C / C++ / MFC

try
{
    // do something
}
catch( CDBException dbException )
{
}
catch( CMemoryException memException )
{
}
catch( CResourceException resException )
{
}
catch(...)
{
}

ForNow wrote:

for a memory exception I would have to have a derived class of CMemoryException
e.g
 
class Mymemoryexception : public CMemoryException

while(!enough) {
    do whatever is needed for monitoring
    wait a while
}

ytubis wrote:

do you know how to detach the thread from the process?

ytubis wrote:

if nothing changes we will still sleep on the IO forever

if (evt = CV_EVENT_LBUTTONDBLCLK)

if (evt == CV_EVENT_LBUTTONDBLCLK)

SoMad wrote:

...but you should fix it and see if that solves your problem.

jawadali477 wrote:

the handle

HWND m_hWnd;

is defined at beginning where the header files are included (i might be doing it wrong since i'm not good at programming with handle).

#include "stdafx.h"
#include "opencv01.h"
#include "opencv01Dlg.h"
#include "highgui.h"
#include "afxwin.h"
#include "cv.h"
#include "math.h"
#include<stdlib.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

void on_mouse( int evt, int x, int y, int flags, void* param );    //defining mouse event
HWND hwnd;   //defining handle

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

	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

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()

Copencv01Dlg::Copencv01Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(Copencv01Dlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void Copencv01Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(Copencv01Dlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


// Copencv01Dlg message handlers

BOOL Copencv01Dlg::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);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	
	AfxBeginThread(MyThreadProc, this); //calling thread

	return TRUE;  // return TRUE  unless you set the focus to a control
}


UINT Copencv01Dlg::MyThreadProc(LPVOID pParam)
    {
     Copencv01Dlg * me = (Copencv01Dlg *)pParam;
     me->MyThreadProc();
     return TRUE;
    }


void Copencv01Dlg::MyThreadProc()
{ 
	//image initialization
	
	IplImage* img = cvLoadImage("box.png", CV_WINDOW_AUTOSIZE);
		cvNamedWindow("map", 0);
		cvShowImage("map", img);

                cvSetMouseCallback("map", on_mouse, NULL);     //calling mouse function

                cvWaitKey(0);
                cvReleaseImage(&img);
		cvDestroyWindow("map");
	
}


void Copencv01Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}
void Copencv01Dlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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();
	}
}

HCURSOR Copencv01Dlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void on_mouse( int evt, int x, int y, int flags, void* param )
{
	CString xaxis, yaxis;

		if (evt == CV_EVENT_LBUTTONDBLCLK)
	{
		
			xaxis.Format(_T("%d"), x);
			yaxis.Format(_T("%d"), y);
			SetDlgItemText(hwnd, IDC_Blue, xaxis);
			SetDlgItemText(hwnd, IDC_Green, yaxis);
	}

}