drawview.h

交互式画图的应用例子! 希望可以供大家学习

// DrawView.h : interface of the CDrawView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_DRAWVIEW_H__4EF21054_29AF_4C8B_ACDC_A53180FB3A97__INCLUDED_)
#define AFX_DRAWVIEW_H__4EF21054_29AF_4C8B_ACDC_A53180FB3A97__INCLUDED_

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


class CDrawView : public CView
{
protected: // create from serialization only
	CDrawView();
	DECLARE_DYNCREATE(CDrawView)
	//此处增加画图标志
	bool m_bLine;//标识直线工具的画图标志
    bool m_bRect;//标识矩形工具的画图标志
	bool m_bElli;//标识椭圆工具的画图标志
	//此处标志鼠标绘图的起终点
	CPoint m_Start;//画图起点
	CPoint m_End;//画图终点

	bool m_drawing;//记录当前鼠标移动时是否正在画图标志
	HCURSOR m_Hcursor;//创建一个鼠标光标对象
// Attributes
public:
	CDrawDoc* GetDocument();

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CDrawView)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	protected:
	virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
	virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
	virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CDrawView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
	//{{AFX_MSG(CDrawView)
	afx_msg void OnLineMenu();
	afx_msg void OnRectMenu();
	afx_msg void OnElliMenu();
	afx_msg void OnUpdateElliMenu(CCmdUI* pCmdUI);
	afx_msg void OnUpdateLineMenu(CCmdUI* pCmdUI);
	afx_msg void OnUpdateRectMenu(CCmdUI* pCmdUI);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in DrawView.cpp
inline CDrawDoc* CDrawView::GetDocument()
   { return (CDrawDoc*)m_pDocument; }
#endif

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

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

#endif // !defined(AFX_DRAWVIEW_H__4EF21054_29AF_4C8B_ACDC_A53180FB3A97__INCLUDED_)