padview.cpp

一个超级文本编辑器

void CPadView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
{
	// get string to show as "filename" in header/footer
	LPCTSTR pszFileName = GetDocument()->GetPathName();
	if (pszFileName[0] == 0)
		pszFileName = GetDocument()->GetTitle();

	// go thru global CPageSetupDlg to format the header and footer
	CString strHeader;
	dlgPageSetup.FormatHeader(strHeader, m_timeHeader, pszFileName,
		pInfo->m_nCurPage);
	CString strFooter;
	dlgPageSetup.FormatFooter(strFooter, m_timeFooter, pszFileName,
		pInfo->m_nCurPage);

	TEXTMETRIC tm;
	pDC->GetTextMetrics(&tm);
	int cyChar = tm.tmHeight;
	CRect rectPage = pInfo->m_rectDraw;

	// draw and exclude space for header
	if (!strHeader.IsEmpty())
	{
		pDC->TextOut(rectPage.left, rectPage.top, strHeader);
		rectPage.top += cyChar + cyChar / 4;
		pDC->MoveTo(rectPage.left, rectPage.top);
		pDC->LineTo(rectPage.right, rectPage.top);
		rectPage.top += cyChar / 4;
	}

	// allow space for footer
	pInfo->m_rectDraw = rectPage;
	if (!strFooter.IsEmpty())
		pInfo->m_rectDraw.bottom -= cyChar + cyChar/4 + cyChar/4;

	// draw body text
	CEditView::OnPrint(pDC, pInfo);

	// draw footer
	if (!strFooter.IsEmpty())
	{
		rectPage.bottom -= cyChar;
		pDC->TextOut(rectPage.left, rectPage.bottom, strFooter);
		rectPage.bottom -= cyChar / 4;
		pDC->MoveTo(rectPage.left, rectPage.bottom);
		pDC->LineTo(rectPage.right, rectPage.bottom);
		rectPage.bottom -= cyChar / 4;
	}
}

void CPadView::OnScrollTo(CDC*, CPrintInfo* pInfo, POINT)
{
	UINT nPage = pInfo->m_nCurPage;
	ASSERT(nPage < (UINT)m_aPageStart.GetSize());
	if (nPage != m_nPreviewPage)
	{
		UINT nIndex = m_aPageStart[nPage];
		GetEditCtrl().SetSel((int)nIndex, (int)nIndex);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CPadView Font Handling

void CPadView::OnChooseFont()
{
   // get current font description
   CFont* pFont = GetFont();
   LOGFONT lf;
   if (pFont != NULL)
	   pFont->GetObject(sizeof(LOGFONT), &lf);
   else
	   ::GetObject(GetStockObject(SYSTEM_FONT), sizeof(LOGFONT), &lf);

	CFontDialog dlg(&lf, CF_SCREENFONTS|CF_INITTOLOGFONTSTRUCT);
	if (dlg.DoModal() == IDOK)
	{
		// switch to new font.
		m_font.DeleteObject();
		if (m_font.CreateFontIndirect(&lf))
		{
			CWaitCursor wait;
			SetFont(&m_font);
			m_lfDefFont = lf;

			if (GetPrinterFont() == NULL)
			{
				// notify container that content has changed
				GetDocument()->UpdateAllItems(NULL);
			}
		}
	}
}

static void ScaleLogFont(LPLOGFONT plf, const CDC& dcFrom, const CDC& dcTo)
	// helper to scale log font member from one DC to another!
{
	plf->lfHeight = MulDiv(plf->lfHeight,
		dcTo.GetDeviceCaps(LOGPIXELSY), dcFrom.GetDeviceCaps(LOGPIXELSY));
	plf->lfWidth = MulDiv(plf->lfWidth,
		dcTo.GetDeviceCaps(LOGPIXELSX), dcFrom.GetDeviceCaps(LOGPIXELSX));
}

void CPadView::OnChoosePrintFont()
{
	CWaitCursor wait;
	CFont* pFont = GetPrinterFont();
	LOGFONT lf;
	LPLOGFONT plf = NULL;
	if (pFont != NULL)
	{
		pFont->GetObject(sizeof(LOGFONT), &lf);
		plf = &lf;
	}

	// magic to get printer dialog that would be used if we were printing!
	CPrintDialog dlgPrint(FALSE);
	if (!AfxGetApp()->GetPrinterDeviceDefaults(&dlgPrint.m_pd))
	{
		AfxMessageBox(IDP_ERR_GET_DEVICE_DEFAULTS);
		return;
	}
	wait.Restore();
	HDC hdcPrint = dlgPrint.CreatePrinterDC();
	if (hdcPrint == NULL)
	{
		AfxMessageBox(IDP_ERR_GET_PRINTER_DC);
		return;
	}

	CDC dcScreen;
	dcScreen.Attach(::GetDC(NULL));
	CDC dcPrint;
	dcPrint.Attach(hdcPrint);

	if (plf != NULL)
	{
		// need to map initial logfont to screen metrics.
		::ScaleLogFont(plf, dcPrint, dcScreen);
	}

	// now bring up the dialog since we know the printer DC
	CFontDialog dlg(plf, CF_PRINTERFONTS, &dcPrint);
	if (dlg.DoModal() == IDOK)
	{
		// map the resulting logfont back to printer metrics.
		lf = dlg.m_lf;
		::ScaleLogFont(&lf, dcScreen, dcPrint);

		SetPrinterFont(NULL);
		m_fontPrint.DeleteObject();
		if (m_fontPrint.CreateFontIndirect(&lf))
		{
			SetPrinterFont(&m_fontPrint);
			m_lfDefPrintFont = lf;

			// notify container that content has changed
			GetDocument()->UpdateAllItems(NULL);
		}
	}
	//NOTE: destructor will call dcPrint.DeleteDC

	::ReleaseDC(NULL, dcScreen.Detach());
}

void CPadView::OnMirrorDisplayFont()
{
	if (GetPrinterFont() != NULL)
	{
		SetPrinterFont(NULL);
		m_lfDefPrintFont.lfHeight = 0;

		// notify container that content changed
		GetDocument()->UpdateAllItems(NULL);
	}
}

void CPadView::OnUpdateChoosePrintFont(CCmdUI* pCmdUI)
{
	pCmdUI->SetCheck(GetPrinterFont() != NULL);
}

void CPadView::OnUpdateMirrorDisplayFont(CCmdUI* pCmdUI)
{
	pCmdUI->SetCheck(GetPrinterFont() == NULL);
}

/////////////////////////////////////////////////////////////////////////////
// CPadView Tab Stops

#ifndef _MAC // CEditView::SetTabStops is not supported on the MAC
void CPadView::OnSetTabStops()
{
	CSetTabStops dlg;
	dlg.m_nTabStops = m_nTabStops/4;
	if (dlg.DoModal() == IDOK)
	{
		CWaitCursor wait;
		SetTabStops(dlg.m_nTabStops*4);
		m_nDefTabStops = m_nTabStops;

		// notify container that content changed
		GetDocument()->UpdateAllItems(NULL);
	}
}
#endif 

/////////////////////////////////////////////////////////////////////////////
// CPadView Word Wrap

void CPadView::OnUpdateWordWrap(CCmdUI* pCmdUI)
{
	pCmdUI->SetCheck(IsWordWrap());
}

void CPadView::OnWordWrap()
{
	CWaitCursor wait;
	SetWordWrap(!IsWordWrap());
	m_bDefWordWrap = IsWordWrap();
}

/////////////////////////////////////////////////////////////////////////////
// CPadView commands

void CPadView::OnRButtonDown(UINT, CPoint)
{
	GetParentFrame()->BringWindowToTop();
}

void CPadView::OnSize(UINT nType, int cx, int cy)
{
	CWaitCursor wait;
	CEditView::OnSize(nType, cx, cy);

	CFrameWnd* pFrameWnd = GetParentFrame();
	ASSERT_VALID(pFrameWnd);

	if ((pFrameWnd->GetStyle() & WS_VISIBLE) &&
		pFrameWnd->IsKindOf(RUNTIME_CLASS(COleIPFrameWnd)))
	{
		// update the cx part of the extent to the width of the control
		COleServerItem* pItem = GetDocument()->GetEmbeddedItem();

		// only update if it has actually changed
		if ((int)pItem->m_sizeExtent.cx != cx)
		{
			pItem->m_sizeExtent.cx = cx;
			OnEditChange();
		}
	}
}

/////////////////////////////////////////////////////////////////////////////
// CPadView OLE support

void CPadView::OnEditChange()
{
	CEditView::OnEditChange();

	if (m_uTimerID != 0) // if outstanding timer kill it
		KillTimer(m_uTimerID);
	m_uTimerID = SetTimer(1, 200, NULL); //set a timer for 200 milliseconds
	if (m_uTimerID == 0) // no timer available so force update now
		GetDocument()->UpdateAllItems(NULL);
}

void CPadView::OnEditCopy()
{
	CWaitCursor wait;

	// get the current selection
	UINT nFrom, nTo;
	GetEditCtrl().GetSel((int&)nFrom, (int&)nTo);

	// what gets copied depends on partial vs. full selection
	if ((nFrom == 0 && nTo == (UINT)GetWindowTextLength()))
	{
		// copy entire document to the clipboard
		GetDocument()->GetEmbeddedItem()->CopyToClipboard(TRUE);
	}
	else
	{
		// copy linked item to clipboard
		CPadLinkItem item(GetDocument(), nFrom, nTo);
		item.CopyToClipboard(TRUE);
	}
}

void CPadView::OnEditCut()
{
	OnEditCopy();
	CEditView::OnEditCut();
}

void CPadView::OnTimer(UINT nIDEvent)
{
	if (m_uTimerID != nIDEvent) // not our timer
	{
		CEditView::OnTimer(nIDEvent);
		return;
	}

	KillTimer(m_uTimerID); // kill one-shot timer
	m_uTimerID = 0;
	GetDocument()->UpdateAllItems(NULL);
}

/////////////////////////////////////////////////////////////////////////////
// CPadView diagnostics

#ifdef _DEBUG
void CPadView::AssertValid() const
{
	CEditView::AssertValid();
}

void CPadView::Dump(CDumpContext& dc) const
{
	CEditView::Dump(dc);
}
#endif //_DEBUG

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