beziercetestdlg.cpp

wince 画BEZIER曲线的演示例子

// BezierCETestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "BezierCETest.h"
#include "BezierCETestDlg.h"
#include "Bezier.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBezierCETestDlg dialog

CBezierCETestDlg::CBezierCETestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBezierCETestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBezierCETestDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CBezierCETestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBezierCETestDlg)
	DDX_Control(pDX, IDC_SLIDER_QUALITY, m_sliderControl);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBezierCETestDlg, CDialog)
	//{{AFX_MSG_MAP(CBezierCETestDlg)
	ON_WM_PAINT()
	ON_NOTIFY(NM_CUSTOMDRAW, IDC_SLIDER_QUALITY, OnCustomdrawSliderQuality)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBezierCETestDlg message handlers

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

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	m_sliderControl.SetRange(4, 32, TRUE);
	m_nQuality = 18;
	m_sliderControl.SetPos(18);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}



void CBezierCETestDlg::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	//
	// Clear the area where we are drawing the Bezier-spline
	//
	CBrush aWhiteBrush(RGB(255, 255, 255));
	dc.FillRect(CRect(10, 100, 230, 200), &aWhiteBrush);
	
	//
	// Setup some control points
	//
	CPoint aBezier[7] = { CPoint(10, 150), CPoint(30, 100), CPoint(60, 200), CPoint(90, 150), CPoint(150, 100), CPoint(210, 200), CPoint(230, 150) };

	//
	// Draw the two connected bezier-splines
	//
	DrawBeziers(&dc, &aBezier[0], 7, m_nQuality);
	
	//
	// A reference line
	//
	dc.MoveTo(0, 150);
	dc.LineTo(240, 150);
	
	// Do not call CDialog::OnPaint() for painting messages
}

void CBezierCETestDlg::OnCustomdrawSliderQuality(NMHDR* pNMHDR, LRESULT* pResult) 
{
	int nPos = m_sliderControl.GetPos();
	if(nPos != m_nQuality)
	{
		m_nQuality = nPos;

		RedrawWindow();
	}	
	*pResult = 0;
}