scribvw.cpp
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上传用户:biuytresa
上传日期:2007-12-07
资源大小:721k
文件大小:11k
源码类别:
DNA
开发平台:
Visual C++
- // ScribVw.cpp : implementation of the CScribbleView 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 "Scribble.h"
- #include "ScribDoc.h"
- #include "ScribVw.h"
- #ifdef _DEBUG
- #define new DEBUG_NEW
- #undef THIS_FILE
- static char THIS_FILE[] = __FILE__;
- #endif
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView
- IMPLEMENT_DYNCREATE(CScribbleView, CScrollView)
- BEGIN_MESSAGE_MAP(CScribbleView, CScrollView)
- //{{AFX_MSG_MAP(CScribbleView)
- ON_WM_LBUTTONDOWN()
- ON_WM_LBUTTONUP()
- ON_WM_MOUSEMOVE()
- ON_COMMAND(ID_CANCEL_EDIT_SRVR, OnCancelEditSrvr)
- ON_WM_SIZE()
- //}}AFX_MSG_MAP
- // Standard printing commands
- ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
- ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
- ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
- END_MESSAGE_MAP()
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView construction/destruction
- CScribbleView::CScribbleView()
- {
- SetScrollSizes(MM_TEXT, CSize(0, 0));
- }
- CScribbleView::~CScribbleView()
- {
- }
- BOOL CScribbleView::PreCreateWindow(CREATESTRUCT& cs)
- {
- // TODO: Modify the Window class or styles here by modifying
- // the CREATESTRUCT cs
- return CView::PreCreateWindow(cs);
- }
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView drawing
- void CScribbleView::OnDraw(CDC* pDC)
- {
- CScribbleDoc* pDoc = GetDocument();
- ASSERT_VALID(pDoc);
- // Get the invalidated rectangle of the view, or in the case
- // of printing, the clipping region of the printer dc.
- CRect rectClip;
- CRect rectStroke;
- pDC->GetClipBox(&rectClip);
- pDC->LPtoDP(&rectClip);
- rectClip.InflateRect(1, 1); // avoid rounding to nothing
- // Note: CScrollView::OnPaint() will have already adjusted the
- // viewport origin before calling OnDraw(), to reflect the
- // currently scrolled position.
- // The view delegates the drawing of individual strokes to
- // CStroke::DrawStroke().
- CTypedPtrList<CObList,CStroke*>& strokeList = pDoc->m_strokeList;
- POSITION pos = strokeList.GetHeadPosition();
- while (pos != NULL)
- {
- CStroke* pStroke = strokeList.GetNext(pos);
- rectStroke = pStroke->GetBoundingRect();
- pDC->LPtoDP(&rectStroke);
- rectStroke.InflateRect(1, 1); // avoid rounding to nothing
- if (!rectStroke.IntersectRect(&rectStroke, &rectClip))
- continue;
- pStroke->DrawStroke(pDC);
- }
- }
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView printing
- BOOL CScribbleView::OnPreparePrinting(CPrintInfo* pInfo)
- {
- pInfo->SetMaxPage(2); // the document is two pages long:
- // the first page is the title page
- // the second is the drawing
- BOOL bRet = DoPreparePrinting(pInfo); // default preparation
- pInfo->m_nNumPreviewPages = 2; // Preview 2 pages at a time
- // Set this value after calling DoPreparePrinting to override
- // value read from .INI file
- return bRet;
- }
- void CScribbleView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
- {
- // TODO: add extra initialization before printing
- }
- void CScribbleView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
- {
- // TODO: add cleanup after printing
- }
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView diagnostics
- #ifdef _DEBUG
- void CScribbleView::AssertValid() const
- {
- CScrollView::AssertValid();
- }
- void CScribbleView::Dump(CDumpContext& dc) const
- {
- CScrollView::Dump(dc);
- }
- CScribbleDoc* CScribbleView::GetDocument() // non-debug version is inline
- {
- ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CScribbleDoc)));
- return (CScribbleDoc*)m_pDocument;
- }
- #endif //_DEBUG
- /////////////////////////////////////////////////////////////////////////////
- // CScribbleView message handlers
- void CScribbleView::OnLButtonDown(UINT, CPoint point)
- {
- // Pressing the mouse button in the view window starts a new stroke
- // CScrollView changes the viewport origin and mapping mode.
- // It's necessary to convert the point from device coordinates
- // to logical coordinates, such as are stored in the document.
- CClientDC dc(this);
- OnPrepareDC(&dc);
- dc.DPtoLP(&point);
- m_pStrokeCur = GetDocument()->NewStroke();
- // Add first point to the new stroke
- m_pStrokeCur->m_pointArray.Add(point);
- SetCapture(); // Capture the mouse until button up.
- m_ptPrev = point; // Serves as the MoveTo() anchor point for the
- // LineTo() the next point, as the user drags the
- // mouse.
- return;
- }
- void CScribbleView::OnLButtonUp(UINT, CPoint point)
- {
- // Mouse button up is interesting in the Scribble application
- // only if the user is currently drawing a new stroke by dragging
- // the captured mouse.
- if (GetCapture() != this)
- return; // If this window (view) didn't capture the mouse,
- // then the user isn't drawing in this window.
- CScribbleDoc* pDoc = GetDocument();
- CClientDC dc(this);
- // CScrollView changes the viewport origin and mapping mode.
- // It's necessary to convert the point from device coordinates
- // to logical coordinates, such as are stored in the document.
- OnPrepareDC(&dc); // set up mapping mode and viewport origin
- dc.DPtoLP(&point);
- CPen* pOldPen = dc.SelectObject(pDoc->GetCurrentPen());
- dc.MoveTo(m_ptPrev);
- dc.LineTo(point);
- dc.SelectObject(pOldPen);
- m_pStrokeCur->m_pointArray.Add(point);
- // Tell the stroke item that we're done adding points to it.
- // This is so it can finish computing its bounding rectangle.
- m_pStrokeCur->FinishStroke();
- // Tell the other views that this stroke has been added
- // so that they can invalidate this stroke's area in their
- // client area.
- pDoc->UpdateAllViews(this, 0L, m_pStrokeCur);
- ReleaseCapture(); // Release the mouse capture established at
- // the beginning of the mouse drag.
- pDoc->NotifyChanged();
- return;
- }
- void CScribbleView::OnMouseMove(UINT, CPoint point)
- {
- // Mouse movement is interesting in the Scribble application
- // only if the user is currently drawing a new stroke by dragging
- // the captured mouse.
- if (GetCapture() != this)
- return; // If this window (view) didn't capture the mouse,
- // then the user isn't drawing in this window.
- CClientDC dc(this);
- // CScrollView changes the viewport origin and mapping mode.
- // It's necessary to convert the point from device coordinates
- // to logical coordinates, such as are stored in the document.
- OnPrepareDC(&dc);
- dc.DPtoLP(&point);
- m_pStrokeCur->m_pointArray.Add(point);
- // Draw a line from the previous detected point in the mouse
- // drag to the current point.
- CPen* pOldPen = dc.SelectObject(GetDocument()->GetCurrentPen());
- dc.MoveTo(m_ptPrev);
- dc.LineTo(point);
- dc.SelectObject(pOldPen);
- m_ptPrev = point;
- return;
- }
- void CScribbleView::OnUpdate(CView* /* pSender */, LPARAM /* lHint */,
- CObject* pHint)
- {
- // The document has informed this view that some data has changed.
- if (pHint != NULL)
- {
- if (pHint->IsKindOf(RUNTIME_CLASS(CStroke)))
- {
- // The hint is that a stroke as been added (or changed).
- // So, invalidate its rectangle.
- CStroke* pStroke = (CStroke*)pHint;
- CClientDC dc(this);
- OnPrepareDC(&dc);
- CRect rectInvalid = pStroke->GetBoundingRect();
- dc.LPtoDP(&rectInvalid);
- InvalidateRect(&rectInvalid);
- return;
- }
- }
- // We can't interpret the hint, so assume that anything might
- // have been updated.
- Invalidate(TRUE);
- return;
- }
- void CScribbleView::OnInitialUpdate()
- {
- ResyncScrollSizes();
- CScrollView::OnInitialUpdate();
- }
- void CScribbleView::ResyncScrollSizes()
- {
- CClientDC dc(NULL);
- OnPrepareDC(&dc);
- CSize sizeDoc = GetDocument()->GetDocSize();
- dc.LPtoDP(&sizeDoc);
- SetScrollSizes(MM_TEXT, sizeDoc);
- }
- void CScribbleView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
- {
- if (pInfo->m_nCurPage == 1) // page no. 1 is the title page
- {
- PrintTitlePage(pDC, pInfo);
- return; // nothing else to print on page 1 but the page title
- }
- CString strHeader = GetDocument()->GetTitle();
- PrintPageHeader(pDC, pInfo, strHeader);
- // PrintPageHeader() subtracts out from the pInfo->m_rectDraw the
- // amount of the page used for the header.
- pDC->SetWindowOrg(pInfo->m_rectDraw.left,-pInfo->m_rectDraw.top);
- // Now print the rest of the page
- OnDraw(pDC);
- }
- void CScribbleView::PrintTitlePage(CDC* pDC, CPrintInfo* pInfo)
- {
- // Prepare a font size for displaying the file name
- LOGFONT logFont;
- memset(&logFont, 0, sizeof(LOGFONT));
- logFont.lfHeight = 75; // 3/4th inch high in MM_LOENGLISH
- // (1/100th inch)
- CFont font;
- CFont* pOldFont = NULL;
- if (font.CreateFontIndirect(&logFont))
- pOldFont = pDC->SelectObject(&font);
- // Get the file name, to be displayed on title page
- CString strPageTitle = GetDocument()->GetTitle();
- // Display the file name 1 inch below top of the page,
- // centered horizontally
- pDC->SetTextAlign(TA_CENTER);
- pDC->TextOut(pInfo->m_rectDraw.right/2, -100, strPageTitle);
- if (pOldFont != NULL)
- pDC->SelectObject(pOldFont);
- }
- void CScribbleView::PrintPageHeader(CDC* pDC, CPrintInfo* pInfo,
- CString& strHeader)
- {
- // Print a page header consisting of the name of
- // the document and a horizontal line
- pDC->SetTextAlign(TA_LEFT);
- pDC->TextOut(0,-25, strHeader); // 1/4 inch down
- // Draw a line across the page, below the header
- TEXTMETRIC textMetric;
- pDC->GetTextMetrics(&textMetric);
- int y = -35 - textMetric.tmHeight; // line 1/10th inch below text
- pDC->MoveTo(0, y); // from left margin
- pDC->LineTo(pInfo->m_rectDraw.right, y); // to right margin
- // Subtract out from the drawing rectange the space used by the header.
- y -= 25; // space 1/4 inch below (top of) line
- pInfo->m_rectDraw.top += y;
- }
- // The following command handler provides the standard keyboard
- // user interface to cancel an in-place editing session. Here,
- // the server (not the container) causes the deactivation.
- void CScribbleView::OnCancelEditSrvr()
- {
- GetDocument()->OnDeactivateUI(FALSE);
- }
- void CScribbleView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
- {
- CScribbleDoc* pDoc = GetDocument();
- CScrollView::OnPrepareDC(pDC, pInfo);
- pDC->SetMapMode(MM_ANISOTROPIC);
- CSize sizeDoc = pDoc->GetDocSize();
- sizeDoc.cy = -sizeDoc.cy;
- pDC->SetWindowExt(sizeDoc);
- CSize sizeNum, sizeDenom;
- pDoc->GetZoomFactor(&sizeNum, &sizeDenom);
- int xLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSX);
- int yLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSY);
- long xExt = (long)sizeDoc.cx * xLogPixPerInch * sizeNum.cx;
- xExt /= 100 * (long)sizeDenom.cx;
- long yExt = (long)sizeDoc.cy * yLogPixPerInch * sizeNum.cy;
- yExt /= 100 * (long)sizeDenom.cy;
- pDC->SetViewportExt((int)xExt, (int)-yExt);
- }
- void CScribbleView::OnSize(UINT nType, int cx, int cy)
- {
- ResyncScrollSizes(); // ensure that scroll info is up-to-date
- CScrollView::OnSize(nType, cx, cy);
- }