ch9demo7view.cpp

零基础学Visual.C....教案PPT.随书光盘-452M.zip

// Ch9Demo7View.cpp : implementation of the CCh9Demo7View class
//

#include "stdafx.h"
#include "Ch9Demo7.h"

#include "Ch9Demo7Doc.h"
#include "Ch9Demo7View.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View

IMPLEMENT_DYNCREATE(CCh9Demo7View, CView)

BEGIN_MESSAGE_MAP(CCh9Demo7View, CView)
	//{{AFX_MSG_MAP(CCh9Demo7View)
	ON_WM_LBUTTONDOWN()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View construction/destruction

CCh9Demo7View::CCh9Demo7View()
{
	// TODO: add construction code here
	rgnA.CreateRectRgn(0,0,400,400);						//创建初始对象，任意值均可
	rgnB.CreateRectRgn(0,0,400,400);						//创建初始对象，任意值均可
}

CCh9Demo7View::~CCh9Demo7View()
{
}

BOOL CCh9Demo7View::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View drawing

void CCh9Demo7View::OnDraw(CDC* pDC)
{
	CCh9Demo7Doc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	CRgn rgn1,rgn2; 							//构造CRgn对象
	CPoint pts[]={CPoint(190, 90),CPoint(370, 40), CPoint(210, 300),  CPoint(100, 30)};
	rgn1.CreatePolygonRgn(pts,4,ALTERNATE );									//绘制多端折线
	rgn2.CreateEllipticRgn(120,25,190,300); 				//椭圆区域
	rgnA.CombineRgn(&rgn1,&rgn2,RGN_AND); 			//交集
	rgnB.CombineRgn(&rgn1,&rgn2,RGN_XOR); 			//交集以外的区域
	CBrush brush,brush2; 
	brush.CreateSolidBrush(RGB(255,0,0)); //创建画刷
	pDC->FillRgn(&rgnA,&brush);//用画刷填充区域
	brush2.CreateHatchBrush(HS_DIAGCROSS,RGB(128,0,128)); 	//创建画刷
	pDC->FillRgn(&rgnB,&brush2);//用画刷填充区域
	brush.DeleteObject();//删除画刷
	brush2.DeleteObject();//删除画刷
}


/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View printing

BOOL CCh9Demo7View::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CCh9Demo7View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CCh9Demo7View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View diagnostics

#ifdef _DEBUG
void CCh9Demo7View::AssertValid() const
{
	CView::AssertValid();
}

void CCh9Demo7View::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CCh9Demo7Doc* CCh9Demo7View::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CCh9Demo7Doc)));
	return (CCh9Demo7Doc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CCh9Demo7View message handlers

void CCh9Demo7View::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if (rgnA.PtInRegion(point))//鼠标位置在区域A中
	{
		AfxMessageBox("用户击中了两个图形的交集！");
	}
	if (rgnB.PtInRegion(point))//鼠标位置在区域B中
	{
		AfxMessageBox("用户击中了两个图形的交集以外的区域！");
	}	
	CView::OnLButtonDown(nFlags, point);
}