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

, 19 Mar 2009
A Model-View-Controller Framework that integrates with the MFC Doc/View architecture.
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//------------------------------------------------------------------------- -----
// $Workfile: DesignViewController.cpp $
// $Header: /SbjDev/SbjCore/DesignViewController.cpp 10    11/12/08 2:22p Steve $
//
//	Copyright � 2008 SbjCat
// All rights reserved.
//
//
// *** Authors ***
//	 Steve Johnson
//
// $Revision: 10 $
//
//-----------------------------------------------------------------------------

#include "StdAfx.h"
#include "Resource.h"
#include "DesignViewController.h"
#include "DesignViewItem.h"
#include "DesignViewDrawAction.h"
#include "DesignViewDrawActionHandler.h"
#include "DesignViewInsertActionHandler.h"

#include "ModelController.h"
#include "DocEvents.h"
#include "ModelEvents.h"

#include "WndMsgHandler.h"

#include "GDIUtils.h"

#include "RectTracker.h"
#include "MultiRectTracker.h"
#include "MultiRectTrackerEvents.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

namespace localNS
{
	// Event Handlers ////////////////////////////////////////////////////////

	class FileOpenEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		FileOpenEventHandler() :
		  SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Doc::Events::EVID_FILE_OPEN),
			  pTheCtrlr(NULL)
		  {
		  }

		  virtual ~FileOpenEventHandler()
		  {
		  }

		  void Init(SbjCore::Mvc::DesignView::Controller* p)
		  {
			  pTheCtrlr = p;
		  }

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			if (pTheCtrlr != NULL)
			{
				SbjCore::Mvc::Doc::Events::FileOpen* pTheEvent = dynamic_cast<SbjCore::Mvc::Doc::Events::FileOpen*>(pEvent);
				const SbjCore::Mvc::Model::Controller* pModelCtrlr = pTheEvent->pCtrlr;
				pTheCtrlr->LoadDesign(pModelCtrlr, pTheEvent->hItemRoot);
			}
		}
	};

	/////////////////////////////////////////////////////////////////////////
	
	class FileNewEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		FileNewEventHandler() :
			SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Doc::Events::EVID_FILE_NEW),
			pTheCtrlr(NULL)
		{
		}

		void Init(SbjCore::Mvc::DesignView::Controller* p)
		{
			pTheCtrlr = p;
		}

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			if (pTheCtrlr != NULL)
			{
				pTheCtrlr->DeleteAllItems();
			}
		}
	};

	/////////////////////////////////////////////////////////////////////////

	class DocModifiedEventHandler : public SbjCore::EventMgr::EventHandler
	{
		CView* pView;
	public:
		DocModifiedEventHandler() :
			SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Doc::Events::EVID_DOC_MODIFIED),
			pView(NULL)
		{
		}

		void SetView(CView* p)
		{
			pView = p;
		}

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			SbjCore::EventMgr::Event* pTheEvent = dynamic_cast<SbjCore::EventMgr::Event*>(pEvent);
			ASSERT(pTheEvent != NULL);
			if (pTheEvent != NULL)
			{
				pView->Invalidate();
			}
		}
	};
	
	/////////////////////////////////////////////////////////////////////////

	class ItemRemoveEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		ItemRemoveEventHandler() :
			SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Model::Events::EVID_ITEM_REMOVED)
		{
		}
		  
		void SetCtrlr(SbjCore::Mvc::DesignView::Controller* pCtrlr)
		{
			pTheCtrlr = pCtrlr;
		}

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			SbjCore::Mvc::Model::Events::ItemRemove* pTheEvent = dynamic_cast<SbjCore::Mvc::Model::Events::ItemRemove*>(pEvent);
			ASSERT(pTheEvent != NULL);
			if (pTheEvent != NULL)
			{
				SbjCore::Mvc::DesignView::Item* pItem = pTheCtrlr->GetItem(pTheEvent->hItem);
				if (pItem != NULL)
				{
					pTheCtrlr->DeleteItem(pItem);
				}
				((CView*)pTheCtrlr->GetWnd())->Invalidate();
			}
		}
	};
	
	class ItemInsertEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		ItemInsertEventHandler() :
		  SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Model::Events::EVID_ITEM_INSERTED),
			  pTheCtrlr(NULL)
		  {
		  }

		  void Init(SbjCore::Mvc::DesignView::Controller* p)
		  {
			  pTheCtrlr = p;
		  }

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			if (pTheCtrlr != NULL)
			{
				SbjCore::Mvc::Model::Events::ItemInsert* pTheEvent = dynamic_cast<SbjCore::Mvc::Model::Events::ItemInsert*>(pEvent);
				const SbjCore::Mvc::Model::Controller* pModelCtrlr = pTheEvent->pCtrlr;
				pTheCtrlr->InsertDesign(pModelCtrlr, pTheEvent->hChild, pTheEvent->hAfter);
			}
		}
	};


	/////////////////////////////////////////////////////////////////////////

	class SelCountChangedEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		SelCountChangedEventHandler() :
		  SbjCore::EventMgr::EventHandler(SbjCore::Mvc::MTE::EVID_SELCOUNT_CHANGED),
			  pTheCtrlr(NULL)
		  {
		  }

		  void Init(SbjCore::Mvc::DesignView::Controller* p)
		  {
			  pTheCtrlr = p;
		  }
	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			if (pTheCtrlr != NULL)
			{
				SbjCore::Mvc::MTE::SelCountChangedEvent* pTheEvent = dynamic_cast<SbjCore::Mvc::MTE::SelCountChangedEvent*>(pEvent);
				ASSERT(pTheEvent != NULL);
				if (pTheEvent != NULL)
				{
					SbjCore::Mvc::MultiRectTracker* pTracker = dynamic_cast<SbjCore::Mvc::MultiRectTracker*>(pTheEvent->GetData());
					if (pTracker != NULL)
					{
						SbjCore::Mvc::MultiRectTracker::t_RectTrackers rts;
						int nCount = pTracker->GetSelectedRectTrackers(rts);

						if (nCount > 0)
						{
							SbjCore::Mvc::Model::ItemHandles selItems;

							for (SbjCore::Mvc::MultiRectTracker::t_RectTrackers::iterator iter = rts.begin(); iter != rts.end(); iter++)
							{
								SbjCore::Mvc::RectTracker* p = dynamic_cast<SbjCore::Mvc::RectTracker*>(*iter);
								selItems.push_back(p->GetModelItemHandle());
							}
							SbjCore::Mvc::Model::Controller* pModelCtrlr = SbjCore::Mvc::Model::GetCurController();
							pModelCtrlr->SetSelectedItems(selItems);
						}

					}
				}
			}
		}
	};

	/////////////////////////////////////////////////////////////////////////////////////

	class ItemChangeEventHandler : public SbjCore::EventMgr::EventHandler
	{
		SbjCore::Mvc::DesignView::Controller* pTheCtrlr;
	public:
		ItemChangeEventHandler() :
		  SbjCore::EventMgr::EventHandler(SbjCore::Mvc::Model::Events::EVID_ITEM_CHANGED),
			  pTheCtrlr(NULL)
		  {

		  }

		  void Init(SbjCore::Mvc::DesignView::Controller* p)
		  {
			  pTheCtrlr = p;
		  }

	private:		
		virtual void OnHandle(SbjCore::EventMgr::Event* pEvent)
		{
			ASSERT(pTheCtrlr != NULL);
			if (pTheCtrlr != NULL)
			{
				SbjCore::Mvc::Model::Events::ItemChange* pTheEvent = dynamic_cast<SbjCore::Mvc::Model::Events::ItemChange*>(pEvent);
				ASSERT(pTheEvent != NULL);
				if (pTheEvent != NULL)
				{
					SbjCore::Mvc::DesignView::Item* pItem  = pTheCtrlr->GetItem(pTheEvent->hItem);
					SbjCore::Mvc::RectTracker* pTracker = pItem->GetRectTracker();
					if (pTracker != NULL)
					{
						pTracker->Update();
					}
				}
			}
		}
	};

	// Message Handlers /////////////////////////////////////////////////////////////////////
	
	class OnCreateHandler : public SbjCore::Mvc::WndMsgHandler
	{
		CALL_DEFAULT_FIRST()

		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			wParam;
			lParam;
			*pResult = 0;
			LRESULT lRslt = -1;

			SbjCore::Mvc::Controller* p = GetController();


			if (p != NULL)
			{
				p->Initialize();
				lRslt = 0;
			}			 

			return lRslt;
		}
	};
					  	
	class OnEraseBkgndHandler : public SbjCore::Mvc::WndMsgHandler
	{
//		CALL_DEFAULT_FIRST() // comment out to handle message before default
	
		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			wParam;
			lParam;
			*pResult = 0;
			LRESULT lRslt = 1;
	
			return lRslt;
		}
	
	};
	
	class LButtonDownMsgHandler : public SbjCore::Mvc::WndMsgHandler
	{
		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			pResult;
			UINT nFlags = (UINT)wParam;
			CPoint pt = CPoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));

			SbjCore::Mvc::DesignView::Controller* pTheCtrlr = dynamic_cast<SbjCore::Mvc::DesignView::Controller*>(GetController());
			if (pTheCtrlr != NULL)
			{
				pTheCtrlr->GetTracker()->Track(pt, nFlags);
			}

			return 0;
		}
	};

	class SetCursorMsgHandler : public SbjCore::Mvc::WndMsgHandler
	{
		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			wParam;
			lParam;
			pResult;
			LRESULT lRslt  = 0;																						   
			SbjCore::Mvc::DesignView::Controller* pTheCtrlr = dynamic_cast<SbjCore::Mvc::DesignView::Controller*>(GetController());
			if (pTheCtrlr != NULL)
			{
				lRslt = (LRESULT)pTheCtrlr->GetTracker()->SetCursor(LOWORD(lParam), HIWORD(lParam));

			}

			return lRslt;
		}
	};
	
	class SetFocusHandler : public SbjCore::Mvc::WndMsgHandler
	{
		// CALL_DEFAULT_FIRST() // comment out to handle message before default

		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			wParam;
			lParam;
			*pResult = 0;
			LRESULT lRslt = 1;

			SbjCore::Mvc::WndController* pCtrlr = GetController();

			CWnd* pWnd = pCtrlr->GetWnd();

			pWnd->Invalidate();

			return lRslt;
		}

	};

	class KillFocusHandler : public SbjCore::Mvc::WndMsgHandler
	{
		// CALL_DEFAULT_FIRST() // comment out to handle message before default

		virtual LRESULT OnHandleWndMsg(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
		{
			wParam;
			lParam;
			*pResult = 0;
			LRESULT lRslt = 1;

			SbjCore::Mvc::DesignView::Controller* pCtrlr = dynamic_cast<SbjCore::Mvc::DesignView::Controller*>(GetController());
			SbjCore::Mvc::MultiRectTracker* pTracker = pCtrlr->GetTracker();
			pTracker->DeselectAll();

			CWnd* pWnd = pCtrlr->GetWnd();

			pWnd->Invalidate();

			return lRslt;
		}

	};
	
}

///////////////////////////////////////////////////////////////////////////////

namespace SbjCore
{
	namespace Mvc
	{
		namespace DesignView
		{
			struct ControllerImpl
			{
				SbjCore::Mvc::MultiRectTracker theTracker;

				typedef std::map<HANDLE, Item*> HandleToItem;
				typedef HandleToItem::iterator HandleToItemIter;
				HandleToItem theItems;
				
				typedef std::map<CString, CRuntimeClass*> ItemRTCMap;
				typedef ItemRTCMap::iterator ItemRTCMapIter;
				ItemRTCMap theItemRTCMap;

				localNS::FileOpenEventHandler theFileOpenEventHandler;
				localNS::FileNewEventHandler theFileNewEventHandler;
				localNS::ItemInsertEventHandler theItemInsertEventHandler;
				localNS::SelCountChangedEventHandler theSelCountChangedEventHandler;
				localNS::ItemChangeEventHandler theItemChangedHandler;

				localNS::DocModifiedEventHandler theDocModifiedEventHandler;
				localNS::ItemRemoveEventHandler theItemRemoveEventHandler;

				localNS::OnCreateHandler theOnCreateHandler;
				localNS::OnEraseBkgndHandler theOnEraseBkgndHandler;
				localNS::LButtonDownMsgHandler theLButtonDownHandler;
				localNS::SetCursorMsgHandler theSetCursorHandler;
				localNS::SetFocusHandler theSetFocusHandler;	
				localNS::KillFocusHandler theKillFocusHandler;	

				ControllerImpl()
				{
				}

				virtual ~ControllerImpl()
				{
					DeleteAllItems();
				}

				void DeleteAllItems()
				{
					for (HandleToItemIter iter = theItems.begin(); iter != theItems.end(); iter++)
					{
						Item* pItem = iter->second;
						if (pItem != NULL)
						{
							if (pItem->IsTrackable())
							{
								theTracker.Remove(pItem->GetRectTracker());
							}
							delete pItem;
						}
					}
					theItems.clear();
					theTracker.RemoveAll();
				}

				void DeleteItem(Item* pItem)
				{
					if (pItem != NULL)
					{
						if (pItem->IsTrackable())
						{
							theTracker.Remove(pItem->GetRectTracker());
							HANDLE hItem = pItem->GetModelItemHandle();
							theItems.erase(hItem);
						}
						delete pItem;
					}
				}

				Item* GetItemFromPoint(const CPoint& pt) const
				{
					pt;
					return NULL;
				}
				
				Item* CreateItem(Controller* pCtrlr, const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hModelItem )
				{
					Item* pItem = NULL;
					CString sItemType = pModelCtrlr->GetItemTypeName(hModelItem);
					if (!sItemType.IsEmpty())
					{
						CRuntimeClass* pRTC = theItemRTCMap[sItemType];
						if (pRTC != NULL)
						{
							pItem = dynamic_cast<Item*>(pRTC->CreateObject());
							pItem->SetController(pCtrlr);
							pItem->SetModelItemHandle(hModelItem);
							theItems[hModelItem] = pItem;
							if (pItem->IsTrackable())
							{
								theTracker.Add(pItem->GetRectTracker());
							}
						}
					}
					return pItem;
				}
				

				void LoadDesign(Controller* pCtrlr, const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hItem )
				{
					DeleteAllItems();
					InsertDesign(pCtrlr, pModelCtrlr, hItem);
				}

				void InsertDesign(Controller* pCtrlr, const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hItem, HANDLE hAfter = NULL)
				{
					hAfter;
					Action theAction(pModelCtrlr, pCtrlr, NULL, RUNTIME_CLASS(InsertActionHandler));
					theAction.Apply(hItem);
				}


				void OnDraw(Controller* pCtrlr, CDC* pDC)
				{
					SbjCore::Utils::GDI::CMemDC dc(pDC);
					DrawAction theAction(SbjCore::Mvc::Model::GetCurController(), pCtrlr, &dc, NULL, RUNTIME_CLASS(DrawActionHandler));
					if (theItems.size() > 0)
					{
						theAction.Apply(theItems.begin()->first);
						theTracker.Draw(&dc);
					}
				}

				SbjCore::Utils::Menu::ItemRange OnPrepareCtxMenu( CMenu& ctxMenu )
				{
					SbjCore::Utils::Menu::ItemRange menuItems;
					SbjCore::Mvc::MultiRectTracker::t_RectTrackers rts;
					int nCount = theTracker.GetSelectedRectTrackers(rts);
					if (nCount > 0)
					{

						menuItems.nFirst = (int)ctxMenu.GetMenuItemCount()-1;
						menuItems.nLast = menuItems.nFirst; 

						if (SbjCore::Utils::Menu::InsertSeparator(ctxMenu, menuItems.nLast))
						{
							menuItems.nLast++;
						}

						(void)ctxMenu.InsertMenu(menuItems.nLast, MF_BYPOSITION, ID_SBJCORE_CTX_DELETE, _T("Delete Selected"));
					}
					return menuItems;
				}

			};
			
			/////////////////////////////////////////////////////////

			IMPLEMENT_DYNCREATE(Controller, WndController)

			Controller::Controller(void) :
				m_pImpl(new ControllerImpl)
			{
				m_pImpl->theTracker.SetController(this);


				AddHandler(WM_CREATE, &m_pImpl->theOnCreateHandler);
				AddHandler(WM_ERASEBKGND, &m_pImpl->theOnEraseBkgndHandler);
				AddHandler(WM_LBUTTONDOWN, &m_pImpl->theLButtonDownHandler);
				AddHandler(WM_SETCURSOR, &m_pImpl->theSetCursorHandler);
				AddHandler(WM_SETFOCUS, &m_pImpl->theSetFocusHandler);
				AddHandler(WM_KILLFOCUS, &m_pImpl->theKillFocusHandler);
			}									   

			Controller::~Controller(void)
			{
				try
				{
					delete m_pImpl;
				}
				catch(...)
				{
					ASSERT(FALSE);
				}
			}
			
			void Controller::OnInitialize()
			{
				CView* pView = (CView*)GetWnd();
				m_pImpl->theDocModifiedEventHandler.SetView(pView);
				m_pImpl->theFileOpenEventHandler.Init(this);
				m_pImpl->theFileNewEventHandler.Init(this);
				m_pImpl->theItemInsertEventHandler.Init(this);
				m_pImpl->theSelCountChangedEventHandler.Init(this);
				m_pImpl->theItemChangedHandler.Init(this);
				m_pImpl->theItemRemoveEventHandler.SetCtrlr(this);
			}

			void Controller::MapItemRTCToModelTypeName(LPCTSTR lpszName, CRuntimeClass* pRTC )
			{
				m_pImpl->theItemRTCMap[lpszName] = pRTC;
			}

			Item* Controller::CreateItem(const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hModelItem )
			{
				return m_pImpl->CreateItem(this, pModelCtrlr, hModelItem);
			}
			
			void Controller::DeleteAllItems()
			{
				m_pImpl->DeleteAllItems();
			}

			void Controller::DeleteItem( Item* pItem )
			{
				m_pImpl->DeleteItem(pItem);
			}

			SbjCore::Mvc::MultiRectTracker* Controller::GetTracker() const
			{
				return &m_pImpl->theTracker;
			}

			Item* Controller::GetItemFromPoint( const CPoint& pt ) const
			{
				return m_pImpl->GetItemFromPoint(pt);
			}

			Item* Controller::GetItem( const HANDLE hItem ) const
			{
				return m_pImpl->theItems[hItem];
			}

			void Controller::Draw(CDC* pDC)
			{
				OnDraw(pDC);
			}

			void Controller::OnDraw(CDC* pDC)
			{
				m_pImpl->OnDraw(this, pDC);
			}

			SbjCore::Utils::Menu::ItemRange Controller::OnPrepareCtxMenu( CMenu& ctxMenu )
			{
				return m_pImpl->OnPrepareCtxMenu(ctxMenu);

			}

			void Controller::LoadDesign(const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hItem )
			{
				m_pImpl->LoadDesign(this, pModelCtrlr, hItem);
			}

			void Controller::InsertDesign(const SbjCore::Mvc::Model::Controller* pModelCtrlr, HANDLE hItem, HANDLE hAfter /*= NULL*/)
			{
				m_pImpl->InsertDesign(this, pModelCtrlr, hItem, hAfter);
			}
		}
	}
}
//*** Modification History ***
// $Log: /SbjDev/SbjCore/DesignViewController.cpp $
// 
// 10    11/12/08 2:22p Steve
// Finished Generalization of Model  v2.0.1
// 
// 9     10/26/08 9:19a Steve
// 
// 8     10/24/08 9:03a Steve
// 
// 7     10/20/08 11:06a Steve
// Removed source parameter from Event and replaced with EventT data
// 
// 6     10/16/08 2:41a Steve
// Ready for publishing
// 
// 5     10/14/08 1:12p Steve
// Implemented Deletes

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About the Author

SBJ

United States United States
Real name is Steve Johnson. Programming since 1979. Started on a Heathkit Micro with a DEC LSI-11 and UCSD Pascal. Moved to PCs & DOS as soon as Turbo Pascal became available. Did some Assembly, ISR, TSR etc. All this while working for a Manufacturing Co. for 8 years. Had my own solo Co. doing barcode labeling software for 4 years (terrible business man, all I wanted to do was code). Since then working for various software companies. Moved to Windows around the time of 3.1 with Borland C then C++. Then on to VC++ and MFC, and just about anything I could get my hands on or had to learn for my job, and been at it ever since. Of course recently I've been playing with .NET, ASP, C#, WPF etc.

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