#include "stdafx.h"
#include "XGXGDlg.h"

IMPLEMENT_DYNAMIC(CXGXGDlg, CDialog)

CXGXGDlg::CXGXGDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CXGXGDlg::IDD, pParent)
	, m_dGradNew(0)
{
}

CXGXGDlg::~CXGXGDlg()
{
}

void CXGXGDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_EDIT1, m_dGrad);
	DDX_Text(pDX, IDC_EDIT3, m_dGradNew);
}

BEGIN_MESSAGE_MAP(CXGXGDlg, CDialog)
	ON_BN_CLICKED(IDOK, &CXGXGDlg::OnBnClickedOk)
END_MESSAGE_MAP()

BOOL CXGXGDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	UpdateData(FALSE);

	return TRUE;
}

void CXGXGDlg::SetStartAndEndZ(double dSz,double dEz,double dXL)
{
	//坡度:两点的高程差与其水平距离的百分比
	m_dGradNew = (dEz - dSz) / dXL;
	m_dGradNew *= 100.0;
	m_dGrad = m_dGradNew;
}

void CXGXGDlg::OnBnClickedOk()
{
	UpdateData();

	//要求坡度同符号
	if ( m_dGradNew * m_dGrad < -1.e-10)
	{
		AfxMessageBox(_T("坡度不可以反向!"));
		return;
	}

	OnOK();
}

bool CXGXGDlg::GetGrade(double& dGrade) const
{
	dGrade = m_dGradNew;
	if ( fabs(dGrade - m_dGrad) < 1.e-6)
	{
		return false;
	}
	return true;
}