src/unix/apptraits.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/apptraits.cpp
   3 // Purpose:     implementation of wxGUIAppTraits for Unix systems
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-03-22
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27 #endif // WX_PRECOMP
  28
  29 #include "wx/apptrait.h"
  30 #include "wx/unix/execute.h"
  31
  32 // ============================================================================
  33 // implementation
  34 // ============================================================================
  35
  36 int wxGUIAppTraits::WaitForChild(wxExecuteData& execData)
  37 {
  38     const int flags = execData.flags;
  39     if ( !(flags & wxEXEC_SYNC) || (flags & wxEXEC_NOEVENTS) )
  40     {
  41         // async or blocking sync cases are already handled by the base class
  42         // just fine, no need to duplicate its code here
  43         return wxAppTraits::WaitForChild(execData);
  44     }
  45
  46     // here we're dealing with the case of synchronous execution when we want
  47     // to process the GUI events while waiting for the child termination
  48
  49     wxEndProcessData endProcData;
  50     endProcData.pid = execData.pid;
  51     endProcData.tag = AddProcessCallback
  52                       (
  53                          &endProcData,
  54                          execData.GetEndProcReadFD()
  55                       );
  56     endProcData.async = false;
  57
  58
  59     // prepare to wait for the child termination: show to the user that we're
  60     // busy and refuse all input unless explicitly told otherwise
  61     wxBusyCursor bc;
  62     wxWindowDisabler wd(!(flags & wxEXEC_NODISABLE));
  63
  64     // endProcData.pid will be set to 0 from wxHandleProcessTermination() when
  65     // the process terminates
  66     while ( endProcData.pid != 0 )
  67     {
  68         // don't consume 100% of the CPU while we're sitting in this
  69         // loop
  70         if ( !CheckForRedirectedIO(execData) )
  71             wxMilliSleep(1);
  72
  73         // give the toolkit a chance to call wxHandleProcessTermination() here
  74         // and also repaint the GUI and handle other accumulated events
  75         wxYield();
  76     }
  77
  78     return endProcData.exitcode;
  79 }
  80
  81