drawvw.cpp

组态软件的简化版

	rect.top = -pDoc->GetSize().cy / 2;
	rect.right = rect.left + pDoc->GetSize().cx;
	rect.bottom = rect.top + pDoc->GetSize().cy;

	// Center lines
	CPen penDash;
	penDash.CreatePen(PS_DASH, 1, m_gridColor);
	CPen* pOldPen = pDC->SelectObject(&penDash);

	pDC->MoveTo(0, rect.top);
	pDC->LineTo(0, rect.bottom);
	pDC->MoveTo(rect.left, 0);
	pDC->LineTo(rect.right, 0);

	// Major unit lines
	CPen penDot;
	penDot.CreatePen(PS_DOT, 1, m_gridColor);
	pDC->SelectObject(&penDot);

	//for (int x = rect.left / 100 * 100; x < rect.right; x += 100)
	for (int x = rect.left / 50 * 50; x < rect.right; x += 50)
	{
		if (x != 0)
		{
			pDC->MoveTo(x, rect.top);
			pDC->LineTo(x, rect.bottom);
		}
	}

	//for (int y = rect.top / 100 * 100; y < rect.bottom; y += 100)
	for (int y = rect.top / 50 * 50; y < rect.bottom; y += 50)
	{
		if (y != 0)
		{
			pDC->MoveTo(rect.left, y);
			pDC->LineTo(rect.right, y);
		}
	}

	// Outlines
	CPen penSolid;
	penSolid.CreatePen(PS_SOLID, 1, m_gridColor);
	pDC->SelectObject(&penSolid);
	pDC->MoveTo(rect.left, rect.top);
	pDC->LineTo(rect.right, rect.top);
	pDC->LineTo(rect.right, rect.bottom);
	pDC->LineTo(rect.left, rect.bottom);
	pDC->LineTo(rect.left, rect.top);

	pDC->SelectObject(pOldPen);
	pDC->SetBkColor(oldBkColor);

}
void CDrawView::SetPageSize(CSize size)
{
   	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);
	GetDocument()->UpdateAllViews(NULL, HINT_UPDATE_WINDOW, NULL);

}


void CDrawView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo) 
{
 	CScrollView::OnPrepareDC(pDC, pInfo);
	// mapping mode is MM_ANISOTROPIC
	// these extents setup a mode similar to MM_LOENGLISH
	// MM_LOENGLISH is in .01 physical inches
	// these extents provide .01 logical inches
	pDC->SetMapMode(MM_ANISOTROPIC);
	pDC->SetViewportExt(pDC->GetDeviceCaps(LOGPIXELSX),
		pDC->GetDeviceCaps(LOGPIXELSY));
	pDC->SetWindowExt(100, -100);

	// set the origin of the coordinate system to the center of the page
	CPoint ptOrg;
	ptOrg.x = GetDocument()->GetSize().cx / 2;
	ptOrg.y = GetDocument()->GetSize().cy / 2;

	// ptOrg is in logical coordinates
	pDC->OffsetWindowOrg(-ptOrg.x,ptOrg.y);
}

CRect CDrawView::GetInitialPosition()
{
	CRect rect(10, 10, 10, 10);
	ClientToDoc(rect);
	return rect;
}

//用来显示所画图形
void CDrawView::OnActivateView(BOOL bActivate,CView* pActiveView,CView* pDeactiveView)
{
	CView::OnActivateView(bActivate, pActiveView, pDeactiveView);

	// invalidate selections when active status changes
	if (m_bActive != bActivate)
	{
		if (bActivate)  // if becoming active update as if active
			m_bActive = bActivate;
		if (!m_selection.IsEmpty())
			OnUpdate(NULL, HINT_UPDATE_SELECTION, NULL);
		m_bActive = bActivate;
	}
}

void CDrawView::OnDrawCircle() 
{
	CDrawTool::c_drawShape = circle;	
}

void CDrawView::OnDrawEllipse() 
{
	CDrawTool::c_drawShape = ellipse;
}

void CDrawView::OnDrawLine() 
{
	CDrawTool::c_drawShape = line;
	
}

void CDrawView::OnDrawRoundrect() 
{
	CDrawTool::c_drawShape = roundRect;
}

void CDrawView::OnEditProperties() 
{
	if (m_selection.GetCount() == 1 && CDrawTool::c_drawShape == selection)
	{
		CDrawTool* pTool = CDrawTool::FindTool(CDrawTool::c_drawShape);
		ASSERT(pTool != NULL);
		pTool->OnEditProperties(this);
	}
}

void CDrawView::OnObjectMoveback() 
{
	CDrawDoc* pDoc = GetDocument();
	CDrawObj* pObj = m_selection.GetHead();
	CDrawObjList* pObjects = pDoc->GetObjects();
	POSITION pos = pObjects->Find(pObj);
	ASSERT(pos != NULL);
	if (pos != pObjects->GetHeadPosition())
	{
		POSITION posPrev = pos;
		pObjects->GetPrev(posPrev);
		pObjects->RemoveAt(pos);
		pObjects->InsertBefore(posPrev, pObj);
		InvalObj(pObj);
	}
	
}

void CDrawView::OnObjectMoveforward() 
{
	CDrawDoc* pDoc = GetDocument();
	CDrawObj* pObj = m_selection.GetHead();
	CDrawObjList* pObjects = pDoc->GetObjects();
	POSITION pos = pObjects->Find(pObj);
	ASSERT(pos != NULL);
	if (pos != pObjects->GetTailPosition())
	{
		POSITION posNext = pos;
		pObjects->GetNext(posNext);
		pObjects->RemoveAt(pos);
		pObjects->InsertAfter(posNext, pObj);
		InvalObj(pObj);
	}
	
}

void CDrawView::OnObjectMovetoback() 
{
	CDrawDoc* pDoc = GetDocument();
	CDrawObj* pObj = m_selection.GetHead();
	CDrawObjList* pObjects = pDoc->GetObjects();
	POSITION pos = pObjects->Find(pObj);
	ASSERT(pos != NULL);
	pObjects->RemoveAt(pos);
	pObjects->AddHead(pObj);
	InvalObj(pObj);
	
}

void CDrawView::OnObjectMovetofront() 
{
	CDrawDoc* pDoc = GetDocument();
	CDrawObj* pObj = m_selection.GetHead();
	CDrawObjList* pObjects = pDoc->GetObjects();
	POSITION pos = pObjects->Find(pObj);
	ASSERT(pos != NULL);
	pObjects->RemoveAt(pos);
	pObjects->AddTail(pObj);
	InvalObj(pObj);
	
}

void CDrawView::OnUpdateObjectMoveback(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnUpdateObjectMoveforward(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnUpdateObjectMovetoback(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnUpdateObjectMovetofront(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnObjectFillcolor() 
{
	CColorDialog dlg;
	if (dlg.DoModal() != IDOK)
		return;

	COLORREF color = dlg.GetColor();

	POSITION pos = m_selection.GetHeadPosition();
	while (pos != NULL)
	{
		CDrawObj* pObj = m_selection.GetNext(pos);
		pObj->SetFillColor(color);
	}
	
}

void CDrawView::OnObjectLinecolor() 
{
	CColorDialog dlg;
	if (dlg.DoModal() != IDOK)
		return;

	COLORREF color = dlg.GetColor();

	POSITION pos = m_selection.GetHeadPosition();
	while (pos != NULL)
	{
		CDrawObj* pObj = m_selection.GetNext(pos);
		pObj->SetLineColor(color);
	}	
}

void CDrawView::OnUpdateObjectFillcolor(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnUpdateObjectLinecolor(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_selection.GetCount() == 1);
	
}

void CDrawView::OnViewGrid() 
{
	m_bGrid = !m_bGrid;
	Invalidate(FALSE);
	
}

void CDrawView::OnUpdateViewGrid(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_bGrid);
	
}

void CDrawView::OnViewShowobjects() 
{
	CDrawOleObj::c_bShowItems = !CDrawOleObj::c_bShowItems;
	GetDocument()->UpdateAllViews(NULL, HINT_UPDATE_OLE_ITEMS, NULL);
	
}

void CDrawView::OnUpdateViewShowobjects(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(CDrawOleObj::c_bShowItems);
	
}

void CDrawView::OnEditClear() 
{
	GetDocument()->UpdateAllViews(NULL, HINT_DELETE_SELECTION, &m_selection);
	OnUpdate(NULL, HINT_UPDATE_SELECTION, NULL);

	// now remove the selection from the document
	POSITION pos = m_selection.GetHeadPosition();
	while (pos != NULL)
	{
		CDrawObj* pObj = m_selection.GetNext(pos);
		GetDocument()->Remove(pObj);
		pObj->Remove();
	}
	m_selection.RemoveAll();
	
}

void CDrawView::OnEditCopy() 
{
	ASSERT_VALID(this);
	ASSERT(m_cfDraw != NULL);

	// Create a shared file and associate a CArchive with it
	CSharedFile file;
	CArchive ar(&file, CArchive::store);

	// Serialize selected objects to the archive
	m_selection.Serialize(ar);
	ar.Close();

	COleDataSource* pDataSource = NULL;
	TRY
	{
		pDataSource = new COleDataSource;
		// put on local format instead of or in addation to
		pDataSource->CacheGlobalData(m_cfDraw, file.Detach());

		// if only one item and it is a COleClientItem then also
		// paste in that format
		CDrawObj* pDrawObj = m_selection.GetHead();
		if (m_selection.GetCount() == 1 &&
			pDrawObj->IsKindOf(RUNTIME_CLASS(CDrawOleObj)))
		{
			CDrawOleObj* pDrawOle = (CDrawOleObj*)pDrawObj;
			pDrawOle->m_pClientItem->GetClipboardData(pDataSource, FALSE);
		}
		pDataSource->SetClipboard();
	}
	CATCH_ALL(e)
	{
		delete pDataSource;
		THROW_LAST();
	}
	END_CATCH_ALL
	
}

void CDrawView::OnEditCut() 
{
	OnEditCopy();
	OnEditClear();
	
}

void CDrawView::OnEditPaste() 
{
	COleDataObject dataObject;
	dataObject.AttachClipboard();

	// invalidate current selection since it will be deselected
	OnUpdate(NULL, HINT_UPDATE_SELECTION, NULL);
	m_selection.RemoveAll();
	if (dataObject.IsDataAvailable(m_cfDraw))
	{
		PasteNative(dataObject);

		// now add all items in m_selection to document
		POSITION pos = m_selection.GetHeadPosition();
		while (pos != NULL)
			GetDocument()->Add(m_selection.GetNext(pos));
	}
	else
		PasteEmbedded(dataObject, GetInitialPosition().TopLeft() );

	GetDocument()->SetModifiedFlag();

	// invalidate new pasted stuff
	GetDocument()->UpdateAllViews(NULL, HINT_UPDATE_SELECTION, &m_selection);
	
}

void CDrawView::OnEditSelectAll() 
{
	CDrawObjList* pObList = GetDocument()->GetObjects();
	POSITION pos = pObList->GetHeadPosition();
	while (pos != NULL)
		Select(pObList->GetNext(pos), TRUE);
	
}
void CDrawView::PasteNative(COleDataObject& dataObject)
{
	// get file refering to clipboard data
	CFile* pFile = dataObject.GetFileData(m_cfDraw);
	if (pFile == NULL)
		return;

	// connect the file to the archive
	CArchive ar(pFile, CArchive::load);
	TRY
	{
		ar.m_pDocument = GetDocument(); // set back-pointer in archive

		// read the selection
		m_selection.Serialize(ar);
	}
	CATCH_ALL(e)
	{
		ar.Close();
		delete pFile;
		THROW_LAST();
	}
	END_CATCH_ALL

	ar.Close();
	delete pFile;
}

void CDrawView::PasteEmbedded(COleDataObject& dataObject, CPoint point)
{
	BeginWaitCursor();

	// paste embedded
	CDrawOleObj* pObj = new CDrawOleObj(GetInitialPosition());
	ASSERT_VALID(pObj);
	CDrawItem* pItem = new CDrawItem(GetDocument(), pObj);
	ASSERT_VALID(pItem);
	pObj->m_pClientItem = pItem;

	TRY
	{
		if (!pItem->CreateFromData(&dataObject) &&
			!pItem->CreateStaticFromData(&dataObject))
		{
			AfxThrowMemoryException();      // any exception will do
		}

		// add the object to the document
		GetDocument()->Add(pObj);
		m_selection.AddTail(pObj);
		ClientToDoc( point );
		pObj->MoveTo( CRect( point, pObj->m_extent ), this );

		// try to get initial presentation data
		pItem->UpdateLink();
		pItem->UpdateExtent();
	}
	CATCH_ALL(e)
	{
		// clean up item
		pItem->Delete();
		pObj->m_pClientItem = NULL;
		GetDocument()->Remove(pObj);
		pObj->Remove();

		AfxMessageBox(IDP_FAILED_TO_CREATE);
	}
	END_CATCH_ALL

	EndWaitCursor();
}

void CDrawView::OnUpdateEditClear(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(!m_selection.IsEmpty());
	
}

void CDrawView::OnUpdateEditCopy(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(!m_selection.IsEmpty());
	
}

void CDrawView::OnUpdateEditCut(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(!m_selection.IsEmpty());
	
}

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

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

void CDrawView::OnUpdateEditSelectAll(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(GetDocument()->GetObjects()->GetCount() != 0);
	
}
void CDrawView::OnUpdate(CView* , LPARAM lHint, CObject* pHint)
{

	switch (lHint)
	{
	case HINT_UPDATE_WINDOW:    // redraw entire window
		Invalidate(FALSE);
		break;

	case HINT_UPDATE_DRAWOBJ:   // a single object has changed
		InvalObj((CDrawObj*)pHint);
		break;

	case HINT_UPDATE_SELECTION: // an entire selection has changed
		{
			CDrawObjList* pList = pHint != NULL ?
				(CDrawObjList*)pHint : &m_selection;
			POSITION pos = pList->GetHeadPosition();
			while (pos != NULL)
				InvalObj(pList->GetNext(pos));
		}
		break;

	case HINT_DELETE_SELECTION: // an entire selection has been removed
		if (pHint != &m_selection)
		{
			CDrawObjList* pList = (CDrawObjList*)pHint;
			POSITION pos = pList->GetHeadPosition();
			while (pos != NULL)
			{
				CDrawObj* pObj = pList->GetNext(pos);
				InvalObj(pObj);
				Remove(pObj);   // remove it from this view's selection
			}
		}
		break;

	case HINT_UPDATE_OLE_ITEMS:
		{
			CDrawDoc* pDoc = GetDocument();
			POSITION pos = pDoc->GetObjects()->GetHeadPosition();
			while (pos != NULL)
			{
				CDrawObj* pObj = pDoc->GetObjects()->GetNext(pos);
				if (pObj->IsKindOf(RUNTIME_CLASS(CDrawOleObj)))
					InvalObj(pObj);
			}
		}
		break;

	default:
		ASSERT(FALSE);
		break;
	}

}