don't make read-only text controls editable when enabled

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

diff --git a/docs/latex/wx/tstream.tex b/docs/latex/wx/tstream.tex
index 5c4bc5c44928e35ce86a3a8f4fb74c16f7245c1a..7b456062a2fe19749846e64baa30959dd4e14aa6 100644 (file)
--- a/docs/latex/wx/tstream.tex
+++ b/docs/latex/wx/tstream.tex
@@ -1,4 +1,4 @@
-\section{Streams in wxWindows overview}\label{wxstreamoverview}
+\section{wxStreams overview}\label{wxstreamoverview}

 
 Classes: \helpref{wxStreamBase}{wxstreambase},
  \helpref{wxStreamBuffer}{wxstreambuffer}, \helpref{wxInputStream}{wxinputstream},
 
 Classes: \helpref{wxStreamBase}{wxstreambase},
  \helpref{wxStreamBuffer}{wxstreambuffer}, \helpref{wxInputStream}{wxinputstream},


@@ -8,15 +8,18 @@ Classes: \helpref{wxStreamBase}{wxstreambase},
 
 \wxheading{Purpose of wxStream}
 
 
 \wxheading{Purpose of wxStream}
 

-We went into troubles with c++ std streams on some platform:
-they react quite well in most cases, but in multi-threaded case, for example,
-they have a LOT of problems.
+Standard C++ streams can cause problems on several platforms:
+they work quite well in most cases, but in the multi-threaded case, for example,
+they have many problems. Some Borland compilers refuse to work at all
+with them and using iostreams on Linux makes writing programs that are
+binary compatible across different Linux distributions, impossible.

 
 

-Then, wxStreams have been built in wxWindows because an application should compile
-and run on all supported platforms and we don't want users depend on release
-X.XX of libg++ or some other compiler to run the program.
+Therefore, wxStreams have been added to wxWidgets so that applications can
+reliably compile and run on all supported platforms without dependence on a
+particular release of libg++.

 
 wxStreams is divided in two main parts:
 
 wxStreams is divided in two main parts:

+

 \begin{enumerate}\itemsep=0pt
 \item the core: wxStreamBase, wxStreamBuffer, wxInputStream, wxOutputStream,
 wxFilterIn/OutputStream
 \begin{enumerate}\itemsep=0pt
 \item the core: wxStreamBase, wxStreamBuffer, wxInputStream, wxOutputStream,
 wxFilterIn/OutputStream


@@ -24,20 +27,20 @@ wxFilterIn/OutputStream
 \end{enumerate}
 
 wxStreamBase is the base definition of a stream. It defines, for example,
 \end{enumerate}
 
 wxStreamBase is the base definition of a stream. It defines, for example,

-the API of OnSysRead, OnSysWrite, OnSysSeek and OnSysTell. These functions are
+the API of OnSysRead, OnSysWrite, OnSysSeek and OnSysTell. These functions 

 are really implemented by the "IO" classes.
 wxInputStream and wxOutputStream inherit from it.
 
 are really implemented by the "IO" classes.
 wxInputStream and wxOutputStream inherit from it.
 

-wxStreamBuffer is a cache manager for wxStreamBase (it manages a stream buffer
-linked to a stream). One stream can have multiple stream buffers  but one stream
+wxStreamBuffer is a cache manager for wxStreamBase: it manages a stream buffer
+linked to a stream. One stream can have multiple stream buffers  but one stream

 have always one autoinitialized stream buffer.
 
 wxInputStream is the base class for read-only streams. It implements Read,
 SeekI (I for Input), and all read or IO generic related functions.
 wxOutputStream does the same thing but it is for write-only streams.
 
 have always one autoinitialized stream buffer.
 
 wxInputStream is the base class for read-only streams. It implements Read,
 SeekI (I for Input), and all read or IO generic related functions.
 wxOutputStream does the same thing but it is for write-only streams.
 

-wxFilterIn/OutputStream is base class definition for stream filtering.
-I mean by stream filtering, a stream which does no syscall but filter datas
+wxFilterIn/OutputStream is the base class definition for stream filtering.
+Stream filtering means a stream which does no syscall but filters data

 which are passed to it and then pass them to another stream.
 For example, wxZLibInputStream is an inline stream decompressor.
 
 which are passed to it and then pass them to another stream.
 For example, wxZLibInputStream is an inline stream decompressor.
 


@@ -48,42 +51,37 @@ wxStreamBuffer. This could also be a simple link to the a true syscall
 
 \wxheading{Generic usage: an example}
 
 
 \wxheading{Generic usage: an example}
 

-About its usage, it's simple. We can take the example of wxFileInputStream and here is a sample
+Usage is simple. We can take the example of wxFileInputStream and here is some sample

 code:
 
 \begin{verbatim}
  ...
  // The constructor initializes the stream buffer and open the file descriptor
  // associated to the name of the file.
 code:
 
 \begin{verbatim}
  ...
  // The constructor initializes the stream buffer and open the file descriptor
  // associated to the name of the file.

- wxFileInputStream in\_stream("the\_file\_to\_be\_read");
+ wxFileInputStream in_stream("the_file_to_be_read");

 
 

- // Ok, read some bytes ... nb\_datas is expressed in bytes.
- in\_stream.Read(data, nb\_datas);
- if (in\_stream.LastError() != wxStream\_NOERROR) {
+ // Ok, read some bytes ... nb_datas is expressed in bytes.
+ in_stream.Read(data, nb_datas);
+ if (in_stream.LastError() != wxSTREAM_NOERROR) {

    // Oh oh, something bad happens.
    // For a complete list, look into the documentation at wxStreamBase.
  }
 
  // You can also inline all like this.
    // Oh oh, something bad happens.
    // For a complete list, look into the documentation at wxStreamBase.
  }
 
  // You can also inline all like this.

- if (in\_stream.Read(data, nb\_datas).LastError() != wxStream\_NOERROR) {
+ if (in_stream.Read(data, nb_datas).LastError() != wxSTREAM_NOERROR) {

    // Do something.
  }
 
  // You can also get the last number of bytes REALLY put into the buffer.
    // Do something.
  }
 
  // You can also get the last number of bytes REALLY put into the buffer.

- size\_t really\_read = in\_stream.LastRead();
+ size_t really_read = in_stream.LastRead();

 
  // Ok, moves to the beginning of the stream. SeekI returns the last position 
  // in the stream counted from the beginning.
 
  // Ok, moves to the beginning of the stream. SeekI returns the last position 
  // in the stream counted from the beginning.

- off\_t old_position = in\_stream.SeekI(0, wxFromBeginning);
+ off_t old_position = in_stream.SeekI(0, wxFromBeginning);

  
  // What is my current position ?
  
  // What is my current position ?

- off\_t position = in\_stream.TellI();
+ off_t position = in_stream.TellI();

 
 

- // wxFileInputStream will close the file descriptor on the destruction.
+ // wxFileInputStream will close the file descriptor on destruction.

 \end{verbatim}
 
 \end{verbatim}
 

-\wxheading{Compatibility with c++ stream}
-
-As I said previously, we could add a filter stream so it takes an istream
-argument and builds a wxInputStream from it: I don't think it should 
-be difficult to implement it and it may be available in the fix of wxWindows 2.0.