include/wx/msw/apptbase.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/apptbase.h
   3 // Purpose:     declaration of wxAppTraits for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     22.06.2003
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_MSW_APPTBASE_H_
  13 #define _WX_MSW_APPTBASE_H_
  14
  15 // ----------------------------------------------------------------------------
  16 // wxAppTraits: the MSW version adds extra hooks needed by MSW-only code
  17 // ----------------------------------------------------------------------------
  18
  19 class WXDLLIMPEXP_BASE wxAppTraits : public wxAppTraitsBase
  20 {
  21 public:
  22     // wxExecute() support methods
  23     // ---------------------------
  24
  25     // called before starting to wait for the child termination, may return
  26     // some opaque data which will be passed later to AfterChildWaitLoop()
  27     virtual void *BeforeChildWaitLoop() = 0;
  28
  29     // process pending Windows messages, even in console app
  30     virtual void AlwaysYield() = 0;
  31
  32     // called after starting to wait for the child termination, the parameter
  33     // is the return value of BeforeChildWaitLoop()
  34     virtual void AfterChildWaitLoop(void *data) = 0;
  35
  36
  37     // wxThread helpers
  38     // ----------------
  39
  40     // process a message while waiting for a(nother) thread, should return
  41     // false if and only if we have to exit the application
  42     virtual bool DoMessageFromThreadWait() = 0;
  43
  44     // wait for the handle to be signaled, return WAIT_OBJECT_0 if it is or, in
  45     // the GUI code, WAIT_OBJECT_0 + 1 if a Windows message arrived
  46     virtual WXDWORD WaitForThread(WXHANDLE hThread) = 0;
  47
  48
  49 #ifndef __WXWINCE__
  50     // console helpers
  51     // ---------------
  52
  53     // this method can be overridden by a derived class to always return true
  54     // or false to force [not] using the console for output to stderr
  55     //
  56     // by default console applications always return true from here while the
  57     // GUI ones only return true if they're being run from console and there is
  58     // no other activity happening in this console
  59     virtual bool CanUseStderr() = 0;
  60
  61     // write text to the console, return true if ok or false on error
  62     virtual bool WriteToStderr(const wxString& text) = 0;
  63 #endif // !__WXWINCE__
  64
  65 protected:
  66     // implementation of WaitForThread() for the console applications which is
  67     // also used by the GUI code if it doesn't [yet|already} dispatch events
  68     WXDWORD DoSimpleWaitForThread(WXHANDLE hThread);
  69 };
  70
  71 #endif // _WX_MSW_APPTBASE_H_
  72