docs/latex/wx/process.tex

   1 \section{\class{wxProcess}}\label{wxprocess}
   2
   3 The objects of this class are used in conjunction with
   4 \helpref{wxExecute}{wxexecute} function. When a wxProcess object is passed to
   5 wxExecute(), its \helpref{OnTerminate()}{wxprocessonterminate} virtual method
   6 is called when the process terminates. This allows the program to be
   7 (asynchronously) notified about the process termination and also retrieve its
   8 exit status which is unavailable from wxExecute() in the case of
   9 asynchronous execution.
  10
  11 Please note that if the process termination notification is processed by the
  12 parent, it is responsible for deleting the wxProcess object which sent it.
  13 However, if it is not processed, the object will delete itself and so the
  14 library users should only delete those objects whose notifications have been
  15 processed (and call \helpref{Detach()}{wxprocessdetach} for others).
  16
  17 \wxheading{Derived from}
  18
  19 \helpref{wxEvtHandler}{wxevthandler}
  20
  21 \wxheading{Include files}
  22
  23 <wx/process.h>
  24
  25 \latexignore{\rtfignore{\wxheading{Members}}}
  26
  27 \membersection{wxProcess::wxProcess}\label{wxprocessconstr}
  28
  29 \func{}{wxProcess}{\param{wxEvtHandler *}{ parent = NULL}, \param{int}{ id = -1}}
  30
  31 Constructs a process object. {\it id} is only used in the case you want to
  32 use wxWindows events. It identifies this object, or another window that will
  33 receive the event.
  34
  35 If the {\it parent} parameter is different from NULL, it will receive
  36 a wxEVT\_END\_PROCESS notification event (you should insert EVT\_END\_PROCESS
  37 macro in the event table of the parent to handle it) with the given {\it id}.
  38
  39 \wxheading{Parameters}
  40
  41 \docparam{parent}{The event handler parent.}
  42
  43 \docparam{id}{id of an event.}
  44
  45 \membersection{wxProcess::\destruct{wxProcess}}
  46
  47 \func{}{\destruct{wxProcess}}{\void}
  48
  49 Destroys the wxProcess object.
  50
  51 \membersection{wxProcess::Detach}\label{wxprocessdetach}
  52
  53 \func{void}{Detach}{\void}
  54
  55 Normally, a wxProcess object is deleted by its parent when it receives the
  56 notification about the process termination. However, it might happen that the
  57 parent object is destroyed before the external process is terminated (e.g. a
  58 window from which this external process was launched is closed by the user)
  59 and in this case it {\bf should not delete} the wxProcess object, but
  60 {\bf should call Detach()} instead. After the wxProcess object is detached
  61 from its parent, no notification events will be sent to the parent and the
  62 object will delete itself upon reception of the process termination
  63 notification.
  64
  65 \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate}
  66
  67 \constfunc{void}{OnTerminate}{\param{int}{ pid}, \param{int}{ status}}
  68
  69 It is called when the process with the pid {\it pid} finishes.
  70 It raises a wxWindows event when it isn't overriden.
  71
  72 \docparam{pid}{The pid of the process which has just terminated.}
  73
  74 \docparam{status}{The exit code of the process.}
  75