sketcherview.cpp

学习 MFC 基本用法和功能 以及MFC工作原理

// sketcherView.cpp : CsketcherView 类的实现
//

#include "stdafx.h"
#include "sketcher.h"
#include "Ele.h"

#include "sketcherDoc.h"
#include "sketcherView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CsketcherView

IMPLEMENT_DYNCREATE(CsketcherView, CView)

BEGIN_MESSAGE_MAP(CsketcherView, CView)
	// 标准打印命令
	ON_COMMAND(ID_FILE_PRINT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, &CView::OnFilePrintPreview)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
END_MESSAGE_MAP()

// CsketcherView 构造/析构

CsketcherView::CsketcherView()
: m_pTempEle(NULL)
, m_FirPo(CPoint(0,0))
, m_SecPo(CPoint(0,0))
{
	// TODO: 在此处添加构造代码

}

CsketcherView::~CsketcherView()
{
}

BOOL CsketcherView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: 在此处通过修改
	//  CREATESTRUCT cs 来修改窗口类或样式

	return CView::PreCreateWindow(cs);
}

// CsketcherView 绘制

void CsketcherView::OnDraw(CDC* pDC)
{
	CsketcherDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	if (!pDoc)
		return;

	// TODO: 在此处为本机数据添加绘制代码

}


// CsketcherView 打印

BOOL CsketcherView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// 默认准备
	return DoPreparePrinting(pInfo);
}

void CsketcherView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 添加额外的打印前进行的初始化过程
}

void CsketcherView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 添加打印后进行的清除过程
}


// CsketcherView 诊断

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

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

CsketcherDoc* CsketcherView::GetDocument() const // 非调试版本是内联的
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CsketcherDoc)));
	return (CsketcherDoc*)m_pDocument;
}
#endif //_DEBUG


// CsketcherView 消息处理程序

void CsketcherView::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值

	CView::OnLButtonDown(nFlags, point);
	m_FirPo = point;
}

void CsketcherView::OnLButtonUp(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值

	CView::OnLButtonUp(nFlags, point);
	if(m_pTempEle)
	{
		delete m_pTempEle;
		m_pTempEle = 0;
	}
}

void CsketcherView::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值

	CView::OnMouseMove(nFlags, point);

	CClientDC aDC(this);
	aDC.SetROP2(R2_NOTXORPEN);

	
	if(nFlags & MK_LBUTTON)
	{
		m_SecPo = point;
		if(m_pTempEle)
		{
			if(CURVE == GetDocument()->GetEleType())
			{
				static_cast<CCurve*>(m_pTempEle)->AddSeg(m_SecPo);
				m_pTempEle->Draw(&aDC);
				return;
			}
			if(DIAN == GetDocument()->GetEleType())
			{
				static_cast<CDian*>(m_pTempEle)->AddSegDian(m_SecPo);
				m_pTempEle->Draw(&aDC);
				return;
			}
			m_pTempEle->Draw(&aDC);
			delete m_pTempEle;
			m_pTempEle = 0;
		}
	
		m_pTempEle = CreateEle();
		m_pTempEle->Draw(&aDC);
		}
		
		
	
}

CEle* CsketcherView::CreateEle(void)
{
	CsketcherDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	switch(pDoc->GetEleType())
	{case LINE:
		return new CLine(m_FirPo,m_SecPo,pDoc->GetEleColor());
	case RECTANGLE:
		return new CRec(m_FirPo,m_SecPo,pDoc->GetEleColor());
	case DIAN:
		return new CDian(m_FirPo,m_SecPo,pDoc->GetEleColor());
	case CIRCLE:
		return new CCir(m_FirPo,m_SecPo,pDoc->GetEleColor());
	case TUOYUAN:
		return new CTuo(m_FirPo,m_SecPo,pDoc->GetEleColor());
	case CURVE:
		return new CCurve(m_FirPo,m_SecPo,pDoc->GetEleColor());
	default:
		AfxMessageBox(_T("BAD ELEMENT CODE"),MB_OK);
		AfxAbort();
	
	 return NULL;
	}
}