funappimg.cpp

我以前写的一个的神经网络学习函数逼近和分类的例子

// FunAppImg.cpp : implementation file
//

#include "stdafx.h"
#include "neuronetsample.h"
#include "FunAppImg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CFunAppImg

CFunAppImg::CFunAppImg()
{
	m_pMemDC = NULL;
	m_pWndDC = NULL;

}

CFunAppImg::~CFunAppImg()
{
	if (m_pMemDC != NULL)
		delete m_pMemDC;
}


BEGIN_MESSAGE_MAP(CFunAppImg, CStatic)
	//{{AFX_MSG_MAP(CFunAppImg)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFunAppImg message handlers

void CFunAppImg::InitImg()
{
//	BITMAP stBitmap;
	RECT rect;

	GetClientRect(&rect);
	int iWidth = rect.right;
	int iHeight = rect.bottom;

	m_pMemDC = new CDC;
	m_pWndDC = GetDC();
	m_pMemDC->CreateCompatibleDC(m_pWndDC);

//	stBitmap.bmType = 0;
//	stBitmap.bmWidth = rect.right;
//	stBitmap.bmHeight = rect.bottom;
//	stBitmap.
//	m_pBitmap->CreateBitmapIndirect()
	m_Bitmap.CreateCompatibleBitmap(m_pWndDC, iWidth, iHeight);
	m_pMemDC->SelectObject(&m_Bitmap);
	ClearPaint();
}

void CFunAppImg::PaintImg(double* pOut, int iSamples, double dMax, BOOL bAutoScale, BOOL bStemGraph)
{
	//clear graph
	POINT p;
	RECT rect;

	GetClientRect(&rect);
	int iWidth = rect.right;
	int iHeight = rect.bottom;

	//show graph	
	char szMax [10];
	memset(szMax,0, 10);
	sprintf(szMax, "%5.4e", dMax);
	
	CPen* pPen = new CPen;
	LOGPEN stLogPen;
	stLogPen.lopnStyle = PS_SOLID;
	stLogPen.lopnWidth = CPoint(0,0);
	stLogPen.lopnColor = 0x00000000;
	pPen->CreatePenIndirect(&stLogPen);
	m_pMemDC->SelectObject(pPen);

	
	int iFontSize = 10;
	m_pMemDC->TextOut(3, 3, szMax);
	m_pMemDC->TextOut(20 - iFontSize, iHeight/2, "0");
	m_pMemDC->TextOut(iWidth-20-iFontSize, iHeight/2-iFontSize-4, "2π");
	m_pMemDC->MoveTo(10, iHeight/2);
	m_pMemDC->LineTo(iWidth-10,iHeight/2);

	pPen->DeleteObject();
	stLogPen.lopnStyle = PS_SOLID;
	stLogPen.lopnWidth = CPoint(0,0);
	stLogPen.lopnColor = 0x00FF0000;
	pPen->CreatePenIndirect(&stLogPen);
	m_pMemDC->SelectObject(pPen);

	m_pMemDC->OffsetViewportOrg(20,10);

	int iWidth1 = iWidth - 40;
	int iHeight1 = iHeight - 20;

	p.y = iHeight1/2;
	p.x = 0;
	m_pMemDC->MoveTo(p);
	p.y = iHeight1/2 - pOut[0]/max(dMax,1) * iHeight1/2;
	m_pMemDC->LineTo(p);

	int i;
	for (i = 1; i < iSamples; i++)
	{
		p.y = iHeight1/2;
		if (!bAutoScale)
			p.x = double(iWidth1)/(iSamples-1) * i;
		else
			p.x = iWidth1/(iSamples-1) * i;

		if (bStemGraph)
			m_pMemDC->MoveTo(p);

		p.y = iHeight1/2 - pOut[i]/max(dMax,1) * iHeight1/2;		
		m_pMemDC->LineTo(p);
	}

	m_pMemDC->OffsetViewportOrg(-20,-10);
	
	m_pWndDC->BitBlt(0,0, iWidth, iHeight, m_pMemDC, 1, 1, SRCCOPY);
	
	delete pPen;
}

void CFunAppImg::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	RECT rect;
	GetClientRect(&rect);
	int iWidth = rect.right;
	int iHeight = rect.bottom;
	m_pWndDC->BitBlt(0,0, iWidth, iHeight, m_pMemDC, 1, 1, SRCCOPY);
	
	// Do not call CStatic::OnPaint() for painting messages
}

void CFunAppImg::ClearPaint() 
{
	RECT rect;

	GetClientRect(&rect);
	int iWidth = rect.right;
	int iHeight = rect.bottom;
	m_pMemDC->FillSolidRect(&rect, 0x00FFFFFF);
	m_pWndDC->BitBlt(0,0, iWidth, iHeight, m_pMemDC, 1, 1, SRCCOPY);
}