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DIBVIEW.CPP
Package: MSDN_VC98.zip [view]
Upload User: bangxh
Upload Date: 2007-01-31
Package Size: 42235k
Code Size: 6k
Category:
Windows Develop
Development Platform:
Visual C++
- // dibview.cpp : implementation of the CDibView 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 "diblook.h"
- #include "dibdoc.h"
- #include "dibview.h"
- #include "dibapi.h"
- #include "mainfrm.h"
- #ifdef _DEBUG
- #undef THIS_FILE
- static char BASED_CODE THIS_FILE[] = __FILE__;
- #endif
- /////////////////////////////////////////////////////////////////////////////
- // CDibView
- IMPLEMENT_DYNCREATE(CDibView, CScrollView)
- BEGIN_MESSAGE_MAP(CDibView, CScrollView)
- //{{AFX_MSG_MAP(CDibView)
- ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
- ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditCopy)
- ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
- ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
- ON_MESSAGE(WM_DOREALIZE, OnDoRealize)
- //}}AFX_MSG_MAP
- // Standard printing commands
- ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
- ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
- END_MESSAGE_MAP()
- /////////////////////////////////////////////////////////////////////////////
- // CDibView construction/destruction
- CDibView::CDibView()
- {
- }
- CDibView::~CDibView()
- {
- }
- /////////////////////////////////////////////////////////////////////////////
- // CDibView drawing
- void CDibView::OnDraw(CDC* pDC)
- {
- CDibDoc* pDoc = GetDocument();
- HDIB hDIB = pDoc->GetHDIB();
- if (hDIB != NULL)
- {
- LPSTR lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) hDIB);
- int cxDIB = (int) ::DIBWidth(lpDIB); // Size of DIB - x
- int cyDIB = (int) ::DIBHeight(lpDIB); // Size of DIB - y
- ::GlobalUnlock((HGLOBAL) hDIB);
- CRect rcDIB;
- rcDIB.top = rcDIB.left = 0;
- rcDIB.right = cxDIB;
- rcDIB.bottom = cyDIB;
- CRect rcDest;
- if (pDC->IsPrinting()) // printer DC
- {
- // get size of printer page (in pixels)
- int cxPage = pDC->GetDeviceCaps(HORZRES);
- int cyPage = pDC->GetDeviceCaps(VERTRES);
- // get printer pixels per inch
- int cxInch = pDC->GetDeviceCaps(LOGPIXELSX);
- int cyInch = pDC->GetDeviceCaps(LOGPIXELSY);
- //
- // Best Fit case -- create a rectangle which preserves
- // the DIB's aspect ratio, and fills the page horizontally.
- //
- // The formula in the "->bottom" field below calculates the Y
- // position of the printed bitmap, based on the size of the
- // bitmap, the width of the page, and the relative size of
- // a printed pixel (cyInch / cxInch).
- //
- rcDest.top = rcDest.left = 0;
- rcDest.bottom = (int)(((double)cyDIB * cxPage * cyInch)
- / ((double)cxDIB * cxInch));
- rcDest.right = cxPage;
- }
- else // not printer DC
- {
- rcDest = rcDIB;
- }
- ::PaintDIB(pDC->m_hDC, &rcDest, pDoc->GetHDIB(),
- &rcDIB, pDoc->GetDocPalette());
- }
- }
- /////////////////////////////////////////////////////////////////////////////
- // CDibView printing
- BOOL CDibView::OnPreparePrinting(CPrintInfo* pInfo)
- {
- // default preparation
- return DoPreparePrinting(pInfo);
- }
- /////////////////////////////////////////////////////////////////////////////
- // CDibView commands
- LRESULT CDibView::OnDoRealize(WPARAM wParam, LPARAM)
- {
- ASSERT(wParam != NULL);
- CDibDoc* pDoc = GetDocument();
- if (pDoc->GetHDIB() == NULL)
- return 0L; // must be a new document
- CPalette* pPal = pDoc->GetDocPalette();
- if (pPal != NULL)
- {
- CMainFrame* pAppFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd;
- ASSERT_KINDOF(CMainFrame, pAppFrame);
- CClientDC appDC(pAppFrame);
- // All views but one should be a background palette.
- // wParam contains a handle to the active view, so the SelectPalette
- // bForceBackground flag is FALSE only if wParam == m_hWnd (this view)
- CPalette* oldPalette = appDC.SelectPalette(pPal, ((HWND)wParam) != m_hWnd);
- if (oldPalette != NULL)
- {
- UINT nColorsChanged = appDC.RealizePalette();
- if (nColorsChanged > 0)
- pDoc->UpdateAllViews(NULL);
- appDC.SelectPalette(oldPalette, TRUE);
- }
- else
- {
- TRACE0("tSelectPalette failed in CDibView::OnPaletteChangedn");
- }
- }
- return 0L;
- }
- void CDibView::OnInitialUpdate()
- {
- CScrollView::OnInitialUpdate();
- ASSERT(GetDocument() != NULL);
- SetScrollSizes(MM_TEXT, GetDocument()->GetDocSize());
- }
- void CDibView::OnActivateView(BOOL bActivate, CView* pActivateView,
- CView* pDeactiveView)
- {
- CScrollView::OnActivateView(bActivate, pActivateView, pDeactiveView);
- if (bActivate)
- {
- ASSERT(pActivateView == this);
- OnDoRealize((WPARAM)m_hWnd, 0); // same as SendMessage(WM_DOREALIZE);
- }
- }
- void CDibView::OnEditCopy()
- {
- CDibDoc* pDoc = GetDocument();
- // Clean clipboard of contents, and copy the DIB.
- if (OpenClipboard())
- {
- BeginWaitCursor();
- EmptyClipboard();
- SetClipboardData (CF_DIB, CopyHandle((HANDLE) pDoc->GetHDIB()) );
- CloseClipboard();
- EndWaitCursor();
- }
- }
- void CDibView::OnUpdateEditCopy(CCmdUI* pCmdUI)
- {
- pCmdUI->Enable(GetDocument()->GetHDIB() != NULL);
- }
- void CDibView::OnEditPaste()
- {
- HDIB hNewDIB = NULL;
- if (OpenClipboard())
- {
- BeginWaitCursor();
- hNewDIB = (HDIB) CopyHandle(::GetClipboardData(CF_DIB));
- CloseClipboard();
- if (hNewDIB != NULL)
- {
- CDibDoc* pDoc = GetDocument();
- pDoc->ReplaceHDIB(hNewDIB); // and free the old DIB
- pDoc->InitDIBData(); // set up new size & palette
- pDoc->SetModifiedFlag(TRUE);
- SetScrollSizes(MM_TEXT, pDoc->GetDocSize());
- OnDoRealize((WPARAM)m_hWnd,0); // realize the new palette
- pDoc->UpdateAllViews(NULL);
- }
- EndWaitCursor();
- }
- }
- void CDibView::OnUpdateEditPaste(CCmdUI* pCmdUI)
- {
- pCmdUI->Enable(::IsClipboardFormatAvailable(CF_DIB));
- }