gtk:dialog, gtk:window, gtk:bin, gtk:container, gtk:widget, gtk:buildable, gtk:file-chooser, gobject:object, common-lisp:standard-object, common-lisp:t

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The gtk:file-chooser-dialog widget is a dialog box suitable for use with "File/Open" or "File/Save as" commands. This widget works by putting a gtk:file-chooser-widget widget inside a gtk:dialog widget. It exposes the gtk:file-chooser interface, so you can use all of the gtk:file-chooser functions on the file chooser dialog as well as those for the gtk:dialog widget.

GtkFileChooserDialog Note that the gtk:file-chooser-dialog widget does not have any methods of its own. Instead, you should use the functions that work on a gtk:file-chooser interface.

Example: Typical usage
In the simplest of cases, you can the following code to use the gtk:file-chooser-dialog widget to select a file for opening:

(defun create-file-chooser-dialog-open (window)
  (let ((dialog (gtk:file-chooser-dialog-new "Open File"
                                             window
                                             :open
                                             "gtk-cancel" :cancel
                                             "gtk-open" :accept)))
    (if (eq :accept (gtk:dialog-run dialog))
      (let ((filename (gtk:file-chooser-filename dialog)))
        ...
      ))
    (gtk:widget-destroy dialog)))  

To use a dialog for saving, you can use this:

(defun create-file-chooser-dialog-save (window filename)
  (let ((dialog (gtk:file-chooser-dialog-new "Save File"
                                             window
                                             :save
                                             "gtk-cancel" :cancel
                                             "gtk-save" :accept)))
    (setf (gtk:file-chooser-do-overwrite-confirmation dialog) t)
    (if filename
        (setf (gtk:file-chooser-filename dialog) filename)
        (setf (gtk:file-chooser-current-name dialog) "Untitled document"))
    (if (eq :accept (gtk:dialog-run dialog))
      (let ((filename (gtk:file-chooser-filename dialog)))
        ...
      ))
    (gtk:widget-destroy dialog)))  

Setting up a file chooser dialog

There are various cases in which you may need to use a gtk:file-chooser-dialog widget:

• To select a file for opening, as for a File/Open command. Use :open.
• To save a file for the first time, as for a File/Save command. Use :save, and suggest a name such as "Untitled" with the gtk:file-chooser-current-name function.
• To save a file under a different name, as for a File/Save As command. Use :save, and set the existing filename with the gtk:file-chooser-filename function.
• To choose a folder instead of a file. Use :select-folder.

Note

Old versions of the file chooser's documentation suggested using the gtk:file-chooser-current-folder function in various situations, with the intention of letting the application suggest a reasonable default folder. This is no longer considered to be a good policy, as now the file chooser is able to make good suggestions on its own. In general, you should only cause the file chooser to show a specific folder when it is appropriate to use the gtk:file-chooser-filename function, i.e. when you are doing a File/Save As command and you already have a file saved somewhere.

Response Codes

The gtk:file-chooser-dialog widget inherits from the gtk:dialog widget, so buttons that go in its action area have response codes such as :accept and :cancel. For example, you could call the gtk:file-chooser-dialog-new function as follows:

(let ((dialog (gtk:file-chooser-dialog-new "Open File"
                                           parent-window
                                           :open
                                           "gtk-cancel" :cancel
                                           "gtk-open" :accept)))
  ... )    

This will create buttons for "Cancel" and "Open" that use stock response identifiers from the gtk:response-type enumeration. For most dialog boxes you can use your own custom response codes rather than the ones in the gtk:response-type enumeration, but the gtk:file-chooser-dialog widget assumes that its "accept"-type action, e.g. an "Open" or "Save" button, will have one of the following response codes:

     :accept     :ok     :yes     :apply    

This is because the gtk:file-chooser-dialog widget must intercept responses and switch to folders if appropriate, rather than letting the dialog terminate - the implementation uses these known response codes to know which responses can be blocked if appropriate.

Note

To summarize, make sure you use a stock response code when you use the gtk:file-chooser-dialog widget to ensure proper operation.