interface/busyinfo.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        busyinfo.h
   3 // Purpose:     interface of wxBusyInfo
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxBusyInfo
  11     @wxheader{busyinfo.h}
  12
  13     This class makes it easy to tell your user that the program is temporarily busy.
  14     Just create a wxBusyInfo object on the stack, and within the current scope,
  15     a message window will be shown.
  16
  17     For example:
  18
  19     @code
  20         wxBusyInfo wait("Please wait, working...");
  21
  22         for (int i = 0; i < 100000; i++)
  23         {
  24             DoACalculation();
  25         }
  26     @endcode
  27
  28     It works by creating a window in the constructor, and deleting it
  29     in the destructor.
  30
  31     You may also want to call wxTheApp-Yield() to refresh the window
  32     periodically (in case it had been obscured by other windows, for
  33     example) like this:
  34
  35     @code
  36         wxWindowDisabler disableAll;
  37
  38         wxBusyInfo wait("Please wait, working...");
  39
  40         for (int i = 0; i < 100000; i++)
  41         {
  42             DoACalculation();
  43
  44             if ( !(i % 1000) )
  45                 wxTheApp-Yield();
  46         }
  47     @endcode
  48
  49     but take care to not cause undesirable reentrancies when doing it (see
  50     wxApp::Yield for more details). The simplest way to do it is to use
  51     wxWindowDisabler class as illustrated in the above example.
  52
  53     @library{wxcore}
  54     @category{cmndlg}
  55 */
  56 class wxBusyInfo
  57 {
  58 public:
  59     /**
  60         Constructs a busy info window as child of @a parent and displays @e msg in it.
  61
  62         @note If @a parent is not @NULL you must ensure that it is not
  63               closed while the busy info is shown.
  64     */
  65     wxBusyInfo(const wxString& msg, wxWindow* parent = NULL);
  66
  67     /**
  68         Hides and closes the window containing the information text.
  69     */
  70     ~wxBusyInfo();
  71 };
  72