editpadview.cpp

一个完整的编辑器的代码（很值得参考

///////////////////////////////////////////////////////////////////////////
//  File:    editpadview.cpp
//  Version: 1.3.0.6
//  Updated: 19-Jul-1998
//
//  View core
//
//  Copyright:  Ferdinand Prantl, portions by Stcherbatchenko Andrei
//  E-mail:     [e-mail]
//
//  You are free to use or modify this code to the following restrictions:
//  - Acknowledge me somewhere in your about box, simple "Parts of code by.."
//  will be enough. If you can't (or don't want to), contact me personally.
//  - LEAVE THIS HEADER INTACT
////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////
//  14-Sep-99
//  + FIX: GetFileSize stuff causing crash on file size comparings (Hans Eckardt)
////////////////////////////////////////////////////////////////////////////

// editpadview.cpp : implementation of the CEditPadView class
//

#include "stdafx.h"
#include "editpad.h"

#include "editpaddoc.h"
#include "editpadview.h"
#include "editcmd.h"
#include "generpg.h"
#include "editoroptionspage.h"
#include "fontpg.h"
#include "mainfrm.h"
#include "filesup.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CEditPadView

IMPLEMENT_DYNCREATE (CEditPadView, CCrystalEditViewEx)

BEGIN_MESSAGE_MAP (CEditPadView, CCrystalEditViewEx)
//{{AFX_MSG_MAP(CEditPadView)
ON_WM_CONTEXTMENU ()
ON_COMMAND (ID_VIEW_OPTIONS, OnViewOptions)
ON_WM_TIMER()
ON_WM_CREATE()
ON_COMMAND (ID_FILE_RELOAD, OnFileReload)
ON_UPDATE_COMMAND_UI(ID_FILE_RELOAD, OnUpdateFileReload)
//}}AFX_MSG_MAP
// Standard printing commands
//  ON_COMMAND(ID_FILE_PRINT, CCrystalEditViewEx::OnFilePrint)
//  ON_COMMAND(ID_FILE_PRINT_DIRECT, CCrystalEditViewEx::OnFilePrint)
//  ON_COMMAND(ID_FILE_PRINT_PREVIEW, CCrystalEditViewEx::OnFilePrintPreview)
END_MESSAGE_MAP ()

/////////////////////////////////////////////////////////////////////////////
// CEditPadView construction/destruction

CEditPadView::CEditPadView ()
{
  m_bRememberLastPos = (theApp.m_dwFlags & EP_REMEMBER_LASTPOS) != 0;
  m_bSingle = false;
  SetParser (&m_xParser);
}

CEditPadView:: ~ CEditPadView ()
{
}

BOOL CEditPadView::
PreCreateWindow (CREATESTRUCT & cs)
{
  // TODO: Modify the Window class or styles here by modifying
  //  the CREATESTRUCT cs

  return CCrystalEditViewEx::PreCreateWindow (cs);
}

/////////////////////////////////////////////////////////////////////////////
// CEditPadView drawing

//void CEditPadView::OnDraw(CDC* pDC)
//{
//  CEditPadDoc* pDoc = GetDocument();
//  ASSERT_VALID(pDoc);
//  // TODO: add draw code for native data here
//}

/////////////////////////////////////////////////////////////////////////////
// CEditPadView printing

//BOOL CEditPadView::OnPreparePrinting(CPrintInfo* pInfo)
//{
//  // default preparation
//  return DoPreparePrinting(pInfo);
//}
//
//void CEditPadView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
//{
//  // TODO: add extra initialization before printing
//}
//
//void CEditPadView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
//{
//  // TODO: add cleanup after printing
//}

/////////////////////////////////////////////////////////////////////////////
// CEditPadView diagnostics

#ifdef _DEBUG
void CEditPadView::
AssertValid ()
const
{
  CCrystalEditViewEx::AssertValid ();
}

void CEditPadView::Dump (CDumpContext & dc)
const
{
  CCrystalEditViewEx::Dump (dc);
}

CEditPadDoc *CEditPadView::GetDocument ()  // non-debug version is inline
{
  ASSERT (m_pDocument->IsKindOf (RUNTIME_CLASS (CEditPadDoc)));
  return (CEditPadDoc *) m_pDocument;
}
#endif //_DEBUG

CCrystalTextBuffer *CEditPadView::
LocateTextBuffer ()
{
  return &GetDocument ()->m_xTextBuffer;
}

/////////////////////////////////////////////////////////////////////////////
// CEditPadView message handlers

#pragma warning ( disable : 4100 )
void CEditPadView::
OnContextMenu (CWnd * pWnd, CPoint point)
{
  if (theApp.m_dwFlags & EP_ADVANCED_UI)
    theApp.ShowPopupMenu (IDR_CONTEXT_MENU, point, this);
  else
    {
      CMenu menu;
      if (menu.LoadMenu (IDR_EDITPADTYPE))
        {
          CMenu *pMenu = menu.GetSubMenu (1);
          if (pMenu)
            // pMenu->TrackPopupMenu (TPM_LEFTBUTTON|TPM_RIGHTBUTTON|TPM_RETURNCMD|TPM_LEFTALIGN|TPM_TOPALIGN, point.x, point.y, this);
            pMenu->TrackPopupMenu (TPM_LEFTBUTTON|TPM_RIGHTBUTTON|TPM_LEFTALIGN|TPM_TOPALIGN, point.x, point.y, this);
        }
    }
}
#pragma warning ( default : 4100 )

void CEditPadView::
OnViewOptions ()
{
  CGeneralPage pgGeneral;
  CEditorOptionsPage pgEditor (this);
  CFontPage pgFont (this);
  CString sTitle;
  sTitle.LoadString (IDS_SHEET_OPTIONS);
  CPropertySheet psOptions (sTitle, AfxGetMainWnd ());

  psOptions.AddPage (&pgGeneral);
  psOptions.AddPage (&pgEditor);
  psOptions.AddPage (&pgFont);
  psOptions.DoModal ();
}

void CEditPadView::OnActivateView(BOOL bActivate, CView* pActivateView, CView* pDeactiveView)
{
	CCrystalEditViewEx::OnActivateView(bActivate, pActivateView, pDeactiveView);
  if (GetDocument ()->IsModified ())
    {
      CString sTitle;
      CWnd *pWnd = AfxGetMainWnd ();
      pWnd->GetWindowText (sTitle);
      BOOL bMaxi;
      ((CMDIFrameWnd*) pWnd)->MDIGetActive (&bMaxi);
      if (sTitle.Left (2) != _T("* "))
        {
          sTitle = _T ("* ") + (bMaxi ? sTitle.Left (7) : sTitle);
          pWnd->SetWindowText (sTitle);
        }
      CWnd *pWnd2 = GetParentFrame ();
      if (!bMaxi)
        {
          pWnd2->GetWindowText (sTitle);
          if (sTitle.Right (2) != _T(" *"))
            {
              sTitle += _T (" *");
              pWnd2->SetWindowText (sTitle);
            }
        }
    }
  else
    {
      CString sTitle;
      CWnd *pWnd = AfxGetMainWnd ();
      pWnd->GetWindowText (sTitle);
      BOOL bMaxi;
      ((CMDIFrameWnd*) pWnd)->MDIGetActive (&bMaxi);
      if (sTitle.Left (2) == _T("* "))
        {
          sTitle = bMaxi ? sTitle.Mid (2, 7) : sTitle.Mid (2);
          pWnd->SetWindowText (sTitle);
        }
      CWnd *pWnd2 = GetParentFrame ();
      if (!bMaxi)
        {
          pWnd2->GetWindowText (sTitle);
          if (sTitle.Right (2) == _T(" *"))
            {
              sTitle = sTitle.Left (sTitle.GetLength () - 2);
              pWnd2->SetWindowText (sTitle);
            }
        }
    }
  if (bActivate)
    {
      CWnd *pWnd = AfxGetMainWnd ();
      if(pWnd->IsKindOf (RUNTIME_CLASS (CMainFrame)))
        ((CMainFrame*) pWnd)->ChooseStatusBar (TRUE);
      else
        ((CMainFrame2*) pWnd)->ChooseStatusBar (TRUE);
    }
}

int CEditPadView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CCrystalEditViewEx::OnCreate(lpCreateStruct) == -1)
		return -1;
  if (!(theApp.GetFlags () & EP_DRAG_N_DROP_EDIT))
    SetDisableDragAndDrop (TRUE);
	return 0;
}

void CEditPadView::
OnFileReload ()
{
  CEditPadDoc *pDoc = (CEditPadDoc*) GetDocument ();
  ASSERT (pDoc);
  CString sFilePath = pDoc->GetPathName ();
  if (!FileExist (sFilePath))
    {
      AfxMessageBox (_T ("File does not exist."));
      return;
    }
  if (theApp.m_dwFlags & EP_NOTIFY_CHANGES)
    {
      pDoc->StopWatching ();
      pDoc->RemoveFile (sFilePath);
    }
  bool bResult = pDoc->SaveModified () != 0;
  if (bResult)
  {
	  POSITION pos = pDoc->GetFirstViewPosition ();
    ASSERT (pos);
	  CCrystalTextView *pView;
    do
      {
	      pView = (CCrystalTextView*) pDoc->GetNextView (pos);
        pView->PushCursor ();
      }
    while (pos);
    m_pTextBuffer->FreeAll ();
    BOOL bResult = m_pTextBuffer->LoadFromFile (sFilePath);
	  // ->HE display as not modified now (LoadFromFile should do that)
	  m_pTextBuffer->SetModified (FALSE);
	  // <-HE
	  pos = pDoc->GetFirstViewPosition ();
    ASSERT (pos);
    do
      {
	      pView = (CCrystalTextView*) pDoc->GetNextView (pos);
        if (bResult)
          pView->PopCursor ();
        else
          pView->ResetView ();
        pView->Invalidate ();
      }
    while (pos);
    // pDoc->UpdateAllViews (this);
  }
  if (theApp.m_dwFlags & EP_NOTIFY_CHANGES)
    {
      pDoc->AddFile (sFilePath);
      pDoc->StartWatching ();
    }
}

// ->HE If no file saved yet, disable cmd
void CEditPadView::OnUpdateFileReload(CCmdUI* pCmdUI)
{
	CEditPadDoc *pDoc = (CEditPadDoc*) GetDocument ();
	ASSERT (pDoc);
	pCmdUI->Enable (!pDoc->GetPathName ().IsEmpty ());
}
// <-HE