X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3972fb4919148d1ed67f897ea5beb67eedd662f6..da4b7ffc783b90227e05df7484121c5435ae8985:/docs/latex/wx/process.tex diff --git a/docs/latex/wx/process.tex b/docs/latex/wx/process.tex index ee84b0e404..97d8a40446 100644 --- a/docs/latex/wx/process.tex +++ b/docs/latex/wx/process.tex @@ -1,13 +1,27 @@ \section{\class{wxProcess}}\label{wxprocess} -This class contains a method which is invoked when a process finishes. -It can raise a \helpref{wxProcessEvent}{wxprocessevent} if wxProcess::OnTerminate -isn't overriden. +The objects of this class are used in conjunction with +\helpref{wxExecute}{wxexecute} function. When a wxProcess object is passed to +wxExecute(), its \helpref{OnTerminate()}{wxprocessonterminate} virtual method +is called when the process terminates. This allows the program to be +(asynchronously) notified about the process termination and also retrieve its +exit status which is unavailable from wxExecute() in the case of +asynchronous execution. + +Please note that if the process termination notification is processed by the +parent, it is responsible for deleting the wxProcess object which sent it. +However, if it is not processed, the object will delete itself and so the +library users should only delete those objects whose notifications have been +processed (and call \helpref{Detach()}{wxprocessdetach} for others). \wxheading{Derived from} \helpref{wxEvtHandler}{wxevthandler} +\wxheading{Include files} + + + \latexignore{\rtfignore{\wxheading{Members}}} \membersection{wxProcess::wxProcess}\label{wxprocessconstr} @@ -18,6 +32,10 @@ Constructs a process object. {\it id} is only used in the case you want to use wxWindows events. It identifies this object, or another window that will receive the event. +If the {\it parent} parameter is different from NULL, it will receive +a wxEVT\_END\_PROCESS notification event (you should insert EVT\_END\_PROCESS +macro in the event table of the parent to handle it) with the given {\it id}. + \wxheading{Parameters} \docparam{parent}{The event handler parent.} @@ -30,12 +48,28 @@ receive the event. Destroys the wxProcess object. +\membersection{wxProcess::Detach}\label{wxprocessdetach} + +\func{void}{Detach}{\void} + +Normally, a wxProcess object is deleted by its parent when it receives the +notification about the process termination. However, it might happen that the +parent object is destroyed before the external process is terminated (e.g. a +window from which this external process was launched is closed by the user) +and in this case it {\bf should not delete} the wxProcess object, but +{\bf should call Detach()} instead. After the wxProcess object is detached +from its parent, no notification events will be sent to the parent and the +object will delete itself upon reception of the process termination +notification. + \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate} -\constfunc{void}{OnTerminate}{\param{int}{ pid}} +\constfunc{void}{OnTerminate}{\param{int}{ pid}, \param{int}{ status}} It is called when the process with the pid {\it pid} finishes. It raises a wxWindows event when it isn't overriden. -\docparam{pid}{The pid of the process which ends.} +\docparam{pid}{The pid of the process which has just terminated.} + +\docparam{status}{The exit code of the process.}