added SetStatusText method (avoiding dc.Clear)

[wxWidgets.git] / docs / latex / wx / process.tex

diff --git a/docs/latex/wx/process.tex b/docs/latex/wx/process.tex
index 4aa9a8df2358c96550d6fbaaf67e547b94bdcab9..2994063100756b3b99866e98455656545475aee3 100644 (file)
--- a/docs/latex/wx/process.tex
+++ b/docs/latex/wx/process.tex
@@ -1,6 +1,6 @@
 \section{\class{wxProcess}}\label{wxprocess}
 
 \section{\class{wxProcess}}\label{wxprocess}
 

-The objects of this class are used in conjunction with 
+The objects of this class are used in conjunction with the 

 \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
 \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


@@ -14,6 +14,15 @@ 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).
 
 library users should only delete those objects whose notifications have been
 processed (and call \helpref{Detach()}{wxprocessdetach} for others).
 

+wxProcess also supports IO redirection of the child process. For this, you have
+to call its \helpref{Redirect}{wxprocessredirect} method before passing it to 
+\helpref{wxExecute}{wxexecute}. If the child process was launched successfully, 
+\helpref{GetInputStream}{wxprocessgetinputstream}, 
+\helpref{GetOutputStream}{wxprocessgetoutputstream} and 
+\helpref{GetErrorStream}{wxprocessgeterrorstream} can then be used to retrieve
+the streams corresponding to the child process stdandard output, input and
+error output respectively.
+

 \wxheading{Derived from}
 
 \helpref{wxEvtHandler}{wxevthandler}
 \wxheading{Derived from}
 
 \helpref{wxEvtHandler}{wxevthandler}


@@ -22,6 +31,11 @@ processed (and call \helpref{Detach()}{wxprocessdetach} for others).
 
 <wx/process.h>
 
 
 <wx/process.h>
 

+\wxheading{See also}
+
+\helpref{wxExecute}{wxexecute}\\
+\helpref{exec sample}{sampleexec}
+

 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxProcess::wxProcess}\label{wxprocessconstr}
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxProcess::wxProcess}\label{wxprocessconstr}


@@ -48,6 +62,15 @@ macro in the event table of the parent to handle it) with the given {\it id}.
 
 Destroys the wxProcess object.
 
 
 Destroys the wxProcess object.
 

+\membersection{wxProcess::CloseOutput}\label{wxprocesscloseoutput}
+
+\func{void}{CloseOutput}{\void}
+
+Closes the output stream (the one connected to the stdin of the child
+process). This function can be used to indicate to the child process that
+there is no more data to be read - usually, a filter program will only
+terminate when the input stream is closed.
+

 \membersection{wxProcess::Detach}\label{wxprocessdetach}
 
 \func{void}{Detach}{\void}
 \membersection{wxProcess::Detach}\label{wxprocessdetach}
 
 \func{void}{Detach}{\void}


@@ -62,28 +85,97 @@ 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.
 
 object will delete itself upon reception of the process termination
 notification.
 

+\membersection{wxProcess::GetErrorStream}\label{wxprocessgeterrorstream}
+
+\constfunc{wxInputStream* }{GetErrorStream}{\void}
+
+Returns an input stream which corresponds to the standard error output (stderr)
+of the child process.
+

 \membersection{wxProcess::GetInputStream}\label{wxprocessgetinputstream}
 
 \constfunc{wxInputStream* }{GetInputStream}{\void}
 
 \membersection{wxProcess::GetInputStream}\label{wxprocessgetinputstream}
 
 \constfunc{wxInputStream* }{GetInputStream}{\void}
 

-It returns a output stream corresponding to the input stream of the subprocess. 
-If it is NULL, you have not turned on the redirection.
+It returns an input stream corresponding to the standard output stream of the
+subprocess. If it is NULL, you have not turned on the redirection.

 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 
 \membersection{wxProcess::GetOutputStream}\label{wxprocessgetoutputstream}
 
 \constfunc{wxOutputStream* }{GetOutputStream}{\void}
 
 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 
 \membersection{wxProcess::GetOutputStream}\label{wxprocessgetoutputstream}
 
 \constfunc{wxOutputStream* }{GetOutputStream}{\void}
 

-It returns an output stream correspoding to the output stream of the subprocess.
+It returns an output stream correspoding to the input stream of the subprocess.

 If it is NULL, you have not turned on the redirection.
 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 
 If it is NULL, you have not turned on the redirection.
 See \helpref{wxProcess::Redirect}{wxprocessredirect}.
 

+\membersection{wxProcess::Kill}\label{wxprocesskill}
+
+\func{static wxKillError}{Kill}{\param{int}{ pid}, \param{wxSignal}{ signal = wxSIGNONE}}
+
+Send the specified signal to the given process. Possible signal values are:
+
+\begin{verbatim}
+enum wxSignal
+{
+    wxSIGNONE = 0,  // verify if the process exists under Unix
+    wxSIGHUP,
+    wxSIGINT,
+    wxSIGQUIT,
+    wxSIGILL,
+    wxSIGTRAP,
+    wxSIGABRT,
+    wxSIGEMT,
+    wxSIGFPE,
+    wxSIGKILL,      // forcefully kill, dangerous!
+    wxSIGBUS,
+    wxSIGSEGV,
+    wxSIGSYS,
+    wxSIGPIPE,
+    wxSIGALRM,
+    wxSIGTERM       // terminate the process gently
+};
+\end{verbatim}
+
+{\tt wxSIGNONE}, {\tt wxSIGKILL} and {\tt wxSIGTERM} have the same meaning
+under both Unix and Windows but all the other signals are equivalent to 
+{\tt wxSIGTERM} under Windows.
+
+Returns the element of {\tt wxKillError} enum:
+
+\begin{verbatim}
+enum wxKillError
+{
+    wxKILL_OK,              // no error
+    wxKILL_BAD_SIGNAL,      // no such signal
+    wxKILL_ACCESS_DENIED,   // permission denied
+    wxKILL_NO_PROCESS,      // no such process
+    wxKILL_ERROR            // another, unspecified error
+};
+\end{verbatim}
+
+\wxheading{See also}
+
+\helpref{wxProcess::Exists}{wxprocessexists},\rtfsp
+\helpref{wxKill}{wxkill},\rtfsp
+\helpref{Exec sample}{sampleexec}
+
+\membersection{wxProcess::Kill}\label{wxprocessexists}
+
+\func{static bool}{Exists}{\param{int}{ pid}}
+
+Returns {\tt TRUE} if the given process exists in the system.
+
+\wxheading{See also}
+
+\helpref{wxProcess::Kill}{wxprocesskill},\rtfsp
+\helpref{Exec sample}{sampleexec}
+

 \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate}
 
 \constfunc{void}{OnTerminate}{\param{int}{ pid}, \param{int}{ status}}
 
 It is called when the process with the pid {\it pid} finishes.
 \membersection{wxProcess::OnTerminate}\label{wxprocessonterminate}
 
 \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.
+It raises a wxWindows event when it isn't overridden.

 
 \docparam{pid}{The pid of the process which has just terminated.}
 
 
 \docparam{pid}{The pid of the process which has just terminated.}
 


@@ -93,7 +185,7 @@ It raises a wxWindows event when it isn't overriden.
 
 \func{void}{Redirect}{\void}
 
 
 \func{void}{Redirect}{\void}
 

-It turns on the redirection, wxExecute will try to open a couple of pipes
+Turns on redirection. wxExecute will try to open a couple of pipes

 to catch the subprocess stdio. The caught input stream is returned by
 GetOutputStream() as a non-seekable stream. The caught output stream is returned
 by GetInputStream() as a non-seekable stream.
 to catch the subprocess stdio. The caught input stream is returned by
 GetOutputStream() as a non-seekable stream. The caught output stream is returned
 by GetInputStream() as a non-seekable stream.