drawobj.cpp

一个VC++绘图源程序

	return CDrawObj::GetHandle(nHandle);
}

HCURSOR CDrawRect::GetHandleCursor(int nHandle)
{
	ASSERT_VALID(this);

	if (m_nShape == line && nHandle == 2)
		nHandle = 5;
	else if (m_nShape == roundRectangle && nHandle == 9)
		return AfxGetApp()->LoadStandardCursor(IDC_SIZEALL);
	return CDrawObj::GetHandleCursor(nHandle);
}

// point is in logical coordinates
void CDrawRect::MoveHandleTo(int nHandle, CPoint point, CDrawView* pView)
{
	ASSERT_VALID(this);

	if (m_nShape == line && nHandle == 2)
		nHandle = 5;
	else if (m_nShape == roundRectangle && nHandle == 9)
	{
		CRect rect = m_position;
		rect.NormalizeRect();
		if (point.x > rect.right - 1)
			point.x = rect.right - 1;
		else if (point.x < rect.left + rect.Width() / 2)
			point.x = rect.left + rect.Width() / 2;
		if (point.y > rect.bottom - 1)
			point.y = rect.bottom - 1;
		else if (point.y < rect.top + rect.Height() / 2)
			point.y = rect.top + rect.Height() / 2;
		m_roundness.x = 2 * (rect.right - point.x);
		m_roundness.y = 2 * (rect.bottom - point.y);
		m_pDocument->SetModifiedFlag();
		if (pView == NULL)
			Invalidate();
		else
			pView->InvalObj(this);
		return;
	}

	CDrawObj::MoveHandleTo(nHandle, point, pView);
}

// rect must be in logical coordinates
BOOL CDrawRect::Intersects(const CRect& rect)
{
	ASSERT_VALID(this);

	CRect rectT = rect;
	rectT.NormalizeRect();

	CRect fixed = m_position;
	fixed.NormalizeRect();
	if ((rectT & fixed).IsRectEmpty())
		return FALSE;

	CRgn rgn;
	switch (m_nShape)
	{
	case rectangle:
		return TRUE;

	case roundRectangle:
		rgn.CreateRoundRectRgn(fixed.left, fixed.top, fixed.right, fixed.bottom,
			m_roundness.x, m_roundness.y);
		break;

	case ellipse:
		rgn.CreateEllipticRgnIndirect(fixed);
		break;

	case line:
		{
			int x = (m_logpen.lopnWidth.x + 5) / 2;
			int y = (m_logpen.lopnWidth.y + 5) / 2;
			POINT points[4];
			points[0].x = fixed.left;
			points[0].y = fixed.top;
			points[1].x = fixed.left;
			points[1].y = fixed.top;
			points[2].x = fixed.right;
			points[2].y = fixed.bottom;
			points[3].x = fixed.right;
			points[3].y = fixed.bottom;

			if (fixed.left < fixed.right)
			{
				points[0].x -= x;
				points[1].x += x;
				points[2].x += x;
				points[3].x -= x;
			}
			else
			{
				points[0].x += x;
				points[1].x -= x;
				points[2].x -= x;
				points[3].x += x;
			}

			if (fixed.top < fixed.bottom)
			{
				points[0].y -= y;
				points[1].y += y;
				points[2].y += y;
				points[3].y -= y;
			}
			else
			{
				points[0].y += y;
				points[1].y -= y;
				points[2].y -= y;
				points[3].y += y;
			}
			rgn.CreatePolygonRgn(points, 4, ALTERNATE);
		}
		break;
	}
	return rgn.RectInRegion(fixed);
}

CDrawObj* CDrawRect::Clone(CDrawDoc* pDoc)
{
	ASSERT_VALID(this);

	CDrawRect* pClone = new CDrawRect(m_position);
	pClone->m_bPen = m_bPen;
	pClone->m_logpen = m_logpen;
	pClone->m_bBrush = m_bBrush;
	pClone->m_logbrush = m_logbrush;
	pClone->m_nShape = m_nShape;
	pClone->m_roundness = m_roundness;
	ASSERT_VALID(pClone);

	if (pDoc != NULL)
		pDoc->Add(pClone);

	ASSERT_VALID(pClone);
	return pClone;
}

////////////////////////////////////////////////////////////////////////////
// CDrawPoly

IMPLEMENT_SERIAL(CDrawPoly, CDrawObj, 0)

CDrawPoly::CDrawPoly()
{
	m_points = NULL;
	m_nPoints = 0;
	m_nAllocPoints = 0;
}

CDrawPoly::CDrawPoly(const CRect& position)
	: CDrawObj(position)
{
	m_points = NULL;
	m_nPoints = 0;
	m_nAllocPoints = 0;
	m_bPen = TRUE;
	m_bBrush = FALSE;
}

CDrawPoly::~CDrawPoly()
{
	if (m_points != NULL)
		delete[] m_points;
}

void CDrawPoly::Serialize( CArchive& ar )
{
	int i;
	CDrawObj::Serialize( ar );
	if( ar.IsStoring() )
	{
		ar << (WORD) m_nPoints;
		ar << (WORD) m_nAllocPoints;
		for (i = 0;i< m_nPoints; i++)
			ar << m_points[i];
	}
	else
	{
		WORD wTemp;
		ar >> wTemp; m_nPoints = wTemp;
		ar >> wTemp; m_nAllocPoints = wTemp;
		m_points = new CPoint[m_nAllocPoints];
		for (i = 0;i < m_nPoints; i++)
			ar >> m_points[i];
	}
}

void CDrawPoly::Draw(CDC* pDC)
{
	ASSERT_VALID(this);

	CBrush brush;
	if (!brush.CreateBrushIndirect(&m_logbrush))
		return;
	CPen pen;
	if (!pen.CreatePenIndirect(&m_logpen))
		return;

	CBrush* pOldBrush;
	CPen* pOldPen;

	if (m_bBrush)
		pOldBrush = pDC->SelectObject(&brush);
	else
		pOldBrush = (CBrush*)pDC->SelectStockObject(NULL_BRUSH);

	if (m_bPen)
		pOldPen = pDC->SelectObject(&pen);
	else
		pOldPen = (CPen*)pDC->SelectStockObject(NULL_PEN);

	pDC->Polygon(m_points, m_nPoints);

	pDC->SelectObject(pOldBrush);
	pDC->SelectObject(pOldPen);
}

// position must be in logical coordinates
void CDrawPoly::MoveTo(const CRect& position, CDrawView* pView)
{
	ASSERT_VALID(this);
	if (position == m_position)
		return;

	if (pView == NULL)
		Invalidate();
	else
		pView->InvalObj(this);

	for (int i = 0; i < m_nPoints; i += 1)
	{
		m_points[i].x += position.left - m_position.left;
		m_points[i].y += position.top - m_position.top;
	}

	m_position = position;

	if (pView == NULL)
		Invalidate();
	else
		pView->InvalObj(this);
	m_pDocument->SetModifiedFlag();
}

int CDrawPoly::GetHandleCount()
{
	return m_nPoints;
}

CPoint CDrawPoly::GetHandle(int nHandle)
{
	ASSERT_VALID(this);

	ASSERT(nHandle >= 1 && nHandle <= m_nPoints);
	return m_points[nHandle - 1];
}

HCURSOR CDrawPoly::GetHandleCursor(int )
{
	return AfxGetApp()->LoadStandardCursor(IDC_ARROW);
}

// point is in logical coordinates
void CDrawPoly::MoveHandleTo(int nHandle, CPoint point, CDrawView* pView)
{
	ASSERT_VALID(this);
	ASSERT(nHandle >= 1 && nHandle <= m_nPoints);
	if (m_points[nHandle - 1] == point)
		return;

	m_points[nHandle - 1] = point;
	RecalcBounds(pView);

	if (pView == NULL)
		Invalidate();
	else
		pView->InvalObj(this);
	m_pDocument->SetModifiedFlag();
}

// rect must be in logical coordinates
BOOL CDrawPoly::Intersects(const CRect& rect)
{
	ASSERT_VALID(this);
	CRgn rgn;
	rgn.CreatePolygonRgn(m_points, m_nPoints, ALTERNATE);
	return rgn.RectInRegion(rect);
}

CDrawObj* CDrawPoly::Clone(CDrawDoc* pDoc)
{
	ASSERT_VALID(this);

	CDrawPoly* pClone = new CDrawPoly(m_position);
	pClone->m_bPen = m_bPen;
	pClone->m_logpen = m_logpen;
	pClone->m_bBrush = m_bBrush;
	pClone->m_logbrush = m_logbrush;
	pClone->m_points = new CPoint[m_nAllocPoints];
	memcpy(pClone->m_points, m_points, sizeof(CPoint) * m_nPoints);
	pClone->m_nAllocPoints = m_nAllocPoints;
	pClone->m_nPoints = m_nPoints;
	ASSERT_VALID(pClone);

	if (pDoc != NULL)
		pDoc->Add(pClone);

	ASSERT_VALID(pClone);
	return pClone;
}

// point is in logical coordinates
void CDrawPoly::AddPoint(const CPoint& point, CDrawView* pView)
{
	ASSERT_VALID(this);
	if (m_nPoints == m_nAllocPoints)
	{
		CPoint* newPoints = new CPoint[m_nAllocPoints + 10];
		if (m_points != NULL)
		{
			memcpy(newPoints, m_points, sizeof(CPoint) * m_nAllocPoints);
			delete[] m_points;
		}
		m_points = newPoints;
		m_nAllocPoints += 10;
	}

	if (m_nPoints == 0 || m_points[m_nPoints - 1] != point)
	{
		m_points[m_nPoints++] = point;
		if (!RecalcBounds(pView))
		{
			if (pView == NULL)
				Invalidate();
			else
				pView->InvalObj(this);
		}
		m_pDocument->SetModifiedFlag();
	}
}

BOOL CDrawPoly::RecalcBounds(CDrawView* pView)
{
	ASSERT_VALID(this);

	if (m_nPoints == 0)
		return FALSE;

	CRect bounds(m_points[0], CSize(0, 0));
	for (int i = 1; i < m_nPoints; ++i)
	{
		if (m_points[i].x < bounds.left)
			bounds.left = m_points[i].x;
		if (m_points[i].x > bounds.right)
			bounds.right = m_points[i].x;
		if (m_points[i].y < bounds.top)
			bounds.top = m_points[i].y;
		if (m_points[i].y > bounds.bottom)
			bounds.bottom = m_points[i].y;
	}

	if (bounds == m_position)
		return FALSE;

	if (pView == NULL)
		Invalidate();
	else
		pView->InvalObj(this);

	m_position = bounds;

	if (pView == NULL)
		Invalidate();
	else
		pView->InvalObj(this);

	return TRUE;
}

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

IMPLEMENT_SERIAL(CDrawOleObj, CDrawObj, 0)

BOOL CDrawOleObj::c_bShowItems = TRUE;

CDrawOleObj::CDrawOleObj() : m_extent(0,0)
{
	m_pClientItem = NULL;
}

CDrawOleObj::CDrawOleObj(const CRect& position)
	: CDrawObj(position), m_extent(0, 0)
{
	m_pClientItem = NULL;
}

CDrawOleObj::~CDrawOleObj()
{
	if (m_pClientItem != NULL)
	{
		m_pClientItem->Release();
		m_pClientItem = NULL;
	}
}

void CDrawOleObj::Remove()
{
	if (m_pClientItem != NULL)
	{
		m_pClientItem->Delete();
		m_pClientItem = NULL;
	}
	CDrawObj::Remove();
}

void CDrawOleObj::Serialize( CArchive& ar )
{
	ASSERT_VALID(this);

	CDrawObj::Serialize(ar);

	if (ar.IsStoring())
	{
		ar << m_extent;
		ar << m_pClientItem;
	}
	else
	{
		ar >> m_extent;
		ar >> m_pClientItem;
		m_pClientItem->m_pDrawObj = this;
	}
}

CDrawObj* CDrawOleObj::Clone(CDrawDoc* pDoc)
{
	ASSERT_VALID(this);

	AfxGetApp()->BeginWaitCursor();

	CDrawOleObj* pClone = NULL;
	CDrawItem* pItem = NULL;
	TRY
	{
		// perform a "deep copy" -- need to copy CDrawOleObj and the CDrawItem
		//  that it points to.
		CDrawOleObj* pClone = new CDrawOleObj(m_position);
		CDrawItem* pItem = new CDrawItem(m_pDocument, pClone);
		if (!pItem->CreateCloneFrom(m_pClientItem))
			AfxThrowMemoryException();

		pClone->m_pClientItem = pItem;
		pClone->m_bPen = m_bPen;
		pClone->m_logpen = m_logpen;
		pClone->m_bBrush = m_bBrush;
		pClone->m_logbrush = m_logbrush;
		ASSERT_VALID(pClone);

		if (pDoc != NULL)
			pDoc->Add(pClone);
	}
	CATCH_ALL(e)
	{
		pItem->Delete();
		pClone->m_pClientItem = NULL;
		pClone->Remove();
		AfxGetApp()->EndWaitCursor();

		THROW_LAST();
	}
	END_CATCH_ALL

	AfxGetApp()->EndWaitCursor();
	return pClone;
}

void CDrawOleObj::Draw(CDC* pDC)
{
	ASSERT_VALID(this);

	CDrawItem* pItem = m_pClientItem;
	if (pItem != NULL)
	{
		// draw the OLE item itself
		pItem->Draw(pDC, m_position);

		// don't draw tracker in print preview or on printer
		if (!pDC->IsPrinting())
		{
			// use a CRectTracker to draw the standard effects
			CRectTracker tracker;
			tracker.m_rect = m_position;
			pDC->LPtoDP(tracker.m_rect);

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

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

void CDrawOleObj::OnOpen(CDrawView* pView)
{
	AfxGetApp()->BeginWaitCursor();
	m_pClientItem->DoVerb(
		GetKeyState(VK_CONTROL) < 0 ? OLEIVERB_OPEN : OLEIVERB_PRIMARY,
		pView);
	AfxGetApp()->EndWaitCursor();
}

void CDrawOleObj::OnEditProperties()
{
	// using COlePropertiesDialog directly means no scaling
	COlePropertiesDialog dlg(m_pClientItem, 100, 100, NULL);

	dlg.DoModal();
}

// position is in logical
void CDrawOleObj::MoveTo(const CRect& position, CDrawView* pView)
{
	ASSERT_VALID(this);

	if (position == m_position)
		return;

	// call base class to update position
	CDrawObj::MoveTo(position, pView);

	// update position of in-place editing session on position change
	if (m_pClientItem->IsInPlaceActive())
		m_pClientItem->SetItemRects();
}

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