【转帖】question about acdbdatabasereactor
 

question about acdbdatabasereactor
question about acdbdatabasereactor
i want to build a databasereactor to check whether the opened file is modified.the program is as follow:
void initapplication()
{
// note: do not edit the following lines.
//{{afx_arx_init
addcommand("ww", "forreactor", "forreactor", acrx_cmd_transparent | acrx_cmd_usepickset, wwforreactor);
//}}afx_arx_init
// todo: add your initialization functions
afxmessagebox("0");
if (docvars.docdata(acdocmanager->curdocument()).m_pwwfirstreactor)
{
delete docvars.docdata(acdocmanager->curdocument()).m_pwwfirstreactor;
docvars.docdata(acdocmanager->curdocument()).m_pwwfirstreactor=null;
}
}
when i open the autocad software,and load the arx,the error message is as follow:
then i change the code in docdata.cpp as follow:i comment one line :
if (m_pwwfirstreactor) delete m_pwwfirstreactor;
cdocdata::~cdocdata()
{
// note: do not edit the following lines.
//{{afx_arx_data_del(cdocdata)
///if (m_pwwfirstreactor) delete m_pwwfirstreactor;
//}}afx_arx_data_del
// todo: clean up.
}
then i can load the arx normally,but just once.. that mean first time i open autocad and load the arx ,it operates normally,then i close the autocad.and then i open autocad again,and load the arx,then error message appears as follow:
i think it must be some error about single document and multiple docment,but i don抰 know how to solve the question, i add one line in the void unloadapplication() function ,i think maybe the reactor should be unload and delete when the application unloaded.but it doesn抰 work.
void unloadapplication()
{
// note: do not edit the following lines.
//{{afx_arx_exit
acedregcmds->removegroup("ww");
//}}afx_arx_exit
// todo: clean up your application
if (m_pwwfirstreactor) delete m_pwwfirstreactor;
}
can somebody help to me?
regards!
attached images
perhaps you'd better ask this queston on arx forum:
vladimir