X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f3a65071987ac699afa1cf7edf909f5770244dba..5740d24a02d9dbc46cc62268a910f1a23e13003d:/docs/latex/wx/list.tex diff --git a/docs/latex/wx/list.tex b/docs/latex/wx/list.tex index 6e53b0e541..dc6ace118a 100644 --- a/docs/latex/wx/list.tex +++ b/docs/latex/wx/list.tex @@ -19,7 +19,7 @@ data but make all of its dangerous (because untyped) functions protected, so that they can only be used from derived classes which, in turn, expose a type safe interface. With this approach a new wxList-like class must be defined for each list type (i.e. list of ints, of wxStrings or of MyObjects). This is done -with {\it WX\_DECLARE\_LIST} and {\it WX\_IMPLEMENT\_LIST} macros like this +with {\it WX\_DECLARE\_LIST} and {\it WX\_DEFINE\_LIST} macros like this (notice the similarity with WX\_DECLARE\_OBJARRAY and WX\_IMPLEMENT\_OBJARRAY macros): @@ -35,7 +35,7 @@ macros): // declare our list class: this macro declares and partly implements MyList // class (which derives from wxListBase) - WX_DECLARE_LIST(MyListElement, MyList) + WX_DECLARE_LIST(MyListElement, MyList); ... @@ -44,15 +44,15 @@ macros): // usually it will be found in the source file and not in the header #include - WX_DEFINE_LIST(MyList) + WX_DEFINE_LIST(MyList); // now MyList class may be used as a usual wxList, but all of its methods // will take/return the objects of the right (i.e. MyListElement) type. You // also have MyList::Node type which is the type-safe version of wxNode. MyList list; MyListElement element; - list.Add(element); // ok - list.Add(17); // error: incorrect type + list.Append(element); // ok + list.Append(17); // error: incorrect type // let's iterate over the list for ( MyList::Node *node = list.GetFirst(); node; node = node->GetNext() ) @@ -66,13 +66,21 @@ macros): For compatibility with previous versions wxList and wxStringList classes are still defined, but their usage is deprecated and they will disappear in the -future versions completely. +future versions completely. The use of the latter is especially discouraged as +it is not only unsafe but is also much less efficient than +\helpref{wxArrayString|{wxarraystring} class. + +In the documentation of the list classes below, you should replace wxNode with +wxListName::Node and wxObject with the list element type (i.e. the first +parameter of WX\_DECLARE\_LIST) for the template lists. \wxheading{Derived from} \helpref{wxObject}{wxobject} -{\bf WARNING: } the rest of documentation may be out-of-date. +\wxheading{Include files} + + \wxheading{Example} @@ -80,21 +88,21 @@ It is very common to iterate on a list as follows: \begin{verbatim} ... - wxPoint *point1 = new wxPoint(100, 100); - wxPoint *point2 = new wxPoint(200, 200); + wxWindow *win1 = new wxWindow(...); + wxWindow *win2 = new wxWindow(...); wxList SomeList; - SomeList.Append(point1); - SomeList.Append(point2); + SomeList.Append(win1); + SomeList.Append(win2); ... wxNode *node = SomeList.GetFirst(); while (node) { - wxPoint *point = (wxPoint *)node->Data(); + wxWindow *win = node->GetData(); ... - node = node->Next(); + node = node->GetNext(); } \end{verbatim} @@ -102,7 +110,7 @@ To delete nodes in a list as the list is being traversed, replace \begin{verbatim} ... - node = node->Next(); + node = node->GetNext(); ... \end{verbatim} @@ -110,7 +118,7 @@ with \begin{verbatim} ... - delete point; + delete win; delete node; node = SomeList.GetFirst(); ... @@ -119,10 +127,6 @@ with See \helpref{wxNode}{wxnode} for members that retrieve the data associated with a node, and members for getting to the next or previous node. -Note that a cast is required when retrieving the data from a node. Although a -node is defined to store objects of type {\bf wxObject} and derived types, other -types (such as char*) may be used with appropriate casting. - \wxheading{See also} \helpref{wxNode}{wxnode}, \helpref{wxStringList}{wxstringlist}, @@ -155,7 +159,7 @@ terminating NULL. Destroys the list. Also destroys any remaining nodes, but does not destroy client data held in the nodes. -\membersection{wxList::Append} +\membersection{wxList::Append}\label{wxlistappend} \func{wxNode *}{Append}{\param{wxObject *}{object}} @@ -169,11 +173,12 @@ later retrieval using the key. The new node is returned in each case. The key string is copied and stored by the list implementation. -\membersection{wxList::Clear} +\membersection{wxList::Clear}\label{wxlistclear} \func{void}{Clear}{\void} -Clears the list (but does not delete the client data stored with each node). +Clears the list (but does not delete the client data stored with each node +unless you called DeleteContents(TRUE), in which case it deletes data). \membersection{wxList::DeleteContents}\label{wxlistdeletecontents} @@ -182,20 +187,20 @@ Clears the list (but does not delete the client data stored with each node). If {\it destroy} is TRUE, instructs the list to call {\it delete} on the client contents of a node whenever the node is destroyed. The default is FALSE. -\membersection{wxList::DeleteNode} +\membersection{wxList::DeleteNode}\label{wxlistdeletenode} \func{bool}{DeleteNode}{\param{wxNode *}{node}} Deletes the given node from the list, returning TRUE if successful. -\membersection{wxList::DeleteObject} +\membersection{wxList::DeleteObject}\label{wxlistdeleteobject} \func{bool}{DeleteObject}{\param{wxObject *}{object}} Finds the given client {\it object} and deletes the appropriate node from the list, returning TRUE if successful. The application must delete the actual object separately. -\membersection{wxList::Find} +\membersection{wxList::Find}\label{wxlistfind} \func{wxNode *}{Find}{\param{long}{ key}} @@ -203,56 +208,80 @@ TRUE if successful. The application must delete the actual object separately. Returns the node whose stored key matches {\it key}. Use on a keyed list only. -\membersection{wxList::GetFirst} +\membersection{wxList::GetCount}\label{wxlistgetcount} + +\constfunc{size\_t}{GetCount}{\void} + +Returns the number of elements in the list. + +\membersection{wxList::GetFirst}\label{wxlistgetfirst} \func{wxNode *}{GetFirst}{\void} Returns the first node in the list (NULL if the list is empty). -\membersection{wxList::IndexOf} +\membersection{wxList::GetLast}\label{wxlistgetlast} + +\func{wxNode *}{GetLast}{\void} + +Returns the last node in the list (NULL if the list is empty). + +\membersection{wxList::IndexOf}\label{wxlistindexof} \func{int}{IndexOf}{\param{wxObject*}{ obj }} -Returns the index of {\it obj} within the list or NOT\_FOUND if {\it obj} +Returns the index of {\it obj} within the list or NOT\_FOUND if {\it obj} is not found in the list. -\membersection{wxList::Insert} +\membersection{wxList::Insert}\label{wxlistinsert} \func{wxNode *}{Insert}{\param{wxObject *}{object}} Insert object at front of list. -\func{wxNode *}{Insert}{\param{wxNode *}{position}, \param{wxObject *}{object}} +\func{wxNode *}{Insert}{\param{size\_t }{position}, \param{wxObject *}{object}} -Insert object before {\it position}. +Insert object before {\it position}, i.e. the index of the new item in the +list will be equal to {\it position}. {\it position} should be less than or +equal to \helpref{GetCount}{wxlistgetcount}; if it is equal to it, this is the +same as calling \helpref{Append}{wxlistappend}. +\func{wxNode *}{Insert}{\param{wxNode *}{node}, \param{wxObject *}{object}} -\membersection{wxList::GetLast} +Inserts the object before the given {\it node}. -\func{wxNode *}{GetLast}{\void} +\membersection{wxList::Item}\label{wxlistitem} -Returns the last node in the list (NULL if the list is empty). +\constfunc{wxNode *}{Item}{\param{size\_t }{index}} + +Returns the node at given position in the list. -\membersection{wxList::Member} +\membersection{wxList::Member}\label{wxlistmember} \func{wxNode *}{Member}{\param{wxObject *}{object}} +{\bf NB:} This function is deprecated, use \helpref{Find}{wxlistfind} instead. + Returns the node associated with {\it object} if it is in the list, NULL otherwise. -\membersection{wxList::Nth} +\membersection{wxList::Nth}\label{wxlistnth} \func{wxNode *}{Nth}{\param{int}{ n}} +{\bf NB:} This function is deprecated, use \helpref{Item}{wxlistitem} instead. + Returns the {\it nth} node in the list, indexing from zero (NULL if the list is empty or the nth node could not be found). -\membersection{wxList::Number} +\membersection{wxList::Number}\label{wxlistnumber} \func{int}{Number}{\void} +{\bf NB:} This function is deprecated, use \helpref{GetCount}{wxlistgetcount} instead. + Returns the number of elements in the list. -\membersection{wxList::Sort} +\membersection{wxList::Sort}\label{wxlistsort} \func{void}{Sort}{\param{wxSortCompareFunction}{ compfunc}} @@ -263,8 +292,12 @@ Returns the number of elements in the list. Allows the sorting of arbitrary lists by giving a function to compare two list elements. We use the system {\bf qsort} function -for the actual sorting process. The sort function receives pointers to wxObject pointers (wxObject **), -so be careful to dereference appropriately. +for the actual sorting process. + +If you use untyped wxList the sort function receives pointers to wxObject +pointers (wxObject **), so be careful to dereference appropriately - but, +of course, a better solution is to use list of appropriate type defined with +{\tt WX\_DECLARE\_LIST}. Example: @@ -286,4 +319,3 @@ Example: } \end{verbatim} -