lineview.cpp

visual c++ 时尚编程百例 全部源代码

// LineView.cpp : implementation of the CLineView class
//

#include "stdafx.h"
#include "Line.h"

#include "LineDoc.h"
#include "LineView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CLineView

IMPLEMENT_DYNCREATE(CLineView, CView)

BEGIN_MESSAGE_MAP(CLineView, CView)
	//{{AFX_MSG_MAP(CLineView)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_COMMAND(IDR_DRAW_LINE, OnDrawLine)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CLineView construction/destruction

CLineView::CLineView()
{
	m_bLine=false;
	// TODO: add construction code here

}

CLineView::~CLineView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CLineView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CLineView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CLineView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CLineView message handlers

void CLineView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	if(m_bLine)
	{
		m_StartPoint=point;
		m_LastEndPoint=point;
		SetCapture();
	}
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonDown(nFlags, point);
}

void CLineView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	CClientDC dc(this);
	if(m_bLine&&(GetCapture()==this))
	{
		ReleaseCapture();
		dc.MoveTo(m_StartPoint);
		dc.LineTo(point);
	}
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonUp(nFlags, point);
}

void CLineView::OnMouseMove(UINT nFlags, CPoint point) 
{
	
	CClientDC dc(this);
	if(m_bLine&&(nFlags&&MK_LBUTTON))
	{
		int nDrawmode=dc.GetROP2();
		dc.SetROP2(R2_NOT);
		dc.MoveTo(m_StartPoint);
		dc.LineTo(m_LastEndPoint);
		dc.SetROP2(nDrawmode);
		dc.MoveTo(m_StartPoint);
		dc.LineTo(point);
		m_LastEndPoint=point;
	}
	// TODO: Add your message handler code here and/or call default
	
//	CView::OnMouseMove(nFlags, point);
}

void CLineView::OnDrawLine() 
{m_bLine=true;
}