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1 | \section{\class{wxNotifyEvent}}\label{wxnotifyevent} | |
2 | ||
3 | This class is not used by the event handlers by itself, but is a base class | |
4 | for other event classes (such as \helpref{wxNotebookEvent}{wxnotebookevent}). | |
5 | ||
6 | It (or an object of a derived class) is sent when the controls state is being | |
7 | changed and allows the program to \helpref{Veto()}{wxnotifyeventveto} this | |
8 | change if it wants to prevent it from happening. | |
9 | ||
10 | \wxheading{Derived from} | |
11 | ||
12 | \helpref{wxCommandEvent}{wxcommandevent}\\ | |
13 | \helpref{wxEvent}{wxevent}\\ | |
14 | \helpref{wxEvtHandler}{wxevthandler}\\ | |
15 | \helpref{wxObject}{wxobject} | |
16 | ||
17 | \wxheading{Include files} | |
18 | ||
19 | <wx/event.h> | |
20 | ||
21 | \wxheading{Event table macros} | |
22 | ||
23 | None | |
24 | ||
25 | \wxheading{See also} | |
26 | ||
27 | \helpref{wxNotebookEvent}{wxnotebookevent} | |
28 | ||
29 | \latexignore{\rtfignore{\wxheading{Members}}} | |
30 | ||
31 | \membersection{wxNotifyEvent::wxNotifyEvent}\label{wxnotifyeventconstr} | |
32 | ||
33 | \func{}{wxNotifyEvent}{\param{wxEventType}{ eventType = wxEVT\_NULL}, \param{int}{ id = 0}} | |
34 | ||
35 | Constructor (used internally by wxWindows only). | |
36 | ||
37 | \membersection{wxNotifyEvent::IsAllowed}\label{wxnotifyeventisallowed} | |
38 | ||
39 | \constfunc{bool}{IsAllowed}{\void} | |
40 | ||
41 | Returns TRUE if the change is allowed (\helpref{Veto()}{wxnotifyeventveto} | |
42 | hasn't been called) or FALSE otherwise (if it was). | |
43 | ||
44 | \membersection{wxNotifyEvent::Veto}\label{wxnotifyeventveto} | |
45 | ||
46 | \func{void}{Veto}{\void} | |
47 | ||
48 | Prevents the change announced by this event from happening. | |
49 | ||
50 | It is in general a good idea to notify the user about the reasons for vetoing | |
51 | the change because otherwise the applications behaviour (which just refuses to | |
52 | do what the user wants) might be quite surprising. |