include/wx/msw/evtloop.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/evtloop.h
   3 // Purpose:     wxEventLoop class for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2004-07-31
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003-2004 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_MSW_EVTLOOP_H_
  13 #define _WX_MSW_EVTLOOP_H_
  14
  15 // ----------------------------------------------------------------------------
  16 // wxEventLoop
  17 // ----------------------------------------------------------------------------
  18
  19 class WXDLLEXPORT wxEventLoop : public wxEventLoopBase
  20 {
  21 public:
  22     wxEventLoop();
  23
  24     // implement base class pure virtuals
  25     virtual int Run();
  26     virtual void Exit(int rc = 0);
  27     virtual bool Pending() const;
  28     virtual bool Dispatch();
  29     virtual bool IsRunning() const;
  30
  31     // MSW-specific methods
  32     // --------------------
  33
  34     // preprocess a message, return true if processed (i.e. no further
  35     // dispatching required)
  36     virtual bool PreProcessMessage(WXMSG *msg);
  37
  38     // process a single message
  39     virtual void ProcessMessage(WXMSG *msg);
  40
  41     // set the critical window: this is the window such that all the events
  42     // except those to this window (and its children) stop to be processed
  43     // (typical examples: assert or crash report dialog)
  44     //
  45     // calling this function with NULL argument restores the normal event
  46     // handling
  47     static void SetCriticalWindow(wxWindow *win) { ms_winCritical = win; }
  48
  49     // return true if there is no critical window or if this window is [a child
  50     // of] the critical one
  51     static bool AllowProcessing(wxWindow *win)
  52     {
  53         return !ms_winCritical || IsChildOfCriticalWindow(win);
  54     }
  55
  56 protected:
  57     // check if the given window is a child of ms_winCritical (which must be
  58     // non NULL)
  59     static bool IsChildOfCriticalWindow(wxWindow *win);
  60
  61
  62     // critical window or NULL
  63     static wxWindow *ms_winCritical;
  64
  65     // the loop exit code
  66     int m_exitcode;
  67
  68     // should we exit the loop?
  69     bool m_shouldExit;
  70 };
  71
  72 #endif // _WX_MSW_EVTLOOP_H_
  73