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An Image Decoder Based on IImgCtx

, 25 May 2004
This article shows how to decode image with IImgCtx interface provided by IE
// ImgViewer.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "ImgViewer.h"

#include "MainFrm.h"
#include "ImgViewerDoc.h"
#include "ImgViewerView.h"
#include "DirMng.h"

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

/////////////////////////////////////////////////////////////////////////////
// CImgViewerApp

BEGIN_MESSAGE_MAP(CImgViewerApp, CWinApp)
	//{{AFX_MSG_MAP(CImgViewerApp)
	ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
	ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
	//}}AFX_MSG_MAP
	// Standard file based document commands
	// Standard print setup command
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CImgViewerApp construction

CImgViewerApp::CImgViewerApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CImgViewerApp object

CImgViewerApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CImgViewerApp initialization

BOOL CImgViewerApp::InitInstance()
{
	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	// Change the registry key under which our settings are stored.
	// TODO: You should modify this string to be something appropriate
	// such as the name of your company or organization.
	SetRegistryKey(_T("Local AppWizard-Generated Applications"));

	LoadStdProfileSettings();  // Load standard INI file options (including MRU)

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views.

	CSingleDocTemplate* pDocTemplate;
	pDocTemplate = new CSingleDocTemplate(
		IDR_MAINFRAME,
		RUNTIME_CLASS(CImgViewerDoc),
		RUNTIME_CLASS(CMainFrame),       // main SDI frame window
		RUNTIME_CLASS(CImgViewerView));
	AddDocTemplate(pDocTemplate);

	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);

	// Dispatch commands specified on the command line
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The one and only window has been initialized, so show and update it.
	m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
	m_pMainWnd->UpdateWindow();

	return TRUE;
}


/////////////////////////////////////////////////////////////////////////////
// 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)
		// No message handlers
	//}}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()

// App command to run the dialog
void CImgViewerApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

/////////////////////////////////////////////////////////////////////////////
// CImgViewerApp message handlers

char c_szFilter[] = "Supported Files|*.jpg;*.jpeg;*.gif;*.bmp;*.dib;*.png;*.tif;*.tiff;*.wmf;*.emf;*.ico|Jpeg Files(*.jpg)|*.jpg|Gif Files(*.gif)|*.gif|Png Files(*.png)|*.png|Tiff Files(*.tif)|*.tif;*.tiff|Wmf Files(*.wmf)|*.wmf;*.emf|Icon Files(*.ico)|*.ico|Bmp Files(*.bmp)|*.bmp|All Files(*.*)|*.*||";

void CImgViewerApp::OnFileOpen() 
{
	// TODO: Add your command handler code here
	CFileDialog dlg(TRUE, NULL, NULL,  
    				OFN_FILEMUSTEXIST|OFN_HIDEREADONLY,
    				c_szFilter,
    				 m_pMainWnd);
	
	if (dlg.DoModal() != IDOK)
		return;

	g_DirManager.OpenFileInDir(dlg.GetPathName());
	((CMainFrame*)m_pMainWnd)->OpenFile(dlg.GetPathName());
}

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About the Author

strnghrs
Web Developer
China China
No Biography provided

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