Main Page   Class Hierarchy   Compound List   File List   Compound Members   File Members   Related Pages   Examples  

sdlmessageobject.h

Go to the documentation of this file.
00001 /*
00002     ParaGUI - crossplatform widgetset
00003     Copyright (C) 2000  Alexander Pipelka
00004  
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009  
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014  
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018  
00019     Alexander Pipelka
00020     pipelka@teleweb.at
00021  
00022     Last Update:      $Author: pipelka $
00023     Update Date:      $Date: 2001/01/31 17:23:16 $
00024     Source File:      $Source: /usr/local/CVSROOT/linux/paragui/doc/html/sdlmessageobject_h-source.html,v $
00025     CVS/RCS Revision: $Revision: 1.34 $
00026     Status:           $State: Exp $
00027 */
00028 
00029 #ifndef SDLMESSAGEOBJECT_H
00030 #define SDLMESSAGEOBJECT_H
00031 
00032 #ifdef SWIG
00033 %include "swigcommon.h"
00034 %module sdlmessageobject
00035 %{
00036 #include "sdlmessageobject.h"
00037 %}
00038 #endif
00039 
00040 #include "paragui.h"
00041 
00042 //class SDLMessageObject;
00043 class SDLWidget;
00044 
00053 class DECLSPEC SDLMessageObject {
00054 
00055 public:
00062     SDLMessageObject();
00063 
00067     virtual ~SDLMessageObject();
00068 
00076     void EnableReceiver(bool enable);
00077 
00082     SDLMessageObject* SetCapture();
00083 
00087     void ReleaseCapture();
00088 
00090     SDLMessageObject* SetInputFocus();
00091 
00093     void ReleaseInputFocus();
00094 
00098     int RunEventLoop(void* data);
00099 
00103     bool IsEnabled();
00104 
00106     bool SendMessage(SDLMessageObject* target, MSG_TYPE type, MSG_ID id, MSG_DATA data);
00107 
00109     void SetEventCallback(MSG_TYPE type, MSG_CALLBACK cbfunc, void *clientdata = NULL);
00110     
00119     static int PumpIntoEventQueue(const SDL_Event* event);
00120 
00122     SDL_Event WaitEvent(Uint32 delay=0);
00123 
00124 protected:
00125 
00134     virtual bool eventActive(const SDL_ActiveEvent* active);
00135 
00145     virtual bool eventKeyDown(const SDL_KeyboardEvent* key);
00146 
00156     virtual bool eventKeyUp(const SDL_KeyboardEvent* key);
00157 
00167     virtual bool eventMouseMotion(const SDL_MouseMotionEvent* motion);
00168 
00178     virtual bool eventMouseButtonDown(const SDL_MouseButtonEvent* button);
00179 
00189     virtual bool eventMouseButtonUp(const SDL_MouseButtonEvent* button);
00190 
00199     virtual bool eventQuit(int id, SDLWidget* widget, unsigned long data);
00200 
00209     virtual bool eventSysWM(const SDL_SysWMEvent* syswm);
00210 
00219     virtual bool eventMessage(MSG_MESSAGE* msg);
00220 
00222     virtual bool eventButtonClick(int id, SDLWidget* widget);
00223 
00225     virtual bool eventScrollPos(int id, SDLWidget* widget, unsigned long data);
00226 
00228     virtual bool eventScrollTrack(int id, SDLWidget* widget, unsigned long data);
00229 
00231     virtual void eventInputFocusLost(SDLMessageObject* newfocus);
00232 
00234     virtual void eventIdle();
00235     
00244     virtual bool AcceptEvent(const SDL_Event* event);
00245 
00253     virtual bool ProcessEvent(const SDL_Event* event);
00254 
00255     bool my_quitEventLoop;
00256 
00257 private:
00258 
00259     SDLMessageObject(const SDLMessageObject&);
00260     SDLMessageObject& operator=(const SDLMessageObject&);
00261 
00262     static void SetObjectList(SDLMessageObject* list);
00263     void RemoveObject(SDLMessageObject* obj);
00264 
00265     static SDLMessageObject* objectList;
00266     static SDLMessageObject* captureObject;
00267     static SDLMessageObject* inputFocusObject;
00268 
00269     SDLMessageObject* my_oldCapture;
00270     SDLMessageObject* my_oldFocus;
00271     SDLMessageObject* my_objectNext;
00272 
00273     bool my_canReceiveMessages;
00274 
00275     // mutexes
00276 
00277     SDL_mutex* my_mutexSendMessage;
00278     SDL_mutex* my_mutexReceiveMessage;
00279     
00280     // callback functions
00281     
00282     /*
00283     MSG_CALLBACK my_cbFunc[MSG_TABLE_SIZE];
00284     void* my_cbData[MSG_TABLE_SIZE];
00285     */
00286 };
00287 
00288 
00289 #ifdef SWIG
00290 
00291 // Grab a Python function object as a Python object.
00292 %typemap(python,in) PyObject *pyfunc {
00293    if (!PyCallable_Check($source)) {
00294       PyErr_SetString(PyExc_TypeError, "Need a callable object!");
00295       return NULL;
00296    }
00297    $target = $source;
00298 }
00299 
00300 
00301 %{
00302 
00303    /* This function matches the prototype of the normal C callback
00304       function for our widget. However, we use the clientdata pointer
00305       for holding a reference to a Python callable object. */
00306 static bool PythonCallBack(int id, SDLWidget *widget, unsigned long data, void *clientdata)
00307 {
00308    PyObject *func, *arglist;
00309    PyObject *result;
00310    bool     res = 0;
00311    
00312    func = (PyObject *) clientdata;               // Get Python function
00313    arglist = Py_BuildValue("(ill)",id,widget,data);// Build argument list
00314    result = PyEval_CallObject(func,arglist);     // Call Python
00315    Py_DECREF(arglist);                           // Trash arglist
00316    if (result) {                                 // If no errors, return double
00317       res = PyInt_AsLong(result);
00318    }
00319    Py_XDECREF(result);
00320    return res;
00321 }
00322 
00323 // Attach a new method to our plot widget for adding Python functions
00324 // Set a Python function object as a callback function
00325 // Note : PyObject *pyfunc is remapped with a typempap
00326 %}
00327 
00328 %addmethods SDLMessageObject {
00329    void set_pymethod(MSG_TYPE type, PyObject *pyfunc) {
00330       self->SetEventCallback(type, PythonCallBack, (void *) pyfunc);
00331       Py_INCREF(pyfunc);
00332    }
00333 }
00334 #endif
00335 
00336 #endif // SDLMESSAGEOBJECT_H