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# View_Composite.h

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    00001 /*
    00002  * Copyright 2000 Murray Cumming
    00003  *
    00004  * This library is free software; you can redistribute it and/or
    00005  * modify it under the terms of the GNU Library General Public
    00006  * License as published by the Free Software Foundation; either
    00007  * version 2 of the License, or (at your option) any later version.
    00008  *
    00009  * This library is distributed in the hope that it will be useful,
    00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012  * Library General Public License for more details.
    00013  *
    00014  * You should have received a copy of the GNU Library General Public
    00015  * License along with this library; if not, write to the Free
    00016  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00017  */
    00018
    00019 #ifndef BAKERY_VIEW_COMPOSITE_H
    00020 #define BAKERY_VIEW_COMPOSITE_H
    00021
    00022 #include "bakery/View/View.h"
    00023 #include <vector>
    00024 #include <algorithm> //For std::find
    00025
    00026 namespace Bakery
    00027 {
    00028
    00032 template< class T_Document >
    00033 class View_Composite : public View<T_Document>
    00034 {
    00035 public:
    00036   View_Composite()
    00037   {
    00038   }
    00039
    00040   virtual ~View_Composite()
    00041   {
    00042   }
    00043
    00044   typedef View<T_Document> type_view;
    00045
    00046   virtual void add_view(type_view* pView)
    00047   {
    00048     //Ensure that the view has the same document:
    00049     //This should be unnecessary.
    00050     if(pView)
    00051     {
    00052       pView->set_document(View<T_Document>::get_document());
    00053
    00054       //Add it to the list of child views:
    00055       m_vecViews.push_back(pView);
    00056     }
    00057   }
    00058
    00059   virtual void remove_view(type_view* pView)
    00060   {
    00061     typename type_vecViews::iterator iter = std::find(m_vecViews.begin(), m_vecViews.end(), pView);
    00062     if(iter != m_vecViews.end())
    00063       m_vecViews.erase(iter);
    00064   }
    00065
    00066   virtual void set_document(T_Document* pDocument)
    00067   {
    00068     //Call base class:
    00069     View<T_Document>::set_document(pDocument);
    00070
    00071     //Change the document in the child views.
    00072     for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    00073     {
    00074       type_view* pView = *iter;
    00075       if(pView)
    00076         pView->set_document(pDocument);
    00077     }
    00078   }
    00079
    00080   virtual void load_from_document()
    00081   {
    00082     //Delegate to the child views:
    00083     for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    00084     {
    00085       type_view* pView = *iter;
    00086       if(pView)
    00087         pView->load_from_document();
    00088     }
    00089   }
    00090
    00091   virtual void save_to_document()
    00092   {
    00093     //Delegate to the child views:
    00094     for(typename type_vecViews::iterator iter = m_vecViews.begin(); iter != m_vecViews.end(); iter++)
    00095     {
    00096       type_view* pView = *iter;
    00097       if(pView)
    00098         pView->save_to_document();
    00099     }
    00100   }
    00101
    00102 protected:
    00103   typedef std::vector<type_view*> type_vecViews;
    00104   type_vecViews m_vecViews;
    00105 };
    00106
    00107 } //namespace
    00108
    00109 #endif