mirror of https://github.com/python/cpython
75 lines
3.0 KiB
TeX
75 lines
3.0 KiB
TeX
\section{Built-in Module \sectcode{MacOS}}
|
|
\bimodindex{MacOS}
|
|
|
|
\renewcommand{\indexsubitem}{(in module MacOS)}
|
|
|
|
This module provides access to MacOS specific functionality in the
|
|
python interpreter, such as how the interpreter eventloop functions
|
|
and the like. Use with care.
|
|
|
|
Note the capitalisation of the module name, this is a historical
|
|
artefact.
|
|
|
|
\begin{excdesc}{Error}
|
|
This exception is raised on MacOS generated errors, either from
|
|
functions in this module or from other mac-specific modules like the
|
|
toolbox interfaces. The arguments are the integer error code (the
|
|
\var{OSErr} value) and a textual description of the error code.
|
|
\end{excdesc}
|
|
|
|
\begin{funcdesc}{SetHighLevelEventHandler}{handler}
|
|
Pass a python function that will be called upon reception of a
|
|
high-level event. The previous handler is returned. The handler
|
|
function is called with the event as argument.
|
|
|
|
Note that your event handler is currently only called dependably if
|
|
your main event loop is in \var{stdwin}.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{AcceptHighLevelEvent}{}
|
|
Read a high-level event. The return value is a tuple \code{(sender,
|
|
refcon, data)}.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{SetScheduleTimes}{fgi\, fgy \optional{\, bgi\, bgy}}
|
|
Controls how often the interpreter checks the event queue and how
|
|
long it will yield the processor to other processes. \var{fgi}
|
|
specifies after how many clicks (one click is one 60th of a second)
|
|
the interpreter should check the event queue, and \var{fgy} specifies
|
|
for how many clicks the CPU should be yielded when in the
|
|
foreground. The optional \var{bgi} and \var{bgy} allow you to specify
|
|
different values to use when python runs in the background, otherwise
|
|
the background values will be set the the same as the foreground
|
|
values. The function returns nothing.
|
|
|
|
The default values, which are based on nothing at all, are 12, 6, 1
|
|
and 12 respectively.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{EnableAppswitch}{onoff}
|
|
Enable or disable the python event loop, based on the value of
|
|
\var{onoff}. The old value is returned. If the event loop is disabled
|
|
no time is granted to other applications, checking for command-period
|
|
is not performed and it is impossible to switch applications. This
|
|
should only be used by programs providing their own complete event
|
|
loop.
|
|
|
|
Note that based on the compiler used to build python it is still
|
|
possible to loose events even with the python event loop disabled. If
|
|
you have a \code{sys.stdout} window its handler will often also look
|
|
in the event queue. Making sure nothing is ever printed works around
|
|
this.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{HandleEvent}{ev}
|
|
Pass the event record \code{ev} back to the python event loop, or
|
|
possibly to the handler for the \code{sys.stdout} window (based on the
|
|
compiler used to build python). This allows python programs that do
|
|
their own event handling to still have some command-period and
|
|
window-switching capability.
|
|
\end{funcdesc}
|
|
|
|
\begin{funcdesc}{GetErrorString}{errno}
|
|
Return the textual description of MacOS error code \var{errno}.
|
|
\end{funcdesc}
|