SftPrintPreview/DLL 2.0 - Print Preview Control for C/C++

PreviewRichEdit Sample (C++/MFC)

This sample illustrates RichEdit control output.

The source code is located at C:\Program Files (x86)\Softelvdm\SftPrintPreview DLL 2.0\Samples\MFC\PreviewRichEdit\PreviewRichEditDlg.cpp or C:\Program Files\Softelvdm\SftPrintPreview DLL 2.0\Samples\MFC\PreviewRichEdit\PreviewRichEditDlg.cpp (on 32-bit Windows versions).

#include "stdafx.h"

CPreviewRichEditDlg::CPreviewRichEditDlg(CWnd* pParent /*=NULL*/)
    : CDialog(CPreviewRichEditDlg::IDD, pParent)
{
    //{{AFX_DATA_INIT(CPreviewRichEditDlg)
    //}}AFX_DATA_INIT
    // Note that LoadIcon does not require a subsequent DestroyIcon in Win32
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPreviewRichEditDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);

    DDX_Control(pDX, IDC_RICHEDIT, m_Edit);

    //{{AFX_DATA_MAP(CPreviewRichEditDlg)
    //}}AFX_DATA_MAP
}

/*static*/ DWORD CALLBACK CPreviewRichEditDlg::EditStreamCallback(SFTPRINTPREVIEW_DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
    HANDLE hFile = (HANDLE) dwCookie;
    DWORD dwdRead = 0;

    if (ReadFile(hFile, pbBuff, cb, &dwdRead, NULL)) {
        //_ASSERT(cb == dwdRead);
        *pcb = dwdRead;
        return 0;
    }
    return -1;
}

void CPreviewRichEditDlg::LoadEditControlWithFile(const CString& strFileName)
{
    HANDLE hFile = CreateFile(strFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile != INVALID_HANDLE_VALUE) {

        CWaitCursor wait;

        m_Edit.SetWindowText(TEXT("Loading ..."));
        ShowWindow(SW_SHOW);
        UpdateWindow();

        EDITSTREAM es;
        es.dwCookie = (SFTPRINTPREVIEW_DWORD_PTR) hFile; // use our file handle as cookie
        es.dwError = 0;
        es.pfnCallback = EditStreamCallback;
        m_Edit.StreamIn(SF_RTF, es); // load file
        CloseHandle(hFile);
    }
}

void CPreviewRichEditDlg::LoadEditControl()
{
    CFileDialog fd(TRUE, NULL, NULL, 
        OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_PATHMUSTEXIST,
        _T("RTF Files (*.rtf)|*.rtf||"), this);
    if (fd.DoModal() == IDOK)
        LoadEditControlWithFile(fd.GetPathName());
    else {
        DWORD dwd = CommDlgExtendedError();
        if (dwd != 0)
            _ASSERT(0);
    }
}

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

    CenterWindow();

    // 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
    
    // load Loading... text into edit control
    m_Edit.LimitText(0x7fffffff);//need all the space we can get

    // Load contents
    LoadEditControlWithFile(CString(_T("SftPrintPreview.rtf")));

    m_Edit.SetFocus();
    m_Edit.SetSel(0, 0);
    return FALSE;
}

// 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 CPreviewRichEditDlg::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 CPreviewRichEditDlg::OnQueryDragIcon()
{
    return (HCURSOR) m_hIcon;
}

void CPreviewRichEditDlg::OnLoadfileClicked() 
{
    LoadEditControl();
}

void CPreviewRichEditDlg::OnPreviewClicked() 
{
    CPreviewDialog pd;
    pd.DoModal(&m_Edit);
}

BEGIN_MESSAGE_MAP(CPreviewRichEditDlg, CDialog)
    //{{AFX_MSG_MAP(CPreviewRichEditDlg)
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDC_LOADFILE, OnLoadfileClicked)
    ON_WM_SYSCOMMAND()
    ON_BN_CLICKED(IDC_PREVIEW, OnPreviewClicked)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()