windows-nt/Source/XPSP1/NT/sdktools/unicows/samples/oclient/old/mainview.cpp

// mainview.cpp : implementation of the CMainView class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.


#include "stdafx.h"
#include "oclient.h"

#include "maindoc.h"
#include "mainview.h"
#include "rectitem.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMainView

CBrush NEAR CMainView::m_brHatch;
CLIPFORMAT CMainView::m_cfObjectDescriptor=NULL;

IMPLEMENT_DYNCREATE(CMainView, CScrollView)

BEGIN_MESSAGE_MAP(CMainView, CScrollView)
	//{{AFX_MSG_MAP(CMainView)
	ON_COMMAND(ID_EDIT_PASTE, OnPaste)
	ON_COMMAND(ID_EDIT_PASTE_LINK, OnPasteLink)
	ON_COMMAND(ID_OLE_INSERT_NEW, OnInsertObject)
	ON_UPDATE_COMMAND_UI(ID_EDIT_CLEAR, OnUpdateEditMenu)
	ON_COMMAND(ID_EDIT_CLEAR, OnEditClear)
	ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
	ON_COMMAND(ID_EDIT_CUT, OnEditCut)
	ON_WM_LBUTTONDBLCLK()
	ON_WM_LBUTTONDOWN()
	ON_WM_SETCURSOR()
	ON_WM_RBUTTONDOWN()
	ON_WM_CHAR()
	ON_WM_SETFOCUS()
	ON_WM_CREATE()
	ON_WM_SIZE()
	ON_COMMAND(ID_OBJECT_DISPLAYCONTENT, OnObjectDisplayContent)
	ON_UPDATE_COMMAND_UI(ID_OBJECT_DISPLAYCONTENT, OnUpdateObjectDisplayContent)
	ON_COMMAND(ID_OBJECT_DISPLAYASICON, OnObjectDisplayAsIcon)
	ON_UPDATE_COMMAND_UI(ID_OBJECT_DISPLAYASICON, OnUpdateObjectDisplayAsIcon)
	ON_COMMAND(ID_EDIT_PASTE_SPECIAL, OnPasteSpecial)
	ON_UPDATE_COMMAND_UI(ID_EDIT_CLONE, OnUpdateEditClone)
	ON_COMMAND(ID_EDIT_CLONE, OnEditClone)
	ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE_SPECIAL, OnUpdateEditPaste)
	ON_COMMAND(ID_OBJECT_RESETSIZE, OnObjectResetsize)
	ON_COMMAND(ID_CANCEL_INPLACE, OnCancelInplace)
	ON_WM_DESTROY()
	ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
	ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditMenu)
	ON_UPDATE_COMMAND_UI(ID_EDIT_CUT, OnUpdateEditMenu)
	ON_UPDATE_COMMAND_UI(ID_OBJECT_RESETSIZE, OnUpdateEditMenu)
	ON_COMMAND(ID_OLE_CHANGE_SOURCE, OnOleChangeSource)
	ON_UPDATE_COMMAND_UI(ID_OLE_CHANGE_SOURCE, OnUpdateOleChangeSource)
	ON_COMMAND(ID_OLE_EDIT_PROPERTIES, OnOleEditProperties)
	ON_UPDATE_COMMAND_UI(ID_OLE_EDIT_PROPERTIES, OnUpdateOleEditProperties)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMainView construction/destruction

CMainView::CMainView()
{
	if (m_brHatch.m_hObject == NULL)
		m_brHatch.CreateHatchBrush(HS_DIAGCROSS, RGB(0,0,0));
	if (m_cfObjectDescriptor == NULL)
		m_cfObjectDescriptor =
			(CLIPFORMAT)::RegisterClipboardFormat(_T("Object Descriptor"));

	m_pSelection = NULL;
	m_prevDropEffect = DROPEFFECT_NONE;
	m_bInDrag = FALSE;
}

CMainView::~CMainView()
{
}

void CMainView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();

	// We can't pass MM_ANISOTROPIC to SetScrollSizes so we have to convert to MM_TEXT
	CSize size = GetDocument()->GetDocumentSize();
	CClientDC dc(NULL);
	size.cx = MulDiv(size.cx, dc.GetDeviceCaps(LOGPIXELSX), 100);
	size.cy = MulDiv(size.cy, dc.GetDeviceCaps(LOGPIXELSY), 100);
	SetScrollSizes(MM_TEXT, size);
}

/////////////////////////////////////////////////////////////////////////////
// CMainView drawing

void CMainView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
	CScrollView::OnPrepareDC(pDC, pInfo);
	// set up a reasonable default context
	pDC->SetTextColor(::GetSysColor(COLOR_WINDOWTEXT));
	pDC->SetBkColor(::GetSysColor(COLOR_WINDOW));

	// LOENGLISH units are based on physical inches
	// We want logical inches so we have to do it differently
	pDC->SetMapMode(MM_ANISOTROPIC);
	pDC->SetViewportExt(
		pDC->GetDeviceCaps(LOGPIXELSX), pDC->GetDeviceCaps(LOGPIXELSY));
	pDC->SetWindowExt(100,-100);
}

void CMainView::SetupTracker(CRectTracker* pTracker, CRectItem* pItem,
	CRect* pTrueRect)
{
	ASSERT(pTracker != NULL);
	ASSERT(pItem != NULL);

	pTracker->m_rect = pItem->GetRect();
	DocToClient(pTracker->m_rect);

	// set minimum size for our OLE items
	pTracker->m_sizeMin.cx = 8;
	pTracker->m_sizeMin.cy = 8;

	pTracker->m_nStyle = 0;

	// setup resize handles if item is selected
	if (pItem == m_pSelection)
		pTracker->m_nStyle |= CRectTracker::resizeInside;

	// put correct border depending on item type
	if (pItem->GetType() == OT_LINK)
		pTracker->m_nStyle |= CRectTracker::dottedLine;
	else
		pTracker->m_nStyle |= CRectTracker::solidLine;

	// put hatching over the item if it is currently open
	if (pItem->GetItemState() == COleClientItem::openState ||
		pItem->GetItemState() == COleClientItem::activeUIState)
	{
		pTracker->m_nStyle |= CRectTracker::hatchInside;
	}

	if (pTrueRect != NULL)
		pTracker->GetTrueRect(pTrueRect);
}

void CMainView::OnDraw(CDC* pDC)
{
	CMainDoc* pDoc = GetDocument();

	ASSERT_VALID(pDC);

	if (!pDC->IsPrinting())
	{
		m_brHatch.UnrealizeObject();
		CPoint point(0, 0);
		pDC->LPtoDP(&point);
		pDC->SetBrushOrg(point.x % 8, point.y % 8);

		CRect rcClip;
		GetClientRect(&rcClip);
		ClientToDoc(rcClip);
		CSize docSize = pDoc->GetDocumentSize();
		if (rcClip.right > docSize.cx)
		{
			CRect rcFill(rcClip);
			rcFill.left = max(rcFill.left,docSize.cx);
			pDC->FillRect(rcFill,&m_brHatch);
		}
		if (rcClip.bottom < -docSize.cy)
		{
			CRect rcFill(rcClip);
			rcFill.top = min(rcFill.top, -docSize.cy);
			pDC->FillRect(rcFill,&m_brHatch);
		}
	}

	// Draw all the CRectItems
	POSITION pos = pDoc->GetStartPosition();
	while (pos != NULL)
	{
		CRectItem* pItem = DYNAMIC_DOWNCAST(CRectItem, pDoc->GetNextItem(pos));
		if (pItem != NULL)
		{
			pItem->Draw(pDC, pItem->GetRect());

			if (!pDC->IsPrinting())
			{
				// draw the tracker
				CRectTracker tracker;
				CRect rectTrue;
				SetupTracker(&tracker, pItem, &rectTrue);
				ClientToDoc(rectTrue);
				if (pDC->RectVisible(&rectTrue))
					tracker.Draw(pDC);
			}
		}
	}
}

// pHint is the deleted item or NULL if deselect/delete all
void CMainView::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint)
{
	if (pHint == NULL && lHint == 0)
	{
		// some sort of clear all
		m_pSelection = NULL;
	}

	if (pHint != NULL && pHint->IsKindOf(RUNTIME_CLASS(CRectItem)))
	{
		// just invalidate the one item
		InvalidateItem((CRectItem*)pHint);

		// clear selection if pointing to deleted item
		if (lHint == 1 && pHint == m_pSelection)
		{
			// specific case of pHint being deleted
			m_pSelection = NULL;
		}
	}
	else if (lHint != 0)
	{
		// invalidate arbitrary rectangle
		InvalidateRect((CRect*)lHint);
	}
	else
	{
		// complete update
		CScrollView::OnUpdate(pSender, lHint, pHint);
	}
}

void CMainView::InvalidateItem(CRectItem* pItem)
{
	if (m_nMapMode != 0)
	{
		CRectTracker tracker;
		CRect rect;
		SetupTracker(&tracker, pItem, &rect);
		InvalidateRect(&rect);
	}
}

BOOL CMainView::OnScrollBy(CSize sizeScroll, BOOL bDoScroll)
{
	// remove drag/drop feedback before scrolling
	if (bDoScroll && m_prevDropEffect != DROPEFFECT_NONE)
	{
		CClientDC dc(this);
		dc.DrawFocusRect(CRect(m_dragPoint, m_dragSize));
			// erase previous focus rect
		m_prevDropEffect = DROPEFFECT_NONE;
	}

	// do the scroll
	if (!CScrollView::OnScrollBy(sizeScroll, bDoScroll))
		return FALSE;

	// update the position of any in-place active item
	if (bDoScroll)
	{
		UpdateActiveItem();
		UpdateWindow();
	}

	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CMainView printing

BOOL CMainView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

/////////////////////////////////////////////////////////////////////////////
// Selection support

BOOL CMainView::IsSelected(const CObject* pDocItem) const
{
	return (pDocItem == m_pSelection);
}

void CMainView::SetSelection(CRectItem* pNewSel, BOOL bSafeSelect)
{
	if (pNewSel != NULL && pNewSel == m_pSelection)
		return;

	// deactivate any in-place active item on this view!
	COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
	if (pActiveItem != NULL && pNewSel != pActiveItem)
	{
		if (bSafeSelect)
			return;
		// if we found one, deactivate it
		pActiveItem->Close();
		ASSERT(GetDocument()->GetInPlaceActiveItem(this) == NULL);
	}
	if (m_pSelection != NULL) // invalidate the old item
		InvalidateItem(m_pSelection);
	if ((m_pSelection = pNewSel) != NULL) // invalidate the new item
		InvalidateItem(m_pSelection);
}

/////////////////////////////////////////////////////////////////////////////
// CMainView diagnostics

#ifdef _DEBUG
void CMainView::AssertValid() const
{
	CScrollView::AssertValid();
}

void CMainView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// Main 'Edit' menu commands

void CMainView::OnUpdateEditMenu(CCmdUI* pCmdUI)
{
	// most Edit menu commands are enabled only if we have a selection
	//  and there are no in-place activations for this view
	pCmdUI->Enable(m_pSelection != NULL &&
		GetDocument()->GetInPlaceActiveItem(this) == NULL);
}

void CMainView::OnEditCut()
{
	ASSERT(m_pSelection != NULL);
	TRY
	{
		m_pSelection->CopyToClipboard(TRUE);
		OnEditClear();
	}
	CATCH_ALL(e)
	{
		AfxMessageBox(IDP_CLIPBOARD_CUT_FAILED);
	}
	END_CATCH_ALL
}

void CMainView::OnEditCopy()
{
	ASSERT(m_pSelection != NULL);
	TRY
	{
		m_pSelection->CopyToClipboard(TRUE);
	}
	CATCH_ALL(e)
	{
		AfxMessageBox(IDP_CLIPBOARD_COPY_FAILED);
	}
	END_CATCH_ALL
}

void CMainView::OnEditClear()
{
	if (m_pSelection != NULL)
		GetDocument()->DeleteItem(m_pSelection);
}

void CMainView::OnPaste()
{
	if (DoPasteItem(FALSE, NULL, NULL) == NULL)
		AfxMessageBox(IDP_GET_FROM_CLIPBOARD_FAILED);
}

void CMainView::OnPasteLink()
{
	if (DoPasteItem(TRUE, NULL, NULL) == NULL)
		AfxMessageBox(IDP_GET_FROM_CLIPBOARD_FAILED);
}

void CMainView::DoPasteNative(
	COleDataObject* pDataObject, CPoint* pPoint, CRectItem* pItem)
{
	// get file refering to clipboard data
	CFile* pFile = pDataObject->GetFileData(CMainDoc::m_cfPrivate);
	if (pFile == NULL)
		{
		// if the file failed to open, throw an exception
		// to force cleanup in DoPasteItem.  the exact
		// type of exception thrown here is unimportant...

		AfxThrowFileException(CFileException::generic);
		}

	CArchive ar(pFile, CArchive::load);
	TRY
	{
		// connect the file to an archive and read the data
		ar.m_pDocument = GetDocument(); // for COleClientItem serialize
		pItem->Serialize(ar);
	}
	CATCH_ALL(e)
	{
		ar.Close();
		delete pFile;
		THROW_LAST();
	}
	END_CATCH_ALL

	ar.Close();
	delete pFile;

	// adjust position to that specified by point
	if (pPoint != NULL)
		pItem->m_ptPos = *pPoint;
}

void CMainView::DoPasteStandard(BOOL bLink, COleDataObject* pDataObject,
	CPoint* pPoint, CRectItem* pItem, CLIPFORMAT cfFormat)
{
	if (bLink)      // paste link
	{
		if (!pItem->CreateLinkFromData(pDataObject))
			AfxThrowMemoryException();  // any exception will do
	}
	// paste embedded
	else if (!pItem->CreateFromData(pDataObject) &&
		!pItem->CreateStaticFromData(pDataObject, OLERENDER_DRAW, cfFormat))
	{
		AfxThrowMemoryException();      // any exception will do
	}

	// copy the current iconic representation
	FORMATETC fmtetc;
	fmtetc.cfFormat = CF_METAFILEPICT;
	fmtetc.dwAspect = DVASPECT_ICON;
	fmtetc.ptd = NULL;
	fmtetc.tymed = TYMED_MFPICT;
	fmtetc.lindex = 1;
	HGLOBAL hObj = pDataObject->GetGlobalData(CF_METAFILEPICT, &fmtetc);
	if (hObj != NULL)
	{
		pItem->SetIconicMetafile(hObj);
		// the following code is an easy way to free a metafile pict
		STGMEDIUM stgMed;
		memset(&stgMed, 0, sizeof(stgMed));
		stgMed.tymed = TYMED_MFPICT;
		stgMed.hGlobal = hObj;
		ReleaseStgMedium(&stgMed);
	}

	// set the current drawing aspect
	hObj = pDataObject->GetGlobalData(m_cfObjectDescriptor);
	if (hObj != NULL)
	{
		ASSERT(hObj != NULL);
		// got CF_OBJECTDESCRIPTOR ok.  Lock it down and extract size.
		LPOBJECTDESCRIPTOR pObjDesc = (LPOBJECTDESCRIPTOR)GlobalLock(hObj);
		ASSERT(pObjDesc != NULL);
		pItem->SetDrawAspect((DVASPECT)pObjDesc->dwDrawAspect);
		GlobalUnlock(hObj);
		GlobalFree(hObj);
	}

	// set top-left based on point of drop
	if (pPoint != NULL)
		pItem->m_ptPos = *pPoint;

	// get size from drag/drop operation
	CSize size;
	if (GetObjectInfo(pDataObject, &size, NULL) && size.cx != 0 && size.cy != 0)
	{
		// use size obtained from object instead of default
		size.cx = MulDiv(size.cx, 10, 254);
		size.cy = -MulDiv(size.cy, 10, 254);
		pItem->SetSize(size);
		CSize sizeExtent;
		pItem->GetCachedExtent(&sizeExtent);
		pItem->SetBaseSize(sizeExtent);
	}
	else
	{
		// no extent from CF_OBJECTDESCRIPTOR, use extent from object
		pItem->UpdateExtent();
	}
}


// Helper for paste/pastelink
//
//                  bLink       pDataObject     pPoint              cfFormat
//  EditPaste       FALSE       NULL(clipboard) NULL(default)       0
//  Drag/Drop       TRUE/FALSE  X               X                   0
//  PasteLink       TRUE        NULL(clipboard) NULL(default)       0
//  PasteSpecial    TRUE/FALSE  X               NULL(default)       X
CRectItem* CMainView::DoPasteItem(BOOL bLink, COleDataObject* pDataObject,
	CPoint* pPoint, CLIPFORMAT cfFormat)
{
	BeginWaitCursor();

	CRectItem* pItem = GetDocument()->CreateItem();
	ASSERT_VALID(pItem);
	BOOL bAllowAdjust = (pPoint == NULL) ? TRUE : FALSE;

	// use clipboard data if not doing drag/drop
	COleDataObject clipboardData;
	if (pDataObject == NULL)
	{
		clipboardData.AttachClipboard();
		pDataObject = &clipboardData;
	}

	TRY
	{
		if (cfFormat == CMainDoc::m_cfPrivate)
		{
			// if format specified (i.e. PasteSpecial) then use that one
			DoPasteNative(pDataObject, pPoint, pItem);
		}
		else if (!bLink && cfFormat == 0 &&
			pDataObject->IsDataAvailable(CMainDoc::m_cfPrivate))
		{
			// if we're not pasting a link, cfFormat was unspecified,
			// and private format is available use it
			DoPasteNative(pDataObject, pPoint, pItem);
		}
		// otherwise perform a standard paste
		else if (bAllowAdjust)
		{
			CPoint ptDef(10, -10);
			DoPasteStandard(bLink, pDataObject, &ptDef, pItem, cfFormat);
		}
		else
		{
			DoPasteStandard(bLink, pDataObject, pPoint, pItem, cfFormat);
		}

		if (bAllowAdjust)
		{
			// allow document to adjust position of item so that it doesn't
			// lay directly over an item of the same size
			// this only occurs if the drop point is not specified
			GetDocument()->AdjustItemPosition(pItem);
		}
	}
	CATCH_ALL(e)
	{
		// general cleanup
		TRACE0("failed to embed/link an OLE object\n");
		pItem->Delete();
		pItem = NULL;
	}
	END_CATCH_ALL

	// set the selection with bSafeSelect = TRUE
	SetSelection(pItem, TRUE);

	// update the document and views
	GetDocument()->SetModifiedFlag();
	GetDocument()->UpdateAllViews(NULL, 0, pItem);      // including this view

	EndWaitCursor();

	return pItem;
}

/////////////////////////////////////////////////////////////////////////////
// Insert New Object and Activate Object

void CMainView::OnInsertObject()
{
	COleInsertDialog dlg;
	if (dlg.DoModal() != IDOK)
		return;

	BeginWaitCursor();

	CRectItem* pItem = NULL;
	TRY
	{
		// create item from dialog results
		pItem = GetDocument()->CreateItem();
		if (!dlg.CreateItem(pItem))
			AfxThrowMemoryException();  // any exception will do

		// try to get initial presentation data
		pItem->UpdateLink();
		pItem->UpdateExtent();

		// if insert new object -- initially show the object
		if (dlg.GetSelectionType() == COleInsertDialog::createNewItem)
			pItem->DoVerb(OLEIVERB_SHOW, this);

		SetSelection(pItem);
	}
	CATCH_ALL(e)
	{
		// cleanup item, if allocated
		if (pItem != NULL)
			GetDocument()->DeleteItem(pItem);

		AfxMessageBox(IDP_FAILED_TO_CREATE);
	}
	END_CATCH_ALL

	EndWaitCursor();
}

void CMainView::OnLButtonDblClk(UINT, CPoint)
{
	// Double click will activate the main verb
	if (m_pSelection != NULL)
	{
		BeginWaitCursor();
		LONG iVerb = OLEIVERB_PRIMARY;
		if (GetKeyState(VK_CONTROL) < 0)
			iVerb = OLEIVERB_OPEN;
		m_pSelection->DoVerb(iVerb, this);
		EndWaitCursor();
	}
}

/////////////////////////////////////////////////////////////////////////////
// Hit detection, moving and resizing items

CRectItem* CMainView::GetHitItem(CPoint point)
{
	CMainDoc* pDoc = GetDocument();
	CRectItem* pItemHit = NULL;

	// Find the item hit by the mouse
	POSITION pos = pDoc->GetStartPosition();
	while (pos != NULL)
	{
		CRectItem* pItem = DYNAMIC_DOWNCAST(CRectItem, pDoc->GetNextItem(pos));
		if (pItem != NULL)
		{
			CRectTracker tracker;
			SetupTracker(&tracker, pItem);
			if (tracker.HitTest(point) >= 0)
			{
				pItemHit = pItem;
				// items later in the list are drawn on top - so keep looking
			}
		}
	}
	return pItemHit;
}

void CMainView::DocToClient(CRect& rect)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.LPtoDP(&rect); // convert logical rect to device rect
	rect.NormalizeRect();
}

void CMainView::ClientToDoc(CRect& rect)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.DPtoLP(&rect); // convert device rect to logical rect
}

void CMainView::DocToClient(CSize& size)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.LPtoDP(&size); // convert logical size to device size
	size.cx = abs(size.cx);
	size.cy = abs(size.cy);
}

void CMainView::ClientToDoc(CSize& size)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.DPtoLP(&size); // convert device rect to logical rect
	size.cx = abs(size.cx);
	size.cy = abs(size.cy);
}

void CMainView::DocToClient(CPoint& point)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.LPtoDP(&point); // convert logical point to device point
}

void CMainView::ClientToDoc(CPoint& point)
{
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.DPtoLP(&point); // convert device point to logical point
}

void CMainView::OnLButtonDown(UINT /*nFlags*/, CPoint point)
{
	CRectItem* pItemHit = GetHitItem(point);
	SetSelection(pItemHit);
	if (pItemHit == NULL)
		return;

	CRect rectLimit;
	GetClientRect(rectLimit);

	CRectTracker tracker;
	SetupTracker(&tracker, pItemHit);

	UpdateWindow(); // update before entering the tracker
	if (tracker.HitTest(point) == CRectTracker::hitMiddle) // moving, not sizing
	{
		// determine mouse position offset from the item itself
		CRect rect = pItemHit->GetRect();
		DocToClient(rect);
		CPoint ptOffset(point.x - rect.left, point.y - rect.top);

		// determine sensitivity rectangle (determines when drag starts)
		CRect rectDrag(rect.left, rect.top, rect.left+1, rect.top+1);

		// execute the drag/drop operation
		m_bInDrag = TRUE;
		ClientToScreen(&rect);  // must be in screen co-ordinates
		ClientToScreen(&rectDrag);
		DROPEFFECT dropEffect = pItemHit->DoDragDrop(rect, ptOffset,
			TRUE, DROPEFFECT_COPY|DROPEFFECT_MOVE, &rectDrag);
		if (m_bInDrag == FALSE) // move in same window
			return;
		m_bInDrag = FALSE;

		if (dropEffect == DROPEFFECT_MOVE)
		{
			// the item was moved (essentially a copy w/delete)
			pItemHit->Invalidate();
			if (m_pSelection == pItemHit)
				m_pSelection = NULL;
			GetDocument()->DeleteItem(pItemHit);
		}
	}
	else if (tracker.Track(this, point))
	{
		ClientToDoc(tracker.m_rect);
		pItemHit->Move(tracker.m_rect);
		GetDocument()->SetModifiedFlag();
	}
}

BOOL CMainView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	if (pWnd == this && m_pSelection != NULL)
	{
		// give the tracker for the selection a chance
		CRectTracker tracker;
		SetupTracker(&tracker, m_pSelection);
		if (tracker.SetCursor(this, nHitTest))
			return TRUE;
	}
	return CScrollView::OnSetCursor(pWnd, nHitTest, message);
}

/////////////////////////////////////////////////////////////////////////////
// Right mouse for popup context sensitive menu

void CMainView::OnRButtonDown(UINT, CPoint point)
{
	// make sure window is active
	GetParentFrame()->ActivateFrame();

	SetSelection(GetHitItem(point));    // reselect item if appropriate
	UpdateWindow();

	if (m_pSelection != NULL)
	{
		CMenu bar;
		if (bar.LoadMenu(ID_OBJECT_POPUP_MENU))
		{
			CMenu& popup = *bar.GetSubMenu(0);
			ASSERT(popup.m_hMenu != NULL);

			ClientToScreen(&point);
			popup.TrackPopupMenu(TPM_RIGHTBUTTON,
				point.x, point.y,
				AfxGetMainWnd()); // route commands through main window
		}
	}
}

void CMainView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	MessageBeep(0);     // to test for proper focus transfer

	CScrollView::OnChar(nChar, nRepCnt, nFlags);
}

void CMainView::OnSetFocus(CWnd* pOldWnd)
{
	COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
	if (pActiveItem != NULL &&
		pActiveItem->GetItemState() == COleClientItem::activeUIState)
	{
		// need to set focus to this item if it is in the same view
		CWnd* pWnd = pActiveItem->GetInPlaceWindow();
		if (pWnd != NULL)
		{
			pWnd->SetFocus();
			return;
		}
	}

	CScrollView::OnSetFocus(pOldWnd);
}

void CMainView::OnSize(UINT nType, int cx, int cy)
{
	CScrollView::OnSize(nType, cx, cy);

	UpdateActiveItem();
}

/////////////////////////////////////////////////////////////////////////////
// support for drag/drop

int CMainView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CScrollView::OnCreate(lpCreateStruct) == -1)
		return -1;

	// register drop target
	m_dropTarget.Register(this);

	return 0;
}

BOOL CMainView::OnDrop(COleDataObject* pDataObject,
	DROPEFFECT dropEffect, CPoint point)
{
	ASSERT_VALID(this);

	// clean up focus rect
	OnDragLeave();

	// offset point as appropriate for dragging
	GetObjectInfo(pDataObject, &m_dragSize, &m_dragOffset);
	CClientDC dc(NULL);
	dc.HIMETRICtoDP(&m_dragSize);
	dc.HIMETRICtoDP(&m_dragOffset);
	point -= m_dragOffset;

	// if move within the view
	ClientToDoc(point);
	if ((dropEffect & DROPEFFECT_MOVE) && m_bInDrag)
	{
		ASSERT(m_pSelection != NULL);
		m_bInDrag = FALSE; // signal drag code that a move happened
		// set top-left based on point of drop
		CRect rect = m_pSelection->GetRect();
		if (rect.TopLeft() != point) // if moved
		{
			m_pSelection->Move(CRect(point,rect.Size()));
			GetDocument()->SetModifiedFlag();
		}
	}
	// check and paste link
	else if ((dropEffect & DROPEFFECT_LINK) && DoPasteItem(TRUE, pDataObject, &point))
		return TRUE;

	// paste embedding/static
	else if (DoPasteItem(FALSE, pDataObject, &point))
		return TRUE;

	return FALSE;
}

BOOL CMainView::GetObjectInfo(COleDataObject* pDataObject,
	CSize* pSize, CSize* pOffset)
{
	ASSERT(pSize != NULL);

	// get object descriptor data
	HGLOBAL hObjDesc = pDataObject->GetGlobalData(m_cfObjectDescriptor);
	if (hObjDesc == NULL)
	{
		if (pOffset != NULL)
			*pOffset = CSize(0, 0); // fill in defaults instead
		*pSize = CSize(0, 0);
		return FALSE;
	}
	ASSERT(hObjDesc != NULL);

	// otherwise, got CF_OBJECTDESCRIPTOR ok.  Lock it down and extract size.
	LPOBJECTDESCRIPTOR pObjDesc = (LPOBJECTDESCRIPTOR)GlobalLock(hObjDesc);
	ASSERT(pObjDesc != NULL);
	pSize->cx = (int)pObjDesc->sizel.cx;
	pSize->cy = (int)pObjDesc->sizel.cy;
	if (pOffset != NULL)
	{
		pOffset->cx = (int)pObjDesc->pointl.x;
		pOffset->cy = (int)pObjDesc->pointl.y;
	}
	GlobalUnlock(hObjDesc);
	GlobalFree(hObjDesc);

	// successfully retrieved pSize & pOffset info
	return TRUE;
}

DROPEFFECT CMainView::OnDragEnter(COleDataObject* pDataObject,
	DWORD grfKeyState, CPoint point)
{
	ASSERT(m_prevDropEffect == DROPEFFECT_NONE);

	GetObjectInfo(pDataObject, &m_dragSize, &m_dragOffset);
	CClientDC dc(NULL);
	dc.HIMETRICtoDP(&m_dragSize);
	dc.HIMETRICtoDP(&m_dragOffset);

	return OnDragOver(pDataObject, grfKeyState, point);
}

DROPEFFECT CMainView::OnDragOver(COleDataObject*,
	DWORD grfKeyState, CPoint point)
{
	point -= m_dragOffset;  // adjust target rect by original cursor offset

	// check for point outside logical area -- i.e. in hatched region
	// GetTotalSize() returns the size passed to SetScrollSizes
	CRect rectScroll(CPoint(0, 0), GetTotalSize());

	CRect rectItem(point,m_dragSize);
	if (rectItem.IsRectEmpty())
	{
		// some apps might have a null size in the object descriptor...
		rectItem.InflateRect(1,1);
	}
	rectItem.OffsetRect(GetDeviceScrollPosition());

	DROPEFFECT de = DROPEFFECT_NONE;
	CRect rectTemp;
	if (rectTemp.IntersectRect(rectScroll, rectItem))
	{
		// check for force link
		if ((grfKeyState & (MK_CONTROL|MK_SHIFT)) == (MK_CONTROL|MK_SHIFT))
			de = DROPEFFECT_LINK;
		// check for force copy
		else if ((grfKeyState & MK_CONTROL) == MK_CONTROL)
			de = DROPEFFECT_COPY;
		// check for force move
		else if ((grfKeyState & MK_ALT) == MK_ALT)
			de = DROPEFFECT_MOVE;
		// default -- recommended action is move
		else
			de = DROPEFFECT_MOVE;
	}

	if (point == m_dragPoint)
		return de;

	// otherwise, cursor has moved -- need to update the drag feedback
	CClientDC dc(this);
	if (m_prevDropEffect != DROPEFFECT_NONE)
	{
		// erase previous focus rect
		dc.DrawFocusRect(CRect(m_dragPoint, m_dragSize));
	}
	m_prevDropEffect = de;
	if (m_prevDropEffect != DROPEFFECT_NONE)
	{
		m_dragPoint = point;
		dc.DrawFocusRect(CRect(point, m_dragSize));
	}
	return de;
}

void CMainView::OnDragLeave()
{
	CClientDC dc(this);
	if (m_prevDropEffect != DROPEFFECT_NONE)
	{
		dc.DrawFocusRect(CRect(m_dragPoint,m_dragSize)); // erase previous focus rect
		m_prevDropEffect = DROPEFFECT_NONE;
	}
}

/////////////////////////////////////////////////////////////////////////////
// Commands for switching display aspects

void CMainView::OnObjectDisplayContent()
{
	if (m_pSelection == NULL)
		return;
	ASSERT_VALID(m_pSelection);
	m_pSelection->Invalidate();
	m_pSelection->SetDrawAspect(DVASPECT_CONTENT);
	m_pSelection->UpdateExtent();
	m_pSelection->Invalidate();
}

void CMainView::OnUpdateObjectDisplayContent(CCmdUI* pCmdUI)
{
	if (m_pSelection == NULL)
	{
		pCmdUI->Enable(FALSE);
		return;
	}
	ASSERT_VALID(m_pSelection);
	pCmdUI->SetCheck(m_pSelection->GetDrawAspect() == DVASPECT_CONTENT);
	pCmdUI->Enable(TRUE);
}

void CMainView::OnObjectDisplayAsIcon()
{
	if (m_pSelection == NULL)
		return;
	ASSERT_VALID(m_pSelection);
	m_pSelection->Invalidate();
	m_pSelection->SetDrawAspect(DVASPECT_ICON);
	m_pSelection->UpdateExtent();
	m_pSelection->Invalidate();
}

void CMainView::OnUpdateObjectDisplayAsIcon(CCmdUI* pCmdUI)
{
	if (m_pSelection == NULL)
	{
		pCmdUI->Enable(FALSE);
		return;
	}
	ASSERT_VALID(m_pSelection);
	pCmdUI->SetCheck(m_pSelection->GetDrawAspect() == DVASPECT_ICON);
	pCmdUI->Enable(TRUE);
}

void CMainView::UpdateActiveItem()
{
	// when there is an active item visible, sizing the window may cause
	//  more/less of the in-place object to become visible.
	//  (ie. the clipping rectangle changes with the size of the window)
	// a container supporting scrolling would also have to do this
	//  when scrolling the contents of the window.

	COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
	if (pActiveItem != NULL &&
		pActiveItem->GetItemState() == COleClientItem::activeUIState &&
		pActiveItem->GetActiveView() == this)
	{
		// this will update the item rectangles by calling
		//  OnGetPosRect & OnGetClipRect.
		pActiveItem->SetItemRects();
	}
}

void CMainView::OnUpdateEditClone(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(m_pSelection != NULL);
}

void CMainView::OnEditClone()
{
	if (m_pSelection == NULL)
		return;

	BeginWaitCursor();

	CRectItem* pItem = NULL;
	TRY
	{
		// create item from dialog results
		pItem = GetDocument()->CreateItem();
		if (!pItem->CreateCloneFrom(m_pSelection))
			AfxThrowMemoryException();  // any exception will do

		// offset it so we can see the clone easier
		CRect rect(20, 20, 0, 0);
		ClientToDoc(rect);
		pItem->m_ptPos.x += rect.left;
		pItem->m_ptPos.y += rect.top;
		ASSERT_VALID(pItem);
	}
	CATCH_ALL(e)
	{
		// cleanup item, if allocated
		if (pItem != NULL)
			GetDocument()->DeleteItem(pItem);

		AfxMessageBox(IDP_FAILED_TO_CREATE);
	}
	END_CATCH_ALL

	EndWaitCursor();
}

void CMainView::OnPasteSpecial()
{
	COlePasteSpecialDialog dlg;
	dlg.AddFormat(CMainDoc::m_cfPrivate, TYMED_HGLOBAL,
		IDS_PRIVATE_CF_DESCR, FALSE, FALSE);
	dlg.AddStandardFormats();
	if (dlg.DoModal() != IDOK)
		return;

	CRectItem* pItem = NULL;
	TRY
	{
		// Get the clipboard format of the selected
		CLIPFORMAT cf = dlg.m_ps.arrPasteEntries[dlg.m_ps.nSelectedIndex].fmtetc.cfFormat;
		if (cf == CMainDoc::m_cfPrivate)
		{
			BOOL bLink = dlg.GetSelectionType() ==
				COlePasteSpecialDialog::pasteLink;
			COleDataObject dataObject;
			dataObject.Attach(dlg.m_ps.lpSrcDataObj, FALSE);
			pItem = DoPasteItem(bLink, &dataObject, NULL, cf);

			// try to get initial presentation data
			pItem->UpdateLink();
		}
		else
		{
			pItem = GetDocument()->CreateItem();
			if (!dlg.CreateItem(pItem))
			{
				TRACE0("Warning: paste special failed to create item.\n");
				AfxThrowMemoryException();
			}

			// try to get initial presentation data
			pItem->UpdateLink();

			// try to get initial extent
			pItem->UpdateExtent();

			// allow document to offset item to avoid direct superimposition
			GetDocument()->AdjustItemPosition(pItem);

			// set the selection with bSafeSelect = TRUE
			SetSelection(pItem, TRUE);
			GetDocument()->SetModifiedFlag();
			GetDocument()->UpdateAllViews(NULL, 0, pItem);
		}
	}
	CATCH_ALL(e)
	{
		// cleanup item, if allocated
		if (pItem != NULL)
			GetDocument()->DeleteItem(pItem);
		AfxMessageBox(IDP_FAILED_TO_CREATE);
		return;
	}
	END_CATCH_ALL
}

void CMainView::OnUpdateEditPaste(CCmdUI* pCmdUI)
{
	// determine if private or standard OLE formats are on the clipboard
	COleDataObject dataObj;
	BOOL bEnable = dataObj.AttachClipboard() &&
		(dataObj.IsDataAvailable(CMainDoc::m_cfPrivate) ||
		 COleClientItem::CanCreateFromData(&dataObj));

	// enable command based on availability
	pCmdUI->Enable(bEnable);
}

void CMainView::OnObjectResetsize()
{
	ASSERT(m_pSelection != NULL);
	m_pSelection->ResetSize();
}

void CMainView::OnCancelInplace()
{
	// deactivate the inplace active item on this frame/view
	COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
	if (pActiveItem != NULL)
		pActiveItem->Deactivate();
	ASSERT(GetDocument()->GetInPlaceActiveItem(this) == NULL);
}

void CMainView::OnDestroy()
{
	CScrollView::OnDestroy();

	// deactivate the inplace active item on this view
	COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
	if (pActiveItem != NULL && pActiveItem->GetActiveView() == this)
	{
		pActiveItem->Deactivate();
		ASSERT(GetDocument()->GetInPlaceActiveItem(this) == NULL);
	}
}

void CMainView::OnUpdateOleEditProperties(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(m_pSelection != NULL);
}

// edit properties dialog specific to OCLIENT
class COlePropertiesEx : public COlePropertiesDialog
{
public:
	COlePropertiesEx(COleClientItem* pItem,
		UINT nScaleMin = 10, UINT nScaleMax = 500, CWnd* pParentWnd = NULL)
		: COlePropertiesDialog(pItem, nScaleMin, nScaleMax, pParentWnd)
		{ }

	virtual BOOL OnApplyScale(
		COleClientItem* pItem, int nCurrentScale, BOOL bRelativeToOrig);
};

BOOL COlePropertiesEx::OnApplyScale(
	COleClientItem* pItem, int nCurrentScale, BOOL bRelativeToOrig)
{
	if (nCurrentScale != -1)
	{
		ASSERT_VALID(pItem);
		CRectItem* pRectItem = (CRectItem*)pItem;
		ASSERT_KINDOF(CRectItem, pRectItem);

		// reset to original size if necessary
		if (bRelativeToOrig)
			pRectItem->ResetSize();

		// update extent to reflect scaling factor
		pRectItem->Invalidate();
		CSize size = pRectItem->GetSize();
		size.cx = MulDiv(size.cx, nCurrentScale, 100);
		size.cy = MulDiv(size.cy, nCurrentScale, 100);
		pRectItem->SetSize(size);
		pRectItem->Invalidate();
	}
	return TRUE;
}

void CMainView::OnOleEditProperties()
{
	ASSERT(m_pSelection != NULL);

	COlePropertiesEx dlg(m_pSelection);
	dlg.DoModal();
}

void CMainView::OnUpdateOleChangeSource(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(m_pSelection != NULL && m_pSelection->GetType() == OT_LINK);
}

void CMainView::OnOleChangeSource()
{
	ASSERT(m_pSelection != NULL && m_pSelection->GetType() == OT_LINK);

	COleChangeSourceDialog dlg(m_pSelection);
	dlg.DoModal();
}