sthtmldialog.cpp

evc开发html的c++库文件,一个非常不错的库代码信息..很值得研究

// STHtmlDialog.cpp : implementation file
//
#include "stdafx.h"
#include "resource.h"
#include "STHtmlDialog.h"
#include <Htmlctrl.h>

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

/////////////////////////////////////////////////////////////////////////////
// CSTHtmlDialog dialog

HINSTANCE CSTHtmlDialog::m_HtmlViewInstance = 0;

CSTHtmlDialog::CSTHtmlDialog(UINT nIDTemplate, CWnd* pParentWnd)
	: CDialog(nIDTemplate, pParentWnd)
{
	//{{AFX_DATA_INIT(CSTHtmlDialog)
	//}}AFX_DATA_INIT
}


BEGIN_MESSAGE_MAP(CSTHtmlDialog, CDialog)
	//{{AFX_MSG_MAP(CSTHtmlDialog)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSTHtmlDialog message handlers

BOOL CSTHtmlDialog::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	CreateHtmlWindow();
	
	return TRUE;
}

void CSTHtmlDialog::CreateHtmlWindow()
{
	if (m_HtmlViewInstance == 0) {
		m_HtmlViewInstance = ::LoadLibrary(L"htmlview.dll");
	}

	VERIFY(InitHTMLControl(AfxGetInstanceHandle()));
	
	DWORD dwStyle = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
	RECT rect;
	GetClientRect(&rect);
	m_hwndHtml = ::CreateWindow (DISPLAYCLASS, 
                                 NULL,
                                 dwStyle,
                                 rect.left, 
                                 rect.top, 
                                 rect.right, 
                                 rect.bottom,
                                 m_hWnd, 
                                 0, 
                                 m_HtmlViewInstance, 
                                 NULL);

	::SetWindowLong(m_hwndHtml, GWL_ID, 12321);
	::SetFocus (m_hwndHtml);
	::SendMessage(m_hwndHtml, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)_T("")); 

}

void CSTHtmlDialog::SetHtml(const CString &strHtml)
{
	::SendMessage(m_hwndHtml, WM_SETTEXT, 0, (LPARAM)(LPCTSTR)_T(""));
	::SendMessage(m_hwndHtml, DTM_ADDTEXTW, FALSE, (LPARAM)(LPCTSTR)strHtml);
	::SendMessage(m_hwndHtml, DTM_ENDOFSOURCE, 0, 0);
}

LRESULT CSTHtmlDialog::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	switch(message)
	{
	case WM_NOTIFY:
			NM_HTMLVIEW * pnmHTML = (NM_HTMLVIEW *) lParam;
			LPNMHDR pnmh = (LPNMHDR) &(pnmHTML->hdr);
			CString strReg = _T("register");

			switch(pnmh->code)
      
			{
			case NM_HOTSPOT:
				OnLink(pnmHTML->szTarget);
				break;
			case NM_INLINE_IMAGE:
				CString strSrcText = pnmHTML->szTarget;
				DWORD dwCookieValue = pnmHTML->dwCookie;

				CBitmap* pBitmap;
				if (! m_imagesCache.Lookup(strSrcText, (CObject*&)pBitmap)) {
					::SendMessage(m_hwndHtml, DTM_IMAGEFAIL, 0, (LPARAM)(LPINLINEIMAGEINFO)dwCookieValue);
					break;
				}
				INLINEIMAGEINFO imageInfo;
				imageInfo.dwCookie = dwCookieValue;
				imageInfo.bOwnBitmap = FALSE;
				imageInfo.hbm = (HBITMAP)(*pBitmap);
				CSize size = pBitmap->GetBitmapDimension();
				imageInfo.iOrigWidth = size.cx;
				imageInfo.iOrigHeight = size.cy;
				::SendMessage(m_hwndHtml, DTM_SETIMAGE, 0, (LPARAM)(LPINLINEIMAGEINFO)&imageInfo);
				CString data;
				data.Format(L"Image width=%d, height=%d, pBitmap=%p, pic name=%s", size.cx, size.cy, pBitmap, (LPCTSTR)strSrcText);
				break;
			}
	}
	
	return CDialog::WindowProc(message, wParam, lParam);
}

void CSTHtmlDialog::RegisterHtmlImage(int nResourceId, const CString &strHtmlImageName)
{
	CBitmap* pBitmap = new CBitmap();
	pBitmap->LoadBitmap(nResourceId);
	m_imagesCache.SetAt(strHtmlImageName, (CObject*)pBitmap);
}

void CSTHtmlDialog::RegisterHtmlImage(CBitmap *pBitmap, const CString &strHtmlImageName)
{
	m_imagesCache.SetAt(strHtmlImageName, (CObject*)pBitmap);
}

void CSTHtmlDialog::DeleteHtmlImages()
{
	POSITION pos = m_imagesCache.GetStartPosition();
	CString key;
	CBitmap* bmp;
	while (pos != NULL) {
		m_imagesCache.GetNextAssoc(pos, key, (CObject*&)bmp);
		delete bmp;
		m_imagesCache.RemoveKey(key);
	}
}

void CSTHtmlDialog::OnLink(const CString &strHref)
{
	MessageBox(strHref, _T("Link is clicked"), MB_OK);
}