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Public Member Functions
|NotifyEvent (IntPtr wxObject)|
It (or an object of a derived class) is sent when the controls state is being changed and allows the program to
Veto() this change if it wants to prevent it from happening.
For internal use only.
Call this to explicitely allow processing of this event. This is the opposite of
Veto(): it explicitly allows the event to be processed. For most events it is not necessary to call this method as the events are allowed anyhow but some are forbidden by default (this will be mentioned in the corresponding event description).
Prevents the change announced by this event from happening.
It is in general a good idea to notify the user about the reasons for vetoing the change because otherwise the applications behaviour (which just refuses to do what the user wants) might be quite surprising.