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273
wxWidgets/include/wx/clntdata.h
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273
wxWidgets/include/wx/clntdata.h
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/clntdata.h
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// Purpose: A mixin class for holding a wxClientData or void pointer
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// Author: Robin Dunn
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// Modified by:
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// Created: 9-Oct-2001
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// RCS-ID: $Id: clntdata.h 36973 2006-01-18 16:45:41Z JS $
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_CLNTDATAH__
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#define _WX_CLNTDATAH__
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#include "wx/defs.h"
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#include "wx/string.h"
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#include "wx/hashmap.h"
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typedef int (*wxShadowObjectMethod)(void*, void*);
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WX_DECLARE_STRING_HASH_MAP_WITH_DECL(
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wxShadowObjectMethod,
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wxShadowObjectMethods,
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class WXDLLIMPEXP_BASE
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);
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WX_DECLARE_STRING_HASH_MAP_WITH_DECL(
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void *,
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wxShadowObjectFields,
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class WXDLLIMPEXP_BASE
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);
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class WXDLLIMPEXP_BASE wxShadowObject
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{
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public:
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wxShadowObject() { }
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void AddMethod( const wxString &name, wxShadowObjectMethod method )
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{
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wxShadowObjectMethods::iterator it = m_methods.find( name );
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if (it == m_methods.end())
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m_methods[ name ] = method;
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else
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it->second = method;
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}
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bool InvokeMethod( const wxString &name, void* window, void* param, int* returnValue )
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{
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wxShadowObjectMethods::iterator it = m_methods.find( name );
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if (it == m_methods.end())
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return false;
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wxShadowObjectMethod method = it->second;
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int ret = (*method)(window, param);
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if (returnValue)
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*returnValue = ret;
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return true;
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}
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void AddField( const wxString &name, void* initialValue = NULL )
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{
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wxShadowObjectFields::iterator it = m_fields.find( name );
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if (it == m_fields.end())
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m_fields[ name ] = initialValue;
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else
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it->second = initialValue;
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}
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void SetField( const wxString &name, void* value )
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{
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wxShadowObjectFields::iterator it = m_fields.find( name );
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if (it == m_fields.end())
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return;
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it->second = value;
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}
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void* GetField( const wxString &name, void *defaultValue = NULL )
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{
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wxShadowObjectFields::iterator it = m_fields.find( name );
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if (it == m_fields.end())
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return defaultValue;
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return it->second;
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}
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private:
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wxShadowObjectMethods m_methods;
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wxShadowObjectFields m_fields;
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};
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// ----------------------------------------------------------------------------
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// what kind of client data do we have?
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enum wxClientDataType
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{
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wxClientData_None, // we don't know yet because we don't have it at all
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wxClientData_Object, // our client data is typed and we own it
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wxClientData_Void // client data is untyped and we don't own it
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};
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class WXDLLIMPEXP_BASE wxClientData
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{
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public:
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wxClientData() { }
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virtual ~wxClientData() { }
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};
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class WXDLLIMPEXP_BASE wxStringClientData : public wxClientData
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{
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public:
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wxStringClientData() : m_data() { }
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wxStringClientData( const wxString &data ) : m_data(data) { }
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void SetData( const wxString &data ) { m_data = data; }
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const wxString& GetData() const { return m_data; }
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private:
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wxString m_data;
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};
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// This class is a mixin that provides storage and management of "client
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// data." The client data stored can either be a pointer to a wxClientData
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// object in which case it is managed by the container (i.e. it will delete
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// the data when it's destroyed) or an untyped pointer which won't be deleted
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// by the container - but not both of them
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//
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// NOTE: This functionality is currently duplicated in wxEvtHandler in order
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// to avoid having more than one vtable in that class hierarchy.
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class WXDLLIMPEXP_BASE wxClientDataContainer
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{
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public:
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wxClientDataContainer();
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virtual ~wxClientDataContainer();
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void SetClientObject( wxClientData *data ) { DoSetClientObject(data); }
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wxClientData *GetClientObject() const { return DoGetClientObject(); }
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void SetClientData( void *data ) { DoSetClientData(data); }
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void *GetClientData() const { return DoGetClientData(); }
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protected:
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// The user data: either an object which will be deleted by the container
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// when it's deleted or some raw pointer which we do nothing with. Only
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// one type of data can be used with the given window, i.e. you cannot set
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// the void data and then associate the container with wxClientData or vice
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// versa.
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union
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{
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wxClientData *m_clientObject;
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void *m_clientData;
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};
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// client data accessors
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virtual void DoSetClientObject( wxClientData *data );
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virtual wxClientData *DoGetClientObject() const;
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virtual void DoSetClientData( void *data );
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virtual void *DoGetClientData() const;
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// what kind of data do we have?
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wxClientDataType m_clientDataType;
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};
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#include "wx/vector.h"
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struct WXDLLIMPEXP_BASE wxClientDataDictionaryPair
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{
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wxClientDataDictionaryPair( size_t idx ) : index( idx ), data( 0 ) { }
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size_t index;
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wxClientData* data;
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};
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_WX_DECLARE_VECTOR(
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wxClientDataDictionaryPair,
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wxClientDataDictionaryPairVector,
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WXDLLIMPEXP_BASE
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);
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// this class is used internally to maintain the association between items
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// of (some subclasses of) wxControlWithItems and their client data
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// NOTE: this class does not keep track of whether it contains
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// wxClientData or void*. The client must ensure that
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// it does not contain a mix of the two, and that
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// DestroyData is called if it contains wxClientData
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class WXDLLIMPEXP_BASE wxClientDataDictionary
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{
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public:
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wxClientDataDictionary() {}
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// deletes all the data
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void DestroyData()
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{
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for( size_t i = 0, end = m_vec.size(); i != end; ++i )
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delete m_vec[i].data;
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m_vec.clear();
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}
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// if data for the given index is not present, add it,
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// if it is present, delete the old data and replace it with
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// the new one
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void Set( size_t index, wxClientData* data, bool doDelete )
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{
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size_t ptr = Find( index );
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if( !data )
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{
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if( ptr == m_vec.size() ) return;
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if( doDelete )
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delete m_vec[ptr].data;
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m_vec.erase( ptr );
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}
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else
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{
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if( ptr == m_vec.size() )
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{
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m_vec.push_back( wxClientDataDictionaryPair( index ) );
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ptr = m_vec.size() - 1;
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}
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if( doDelete )
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delete m_vec[ptr].data;
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m_vec[ptr].data = data;
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}
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}
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// get the data associated with the given index,
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// return 0 if not found
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wxClientData* Get( size_t index ) const
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{
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size_t it = Find( index );
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if( it == m_vec.size() ) return 0;
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return (wxClientData*)m_vec[it].data; // const cast
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}
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// delete the data associated with the given index
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// it also decreases by one the indices of all the elements
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// with an index greater than the given index
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void Delete( size_t index, bool doDelete )
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{
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size_t todel = m_vec.size();
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for( size_t i = 0, end = m_vec.size(); i != end; ++i )
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{
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if( m_vec[i].index == index )
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todel = i;
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else if( m_vec[i].index > index )
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--(m_vec[i].index);
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}
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if( todel != m_vec.size() )
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{
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if( doDelete )
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delete m_vec[todel].data;
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m_vec.erase( todel );
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}
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}
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private:
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// returns MyVec.size() if not found
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size_t Find( size_t index ) const
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{
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for( size_t i = 0, end = m_vec.size(); i != end; ++i )
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{
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if( m_vec[i].index == index )
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return i;
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}
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return m_vec.size();
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}
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wxClientDataDictionaryPairVector m_vec;
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};
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#endif // _WX_CLNTDATAH__
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