ryxgpsview.cpp

这是GPS接收机仿真的程序

// RyxGpsView.cpp : implementation of the CRyxGpsView class
//

#include "stdafx.h"
#include "RyxGps.h"
#include "MainFrm.h"
#include "RyxGpsDoc.h"
#include "RyxGpsView.h"
#include <stdio.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
//----------------------------------------------------------------------------------
#define ID_TIMER	1
#define PI			3.1416
/////////////////////////////////////////////////////////////////////////////
// CRyxGpsView

IMPLEMENT_DYNCREATE(CRyxGpsView, CView)

BEGIN_MESSAGE_MAP(CRyxGpsView, CView)
	//{{AFX_MSG_MAP(CRyxGpsView)
	ON_COMMAND(ID_START, OnStart)
	ON_UPDATE_COMMAND_UI(ID_START, OnUpdateStart)
	ON_COMMAND(ID_END, OnEnd)
	ON_UPDATE_COMMAND_UI(ID_END, OnUpdateEnd)
	ON_WM_TIMER()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_MOUSEMOVE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRyxGpsView construction/destruction

CRyxGpsView::CRyxGpsView()
{
	// TODO: add construction code here
	m_BkBrush.CreateSolidBrush(RGB(0,0,200));
	m_penWhite.CreatePen(PS_SOLID,0,RGB(255,255,255));
	m_penYellow.CreatePen(PS_SOLID,0,RGB(255,255,0));
	m_penRed.CreatePen(PS_SOLID,0,RGB(255,0,0));
	m_NullBrush.CreateStockObject(NULL_BRUSH);
}

CRyxGpsView::~CRyxGpsView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CRyxGpsView drawing

void CRyxGpsView::OnDraw(CDC* pDC)
{
	char pszNum[10];
	char pszTemp[50];
	int  iNum;
	int  iOffset;
	int  i;
	int  alpha,sita;
	int  iIndex;
	CRyxGpsDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	pDoc->GetSubWord(22,pszNum);
	iNum=atoi(pszNum);
	if(pDoc->m_ReveiverID==1)
		iOffset=22;
	else if(pDoc->m_ReveiverID==2)
	{
		switch(iNum)
		{
		case 10:
			iOffset=84;
			break;
		case 11:
			iOffset=90;
			break;
		default:
			break;
		}
	}
	DrawAxis(pDC);
	for(i=0;i<iNum;i++)
	{
		pDoc->GetSubWord(iOffset+i*6+1,pszTemp);
		iIndex=atoi(pszTemp);
		pDoc->GetSubWord(iOffset+i*6+2,pszTemp);
		alpha=atoi(pszTemp);;
		pDoc->GetSubWord(iOffset+i*6+3,pszTemp);
		sita=atoi(pszTemp);
		DrawPlanet(iIndex,alpha,sita,pDC);
	}

}

/////////////////////////////////////////////////////////////////////////////
// CRyxGpsView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CRyxGpsView message handlers

void CRyxGpsView::OnStart() 
{
	// TODO: Add your command handler code here
	if(!m_bRunning)
	{
		char s[256];
		CString str;
		::GetCurrentDirectory(sizeof(s),s);
		str=s;
		if(str.GetAt(str.GetLength()-1)!='\\')
			str+='\\';
		str+="Atti.txt";
		if((m_pFile=fopen(str,"rb"))==NULL)
		{
			MessageBox("Can't open File");
			return;
		}
		else
		{
			m_bRunning=TRUE;
			SetTimer(ID_TIMER,100,NULL);
		}
	}
}
void CRyxGpsView::OnUpdateStart(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(!m_bRunning);
}
void CRyxGpsView::OnEnd() 
{
	if(m_bRunning)
	{
		m_bRunning=FALSE;
		KillTimer(ID_TIMER);
		fclose(m_pFile);
	}
}
void CRyxGpsView::OnUpdateEnd(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_bRunning);
}
void CRyxGpsView::OnInitialUpdate() 
{
	CView::OnInitialUpdate();
	m_bRunning=FALSE;
}

void CRyxGpsView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	CRyxGpsDoc* pDoc = GetDocument();
	char chPrevious;
	char chCurrent;
	int  i=0;
	chPrevious=0;
	while(i<3000)
	{
		chCurrent=fgetc(m_pFile);
		if(feof(m_pFile))
			OnEnd();
		if((chCurrent==0x0d)&&(chPrevious==0x0a)) //find 2 CR ('\n')
			break;
		pDoc->m_buffer[i]=chCurrent;
		i++;
		chPrevious=chCurrent;
	}
	pDoc->m_buffer[i]='\0';
	Invalidate();								//notify to update
	POSITION pos = pDoc->GetFirstViewPosition();
	while (pos != NULL)
	{
		CView* pView = pDoc->GetNextView(pos);
		if(pView!=this)
			pView->SendMessage(WM_MYNOTIFY,0,0);
	}   
	CView::OnTimer(nIDEvent);
}

void CRyxGpsView::OnDestroy() 
{
	CView::OnDestroy();
	if(m_bRunning)
	{
		m_bRunning=FALSE;
		KillTimer(ID_TIMER);
		fclose(m_pFile);
	}
}

BOOL CRyxGpsView::OnEraseBkgnd(CDC* pDC) 
{
	// TODO: Add your message handler code here and/or call default
	CRect rect;
	GetClientRect(&rect);
	pDC->FillRect(&rect,&m_BkBrush);
	return TRUE;
}

void CRyxGpsView::DrawAxis(CDC *pDC)
{
	CRect rect;
	int iWidth;
	char strNum[10];
	CRyxGpsDoc* pDoc = GetDocument();
	pDoc->GetSubWord(22,strNum);
	GetClientRect(&rect);
	iWidth=min(rect.Width(),rect.Height());
	rect.right=rect.bottom=iWidth;
	rect.InflateRect(-2,-2);
	pDC->SetBkMode(TRANSPARENT);
	pDC->SetTextColor(RGB(0,255,0));
	pDC->SelectObject(&m_penWhite);
	pDC->MoveTo(rect.left,(rect.top+rect.bottom)/2);
	pDC->LineTo(rect.right,(rect.top+rect.bottom)/2);
	pDC->MoveTo((rect.left+rect.right)/2,rect.top);
	pDC->LineTo((rect.left+rect.right)/2,rect.bottom);
	rect.InflateRect(-30,-30);
	pDC->TextOut(rect.right+20,(rect.top+rect.bottom)/2,CString("0"));
	pDC->TextOut(rect.right+20,(rect.top+rect.bottom)/2-20,CString("90"));
	pDC->TextOut((rect.right+rect.left)/2,rect.top-20,CString("0"));
	pDC->TextOut((rect.right+rect.left)/2-30,rect.top-20,CString("360"));
	pDC->TextOut(rect.left-30,(rect.top+rect.bottom)/2-20,CString("270"));
	pDC->TextOut((rect.right+rect.left)/2,rect.bottom,CString("180"));
	pDC->TextOut((rect.right+rect.left)/2+20,rect.top-20,CString("卫星天空视图"));
	pDC->TextOut((rect.right+rect.left)/2+50,rect.bottom,CString("可用卫星数目: ")+strNum);
	pDC->SelectObject(&m_NullBrush);
	pDC->SelectObject(&m_penYellow);
	pDC->Ellipse(&rect);
	int delta;
	delta=(int)(0.5*(double)rect.Width()*(1.0-cos(PI/6)));
	pDC->Ellipse(rect.left+delta,rect.top+delta,rect.right-delta,rect.bottom-delta);
	pDC->TextOut(rect.right-delta,(rect.top+rect.bottom)/2,CString("30"));;
	rect.InflateRect(-rect.Width()/4,-rect.Height()/4);
	pDC->Ellipse(&rect);
	pDC->TextOut(rect.right,(rect.top+rect.bottom)/2,CString("60"));
	pDC->TextOut((rect.right+rect.left)/2,(rect.top+rect.bottom)/2,CString("90"));

}


POINT CRyxGpsView::ConvertToLogic(int alpah, int sita)
{
	CRect rect;
	POINT pt,pt_ret;
	int iWidth;
	double R,r;
	GetClientRect(&rect);
	iWidth=min(rect.right,rect.bottom);
	rect.right=rect.bottom=iWidth;
	rect.InflateRect(-32,-32);
	R=rect.Width()/2.0;
	r=R*cos(PI*(double)alpah/180.0);
	pt.x=(int)(r*cos(PI*(double)sita/180));
	pt.y=(int)(r*sin(PI*(double)sita/180)); //变为导航直角坐标
	iWidth=pt.x;
	pt.x=pt.y;
	pt.y=iWidth;							//变为笛卡儿直角坐标
	pt_ret.x=pt.x+(rect.right+rect.left)/2;
	pt_ret.y=(rect.bottom+rect.top)/2-pt.y;	//变为设备坐标系
	return pt_ret;
}

void CRyxGpsView::DrawPlanet(int iIndex,int alpah, int sita,CDC *pDC)
{
	POINT pt;
	char s[3];
	wsprintf(s,"%d",iIndex);
	pDC->SelectObject(&m_penRed);
	pt=ConvertToLogic(alpah,sita);
	pDC->Ellipse(pt.x-10,pt.y-10,pt.x+10,pt.y+10);
	pDC->SetTextColor(RGB(0,255,255));
	pDC->TextOut(pt.x-7,pt.y-7,s,lstrlen(s));
}

void CRyxGpsView::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CString str,str1;
	CRect rect;
	CRgn   rgn;
	double alpha,sita;
	double cos_alpha;
	double sin_sita,cos_sita;
	double distance;
	CPoint ptOrigin; 
	GetClientRect(&rect);
	rect.right=rect.bottom=min(rect.right,rect.bottom);
	rect.InflateRect(-32,-32);
	ptOrigin.x=(rect.left+rect.right)/2;
	ptOrigin.y=(rect.top+rect.bottom)/2;
	rgn.CreateEllipticRgn(rect.left,rect.top,rect.right,rect.bottom);
	CMainFrame *pFrame=(CMainFrame *)AfxGetMainWnd();
	if(rgn.PtInRegion(point))
	{
		distance=sqrt(pow(ptOrigin.x-point.x,2)+pow(ptOrigin.y-point.y,2));
		cos_alpha=distance/(rect.Width()/2.0);
		alpha=acos(cos_alpha);
		str.Format("高度角α=%.2f",alpha*180.0/PI);
		sin_sita=(point.x-ptOrigin.x)/distance;
		cos_sita=-(point.y-ptOrigin.y)/distance;
		sita=acos(cos_sita);
		if(sin_sita>=0)
			sita=sita*180.0/PI;
		else
			sita=-sita*180.0/PI+360;
		str1.Format("，方位角θ=%f",sita);
		str+=str1;
		pFrame->m_wndStatusBar.SetPaneText(2,str);
	}
	else
		pFrame->m_wndStatusBar.SetPaneText(2,"工作正常!");

	CView::OnMouseMove(nFlags, point);
}