NAME

       wxEvtHandler - Functions for wxEvtHandler class

DESCRIPTION

       A  class  that can handle events from the windowing system. wxWindow is (and therefore all
       window classes are) derived from this class.

       To get events from wxwidgets objects you subscribe to them by calling connect/3.

       If the callback option is not supplied events are sent as messages.

       These messages  will  be  #wx{}  where  EventRecord  is  a  record  that  depends  on  the
       wxEventType. The records are defined in: wx/include/wx.hrl.

       If  a  callback was supplied to connect, the callback will be invoked (in another process)
       to handle the event. The callback should be of arity 2.

       fun Callback (EventRecord::wx(), EventObject::wxObject()).

       Note: The callback will be in executed in new process each time.

       See: Overview events

       wxWidgets docs: wxEvtHandler

DATA TYPES

       wxEvtHandler() = wx:wx_object()

       wxEventType() =
           wxActivateEvent:wxActivateEventType() |
           wxAuiManagerEvent:wxAuiManagerEventType() |
           wxAuiNotebookEvent:wxAuiNotebookEventType() |
           wxBookCtrlEvent:wxBookCtrlEventType() |
           wxCalendarEvent:wxCalendarEventType() |
           wxChildFocusEvent:wxChildFocusEventType() |
           wxClipboardTextEvent:wxClipboardTextEventType() |
           wxCloseEvent:wxCloseEventType() |
           wxColourPickerEvent:wxColourPickerEventType() |
           wxCommandEvent:wxCommandEventType() |
           wxContextMenuEvent:wxContextMenuEventType() |
           wxDateEvent:wxDateEventType() |
           wxDisplayChangedEvent:wxDisplayChangedEventType() |
           wxDropFilesEvent:wxDropFilesEventType() |
           wxEraseEvent:wxEraseEventType() |
           wxFileDirPickerEvent:wxFileDirPickerEventType() |
           wxFocusEvent:wxFocusEventType() |
           wxFontPickerEvent:wxFontPickerEventType() |
           wxGridEvent:wxGridEventType() |
           wxHelpEvent:wxHelpEventType() |
           wxHtmlLinkEvent:wxHtmlLinkEventType() |
           wxIconizeEvent:wxIconizeEventType() |
           wxIdleEvent:wxIdleEventType() |
           wxInitDialogEvent:wxInitDialogEventType() |
           wxJoystickEvent:wxJoystickEventType() |
           wxKeyEvent:wxKeyEventType() |
           wxListEvent:wxListEventType() |
           wxMaximizeEvent:wxMaximizeEventType() |
           wxMenuEvent:wxMenuEventType() |
           wxMouseCaptureChangedEvent:wxMouseCaptureChangedEventType() |
           wxMouseCaptureLostEvent:wxMouseCaptureLostEventType() |
           wxMouseEvent:wxMouseEventType() |
           wxMoveEvent:wxMoveEventType() |
           wxNavigationKeyEvent:wxNavigationKeyEventType() |
           wxPaintEvent:wxPaintEventType() |
           wxPaletteChangedEvent:wxPaletteChangedEventType() |
           wxQueryNewPaletteEvent:wxQueryNewPaletteEventType() |
           wxSashEvent:wxSashEventType() |
           wxScrollEvent:wxScrollEventType() |
           wxScrollWinEvent:wxScrollWinEventType() |
           wxSetCursorEvent:wxSetCursorEventType() |
           wxShowEvent:wxShowEventType() |
           wxSizeEvent:wxSizeEventType() |
           wxSpinEvent:wxSpinEventType() |
           wxSplitterEvent:wxSplitterEventType() |
           wxStyledTextEvent:wxStyledTextEventType() |
           wxSysColourChangedEvent:wxSysColourChangedEventType() |
           wxTaskBarIconEvent:wxTaskBarIconEventType() |
           wxTreeEvent:wxTreeEventType() |
           wxUpdateUIEvent:wxUpdateUIEventType() |
           wxWebViewEvent:wxWebViewEventType() |
           wxWindowCreateEvent:wxWindowCreateEventType() |
           wxWindowDestroyEvent:wxWindowDestroyEventType()

       wx() =
           #wx{id = integer(),
               obj = wx:wx_object(),
               userData = term(),
               event = event()}

       event() =
           wxActivateEvent:wxActivate() |
           wxAuiManagerEvent:wxAuiManager() |
           wxAuiNotebookEvent:wxAuiNotebook() |
           wxBookCtrlEvent:wxBookCtrl() |
           wxCalendarEvent:wxCalendar() |
           wxChildFocusEvent:wxChildFocus() |
           wxClipboardTextEvent:wxClipboardText() |
           wxCloseEvent:wxClose() |
           wxColourPickerEvent:wxColourPicker() |
           wxCommandEvent:wxCommand() |
           wxContextMenuEvent:wxContextMenu() |
           wxDateEvent:wxDate() |
           wxDisplayChangedEvent:wxDisplayChanged() |
           wxDropFilesEvent:wxDropFiles() |
           wxEraseEvent:wxErase() |
           wxFileDirPickerEvent:wxFileDirPicker() |
           wxFocusEvent:wxFocus() |
           wxFontPickerEvent:wxFontPicker() |
           wxGridEvent:wxGrid() |
           wxHelpEvent:wxHelp() |
           wxHtmlLinkEvent:wxHtmlLink() |
           wxIconizeEvent:wxIconize() |
           wxIdleEvent:wxIdle() |
           wxInitDialogEvent:wxInitDialog() |
           wxJoystickEvent:wxJoystick() |
           wxKeyEvent:wxKey() |
           wxListEvent:wxList() |
           wxMaximizeEvent:wxMaximize() |
           wxMenuEvent:wxMenu() |
           wxMouseCaptureChangedEvent:wxMouseCaptureChanged() |
           wxMouseCaptureLostEvent:wxMouseCaptureLost() |
           wxMouseEvent:wxMouse() |
           wxMoveEvent:wxMove() |
           wxNavigationKeyEvent:wxNavigationKey() |
           wxPaintEvent:wxPaint() |
           wxPaletteChangedEvent:wxPaletteChanged() |
           wxQueryNewPaletteEvent:wxQueryNewPalette() |
           wxSashEvent:wxSash() |
           wxScrollEvent:wxScroll() |
           wxScrollWinEvent:wxScrollWin() |
           wxSetCursorEvent:wxSetCursor() |
           wxShowEvent:wxShow() |
           wxSizeEvent:wxSize() |
           wxSpinEvent:wxSpin() |
           wxSplitterEvent:wxSplitter() |
           wxStyledTextEvent:wxStyledText() |
           wxSysColourChangedEvent:wxSysColourChanged() |
           wxTaskBarIconEvent:wxTaskBarIcon() |
           wxTreeEvent:wxTree() |
           wxUpdateUIEvent:wxUpdateUI() |
           wxWebViewEvent:wxWebView() |
           wxWindowCreateEvent:wxWindowCreate() |
           wxWindowDestroyEvent:wxWindowDestroy()

EXPORTS

       connect(This :: wxEvtHandler(), EventType :: wxEventType()) -> ok

       connect(This :: wxEvtHandler(),
               EventType :: wxEventType(),
               Options :: [Option]) ->
                  ok

              Types:

                 Option =
                     {id, integer()} |
                     {lastId, integer()} |
                     {skip, boolean()} |
                     callback |
                     {callback, function()} |
                     {userData, term()}

              This function subscribes to events.

              Subscribes to events of type EventType, in the range id, lastId.

              The events will be received as messages if no callback is supplied.

              Options

              id:{id, integer()}  The identifier  (or  first  of  the  identifier  range)  to  be
              associated with this event handler. Default is ?wxID_ANY

              lastid:{lastId,integer()}    The  second part of the identifier range. If used 'id'
              must be set as the starting identifier range. Default is ?wxID_ANY

              skip:{skip,boolean()}  If skip is true further event_handlers will be called.  This
              is not used if the 'callback' option is used. Default is false.

              callback:{callback,function()}                                 Use                a
              callbackfun(EventRecord::wx(),EventObject::wxObject())    to  process  the   event.
              Default  not  specfied i.e. a message will be delivered to the process calling this
              function.

              userData:{userData,term()}  An erlang term  that  will  be  sent  with  the  event.
              Default: [].

       disconnect(This :: wxEvtHandler()) -> boolean()

       disconnect(This :: wxEvtHandler(), EventType :: wxEventType()) ->
                     boolean()

       disconnect(This :: wxEvtHandler(),
                  EventType :: wxEventType(),
                  Opts :: [Option]) ->
                     boolean()

              Types:

                 Option =
                     {id, integer()} | {lastId, integer()} | {callback, function()}

              This function unsubscribes the process or callback fun from the event handler.

              EventType  may  be  the atom 'null' to match any eventtype. Notice that the options
              skip and userdata is not used to match the eventhandler.