patch 1306473

[wxWidgets.git] / docs / latex / wx / event.tex

diff --git a/docs/latex/wx/event.tex b/docs/latex/wx/event.tex
index 5d4403d78f5a9af604ec4acd67498f0ac88cd428..817d5983a8c648c8b6889000e171e718dbd3f138 100644 (file)
--- a/docs/latex/wx/event.tex
+++ b/docs/latex/wx/event.tex
@@ -4,6 +4,11 @@ An event is a structure holding information about an event passed to a
 callback or member function. {\bf wxEvent} used to be a multipurpose
 event object, and is an abstract base class for other event classes (see below).
 
 callback or member function. {\bf wxEvent} used to be a multipurpose
 event object, and is an abstract base class for other event classes (see below).
 

+For more information about events, see the \helpref{Event handling overview}{eventhandlingoverview}.
+
+\perlnote{In wxPerl custom event classes should be derived from
+\texttt{Wx::PlEvent} and \texttt{Wx::PlCommandEvent}.}
+

 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}


@@ -19,133 +24,152 @@ event object, and is an abstract base class for other event classes (see below).
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 

-\membersection{wxEvent::wxEvent}
+\membersection{wxEvent::wxEvent}\label{wxeventctor}

 
 

-\func{}{wxEvent}{\param{int }{id = 0}}
+\func{}{wxEvent}{\param{int }{id = 0}, \param{wxEventType }{eventType = {\tt wxEVT\_NULL}}}

 
 Constructor. Should not need to be used directly by an application.
 
 
 Constructor. Should not need to be used directly by an application.
 

-\membersection{wxEvent::m\_eventObject}
-
-\member{wxObject*}{m\_eventObject}
-
-The object (usually a window) that the event was generated from,
-or should be sent to.
-
-\membersection{wxEvent::m\_eventType}
-
-\member{WXTYPE}{m\_eventType}
-
-The type of the event, such as wxEVENT\_TYPE\_BUTTON\_COMMAND.
-
-\membersection{wxEvent::m\_id}
+\membersection{wxEvent::m\_propagationLevel}\label{wxeventmpropagationlevel}

 
 

-\member{int}{m\_id}
+\member{int}{m\_propagationLevel}

 
 

-Identifier for the window.
+Indicates how many levels the event can propagate. This member is protected and
+should typically only be set in the constructors of the derived classes. It
+may be temporarily changed by \helpref{StopPropagation}{wxeventstoppropagation} 
+and \helpref{ResumePropagation}{wxeventresumepropagation} and tested with 
+\helpref{ShouldPropagate}{wxeventshouldpropagate}.

 
 

-\membersection{wxEvent::m\_skipped}
+The initial value is set to either {\tt wxEVENT\_PROPAGATE\_NONE} (by
+default) meaning that the event shouldn't be propagated at all or to 
+{\tt wxEVENT\_PROPAGATE\_MAX} (for command events) meaning that it should be
+propagated as much as necessary.

 
 

-\member{bool}{m\_skipped}
-
-Set to TRUE by {\bf Skip} if this event should be skipped.
-
-\membersection{wxEvent::m\_timeStamp}
-
-\member{long}{m\_timeStamp}
-
-Timestamp for this event.
+Any positive number means that the event should be propagated but no more than
+the given number of times. E.g. the propagation level may be set to $1$ to
+propagate the event to its parent only, but not to its grandparent.

 
 \membersection{wxEvent::Clone}\label{wxeventclone}
 
 
 \membersection{wxEvent::Clone}\label{wxeventclone}
 

-\func{virtual wxEvent*}{Clone}{\void} const
+\constfunc{virtual wxEvent*}{Clone}{\void}

 
 Returns a copy of the event.
 
 
 Returns a copy of the event.
 

-Any event that is posted to the wxWindows event system for later action (via
+Any event that is posted to the wxWidgets event system for later action (via

 \helpref{wxEvtHandler::AddPendingEvent}{wxevthandleraddpendingevent} or
 \helpref{wxEvtHandler::AddPendingEvent}{wxevthandleraddpendingevent} or

-\helpref{wxPostEvent}{wxpostevent}) must implement this method. All wxWindows
+\helpref{wxPostEvent}{wxpostevent}) must implement this method. All wxWidgets

 events fully implement this method, but any derived events implemented by the
 user should also implement this method just in case they (or some event
 derived from them) are ever posted.
 
 events fully implement this method, but any derived events implemented by the
 user should also implement this method just in case they (or some event
 derived from them) are ever posted.
 

-All wxWindows events implement a copy constructor, so the easiest way of
+All wxWidgets events implement a copy constructor, so the easiest way of

 implementing the Clone function is to implement a copy constructor for
 a new event (call it MyEvent) and then define the Clone function like this:
 implementing the Clone function is to implement a copy constructor for
 a new event (call it MyEvent) and then define the Clone function like this:

+

 \begin{verbatim}
     wxEvent *Clone(void) const { return new MyEvent(*this); }
 \end{verbatim}
 
 \begin{verbatim}
     wxEvent *Clone(void) const { return new MyEvent(*this); }
 \end{verbatim}
 

-\membersection{wxEvent::GetEventObject}
+\membersection{wxEvent::GetEventObject}\label{wxeventgeteventobject}

 
 \func{wxObject*}{GetEventObject}{\void}
 
 
 \func{wxObject*}{GetEventObject}{\void}
 

-Returns the object associated with the
+Returns the object (usually a window) associated with the

 event, if any.
 
 event, if any.
 

-\membersection{wxEvent::GetEventType}
+\membersection{wxEvent::GetEventType}\label{wxeventgeteventtype}

 
 \func{WXTYPE}{GetEventType}{\void}
 
 Returns the identifier of the given event type,
 such as wxEVENT\_TYPE\_BUTTON\_COMMAND.
 
 
 \func{WXTYPE}{GetEventType}{\void}
 
 Returns the identifier of the given event type,
 such as wxEVENT\_TYPE\_BUTTON\_COMMAND.
 

-\membersection{wxEvent::GetId}
+\membersection{wxEvent::GetId}\label{wxeventgetid}

 
 

-\func{int}{GetId}{\void}
+\constfunc{int}{GetId}{\void}

 
 Returns the identifier associated with this event, such as a button command id.
 
 
 Returns the identifier associated with this event, such as a button command id.
 

-\membersection{wxEvent::GetObjectType}
+\membersection{wxEvent::GetSkipped}\label{wxeventgetskipped}
+
+\constfunc{bool}{GetSkipped}{\void}
+
+Returns true if the event handler should be skipped, false otherwise.

 
 

-\func{WXTYPE}{GetObjectType}{\void}
+\membersection{wxEvent::GetTimestamp}\label{wxeventgettimestamp}

 
 

-Returns the type of the object associated with the
-event, such as wxTYPE\_BUTTON.
+\func{long}{GetTimestamp}{\void}

 
 

-\membersection{wxEvent::GetSkipped}
+Gets the timestamp for the event.

 
 

-\func{bool}{GetSkipped}{\void}
+\membersection{wxEvent::IsCommandEvent}\label{wxeventiscommandevent}

 
 

-Returns TRUE if the event handler should be skipped, FALSE otherwise.
+\constfunc{bool}{IsCommandEvent}{\void}

 
 

-\membersection{wxEvent::GetTimestamp}
+Returns true if the event is or is derived from
+\helpref{wxCommandEvent}{wxcommandevent} else it returns false.
+Note: Exists only for optimization purposes.

 
 

-\func{long}{GetTimestamp}{\void}

 
 

-Gets the timestamp for the event.
+\membersection{wxEvent::ResumePropagation}\label{wxeventresumepropagation}

 
 

-\membersection{wxEvent::SetEventObject}
+\func{void}{ResumePropagation}{\param{int }{propagationLevel}}
+
+Sets the propagation level to the given value (for example returned from an
+earlier call to \helpref{StopPropagation}{wxeventstoppropagation}).
+
+
+\membersection{wxEvent::SetEventObject}\label{wxeventseteventobject}

 
 \func{void}{SetEventObject}{\param{wxObject* }{object}}
 
 Sets the originating object.
 
 
 \func{void}{SetEventObject}{\param{wxObject* }{object}}
 
 Sets the originating object.
 

-\membersection{wxEvent::SetEventType}
+\membersection{wxEvent::SetEventType}\label{wxeventseteventtype}

 
 \func{void}{SetEventType}{\param{WXTYPE }{typ}}
 
 Sets the event type.
 
 
 \func{void}{SetEventType}{\param{WXTYPE }{typ}}
 
 Sets the event type.
 

-\membersection{wxEvent::SetId}
+\membersection{wxEvent::SetId}\label{wxeventsetid}

 
 \func{void}{SetId}{\param{int}{ id}}
 
 Sets the identifier associated with this event, such as a button command id.
 
 
 \func{void}{SetId}{\param{int}{ id}}
 
 Sets the identifier associated with this event, such as a button command id.
 

-\membersection{wxEvent::SetTimestamp}
+\membersection{wxEvent::SetTimestamp}\label{wxeventsettimestamp}

 
 \func{void}{SetTimestamp}{\param{long }{timeStamp}}
 
 Sets the timestamp for the event.
 
 
 \func{void}{SetTimestamp}{\param{long }{timeStamp}}
 
 Sets the timestamp for the event.
 

-Sets the originating object.
+\membersection{wxEvent::ShouldPropagate}\label{wxeventshouldpropagate}
+
+\constfunc{bool}{ShouldPropagate}{\void}
+
+Test if this event should be propagated or not, i.e. if the propagation level
+is currently greater than $0$.

 
 \membersection{wxEvent::Skip}\label{wxeventskip}
 
 
 \membersection{wxEvent::Skip}\label{wxeventskip}
 

-\func{void}{Skip}{\param{bool}{ skip = TRUE}}
+\func{void}{Skip}{\param{bool}{ skip = true}}
+
+Called by an event handler, it controls whether additional event
+handlers bound to this event will be called after the current event
+handler returns.  Skip(false) (the default behavior) will prevent
+additional event handlers from being called and control will be
+returned to the sender of the event immediately after the current
+handler has finished.  Skip(true) will cause the event processing
+system to continue searching for a handler function for this event.
+
+
+\membersection{wxEvent::StopPropagation}\label{wxeventstoppropagation}
+
+\func{int}{StopPropagation}{\void}
+
+Stop the event from propagating to its parent window.

 
 

-Called by an event handler to tell the event system that the
-event handler should be skipped, and the next valid handler used
-instead.
+Returns the old propagation level value which may be later passed to 
+\helpref{ResumePropagation}{wxeventresumepropagation} to allow propagating the
+event again.