Refer to http://blog.csdn.net/watkinsong/article/details/7360941

//Fire2Dlg. CPP: implementation file 
//

# include "stdafx. H" 
# include "Fire2. H" 
# include "Fire2Dlg. H" 
# include "afxdialogex. H" 
# include "CvvImage. H" 

# ifdef _DEBUG 
# define new DEBUG_NEW 
# endif 

CvCapture * capture; 
HDC HDC. 
The CDC * pDC. 
The CWnd * PWND. 
CRect the rect. 
IplImage * fireImage; 
CvvImage m_CvvImage; 
IplImage * frame; 

//for application "about" menu item CAboutDlg dialog 

The class CAboutDlg: public CDialogEx 
{
Public: 
CAboutDlg (); 

//data dialog 
# ifdef AFX_DESIGN_TIME 
Enum {IDD=IDD_ABOUTBOX}; 
# endif 

Protected: 
Virtual void DoDataExchange (CDataExchange * symbol;//support DDX/DDV 

//implementation 
Protected: 
DECLARE_MESSAGE_MAP () 
}; 

CAboutDlg: : CAboutDlg () : CDialogEx (IDD_ABOUTBOX) 
{
} 

Void CAboutDlg: : DoDataExchange (CDataExchange * symbol) 
{
CDialogEx: : DoDataExchange (symbol); 
} 

BEGIN_MESSAGE_MAP (CAboutDlg CDialogEx) 
END_MESSAGE_MAP () 


//CFire2Dlg dialog 



CFire2Dlg: : CFire2Dlg (pParent/*=NULL CWnd * */) 
: CDialogEx (IDD_FIRE2_DIALOG, pParent) 
{
M_hIcon=AfxGetApp () - & gt; LoadIcon (IDR_MAINFRAME); 
} 

Void CFire2Dlg: : DoDataExchange (CDataExchange * symbol) 
{
CDialogEx: : DoDataExchange (symbol); 
} 

BEGIN_MESSAGE_MAP (CFire2Dlg CDialogEx) 
ON_WM_SYSCOMMAND () 
ON_WM_PAINT () 
ON_WM_QUERYDRAGICON () 
ON_BN_CLICKED (IDC_Camera, & amp; CFire2Dlg: : OnBnClickedCamera) 
ON_WM_TIMER () 
END_MESSAGE_MAP () 


//CFire2Dlg message handler 

BOOL CFire2Dlg: : OnInitDialog () 
{
CDialogEx: : OnInitDialog (); 

//will "about... "Menu item added to the system menu, 

//IDM_ABOUTBOX must be in the system command range, 
ASSERT ((IDM_ABOUTBOX & amp; 0==IDM_ABOUTBOX xfff0)); 
ASSERT (IDM_ABOUTBOX & lt; 0 xf000); 

CMenu * pSysMenu=GetSystemMenu (FALSE); 
If (pSysMenu!=NULL) 
{
BOOL bNameValid; 
Cstrings strAboutMenu; 
BNameValid=strAboutMenu. LoadString (IDS_ABOUTBOX); 
ASSERT (bNameValid); 
if (! StrAboutMenu. IsEmpty ()) 
{
PSysMenu - & gt; The AppendMenu (MF_SEPARATOR); 
PSysMenu - & gt; AppendMenu (MF_STRING IDM_ABOUTBOX, strAboutMenu); 
} 
} 

//set this dialog ICONS, when the application is the main window is not a dialog, the framework will automatically 
//do this 
SetIcon (m_hIcon, TRUE);//set the large icon 
SetIcon (m_hIcon, FALSE);//set the small icon 

ShowWindow (SW_MINIMIZE); 

//TODO: add additional initialization code in the 
PWND=GetDlgItem (IDC_STATIC); 
This - & gt; MoveWindow (410, 160, 765, 598); 
PWND - & gt; MoveWindow (24, 85, 526, 416); 

PDC=PWND - & gt; GetDC (); 
HDC=pDC - & gt; GetSafeHdc (); 
PWND - & gt; GetClientRect (& amp; The rect); 

return TRUE;//unless set focus to the control, return TRUE 
} 

Void CFire2Dlg: : OnSysCommand (UINT nID, LPARAM LPARAM) 
{
If ((nID & amp; 0 xfff0)==IDM_ABOUTBOX) 
{
CAboutDlg dlgAbout; 
DlgAbout. DoModal (); 
} 
The else 
{
CDialogEx: : OnSysCommand (nID, lParam); 
} 
} 

//if the dialog box to add a minimize button, you need the following code 
//to draw the icon, to use the document/view model of MFC application, 
//it will be done automatically by the framework, 

Void CFire2Dlg: : OnPaint () 
{
If (IsIconic ()) 
{
CPaintDC dc (this);//for drawing device context 

The SendMessage (WM_ICONERASEBKGND, reinterpret_cast & lt; WPARAM> (dc) GetSafeHdc ()), 0); 

//make the icon is centered within the workspace rectangular 
Int cxIcon=GetSystemMetrics (SM_CXICON); 
Int cyIcon=GetSystemMetrics (SM_CYICON); 
CRect the rect. 
GetClientRect (& amp; The rect); 
Int x=(the rect. Width () - cxIcon + 1)/2; 
Int y=(the rect. Height () - cyIcon + 1)/2; 

//draw the icon 
Dc. DrawIcon (x, y, m_hIcon); 
} 
The else 
{
CDialogEx: : OnPaint (); 
} 
} 

//when the user drag minimize window system call this function to obtain the cursor 
//show, 
HCURSOR CFire2Dlg: : OnQueryDragIcon () 
{
Return static_cast & lt; HCURSOR> (m_hIcon); 
} 



Void CFire2Dlg: : OnBnClickedCamera () 
{
//TODO: add the control notification handler code 
The capture=0; 
The capture=cvCaptureFromCAM (0);//0 represents the computer itself camera, 1, 2, 3, 4,,,,,,,, on behalf of the external camera 
IplImage * frame=cvQueryFrame (capture); 
M_CvvImage. CopyOf (frame, 1); 
M_CvvImage. DrawToHDC (hDC, & amp; The rect); 
The SetTimer (2, 40, NULL); 
} 


Void CFire2Dlg: : OnTimer (UINT_PTR nIDEvent) 
{


CRect rc; 
The CWnd * pWnd=GetDlgItem (IDC_STATIC); 
PWnd - & gt; GetClientRect (rc); 
IplImage * frame=cvQueryFrame (capture); 
M_CvvImage. CopyOf (frame, 1); 
M_CvvImage. DrawToHDC (hDC, & amp; The rect); 


CDialogEx: : OnTimer (nIDEvent); 
} 

CodePudding user response:

Set in the device manager enabled cameras,
Please check the return values of each function call

CodePudding user response:

Isn't display images, how to know opened? In addition you display content camera code? Imshow?

CodePudding user response:

Look your Debug debugging, which function failed? Or make a breakpoint, look at the key functions performed? Where or failed?