C++画扇形

// DrawView.cpp : implementation of the CDrawView class//#include "stdafx.h"#include "Draw.h"#include "DrawDoc.h"#include "DrawView.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif/////////////////////////////////////////////////////////////////////////////// CDrawViewIMPLEMENT_DYNCREATE(CDrawView, CView)BEGIN_MESSAGE_MAP(CDrawView, CView)//{{AFX_MSG_MAP(CDrawView)ON_WM_LBUTTONDOWN()ON_WM_LBUTTONUP()ON_WM_MOUSEMOVE()//}}AFX_MSG_MAP// Standard printing commandsON_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()/////////////////////////////////////////////////////////////////////////////// CDrawView construction/destructionCDrawView::CDrawView(){// TODO: add construction code herem_bDraw=false;m_ptOrigin=0;m_ptOld=0;}CDrawView::~CDrawView(){}BOOL CDrawView::PreCreateWindow(CREATESTRUCT& cs){// TODO: Modify the Window class or styles here by modifying// the CREATESTRUCT csreturn CView::PreCreateWindow(cs);}/////////////////////////////////////////////////////////////////////////////// CDrawView drawingvoid CDrawView::OnDraw(CDC* pDC){CDrawDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);// TODO: add draw code for native data here}/////////////////////////////////////////////////////////////////////////////// CDrawView printingBOOL CDrawView::OnPreparePrinting(CPrintInfo* pInfo){// default preparationreturn DoPreparePrinting(pInfo);}void CDrawView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/){// TODO: add extra initialization before printing}void CDrawView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/){// TODO: add cleanup after printing}/////////////////////////////////////////////////////////////////////////////// CDrawView diagnostics#ifdef _DEBUGvoid CDrawView::AssertValid() const{CView::AssertValid();}void CDrawView::Dump(CDumpContext& dc) const{CView::Dump(dc);}CDrawDoc* CDrawView::GetDocument() // non-debug version is inline{ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawDoc)));return (CDrawDoc*)m_pDocument;}#endif //_DEBUG/////////////////////////////////////////////////////////////////////////////// CDrawView message handlers//DEL void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) //DEL {//DEL // TODO: Add your message handler code here and/or call default//DEL MessageBox("view clicked");//DEL CView::OnLButtonDown(nFlags, point);//DEL }void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) {// TODO: Add your message handler code here and/or call default//MessageBox("view clicked");m_bDraw=true;m_ptOrigin=m_ptOld=point;CView::OnLButtonDown(nFlags, point);}void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) {// TODO: Add your message handler code here and/or call default/* 画图 *//* HDC hdc;hdc=::GetDC(m_hWnd);MoveToEx(hdc,m_ptOrigin.x,m_ptOrigin.y,NULL);LineTo(hdc,point.x,point.y);::ReleaseDC(m_hWnd,hdc);*//*CDC *pDC=GetDC();pDC->MoveTo(m_ptOrigin);pDC->LineTo(point);ReleaseDC(pDC);*///CClientDC dc(this);/*CClientDC dc(GetParent());dc.MoveTo(m_ptOrigin);dc.LineTo(point);*///CWindowDC dc(GetParent()); /* CWindowDC dc(GetDesktopWindow());dc.MoveTo(m_ptOrigin);dc.LineTo(point);*//*颜色线条*//*CPen pen(PS_DASH,1,RGB(255,0,0));CClientDC dc(this);CPen *pOldPen=dc.SelectObject(&pen);dc.MoveTo(m_ptOrigin);dc.LineTo(point);*//*CBrush brush(RGB(255,0,0));CClientDC dc(this);dc.FillRect(CRect(m_ptOrigin,point),&brush);*/m_bDraw=false;CView::OnLButtonUp(nFlags, point);}void CDrawView::OnMouseMove(UINT nFlags, CPoint point) {// TODO: Add your message handler code here and/or call defaultCPen pen(PS_SOLID,1,RGB(255,0,0));CClientDC dc(this);CPen *pOldPen=dc.SelectObject(&pen);if(m_bDraw==true){/**连续dc.MoveTo(m_ptOrigin); dc.LineTo(point);m_ptOrigin=point;*/dc.MoveTo(m_ptOrigin); dc.LineTo(m_ptOld);//dc.MoveTo(m_ptOrigin);dc.MoveTo(m_ptOld);dc.LineTo(point); m_ptOld=point;} dc.SelectObject(pOldPen);CView::OnMouseMove(nFlags, point);}//DEL void CDrawView::OnCancelMode() //DEL {//DEL CView::OnCancelMode();//DEL //DEL // TODO: Add your message handler code here//DEL //DEL }