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SCA_PropertyActuator.cpp

/**
 * Assign, change, copy properties
 *
 * $Id: SCA_PropertyActuator.cpp,v 1.6 2004/10/16 11:41:48 kester Exp $
 *
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

#include "SCA_PropertyActuator.h"
#include "InputParser.h"
#include "Operator2Expr.h"
#include "ConstExpr.h"

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* ------------------------------------------------------------------------- */
/* Native functions                                                          */
/* ------------------------------------------------------------------------- */

SCA_PropertyActuator::SCA_PropertyActuator(SCA_IObject* gameobj,CValue* sourceObj,const STR_String& propname,const STR_String& expr,int acttype,PyTypeObject* T )
   :  SCA_IActuator(gameobj,T),
      m_type(acttype),
      m_propname(propname),
      m_exprtxt(expr),
      m_sourceObj(sourceObj)
{
}

SCA_PropertyActuator::~SCA_PropertyActuator()
{
}

bool SCA_PropertyActuator::Update()
{
      bool result = false;

      bool bNegativeEvent = IsNegativeEvent();
      RemoveAllEvents();


      if (bNegativeEvent)
            return false; // do nothing on negative events


      CValue* propowner = GetParent();
      CParser parser;
      parser.SetContext( propowner->AddRef());
      
      CExpression* userexpr = parser.ProcessText(m_exprtxt);
      if (userexpr)
      {
            

            switch (m_type)
            {

            case KX_ACT_PROP_ASSIGN:
                  {
                        
                        CValue* newval = userexpr->Calculate();
                        CValue* oldprop = propowner->GetProperty(m_propname);
                        if (oldprop)
                        {
                              oldprop->SetValue(newval);
                              newval->Release();
                        } else
                        {
                              propowner->SetProperty(m_propname,newval);
                        }

                        break;
                  }
            case KX_ACT_PROP_ADD:
                  {
                        CValue* oldprop = propowner->GetProperty(m_propname);
                        if (oldprop)
                        {
                              int waarde = (int)oldprop->GetNumber();
                              CExpression* expr = new COperator2Expr(VALUE_ADD_OPERATOR,new CConstExpr(oldprop->AddRef()),
                                                                                          userexpr->AddRef());

                              CValue* newprop = expr->Calculate();
                              oldprop->SetValue(newprop);
                              newprop->Release();
                              expr->Release();

                        }

                        break;
                  }
            case KX_ACT_PROP_COPY:
                  {
                        if (m_sourceObj)
                        {
                              CValue* copyprop = m_sourceObj->GetProperty(m_exprtxt);
                              if (copyprop)
                              {
                                    GetParent()->SetProperty(
                                           m_propname,
                                          copyprop->GetReplica());

                              }
                        }
                        break;
                  }
            default:
                  {

                  }
            }

            userexpr->Release();
      }
      
      return result;
}

      bool 

SCA_PropertyActuator::

isValid(

      SCA_PropertyActuator::KX_ACT_PROP_MODE mode

){
      bool res = false; 
      res = ((mode > KX_ACT_PROP_NODEF) && (mode < KX_ACT_PROP_MAX));
      return res;
}


      CValue* 

SCA_PropertyActuator::

GetReplica() {

      SCA_PropertyActuator* replica = new SCA_PropertyActuator(*this);

      replica->ProcessReplica();

      // this will copy properties and so on...

      CValue::AddDataToReplica(replica);

      return replica;

};




/* ------------------------------------------------------------------------- */
/* Python functions                                                          */
/* ------------------------------------------------------------------------- */

/* Integration hooks ------------------------------------------------------- */
PyTypeObject SCA_PropertyActuator::Type = {
      PyObject_HEAD_INIT(&PyType_Type)
      0,
      "SCA_PropertyActuator",
      sizeof(SCA_PropertyActuator),
      0,
      PyDestructor,
      0,
      __getattr,
      __setattr,
      0, //&MyPyCompare,
      __repr,
      0, //&cvalue_as_number,
      0,
      0,
      0,
      0
};

PyParentObject SCA_PropertyActuator::Parents[] = {
      &SCA_PropertyActuator::Type,
      &SCA_IActuator::Type,
      &SCA_ILogicBrick::Type,
      &CValue::Type,
      NULL
};

PyMethodDef SCA_PropertyActuator::Methods[] = {
      {"setProperty", (PyCFunction) SCA_PropertyActuator::sPySetProperty, METH_VARARGS, SetProperty_doc},
      {"getProperty", (PyCFunction) SCA_PropertyActuator::sPyGetProperty, METH_VARARGS, GetProperty_doc},
      {"setValue", (PyCFunction) SCA_PropertyActuator::sPySetValue, METH_VARARGS, SetValue_doc},
      {"getValue", (PyCFunction) SCA_PropertyActuator::sPyGetValue, METH_VARARGS, GetValue_doc},
      {NULL,NULL} //Sentinel
};

PyObject* SCA_PropertyActuator::_getattr(const STR_String& attr) {
      _getattr_up(SCA_IActuator);
}

/* 1. setProperty                                                        */
char SCA_PropertyActuator::SetProperty_doc[] = 
"setProperty(name)\n"
"\t- name: string\n"
"\tSet the property on which to operate. If there is no property\n"
"\tof this name, the call is ignored.\n";
PyObject* SCA_PropertyActuator::PySetProperty(PyObject* self, PyObject* args, PyObject* kwds)
{
      /* Check whether the name exists first ! */
      char *nameArg;
      if (!PyArg_ParseTuple(args, "s", &nameArg)) {
            return NULL;
      }

      CValue* prop = GetParent()->FindIdentifier(nameArg);

      if (prop) {
            m_propname = nameArg;
      } else {
            ; /* not found ... */
      }
      
      Py_Return;
}

/* 2. getProperty                                                        */
char SCA_PropertyActuator::GetProperty_doc[] = 
"getProperty(name)\n"
"\tReturn the property on which the actuator operates.\n";
PyObject* SCA_PropertyActuator::PyGetProperty(PyObject* self, PyObject* args, PyObject* kwds)
{
      return PyString_FromString(m_propname);
}

/* 3. setValue                                                        */
char SCA_PropertyActuator::SetValue_doc[] = 
"setValue(value)\n"
"\t- value: string\n"
"\tSet the value with which the actuator operates. If the value\n"
"\tis not compatible with the type of the property, the subsequent\n"
"\t action is ignored.\n";
PyObject* SCA_PropertyActuator::PySetValue(PyObject* self, PyObject* args, PyObject* kwds)
{
      char *valArg;
      if(!PyArg_ParseTuple(args, "s", &valArg)) {
            return NULL;            
      }
      
      if (valArg) m_exprtxt = valArg;

      Py_Return;
}

/* 4. getValue                                                        */
char SCA_PropertyActuator::GetValue_doc[] = 
"getValue()\n"
"\tReturns the value with which the actuator operates.\n";
PyObject* SCA_PropertyActuator::PyGetValue(PyObject* self, PyObject* args, PyObject* kwds)
{
      return PyString_FromString(m_exprtxt);
}

/* eof */

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