The text used for the label on the cancel button in the dialog, or %NULL to use the default text.
Whether a file chooser not in %GTK_FILE_CHOOSER_ACTION_OPEN mode will offer the user to create new folders.
Whether a file chooser in %GTK_FILE_CHOOSER_ACTION_SAVE mode will present an overwrite confirmation dialog if the user selects a file name that already exists.
Whether the window should be modal with respect to its transient parent.
The title of the dialog window
The transient parent of the dialog, or %NULL for none.
Whether the window is currenlty visible.
The text used for the label on the accept button in the dialog, or %NULL to use the default text.