
• QColorDialog: This provides the user with a dialog to specify or choose between colors
• QPrintDialog: This provides the user with a dialog that aids in printer and printing configuration
• QPageSetupDialog: This provides the user with a dialog that manages configuration for the page-related options on a printer
• QWizard: This provides a dialog framework for wizards
• QProgressDialog: This provides feedback on the progress of a slow operation
• QPrintPreviewDialog: This provides a dialog to preview and configure page layouts for printer output
• QMessageBox: This provides a dialog that is usually used to display modal information to the user requiring approval or cancellation
• QInputDialog: This provides a simple convenience dialog to get a single value...