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DIBVIEW.CPP
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C/C++ Source or Header
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1993-06-01
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6KB
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232 lines
// dibview.cpp : implementation of the CDibView class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp and/or WinHelp 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(pAppFrame->IsKindOf(RUNTIME_CLASS( CMainFrame )));
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::OnPaletteChanged\n");
}
}
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));
}