Sets the type of operation that the chooser is performing; the
user interface is adapted to suit the selected action. For example,
an option to create a new folder might be shown if the action is
%GTK_FILE_CHOOSER_ACTION_SAVE but not if the action is
%GTK_FILE_CHOOSER_ACTION_OPEN.
Sets the type of operation that the chooser is performing; the user interface is adapted to suit the selected action. For example, an option to create a new folder might be shown if the action is %GTK_FILE_CHOOSER_ACTION_SAVE but not if the action is %GTK_FILE_CHOOSER_ACTION_OPEN.