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 #include "wx/apptrait.h"
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/utils.h"
  30 #endif // WX_PRECOMP
  31
  32 #include "wx/unix/execute.h"
  33
  34 // ============================================================================
  35 // implementation
  36 // ============================================================================
  37
  38 int wxGUIAppTraits::WaitForChild(wxExecuteData& execData)
  39 {
  40     const int flags = execData.flags;
  41     if ( !(flags & wxEXEC_SYNC) || (flags & wxEXEC_NOEVENTS) )
  42     {
  43         // async or blocking sync cases are already handled by the base class
  44         // just fine, no need to duplicate its code here
  45         return wxAppTraits::WaitForChild(execData);
  46     }
  47
  48     // here we're dealing with the case of synchronous execution when we want
  49     // to process the GUI events while waiting for the child termination
  50
  51     wxEndProcessData endProcData;
  52     endProcData.pid = execData.pid;
  53     endProcData.tag = AddProcessCallback
  54                       (
  55                          &endProcData,
  56                          execData.GetEndProcReadFD()
  57                       );
  58     endProcData.async = false;
  59
  60
  61     // prepare to wait for the child termination: show to the user that we're
  62     // busy and refuse all input unless explicitly told otherwise
  63     wxBusyCursor bc;
  64     wxWindowDisabler wd(!(flags & wxEXEC_NODISABLE));
  65
  66     // endProcData.pid will be set to 0 from wxHandleProcessTermination() when
  67     // the process terminates
  68     while ( endProcData.pid != 0 )
  69     {
  70         // don't consume 100% of the CPU while we're sitting in this
  71         // loop
  72         if ( !CheckForRedirectedIO(execData) )
  73             wxMilliSleep(1);
  74
  75         // give the toolkit a chance to call wxHandleProcessTermination() here
  76         // and also repaint the GUI and handle other accumulated events
  77         wxYield();
  78     }
  79
  80     return endProcData.exitcode;
  81 }
  82
  83