X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/34636400a0018eba4a1f63dda18cf32e944b959e..dae87f93abd93555095575886b8b1ef126f0a0da:/docs/latex/wx/truntime.tex diff --git a/docs/latex/wx/truntime.tex b/docs/latex/wx/truntime.tex index df443465ea..04ee1e02a7 100644 --- a/docs/latex/wx/truntime.tex +++ b/docs/latex/wx/truntime.tex @@ -1,4 +1,4 @@ -\section{Run time class information overview}\label{runtimeclassoverview} +\section{Runtime class information (aka RTTI) overview}\label{runtimeclassoverview} Classes: \helpref{wxObject}{wxobject}, \helpref{wxClassInfo}{wxclassinfo}. @@ -9,26 +9,26 @@ just by knowing the name of a class, which makes facilities such as persistent storage hard to implement. Most C++ GUI frameworks overcome these limitations by means of a set of -macros and functions and wxWindows is no exception. As it originated before the -addition of RTTI to the standard C++ and as support for it still missing from -some (albeit old) compilers, wxWindows doesn't (yet) use it, but provides its +macros and functions and wxWidgets is no exception. As it originated before the +addition of RTTI to the C++ standard and as support for it is still missing from +some (albeit old) compilers, wxWidgets doesn't (yet) use it, but provides its own macro-based RTTI system. In the future, the standard C++ RTTI will be used though and you're encouraged -to use whenever possible \helpref{wxDynamicCast()}{wxdynamiccast} macro which, +to use whenever possible the \helpref{wxDynamicCast()}{wxdynamiccast} macro which, for the implementations that support it, is defined just as dynamic\_cast<> and -uses wxWindows RTTI for all the others. This macro is limited to wxWindows +uses wxWidgets RTTI for all the others. This macro is limited to wxWidgets classes only and only works with pointers (unlike the real dynamic\_cast<> which -also accepts referencies). +also accepts references). -Each class that you wish to be known the type system should have +Each class that you wish to be known to the type system should have a macro such as DECLARE\_DYNAMIC\_CLASS just inside the class declaration. The macro IMPLEMENT\_DYNAMIC\_CLASS should be in the implementation file. Note that these are entirely optional; use them if you wish to check object types, or create instances of classes using the class name. However, it is good to get into the habit of adding these macros for all classes. -Variations on these \helpref{macros}{macros} are used for multiple inheritance, and abstract +Variations on these \helpref{macros}{rttimacros} are used for multiple inheritance, and abstract classes that cannot be instantiated dynamically or otherwise. DECLARE\_DYNAMIC\_CLASS inserts a static wxClassInfo declaration into the @@ -50,11 +50,11 @@ to return an appropriate wxClassInfo pointer to use in this function. The function \helpref{wxCreateDynamicObject}{wxcreatedynamicobject} can be used to construct a new object of a given type, by supplying a string name. If you have a pointer to the wxClassInfo object instead, then you -can simply call wxClassInfo::CreateObject. +can simply call \helpref{wxClassInfo::CreateObject}{wxclassinfocreateobject}. \subsection{wxClassInfo}\label{wxclassinfooverview} -\overview{Run time class information overview}{runtimeclassoverview} +\overview{Runtime class information (aka RTTI) overview}{runtimeclassoverview} Class: \helpref{wxClassInfo}{wxclassinfo} @@ -78,7 +78,7 @@ You can get the wxClassInfo for an object using wxObject::GetClassInfo. See also \helpref{wxObject}{wxobject} and \helpref{wxCreateDynamicObject}{wxcreatedynamicobject}. -\subsection{Example} +\subsection{Example}\label{runtimeclassinformationexample} In a header file frame.h: