wxWidgets/wxPython/src/_evthandler.i

/////////////////////////////////////////////////////////////////////////////
// Name:        _evthandler.i
// Purpose:     SWIG interface for wxEventHandler
//
// Author:      Robin Dunn
//
// Created:     9-Aug-2003
// RCS-ID:      $Id$
// Copyright:   (c) 2003 by Total Control Software
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// Not a %module


//---------------------------------------------------------------------------
%newgroup

// wxEvtHandler: the base class for all objects handling wxWindows events
class wxEvtHandler : public wxObject {
public:
    // turn off this typemap
    %typemap(out) wxEvtHandler*;    

    %pythonAppend wxEvtHandler         "self._setOORInfo(self)"
    wxEvtHandler();

    // Turn it back on again
    %typemap(out) wxEvtHandler* { $result = wxPyMake_wxObject($1, $owner); }

    wxEvtHandler* GetNextHandler();
    wxEvtHandler* GetPreviousHandler();
    void SetNextHandler(wxEvtHandler* handler);
    void SetPreviousHandler(wxEvtHandler* handler);

    bool GetEvtHandlerEnabled();
    void SetEvtHandlerEnabled(bool enabled);


    // process an event right now
    bool ProcessEvent(wxEvent& event);

    // add an event to be processed later
    void AddPendingEvent(wxEvent& event);

    // process all pending events
    void ProcessPendingEvents();

    %extend {
        // Dynamic association of a member function handler with the event handler
        void Connect( int id, int lastId, int eventType, PyObject* func) {
            if (PyCallable_Check(func)) {
                self->Connect(id, lastId, eventType,
                          (wxObjectEventFunction) &wxPyCallback::EventThunker,
                          new wxPyCallback(func));
            }
            else if (func == Py_None) {
                self->Disconnect(id, lastId, eventType,
                                 (wxObjectEventFunction)
                                 &wxPyCallback::EventThunker);
            }
            else {
                wxPyBLOCK_THREADS(
                    PyErr_SetString(PyExc_TypeError, "Expected callable object or None."));
            }
        }

        bool Disconnect(int id, int lastId = -1,
                        wxEventType eventType = wxEVT_NULL) {
            return self->Disconnect(id, lastId, eventType,
                                   (wxObjectEventFunction)
                                    &wxPyCallback::EventThunker);
        }
    }

    %pythonAppend _setOORInfo   "args[0].this.own(False)";
    %extend {
        void _setOORInfo(PyObject* _self, bool incref=true) {
            if (_self && _self != Py_None) {
                self->SetClientObject(new wxPyOORClientData(_self, incref));
            }
            else {
                wxPyOORClientData* data = (wxPyOORClientData*)self->GetClientObject();
                if (data) {
                    self->SetClientObject(NULL);  // This will delete it too
                }
            }
        }
    }

    %pythoncode {
        def Bind(self, event, handler, source=None, id=wx.ID_ANY, id2=wx.ID_ANY):
            """
            Bind an event to an event handler.

            :param event: One of the EVT_* objects that specifies the
                          type of event to bind,

            :param handler: A callable object to be invoked when the
                          event is delivered to self.  Pass None to
                          disconnect an event handler.

            :param source: Sometimes the event originates from a
                          different window than self, but you still
                          want to catch it in self.  (For example, a
                          button event delivered to a frame.)  By
                          passing the source of the event, the event
                          handling system is able to differentiate
                          between the same event type from different
                          controls.

            :param id: Used to spcify the event source by ID instead
                       of instance.

            :param id2: Used when it is desirable to bind a handler
                          to a range of IDs, such as with EVT_MENU_RANGE.
            """
            if source is not None:
                id  = source.GetId()
            event.Bind(self, id, id2, handler)              

        def Unbind(self, event, source=None, id=wx.ID_ANY, id2=wx.ID_ANY):
            """
            Disconencts the event handler binding for event from self.
            Returns True if successful.
            """
            if source is not None:
                id  = source.GetId()
            return event.Unbind(self, id, id2)              
    }

    %property(EvtHandlerEnabled, GetEvtHandlerEnabled, SetEvtHandlerEnabled, doc="See `GetEvtHandlerEnabled` and `SetEvtHandlerEnabled`");
    %property(NextHandler, GetNextHandler, SetNextHandler, doc="See `GetNextHandler` and `SetNextHandler`");
    %property(PreviousHandler, GetPreviousHandler, SetPreviousHandler, doc="See `GetPreviousHandler` and `SetPreviousHandler`");
    
};

//---------------------------------------------------------------------------