testundoview.cpp

实现撤销和恢复功能得远吗

// TestUndoView.cpp : implementation of the CTestUndoView class
//

#include "stdafx.h"
#include "TestUndo.h"

#include "TestUndoDoc.h"
#include "TestUndoView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView

IMPLEMENT_DYNCREATE(CTestUndoView, CView)

BEGIN_MESSAGE_MAP(CTestUndoView, CView)
	//{{AFX_MSG_MAP(CTestUndoView)
	ON_WM_LBUTTONDOWN()
	ON_COMMAND(ID_EDIT_UNDO, OnEditUndo)
	ON_WM_RBUTTONDOWN()
	ON_COMMAND(ID_EDIT_REDO, OnEditRedo)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView construction/destruction

CTestUndoView::CTestUndoView()
{
	// TODO: add construction code here

}

CTestUndoView::~CTestUndoView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView drawing

void CTestUndoView::OnDraw(CDC* pDC)
{
	CTestUndoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CMyObjCollection* pObjs = &pDoc->m_objects;
	for (int i = 0; i < pObjs->getCount(); i++)
		pObjs->getItem(i)->Draw(pDC);
}

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView printing

BOOL CTestUndoView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CTestUndoView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CTestUndoView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView diagnostics

#ifdef _DEBUG
void CTestUndoView::AssertValid() const
{
	CView::AssertValid();
}

void CTestUndoView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CTestUndoView message handlers

void CTestUndoView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CTestUndoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	pDoc->AddMyObject( point );

	Invalidate( );
	
	CView::OnLButtonDown(nFlags, point);
}

void CTestUndoView::OnEditUndo() 
{
	CTestUndoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	pDoc->m_undoManager.Undo();
	
	Invalidate();
}

void CTestUndoView::OnRButtonDown(UINT nFlags, CPoint point) 
{
	CTestUndoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	int nCount = pDoc->m_objects.getCount();
	for( int i = 0; i < nCount; i ++ )
	{
		CMyObject * pObj = pDoc->m_objects.getItem(i);
		if( pObj->GetObjRect().PtInRect(point) )
		{
			CRect rect = pObj->GetObjRect();
			rect.right += 10;
			rect.bottom += 10;
			pDoc->ModObj( rect, pObj );
			break;
		}
	}
	Invalidate();
	
	CView::OnRButtonDown(nFlags, point);
}

void CTestUndoView::OnEditRedo() 
{
	CTestUndoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	pDoc->m_undoManager.Redo();

	Invalidate();
}