SFML community forums

Help => General => Topic started by: stng2003 on August 07, 2011, 05:31:57 am

Title: What's wrong with my code ?
Post by: stng2003 on August 07, 2011, 05:31:57 am

Hi,I decide to write a little program with SFML using VC.

I write a Dialog based program, and declare a sf::RenderWindow pointer "ttl2D" in dialog class .

The pointer is initiaized in OnInitDialog() method, and attach a CStatic control:

Code: [Select]


    ttl2D = new sf::RenderWindow( GetDlgItem(IDC_STATIC_2D)->GetSafeHwnd(),ws );


In the OnPaint method,I write

Code: [Select]


    ttl2D->Clear();
    ttl2D->Display();


I hope the static control should be filled with black,but nothing happened with the static contol.

I wonder whether there was something wrong with my code ?

Thanx!

Title: What's wrong with my code ?
Post by: OniLinkPlus on August 07, 2011, 10:57:42 pm

It'd be nice if you gave us a complete and minimal code that recreates the problem, complete meaning it can be compiled on its own, and minimal meaning one file, and only containing code related to the problem.

Title: What's wrong with my code ?
Post by: JAssange on August 08, 2011, 12:48:25 am

Quote from: "OniLink10"

It'd be nice if you gave us a complete and minimal code that recreates the problem, complete meaning it can be compiled on its own, and minimal meaning one file, and only containing code related to the problem.

I assume he's using MFC since he said dialog-based application so he'd likely have to provide the entire solution.

Title: What's wrong with my code ?
Post by: stng2003 on August 08, 2011, 03:33:17 pm

My code:

TestSFMLDlg.h ->

Code: [Select]



#pragma once

//////////////////////////////////////////////////////////////////////////

static UINT FFT_MSG = ::RegisterWindowMessage(_T("fft thread msg"));

//////////////////////////////////////////////////////////////////////////

#include <SFML/Graphics.hpp>

#ifdef _DEBUG
#pragma comment(lib,"sfml-window-d.lib")
#pragma comment(lib,"sfml-graphics-d.lib")
#pragma comment(lib,"sfml-system-d.lib")
#else
#pragma comment(lib,"sfml-window.lib")
#pragma comment(lib,"sfml-graphics.lib")
#pragma comment(lib,"sfml-system.lib")
#endif

#include "fftw3.h"
#pragma comment(lib, "libfftw3-3.lib")

class CTestSFMLDlg : public CDialog
{
public:
CTestSFMLDlg(CWnd* pParent = NULL);
~CTestSFMLDlg();

enum { IDD = IDD_TESTSFML_DIALOG };

protected:
virtual void DoDataExchange(CDataExchange* pDX);

protected:
HICON m_hIcon;

virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
DECLARE_MESSAGE_MAP()

afx_msg LRESULT OnFFTMsg( WPARAM wp,LPARAM lp );

public:
afx_msg void OnBnClickedOk();

protected:

static UINT Thread(LPVOID lp);

void DrawSpectralLines();

protected:

sf::RenderWindow* ttl2D;

fftw_complex* mpIncomeData;
fftw_complex* mpResultFFTData;
static const int FFT_SIZE;

CString mstrInFileName;

BOOL mbThreadIsRunning;
BOOL mbQuitThread;
};



TestSFMLDlg.cpp ->

Code: [Select]



#include "stdafx.h"
#include "TestSFML.h"
#include "TestSFMLDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

const int CTestSFMLDlg::FFT_SIZE = 1024;

class CAboutDlg : public CDialog
{
public:
CAboutDlg();
enum { IDD = IDD_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange* pDX);  

protected:
DECLARE_MESSAGE_MAP()
};

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

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()

CTestSFMLDlg::CTestSFMLDlg(CWnd* pParent /*=NULL*/)
: CDialog(CTestSFMLDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

mbQuitThread = mbThreadIsRunning = FALSE;

mpIncomeData = mpResultFFTData = NULL;
}

CTestSFMLDlg::~CTestSFMLDlg()
{
delete ttl2D;

if ( mpIncomeData && mpResultFFTData ) {
fftw_free(mpIncomeData);
fftw_free(mpResultFFTData);
}
}

void CTestSFMLDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CTestSFMLDlg, CDialog)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
//}}AFX_MSG_MAP
ON_BN_CLICKED(IDOK, &CTestSFMLDlg::OnBnClickedOk)
ON_REGISTERED_MESSAGE(FFT_MSG,&CTestSFMLDlg::OnFFTMsg)
END_MESSAGE_MAP()


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

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);
}
}

SetIcon(m_hIcon, TRUE);
SetIcon(m_hIcon, FALSE);

//////////////////////////////////////////////////////////////////////////

sf::WindowSettings ws;
ws.AntialiasingLevel = 1;

ttl2D = new sf::RenderWindow( GetDlgItem(IDC_STATIC_2D)->GetSafeHwnd(),ws );

mpIncomeData = (fftw_complex*)fftw_malloc(sizeof(fftw_complex)*FFT_SIZE);
mpResultFFTData = (fftw_complex*)fftw_malloc(sizeof(fftw_complex)*FFT_SIZE);

//////////////////////////////////////////////////////////////////////////

return TRUE;  
}

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

void CTestSFMLDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this);

SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

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;

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

        DrawSpectralLines();
}

HCURSOR CTestSFMLDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}


void CTestSFMLDlg::OnBnClickedOk()
{
CFileDialog dlg(TRUE);

mstrInFileName = dlg.GetPathName();

AfxBeginThread(Thread,this);
}


LRESULT CTestSFMLDlg::OnFFTMsg( WPARAM wp,LPARAM lp )
{
Invalidate();
return 0;
}

UINT CTestSFMLDlg::Thread(LPVOID lp)
{

CTestSFMLDlg* pdlg = (CTestSFMLDlg*)lp;

CFile inFile(pdlg->mstrInFileName,CFile::modeRead);

short __declspec(align(16)) readBuf[ FFT_SIZE ] = {0};

DWORD rd = 0;

//////////////////////////////////////////////////////////////////////////

fftw_plan p = fftw_plan_dft_1d( FFT_SIZE,pdlg->mpIncomeData,pdlg->mpResultFFTData,FFTW_FORWARD,FFTW_MEASURE );

//////////////////////////////////////////////////////////////////////////

while ( !pdlg->mbQuitThread ){

rd = inFile.Read( readBuf,sizeof(readBuf) );

DWORD sampleSize =  rd >> 1;

for ( DWORD i = 0 ; i < sampleSize ; i ++ ) {
pdlg->mpIncomeData[i][0] = readBuf[i];
pdlg->mpIncomeData[i][1] = 0.;
}

fftw_execute(p);

pdlg->PostMessage( FFT_MSG,0,0 );

Sleep(200);
}

//////////////////////////////////////////////////////////////////////////

fftw_destroy_plan(p);

//////////////////////////////////////////////////////////////////////////

return 0;
}

void CTestSFMLDlg::DrawSpectralLines()
{
ttl2D->Clear();
ttl2D->Display();
}


In OnPaint(), if I remove "CDialog::OnPaint();", the result is correct.

So I think when use RenderWindow with mfc, we shouldnt call base class's OnPaint() method . right  ?

Title: What's wrong with my code ?
Post by: Laurent on August 08, 2011, 03:37:50 pm

That's why we asked for a complete and minimal source code... in order to avoid wasting time with a huge amount of code which is not related to the problem ;)

Title: What's wrong with my code ?
Post by: Laurent on August 08, 2011, 03:41:03 pm

Quote

So I think when use RenderWindow with mfc, we shouldnt call base class's OnPaint() method . right ?

Yes, I don't think that you should call the base class' OnPaint() function, since you're overriding the paint event completely.

Title: What's wrong with my code ?
Post by: stng2003 on August 08, 2011, 03:43:44 pm

Quote from: "Laurent"

Yes, I don't think that you should call the base class' OnPaint() function, since you're overriding the paint event completely.

Thanx. Its my first sfml-program.  :wink: