1\section{\class{wxNotebookEvent}}\label{wxnotebookevent} 2 3This class represents the events generated by a notebook control: currently, 4there are two of them. The PAGE\_CHANGING event is sent before the current 5page is changed. It allows the program to examine the current page (which 6can be retrieved with 7\helpref{GetOldSelection()}{wxnotebookeventgetoldselection}) and to veto the page 8change by calling \helpref{Veto()}{wxnotifyeventveto} if, for example, the 9current values in the controls of the old page are invalid. 10 11The second event - PAGE\_CHANGED - is sent after the page has been changed and 12the program cannot veto it any more, it just informs it about the page change. 13 14To summarize, if the program is interested in validating the page values 15before allowing the user to change it, it should process the PAGE\_CHANGING 16event, otherwise PAGE\_CHANGED is probably enough. In any case, it is probably 17unnecessary to process both events at once. 18 19\wxheading{Derived from} 20 21\helpref{wxNotifyEvent}{wxnotifyevent}\\ 22\helpref{wxCommandEvent}{wxcommandevent}\\ 23\helpref{wxEvent}{wxevent}\\ 24\helpref{wxObject}{wxobject} 25 26\wxheading{Include files} 27 28<wx/notebook.h> 29 30\input noteevt.inc 31 32\wxheading{See also} 33 34\helpref{wxNotebook}{wxnotebook} 35 36\latexignore{\rtfignore{\wxheading{Members}}} 37 38 39\membersection{wxNotebookEvent::wxNotebookEvent}\label{wxnotebookeventconstr} 40 41\func{}{wxNotebookEvent}{\param{wxEventType}{ eventType = wxEVT\_NULL}, 42 \param{int}{ id = 0}, \param{int}{ sel = $-1$}, \param{int}{ oldSel = $-1$}} 43 44Constructor (used internally by wxWidgets only). 45 46 47\membersection{wxNotebookEvent::GetOldSelection}\label{wxnotebookeventgetoldselection} 48 49\constfunc{int}{GetOldSelection}{\void} 50 51Returns the page that was selected before the change, $-1$ if none was selected. 52 53 54\membersection{wxNotebookEvent::GetSelection}\label{wxnotebookeventgetselection} 55 56\constfunc{int}{GetSelection}{\void} 57 58Returns the currently selected page, or $-1$ if none was selected. 59 60{\bf NB:} under Windows, GetSelection() will return the same value as\rtfsp 61\helpref{GetOldSelection()}{wxnotebookeventgetoldselection} when called from 62{\tt EVT\_NOTEBOOK\_PAGE\_CHANGING} handler and not the page which is going to 63be selected. Also note that the values of selection and old selection returned 64for an event generated in response to a call to 65\helpref{wxNotebook::SetSelection}{wxnotebooksetselection} shouldn't be trusted 66as they are currently inconsistent under different platforms (but in this case 67you presumably don't need them anyhow as you already have the corresponding 68information). 69 70 71\membersection{wxNotebookEvent::SetOldSelection}\label{wxnotebookeventsetoldselection} 72 73\func{void}{SetOldSelection}{\param{int}{ page}} 74 75Sets the id of the page selected before the change. 76 77 78\membersection{wxNotebookEvent::SetSelection}\label{wxnotebookeventsetselection} 79 80\func{void}{SetSelection}{\param{int}{ page}} 81 82Sets the selection member variable. 83 84\wxheading{See also} 85 86\helpref{wxNotebookEvent::GetSelection}{wxnotebookeventgetselection} 87 88 89