Action History - Undo and Redo

// UndoRedoView.h : interface of the CUndoRedoView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_UNDOREDOVIEW_H__BB2CC71D_AA77_4519_ABBE_0D15B7C57BE5__INCLUDED_)
#define AFX_UNDOREDOVIEW_H__BB2CC71D_AA77_4519_ABBE_0D15B7C57BE5__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CUndoRedoView : public CView
{
protected: // create from serialization only
	CUndoRedoView();
	DECLARE_DYNCREATE(CUndoRedoView)

// Attributes
public:
	CUndoRedoDoc* GetDocument();

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CUndoRedoView)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	//}}AFX_VIRTUAL

// Implementation
public:
	void DrawDragBox(CDC* pDC, bool bErase = false);
	void DrawUserInfo(CDC* pDC);

	virtual ~CUndoRedoView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
	//{{AFX_MSG(CUndoRedoView)
	afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()

private:
	CRect m_rtBox;			// stores the coordinates of the box on-screen
	CPoint m_ptOldMouse;	// stores the anchor position
	bool bDragBox;			// is the user dragging the box
};

#ifndef _DEBUG  // debug version in UndoRedoView.cpp
inline CUndoRedoDoc* CUndoRedoView::GetDocument()
   { return (CUndoRedoDoc*)m_pDocument; }
#endif

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

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_UNDOREDOVIEW_H__BB2CC71D_AA77_4519_ABBE_0D15B7C57BE5__INCLUDED_)