Emitted when the user asks for it.
This is a [keybinding signal](class.SignalAction.html).
This is used to make the file chooser show a "Location" prompt which the user can use to manually type the name of the file he wishes to select.
The default bindings for this signal are <kbd>Control</kbd>-<kbd>L</kbd> with a
path string of "" (the
empty string). It is also bound to <kbd>/</kbd> with a
path string of "`/`" (a slash): this lets you type `/` and
immediately type a path name. On Unix systems, this is bound to <kbd>~</kbd> (tilde) with a
path string of "~" itself
for access to home directories.
a string that gets put in the text entry for the file name