docs/latex/wx/strmbase.tex

   1 % -----------------------------------------------------------------------------
   2 % wxStreamBase
   3 % -----------------------------------------------------------------------------
   4 \section{\class{wxStreamBase}}\label{wxstreambase}
   5
   6 This class is the base class of most stream related classes in wxWindows. It must
   7 not be used directly.
   8
   9 \wxheading{Derived from}
  10
  11 None
  12
  13 \wxheading{Include files}
  14
  15 <wx/stream.h>
  16
  17 \wxheading{See also}
  18
  19 \helpref{wxStreamBuffer}{wxstreambuffer}
  20
  21 % -----------------------------------------------------------------------------
  22 % Members
  23 % -----------------------------------------------------------------------------
  24 \latexignore{\rtfignore{\wxheading{Members}}}
  25
  26 % -----------
  27 % ctor & dtor
  28 % -----------
  29
  30 \membersection{wxStreamBase::wxStreamBase}
  31
  32 \func{}{wxStreamBase}{\void}
  33
  34 Creates a dummy stream object. It doesn't do anything.
  35
  36 \membersection{wxStreamBase::\destruct{wxStreamBase}}
  37
  38 \func{}{\destruct{wxStreamBase}}{\void}
  39
  40 Destructor.
  41
  42 \membersection{wxStreamBase::LastError}\label{wxstreambaselasterror}
  43
  44 \constfunc{wxStreamError}{LastError}{\void}
  45
  46 This function returns the last error.
  47 \twocolwidtha{5cm}
  48 \begin{twocollist}\itemsep=0pt
  49 \twocolitem{{\bf wxSTREAM\_NO\_ERROR}}{No error occured.}
  50 \twocolitem{{\bf wxSTREAM\_EOF}}{An End-Of-File occured.}
  51 \twocolitem{{\bf wxSTREAM\_WRITE\_ERROR}}{A generic error occured on the last write call.}
  52 \twocolitem{{\bf wxSTREAM\_READ\_ERROR}}{A generic error occured on the last read call.}
  53 \end{twocollist}
  54
  55 \membersection{wxStreamBase::OnSysRead}\label{wxstreambaseonsysread}
  56
  57 \func{size\_t}{OnSysRead}{\param{void*}{ buffer}, \param{size\_t}{ bufsize}}
  58
  59 Internal function. It is called when the stream wants to read data of the
  60 specified size. It should return the size that was actually read.
  61
  62 \membersection{wxStreamBase::OnSysSeek}
  63
  64 \func{off\_t}{OnSysSeek}{\param{off\_t}{ pos}, \param{wxSeekMode}{ mode}}
  65
  66 Internal function. It is called when the stream needs to change the
  67 current position.
  68
  69 \membersection{wxStreamBase::OnSysTell}
  70
  71 \constfunc{off\_t}{OnSysTell}{\void}
  72
  73 Internal function. Is is called when the stream needs to know the
  74 real position.
  75
  76 \membersection{wxStreamBase::OnSysWrite}
  77
  78 \func{size\_t}{OnSysWrite}{\param{void *}{buffer}, \param{size\_t}{ bufsize}}
  79
  80 See \helpref{OnSysRead}{wxstreambaseonsysread}.
  81
  82 \membersection{wxStreamBase::GetSize}\label{wxstreambasegetsize}
  83
  84 \constfunc{size\_t}{GetSize}{\void}
  85
  86 This function returns the size of the stream. For example, for a file it is the size of
  87 the file).
  88
  89 \wxheading{Warning}
  90
  91 There are streams which do not have size by definition, such as socket streams.
  92 In that cases, GetSize returns an invalid size represented by
  93
  94 \begin{verbatim}
  95 ~(size_t)0
  96 \end{verbatim}
  97