Re: CHtmlView printing in CDialog?

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 6 Aug 2008 16:23:12 -0500

Message-ID:

<%Comk.16464$xZ.17@nlpi070.nbdc.sbc.com>

Are sure that the page is loaded before you try to print it? Also are you
making sure that the HTML file is available all the way through the print
process?

If your Navigate call is in the same method as your OnFilePrint call then
the page is not loaded as the CHTMLView hasn't received enough cpu time to
load the page. What you have to do is call CHtmlView::GetReadyState() in a
loop and pump messages until it is done loading.

   m_pPrintView->Navigate2(Filename);

   while (m_pPrintView->GetReadyState() != READYSTATE_COMPLETE)
   {
      ((CMyApp *)AfxGetApp())->Yeild();
   }

   m_pPrintView->OnFilePrint();

void CMyApp::Yeild()
{
MSG Msg;

   while (PeekMessage(&Msg,NULL,0,0,PM_REMOVE))
   {
      if (!PreTranslateMessage(&Msg))
      {
         TranslateMessage(&Msg);
         DispatchMessage(&Msg);
      }
   }
}

I also found out that if the file is deleted before the printing is done
then only a partial page is printed. Since there is on way to findout if
the printing is done or not, I keep track of the files and delete them when
the application exits.

AliR.

"rockdale" <rockdale.green@gmail.com> wrote in message
news:74654e7c-81cf-483c-ad09-80719aed5271@s50g2000hsb.googlegroups.com...

Hi, all:

I tried to load an html file into a CHtmlView control on CDialog and
print it out. I dynamic create the CHtmlView in the OnInitDialog
event and the CHtmlView load the htm file successfully. But I has
problems to print the html to a printer?

I tried :
pView->ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DODEFAULT, NULL, NULL); it
does nothing.

pView->OnFilePrint(); it print an empty page. (The html should print 9
pages)

I also tried:

   LPOLECOMMANDTARGET lpTarget = NULL;
   LPDISPATCH lpDisp = pView->GetHtmlDocument();

   if (lpDisp != NULL)
   {
             // the control will handle all printing UI

        if (SUCCEEDED(lpDisp->QueryInterface(IID_IOleCommandTarget,
                  (LPVOID*) &lpTarget)))
        {
             lpTarget->Exec(NULL, OLECMDID_PRINT, 0, NULL, NULL);
             lpTarget->Release();
        }
        lpDisp->Release();
   }

It print an empty page.

But if I added pView->OnFilePrint(); 2 printer dialog popup and it
will print an empty page plus the 9 pages of html.

Anyone can help me with this problem?

Following is the code

BOOL CHtmlViewDlg::OnInitDialog()
{

CString strAppPath = AfxGetApp()->m_pszHelpFilePath;
strAppPath = strAppPath.Left(strAppPath.ReverseFind('\\'));
RECT rc;
GetClientRect(&rc);
CFrameWnd * pfrm = (CFrameWnd*) RUNTIME_CLASS(CFrameWnd)-

CreateObject();

pfrm->Create(NULL, NULL, WS_CHILD | WS_VISIBLE, rc, this);
CCreateContext pContext;
pContext.m_pNewViewClass = RUNTIME_CLASS(CHtmlView);
CHtmlView *pView = (CHtmlView *) pfrm->CreateView(&pContext);
if(!pView)
{
//IE4 probably not installed, view couldn't be created
//Just open the HTML document with the standard HTML viewer
ShellExecute(m_hWnd, _T("open"), strAppPath + _T("\\print.htm"),
NULL, NULL, SW_MAXIMIZE);
EndDialog(IDCANCEL);//without HTML page the dialog is useless,
destroy it
return FALSE;
}
pView->Navigate(strAppPath + _T("\\print.htm"));

//pView->ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DODEFAULT, NULL, NULL);

LPOLECOMMANDTARGET lpTarget = NULL;
   LPDISPATCH lpDisp = pView->GetHtmlDocument();

   if (lpDisp != NULL)
   {
        if (SUCCEEDED(lpDisp->QueryInterface(IID_IOleCommandTarget,
                  (LPVOID*) &lpTarget)))
        {
             lpTarget->Exec(NULL, OLECMDID_PRINT, 0, NULL, NULL);
             lpTarget->Release();
        }
        lpDisp->Release();
   }

// pView->OnFilePrint();
return TRUE;
}

--------------------
thanks in advance
-rockdale

-------------------