The SBJ MVC Framework - The Design View, Responding to Model Change

//------------------------------------------------------------------------------
// $Workfile: ModelDataTypes.cpp $
// $Header: /SbjDev/SbjCore/ModelDataTypes.cpp 2     11/12/08 2:22p Steve $
//
//	Copyright � 2008 SbjCat
// All rights reserved.
//
//
// *** Authors ***
//	 Steve Johnson
//
// $Revision: 2 $
//
//-----------------------------------------------------------------------------

#pragma once

#include "stdafx.h"
#include "ModelController.h"
#include "ModelTypeDefs.h"
#include "ModelEvents.h"
#include "DocEvents.h"
#include "UndoRedoMgr.h"
#include "UndoRedoHandler.h"

namespace localNS
{
	LPCTSTR lpszLeft(_T("left"));
	LPCTSTR lpszTop(_T("top"));
	LPCTSTR lpszRight(_T("right"));
	LPCTSTR lpszBottom(_T("bottom"));
}

namespace SbjCore
{
	namespace Mvc
	{
		namespace Model
		{
			namespace Rect
			{
				void SetItemValue(Controller* pModelCtrlr, const HANDLE hItem, const CRect& r, bool bAddToUndoRedo /*= false*/, bool bFireEvents /*= false*/)
				{
					CRect rAfter = r;
					CRect rBefore(0,0,0,0);
					if (bAddToUndoRedo)
					{
						rBefore = GetItemValue(pModelCtrlr, hItem);
					}
					
					

					pModelCtrlr->SetItemAttrValue(hItem, localNS::lpszLeft, r.left);
					pModelCtrlr->SetItemAttrValue(hItem, localNS::lpszTop, r.top);
					pModelCtrlr->SetItemAttrValue(hItem, localNS::lpszRight, r.right);
					pModelCtrlr->SetItemAttrValue(hItem, localNS::lpszBottom, r.bottom);

					if (bAddToUndoRedo)
					{
						class UndoRedoHandler : public SbjCore::UndoRedo::Handler
						{
							CString sActionName;
							Controller* pModelCtrlr;
							HANDLE hItem;
							CRect rBefore;
							CRect rAfter;
						public:
							UndoRedoHandler(Controller* p, const HANDLE h, const CRect& rB, const CRect& rA) :
							  sActionName(_T("Move")),
								  pModelCtrlr(p),
								  hItem(h),
								  rBefore(rB),
								  rAfter(rA)
							  {
								  if (rBefore.TopLeft() == rAfter.TopLeft())
								  {
									  if (rBefore.BottomRight() != rAfter.BottomRight())
									  {
										  sActionName = _T("Resize");
									  }
								  }
								  else if (rBefore.BottomRight() == rAfter.BottomRight())
								  {
									  sActionName = _T("Resize");
								  }
							  }

							  virtual bool OnHandleUndo()
							  {
								  bool bRslt = true;
								  SetItemValue(pModelCtrlr, hItem, rBefore, false, true);
								  return bRslt;
							  }

							  virtual bool OnHandleRedo()
							  {
								  bool bRslt = true;
								  SetItemValue(pModelCtrlr, hItem, rAfter, false, true);
								  return bRslt;
							  }

							  virtual LPCTSTR OnGetHandlerName() const
							  {
								  return sActionName;
							  }
						};
						UndoRedoHandler* pUndoRedo = new UndoRedoHandler(pModelCtrlr, hItem, rBefore, rAfter);
						pModelCtrlr->GetUndoRedoMgr()->Push(pUndoRedo);
					}

					if (bFireEvents)
					{
						SbjCore::Mvc::Model::Events::ItemChange eventItemChanged(SbjCore::Mvc::Model::Events::EVID_ITEM_CHANGED, pModelCtrlr, hItem, _T("Rectangle"));
						SbjCore::Mvc::Doc::Events::DocModified eventDocModified(true);
					}

				}

				CRect GetItemValue(Controller* pModelCtrlr, const HANDLE hItem)
				{
					CRect r(0,0,0,0);
					if (pModelCtrlr != NULL)
					{
						r.left = pModelCtrlr->GetItemAttrValue(hItem, localNS::lpszLeft);
						r.top = pModelCtrlr->GetItemAttrValue(hItem, localNS::lpszTop);
						r.right = pModelCtrlr->GetItemAttrValue(hItem, localNS::lpszRight);
						r.bottom = pModelCtrlr->GetItemAttrValue(hItem, localNS::lpszBottom);
					}
					return r;
				}
			}
		}
	}	
}

//*** Modification History ***
// $Log: /SbjDev/SbjCore/ModelDataTypes.cpp $
// 
// 2     11/12/08 2:22p Steve
// Finished Generalization of Model  v2.0.1
// 
// 1     11/02/08 12:48a Steve
// 
// 1     10/28/08 4:53p Steve
// 
// 3     10/28/08 11:13a Steve
// 
// 2     10/26/08 9:19a Steve
// 
// 1     10/24/08 9:03a Steve