lineview.cpp

功能是简单的画线功能

// 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()
	//}}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()
{
	// TODO: add construction code here
m_pt0=0;
}

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) 
{
	// TODO: Add your message handler code here and/or call default
	m_pt0=point;
	CView::OnLButtonDown(nFlags, point);
}

void CLineView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	HDC hdc;
	hdc=::GetDC(m_hWnd);
	MoveToEx(hdc,m_pt0.x,m_pt0.y,NULL);
	LineTo(hdc,point.x,point.y);
	::ReleaseDC(m_hWnd,hdc);
	CView::OnLButtonUp(nFlags, point);
}