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

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19 Mar 2009CPOL13 min read 80.5K   2.4K   51  
A Model-View-Controller Framework that integrates with the MFC Doc/View architecture.
 
//------------------------------------------------------------------------- -----
// $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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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
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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Posted 19 Mar 2009

Article Copyright 2009 by SBJ
Everything else Copyright © CodeProject, 1999-2024

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