539 lines
19 KiB
C++
539 lines
19 KiB
C++
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/////////////////////////////////////////////////////////////////////////////
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// Name: src/common/xtixml.cpp
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// Purpose: streaming runtime metadata information
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// Author: Stefan Csomor
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// Modified by:
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// Created: 27/07/03
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// RCS-ID: $Id: xtixml.cpp 38939 2006-04-27 12:47:14Z ABX $
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// Copyright: (c) 2003 Stefan Csomor
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_EXTENDED_RTTI
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#include "wx/xtixml.h"
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#ifndef WX_PRECOMP
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#include "wx/object.h"
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#include "wx/hash.h"
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#include "wx/event.h"
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#endif
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#include "wx/xml/xml.h"
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#include "wx/tokenzr.h"
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#include "wx/txtstrm.h"
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#include "wx/xtistrm.h"
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#include "wx/beforestd.h"
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#include <map>
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#include <vector>
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#include <string>
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#include "wx/afterstd.h"
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using namespace std ;
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//
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// XML Streaming
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//
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// convenience functions
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void wxXmlAddContentToNode( wxXmlNode* node , const wxString& data )
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{
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node->AddChild(new wxXmlNode(wxXML_TEXT_NODE, wxT("value"), data ) );
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}
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wxString wxXmlGetContentFromNode( wxXmlNode *node )
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{
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if ( node->GetChildren() )
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return node->GetChildren()->GetContent() ;
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else
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return wxEmptyString ;
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}
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struct wxXmlWriter::wxXmlWriterInternal
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{
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wxXmlNode *m_root ;
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wxXmlNode *m_current ;
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vector< wxXmlNode * > m_objectStack ;
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void Push( wxXmlNode *newCurrent )
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{
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m_objectStack.push_back( m_current ) ;
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m_current = newCurrent ;
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}
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void Pop()
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{
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m_current = m_objectStack.back() ;
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m_objectStack.pop_back() ;
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}
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} ;
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wxXmlWriter::wxXmlWriter( wxXmlNode * rootnode )
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{
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m_data = new wxXmlWriterInternal() ;
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m_data->m_root = rootnode ;
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m_data->m_current = rootnode ;
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}
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wxXmlWriter::~wxXmlWriter()
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{
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delete m_data ;
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}
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void wxXmlWriter::DoBeginWriteTopLevelEntry( const wxString &name )
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("entry"));
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pnode->AddProperty(wxString(wxT("name")), name);
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m_data->m_current->AddChild(pnode) ;
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m_data->Push( pnode ) ;
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}
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void wxXmlWriter::DoEndWriteTopLevelEntry( const wxString &WXUNUSED(name) )
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{
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m_data->Pop() ;
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}
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void wxXmlWriter::DoBeginWriteObject(const wxObject *WXUNUSED(object), const wxClassInfo *classInfo, int objectID , wxxVariantArray &metadata )
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("object"));
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pnode->AddProperty(wxT("class"), wxString(classInfo->GetClassName()));
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pnode->AddProperty(wxT("id"), wxString::Format( wxT("%d") , objectID ) );
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for ( size_t i = 0 ; i < metadata.GetCount() ; ++i )
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{
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pnode->AddProperty( metadata[i].GetName() , metadata[i].GetAsString() ) ;
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}
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m_data->m_current->AddChild(pnode) ;
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m_data->Push( pnode ) ;
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}
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// end of writing the root object
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void wxXmlWriter::DoEndWriteObject(const wxObject *WXUNUSED(object), const wxClassInfo *WXUNUSED(classInfo), int WXUNUSED(objectID) )
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{
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m_data->Pop() ;
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}
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// writes a property in the stream format
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void wxXmlWriter::DoWriteSimpleType( wxxVariant &value )
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{
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wxXmlAddContentToNode( m_data->m_current ,value.GetAsString() ) ;
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}
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void wxXmlWriter::DoBeginWriteElement()
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("element") );
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m_data->m_current->AddChild(pnode) ;
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m_data->Push( pnode ) ;
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}
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void wxXmlWriter::DoEndWriteElement()
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{
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m_data->Pop() ;
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}
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void wxXmlWriter::DoBeginWriteProperty(const wxPropertyInfo *pi )
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("prop") );
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pnode->AddProperty(wxT("name"), pi->GetName() );
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m_data->m_current->AddChild(pnode) ;
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m_data->Push( pnode ) ;
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}
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void wxXmlWriter::DoEndWriteProperty(const wxPropertyInfo *WXUNUSED(propInfo) )
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{
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m_data->Pop() ;
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}
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// insert an object reference to an already written object
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void wxXmlWriter::DoWriteRepeatedObject( int objectID )
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("object"));
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pnode->AddProperty(wxString(wxT("href")), wxString::Format( wxT("%d") , objectID ) );
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m_data->m_current->AddChild(pnode) ;
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}
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// insert a null reference
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void wxXmlWriter::DoWriteNullObject()
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{
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wxXmlNode *pnode;
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pnode = new wxXmlNode(wxXML_ELEMENT_NODE, wxT("object"));
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m_data->m_current->AddChild(pnode) ;
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}
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// writes a delegate in the stream format
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void wxXmlWriter::DoWriteDelegate( const wxObject *WXUNUSED(object), const wxClassInfo* WXUNUSED(classInfo) , const wxPropertyInfo *WXUNUSED(pi) ,
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const wxObject *eventSink, int sinkObjectID , const wxClassInfo* WXUNUSED(eventSinkClassInfo) , const wxHandlerInfo* handlerInfo )
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{
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if ( eventSink != NULL && handlerInfo != NULL )
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{
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wxXmlAddContentToNode( m_data->m_current ,wxString::Format(wxT("%d.%s"), sinkObjectID , handlerInfo->GetName().c_str()) ) ;
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}
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}
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// ----------------------------------------------------------------------------
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// reading objects in
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// reading xml in
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// ----------------------------------------------------------------------------
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/*
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Reading components has not to be extended for components
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as properties are always sought by typeinfo over all levels
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and create params are always toplevel class only
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*/
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int wxXmlReader::ReadComponent(wxXmlNode *node, wxDepersister *callbacks)
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{
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wxASSERT_MSG( callbacks , wxT("Does not support reading without a Depersistor") ) ;
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wxString className;
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wxClassInfo *classInfo;
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wxxVariant *createParams ;
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int *createParamOids ;
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const wxClassInfo** createClassInfos ;
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wxXmlNode *children;
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int objectID;
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wxString ObjectIdString ;
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children = node->GetChildren();
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if (!children)
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{
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// check for a null object or href
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if (node->GetPropVal(wxT("href") , &ObjectIdString ) )
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{
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objectID = atoi( ObjectIdString.ToAscii() ) ;
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if ( HasObjectClassInfo( objectID ) )
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{
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return objectID ;
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}
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else
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{
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wxLogError( _("Forward hrefs are not supported") ) ;
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return wxInvalidObjectID ;
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}
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}
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if ( !node->GetPropVal(wxT("id") , &ObjectIdString ) )
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{
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return wxNullObjectID;
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}
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}
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if (!node->GetPropVal(wxT("class"), &className))
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{
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// No class name. Eek. FIXME: error handling
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return wxInvalidObjectID;
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}
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classInfo = wxClassInfo::FindClass(className);
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if ( classInfo == NULL )
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{
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wxLogError( wxString::Format(_("unknown class %s"),className ) ) ;
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return wxInvalidObjectID ;
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}
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if ( children != NULL && children->GetType() == wxXML_TEXT_NODE )
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{
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wxLogError(_("objects cannot have XML Text Nodes") ) ;
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return wxInvalidObjectID;
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}
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if (!node->GetPropVal(wxT("id"), &ObjectIdString))
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{
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wxLogError(_("Objects must have an id attribute") ) ;
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// No object id. Eek. FIXME: error handling
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return wxInvalidObjectID;
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}
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objectID = atoi( ObjectIdString.ToAscii() ) ;
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// is this object already has been streamed in, return it here
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if ( HasObjectClassInfo( objectID ) )
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{
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wxLogError ( wxString::Format(_("Doubly used id : %d"), objectID ) ) ;
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return wxInvalidObjectID ;
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}
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// new object, start with allocation
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// first make the object know to our internal registry
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SetObjectClassInfo( objectID , classInfo ) ;
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wxxVariantArray metadata ;
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wxXmlProperty *xp = node->GetProperties() ;
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while ( xp )
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{
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if ( xp->GetName() != wxString(wxT("class")) && xp->GetName() != wxString(wxT("id")) )
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{
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metadata.Add( new wxxVariant( xp->GetValue() , xp->GetName() ) ) ;
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}
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xp = xp->GetNext() ;
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}
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if ( !classInfo->NeedsDirectConstruction() )
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callbacks->AllocateObject(objectID, classInfo, metadata);
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//
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// stream back the Create parameters first
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createParams = new wxxVariant[ classInfo->GetCreateParamCount() ] ;
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createParamOids = new int[classInfo->GetCreateParamCount() ] ;
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createClassInfos = new const wxClassInfo*[classInfo->GetCreateParamCount() ] ;
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#if wxUSE_UNICODE
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typedef map<wstring, wxXmlNode *> PropertyNodes ;
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typedef vector<wstring> PropertyNames ;
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#else
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typedef map<string, wxXmlNode *> PropertyNodes ;
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typedef vector<string> PropertyNames ;
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#endif
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PropertyNodes propertyNodes ;
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PropertyNames propertyNames ;
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while( children )
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{
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wxString name ;
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children->GetPropVal( wxT("name") , &name ) ;
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propertyNames.push_back( name.c_str() ) ;
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propertyNodes[name.c_str()] = children->GetChildren() ;
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children = children->GetNext() ;
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}
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for ( int i = 0 ; i <classInfo->GetCreateParamCount() ; ++i )
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{
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const wxChar* paramName = classInfo->GetCreateParamName(i) ;
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PropertyNodes::iterator propiter = propertyNodes.find( paramName ) ;
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const wxPropertyInfo* pi = classInfo->FindPropertyInfo( paramName ) ;
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if ( pi == 0 )
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{
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wxLogError( wxString::Format(_("Unkown Property %s"),paramName) ) ;
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}
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// if we don't have the value of a create param set in the xml
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// we use the default value
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if ( propiter != propertyNodes.end() )
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{
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wxXmlNode* prop = propiter->second ;
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if ( pi->GetTypeInfo()->IsObjectType() )
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{
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createParamOids[i] = ReadComponent( prop , callbacks ) ;
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createClassInfos[i] = dynamic_cast<const wxClassTypeInfo*>(pi->GetTypeInfo())->GetClassInfo() ;
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}
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else
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{
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createParamOids[i] = wxInvalidObjectID ;
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createParams[i] = ReadValue( prop , pi->GetTypeInfo() ) ;
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if( pi->GetFlags() & wxPROP_ENUM_STORE_LONG )
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{
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const wxEnumTypeInfo *eti = dynamic_cast<const wxEnumTypeInfo*>( pi->GetTypeInfo() ) ;
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if ( eti )
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{
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long realval ;
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eti->ConvertToLong( createParams[i] , realval ) ;
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createParams[i] = wxxVariant( realval ) ;
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}
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else
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{
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wxLogError( _("Type must have enum - long conversion") ) ;
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}
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}
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createClassInfos[i] = NULL ;
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}
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for ( size_t j = 0 ; j < propertyNames.size() ; ++j )
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{
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if ( propertyNames[j] == paramName )
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{
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propertyNames[j] = wxEmptyString ;
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break ;
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}
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}
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}
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else
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{
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if ( pi->GetTypeInfo()->IsObjectType() )
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{
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createParamOids[i] = wxNullObjectID ;
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createClassInfos[i] = dynamic_cast<const wxClassTypeInfo*>(pi->GetTypeInfo())->GetClassInfo() ;
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}
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else
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{
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createParams[i] = pi->GetDefaultValue() ;
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createParamOids[i] = wxInvalidObjectID ;
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}
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}
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}
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// got the parameters. Call the Create method
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if ( classInfo->NeedsDirectConstruction() )
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callbacks->ConstructObject(objectID, classInfo,
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classInfo->GetCreateParamCount(),
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createParams, createParamOids, createClassInfos, metadata );
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||
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|
else
|
||
|
|
callbacks->CreateObject(objectID, classInfo,
|
||
|
|
classInfo->GetCreateParamCount(),
|
||
|
|
createParams, createParamOids, createClassInfos, metadata );
|
||
|
|
|
||
|
|
// now stream in the rest of the properties, in the sequence their properties were written in the xml
|
||
|
|
for ( size_t j = 0 ; j < propertyNames.size() ; ++j )
|
||
|
|
{
|
||
|
|
if ( propertyNames[j].length() )
|
||
|
|
{
|
||
|
|
PropertyNodes::iterator propiter = propertyNodes.find( propertyNames[j] ) ;
|
||
|
|
if ( propiter != propertyNodes.end() )
|
||
|
|
{
|
||
|
|
wxXmlNode* prop = propiter->second ;
|
||
|
|
const wxPropertyInfo* pi = classInfo->FindPropertyInfo( propertyNames[j].c_str() ) ;
|
||
|
|
if ( pi->GetTypeInfo()->GetKind() == wxT_COLLECTION )
|
||
|
|
{
|
||
|
|
const wxCollectionTypeInfo* collType = dynamic_cast< const wxCollectionTypeInfo* >( pi->GetTypeInfo() ) ;
|
||
|
|
const wxTypeInfo * elementType = collType->GetElementType() ;
|
||
|
|
while( prop )
|
||
|
|
{
|
||
|
|
if ( prop->GetName() != wxT("element") )
|
||
|
|
{
|
||
|
|
wxLogError( _("A non empty collection must consist of 'element' nodes" ) ) ;
|
||
|
|
break ;
|
||
|
|
}
|
||
|
|
wxXmlNode* elementContent = prop->GetChildren() ;
|
||
|
|
if ( elementContent )
|
||
|
|
{
|
||
|
|
// we skip empty elements
|
||
|
|
if ( elementType->IsObjectType() )
|
||
|
|
{
|
||
|
|
int valueId = ReadComponent( elementContent , callbacks ) ;
|
||
|
|
if ( valueId != wxInvalidObjectID )
|
||
|
|
{
|
||
|
|
if ( pi->GetAccessor()->HasAdder() )
|
||
|
|
callbacks->AddToPropertyCollectionAsObject( objectID , classInfo , pi , valueId ) ;
|
||
|
|
// TODO for collections we must have a notation on taking over ownership or not
|
||
|
|
if ( elementType->GetKind() == wxT_OBJECT && valueId != wxNullObjectID )
|
||
|
|
callbacks->DestroyObject( valueId , GetObjectClassInfo( valueId ) ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
wxxVariant elementValue = ReadValue( elementContent , elementType ) ;
|
||
|
|
if ( pi->GetAccessor()->HasAdder() )
|
||
|
|
callbacks->AddToPropertyCollection( objectID , classInfo ,pi , elementValue ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
prop = prop->GetNext() ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if ( pi->GetTypeInfo()->IsObjectType() )
|
||
|
|
{
|
||
|
|
// and object can either be streamed out a string or as an object
|
||
|
|
// in case we have no node, then the object's streaming out has been vetoed
|
||
|
|
if ( prop )
|
||
|
|
{
|
||
|
|
if ( prop->GetName() == wxT("object") )
|
||
|
|
{
|
||
|
|
int valueId = ReadComponent( prop , callbacks ) ;
|
||
|
|
if ( valueId != wxInvalidObjectID )
|
||
|
|
{
|
||
|
|
callbacks->SetPropertyAsObject( objectID , classInfo , pi , valueId ) ;
|
||
|
|
if ( pi->GetTypeInfo()->GetKind() == wxT_OBJECT && valueId != wxNullObjectID )
|
||
|
|
callbacks->DestroyObject( valueId , GetObjectClassInfo( valueId ) ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
wxASSERT( pi->GetTypeInfo()->HasStringConverters() ) ;
|
||
|
|
wxxVariant nodeval = ReadValue( prop , pi->GetTypeInfo() ) ;
|
||
|
|
callbacks->SetProperty( objectID, classInfo ,pi , nodeval ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if ( pi->GetTypeInfo()->IsDelegateType() )
|
||
|
|
{
|
||
|
|
if ( prop )
|
||
|
|
{
|
||
|
|
wxString resstring = prop->GetContent() ;
|
||
|
|
wxInt32 pos = resstring.Find('.') ;
|
||
|
|
if ( pos != wxNOT_FOUND )
|
||
|
|
{
|
||
|
|
int sinkOid = atol(resstring.Left(pos).ToAscii()) ;
|
||
|
|
wxString handlerName = resstring.Mid(pos+1) ;
|
||
|
|
wxClassInfo* sinkClassInfo = GetObjectClassInfo( sinkOid ) ;
|
||
|
|
|
||
|
|
callbacks->SetConnect( objectID , classInfo , pi , sinkClassInfo ,
|
||
|
|
sinkClassInfo->FindHandlerInfo(handlerName) , sinkOid ) ;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
wxLogError( _("incorrect event handler string, missing dot") ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
wxxVariant nodeval = ReadValue( prop , pi->GetTypeInfo() ) ;
|
||
|
|
if( pi->GetFlags() & wxPROP_ENUM_STORE_LONG )
|
||
|
|
{
|
||
|
|
const wxEnumTypeInfo *eti = dynamic_cast<const wxEnumTypeInfo*>( pi->GetTypeInfo() ) ;
|
||
|
|
if ( eti )
|
||
|
|
{
|
||
|
|
long realval ;
|
||
|
|
eti->ConvertToLong( nodeval , realval ) ;
|
||
|
|
nodeval = wxxVariant( realval ) ;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
wxLogError( _("Type must have enum - long conversion") ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
callbacks->SetProperty( objectID, classInfo ,pi , nodeval ) ;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
delete[] createParams ;
|
||
|
|
delete[] createParamOids ;
|
||
|
|
delete[] createClassInfos ;
|
||
|
|
|
||
|
|
return objectID;
|
||
|
|
}
|
||
|
|
|
||
|
|
wxxVariant wxXmlReader::ReadValue(wxXmlNode *node,
|
||
|
|
const wxTypeInfo *type )
|
||
|
|
{
|
||
|
|
wxString content ;
|
||
|
|
if ( node )
|
||
|
|
content = node->GetContent() ;
|
||
|
|
wxxVariant result ;
|
||
|
|
type->ConvertFromString( content , result ) ;
|
||
|
|
return result ;
|
||
|
|
}
|
||
|
|
|
||
|
|
int wxXmlReader::ReadObject( const wxString &name , wxDepersister *callbacks)
|
||
|
|
{
|
||
|
|
wxXmlNode *iter = m_parent->GetChildren() ;
|
||
|
|
while ( iter )
|
||
|
|
{
|
||
|
|
wxString entryName ;
|
||
|
|
if ( iter->GetPropVal(wxT("name"), &entryName) )
|
||
|
|
{
|
||
|
|
if ( entryName == name )
|
||
|
|
return ReadComponent( iter->GetChildren() , callbacks ) ;
|
||
|
|
}
|
||
|
|
iter = iter->GetNext() ;
|
||
|
|
}
|
||
|
|
return wxInvalidObjectID ;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // wxUSE_EXTENDED_RTTI
|