mathexprdlg.cpp

非常好的数学公式计算源代码

// MathExprDlg.cpp : implementation file
//

//#include <vld.h>		// memory leak detector
#include "stdafx.h"
#include "MathExpr.h"
#include "MathExprDlg.h"
#include "../../../MTParserLib/TestCases.h"
#include "../../../MTParserLib/MTTools.h"
#include "IndexDlg.h"
#include "DefineMacroDlg.h"
#include <math.h>
#include <float.h>	// for the _finite function

#define PLUGINFILE _T("MTDateCOMPlugin.dll")	// demo COM plugin file

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



/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMathExprDlg dialog

CMathExprDlg::CMathExprDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMathExprDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMathExprDlg)
	m_expr = _T("");
	m_msg = _T("");
	m_varx = 0.0;
	m_vary = 0.0;
	m_varz = 0.0;
	m_result = 0.0;
	m_benchType = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMathExprDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMathExprDlg)
	DDX_Control(pDX, IDC_BENCHMARK, m_benchBtn);
	DDX_Control(pDX, IDC_EVALUATE, m_evaluateBtn);
	DDX_Text(pDX, IDC_EXPR, m_expr);
	DDX_Text(pDX, IDC_MSG, m_msg);
	DDX_Text(pDX, IDC_VARX, m_varx);
	DDX_Text(pDX, IDC_VARY, m_vary);
	DDX_Text(pDX, IDC_VARZ, m_varz);
	DDX_Text(pDX, IDC_RESULT, m_result);
	DDX_Radio(pDX, IDC_BENCHEVAL, m_benchType);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMathExprDlg, CDialog)
	//{{AFX_MSG_MAP(CMathExprDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_EVALUATE, OnEvaluate)	
	ON_BN_CLICKED(IDC_INDEX, OnIndex)
	ON_BN_CLICKED(IDC_BENCHMARK, OnBenchmark)
	ON_BN_CLICKED(IDC_DEFINEMACRO, OnDefinemacro)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMathExprDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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	
	
	m_expr = _T("pi*min(x+y+sin(z)/2^3-40.9988*2, avg(y,x*10,3,5))");		
	

	CoInitialize(NULL);	

	try
	{		
		
		if( !MTTools::registerCOMObject(PLUGINFILE) )
		{
			MessageBox(_T("Unable to register the plugin"));
		}
		else
		{	
			m_mathExpr.loadPlugin(_T("{4C639DCD-2043-42DC-9132-4B5C730855D6}"));
		}	
		
		m_mathExpr.defineVar(_T("x"), &m_varx);
		m_mathExpr.defineVar(_T("y"), &m_vary);
		m_mathExpr.defineVar(_T("z"), &m_varz);
		
		// constant definitions
		m_mathExpr.defineConst(_T("pi"), 3.14159265359);
		m_mathExpr.defineConst(_T("e"), 2.7182818284590452354);	
		
	}
	catch( MTException e )
	{
		MessageBox(e.m_description.c_str(), _T("Definition error"), MB_OK|MB_ICONSTOP);
		EndDialog(IDCANCEL);
		return TRUE;
	}	
	
	
	// Modification safety net! Unit tests.	
	
	MTTestSuite tc;
	if( !tc.doTests() )
	{
		MessageBox(_T("Unit tests failed!"), _T(""), MB_OK);
	}
	
	
	

	

	UpdateData(0);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMathExprDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CMathExprDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMathExprDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMathExprDlg::OnOK() 
{
	//CDialog::OnOK();
}

void CMathExprDlg::OnEvaluate() 
{
	UpdateData(1);	
	m_msg = _T("");

	try
	{
		m_result = m_mathExpr.evaluate(m_expr.GetBuffer(0));			
		
		unsigned int nbUsedVars = m_mathExpr.getNbUsedVars();
		if( nbUsedVars > 0 )
		{
			m_msg = _T("Used variables: ");
			for( unsigned int t=0; t<nbUsedVars; t++ )
			{
				m_msg += m_mathExpr.getUsedVar(t).varName.c_str();
				if( t != nbUsedVars-1 )
				{
					m_msg += _T(", ");
				}					
			}
		}
		else
		{
			m_msg = _T("No variable used");			
		}
		
		if( m_mathExpr.isConstant() )
		{
			m_msg += _T("\r\n");
			m_msg += _T("Constant expression");
		}

		if( !m_mathExpr.isFinite() )
		{
			m_msg += _T("\r\nInvalid result");
			m_result = 0;
		}
	}
	catch( MTException &e )
	{
		printException(e);
	}

	UpdateData(0);	
}

void CMathExprDlg::OnBenchmark() 
{
	UpdateData(1);	
	m_msg = _T("Processing...");
	UpdateData(0);	
	UpdateWindow();	

	try
	{	
		
		MTSTRING expr = m_expr.GetBuffer(0);
		m_mathExpr.compile(m_expr.GetBuffer(0));

		unsigned int loops;
		unsigned int elapsed;	
		bool isValid;
		CString msg;

		if( m_benchType == 0 )		
		{
			// evaluation benchmark
			EvaluateBenchmark bench;
			bench.setParser( &m_mathExpr );
			isValid = bench.bench(500, loops, elapsed);
			msg = _T("Evaluation Benchmark Results:\r\n\r\nTime per evaluation(ms) = %f\r\nEvaluations per second = %d");
		}
		else
		{
			// compilation benchmark
			CompileBenchmark bench;
			bench.setParser( &m_mathExpr, expr );
			isValid = bench.bench(50, loops, elapsed);
			msg = _T("Compilation Benchmark Results:\r\n\r\nTime per compilation(ms) = %f\r\nCompilations per second = %d");
		}
	
		if( isValid )
		{
			double each = (elapsed)/(double)loops;
			int nbEvalPerSec = 1000*loops/elapsed;							
			m_msg.Format(msg, each, nbEvalPerSec);			
		}
		else
		{
			CString msg = _T("Unable to benchmark accurately.  Try again.");
			m_msg = msg;
		}
		
	}
	catch( MTException &e )
	{
		printException(e);
	}

	UpdateData(0);	
	
	
}


void CMathExprDlg::OnIndex() 
{
	IndexDlg index(&m_mathExpr);		
	index.DoModal();	
}

void CMathExprDlg::printException(const MTException &e)
{
	m_msg = _T("");
	for( unsigned int t=0; t<e.m_descriptionList.size(); t++ )
	{
		m_msg += e.m_descriptionList[t].c_str();

		if( t != e.m_descriptionList.size()-1 )
		{
			m_msg += _T("\r\n");
		}		
	}

	UpdateData(0);
}


BOOL CMathExprDlg::DestroyWindow() 
{

	MTTools::unregisterCOMObject(PLUGINFILE);

	return CDialog::DestroyWindow();
}

void CMathExprDlg::OnDefinemacro() 
{
	CDefineMacroDlg dlg;
	dlg.setParser(&m_mathExpr);
	dlg.DoModal();
}