Browser control Mozilla Activex control

作者: admin 分类: win32 发布时间: 2014-01-10 10:44 ė4,779 浏览数 61条评论

Visual C++

ActiveX controls are slightly more tricky to use from C++, however here are 3 ways you can use the control.

Subclassing CHtmlView
MFC provides a CHtmlView class which may be used to instantiate the Internet Explorer control. Since the Mozilla control is API compatible, the steps are practically identical as using CHtmlView, except for overriding the Create method.

a) Edit stdafx.h and add "#include <afxhtml.h>" to pull in the CHtmlView class.

b) Derive your view class from CHtmlView and replace all calls to CView in your class to CHtmlView, e.g. in the IMPLEMENT_DYNCREATE macros and elsewhere.

c) Override the default Create method of CHtmlView with your own:

In the .h file add:

public:

    virtual BOOL Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName,

    DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID,

    CCreateContext* pContext = NULL);
In the .cpp file add:

BOOL CHtmlView::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName,

						DWORD dwStyle, const RECT& rect, CWnd* pParentWnd,

						UINT nID, CCreateContext* pContext)

{

    // create the view window itself

    m_pCreateContext = pContext;

    if (!CView::Create(lpszClassName, lpszWindowName,

    dwStyle, rect, pParentWnd, nID, pContext))

    {

        return FALSE;

    }

    AfxEnableControlContainer();

    RECT rectClient;

    GetClientRect(&rectClient);

    const CLSID CLSID_MozillaBrowser = { 0x1339B54C, 0x3453, 0x11D2,

        { 0x93, 0xB9, 0x00, 0x00,

          0x00, 0x00, 0x00, 0x00 } };

    // create the control window

    // AFX_IDW_PANE_FIRST is a safe but arbitrary ID

    if (!m_wndBrowser.CreateControl(CLSID_MozillaBrowser, lpszWindowName,

        WS_VISIBLE | WS_CHILD, rectClient, this, AFX_IDW_PANE_FIRST))

    {

        DestroyWindow();

        return FALSE;

    }

    LPUNKNOWN lpUnk = m_wndBrowser.GetControlUnknown();

    HRESULT hr = lpUnk->QueryInterface(IID_IWebBrowser2, (void**) &m_pBrowserApp);

    if (!SUCCEEDED(hr))

    {

        m_pBrowserApp = NULL;

        m_wndBrowser.DestroyWindow();

        DestroyWindow();

        return FALSE;

    }

    return TRUE;

}
Note that this code is practically identical to the code in the CHtmlView::Create method, the only change is that  CLSID_MozillaBrowser is defined and supplied to the call to CreateControl instead of CLSID_WebBrowser (IE).

d) In your view's OnInitialUpdate add a line such as this to see it working!

Navigate2(_T("http://www.mozilla.org/"), 0, _T(""));
Important Note: The CHtmlView::Navigate2 class calls IWebBrowser::Navigate with a target frame variant containing VT_BSTR and a NULL string value. Versions of the Mozilla control prior to Mozilla 1.3 did not like this and would crash, so specify the target as _T("") instead of NULL.

Here is a sample application that uses CHtmlView.

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Visual C++

ActiveX controls are slightly more tricky to use from C++, however here are 3 ways you can use the control.

Subclassing CHtmlView

MFC provides a CHtmlView class which may be used to instantiate the Internet Explorer control. Since the Mozilla control is API compatible, the steps are practically identical as using CHtmlView, except for overriding the Create method.

a) Edit stdafx.h and add "#include <afxhtml.h>" to pull in the CHtmlView class.

b) Derive your view class from CHtmlView and replace all calls to CView in your class to CHtmlView, e.g. in the IMPLEMENT_DYNCREATE macros and elsewhere.

c) Override the default Create method of CHtmlView with your own:

In the .h file add:

public:

virtual BOOL Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName,

DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID,

CCreateContext* pContext = NULL);

In the .cpp file add:

BOOL CHtmlView::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName,

DWORD dwStyle, const RECT& rect, CWnd* pParentWnd,

UINT nID, CCreateContext* pContext)

{

// create the view window itself

m_pCreateContext = pContext;

if (!CView::Create(lpszClassName, lpszWindowName,

dwStyle, rect, pParentWnd, nID, pContext))

{

return FALSE;

}

AfxEnableControlContainer();

RECT rectClient;

GetClientRect(&rectClient);

const CLSID CLSID_MozillaBrowser = { 0x1339B54C, 0x3453, 0x11D2,

{ 0x93, 0xB9, 0x00, 0x00,

0x00, 0x00, 0x00, 0x00 } };

// create the control window

// AFX_IDW_PANE_FIRST is a safe but arbitrary ID

if (!m_wndBrowser.CreateControl(CLSID_MozillaBrowser, lpszWindowName,

WS_VISIBLE | WS_CHILD, rectClient, this, AFX_IDW_PANE_FIRST))

{

DestroyWindow();

return FALSE;

}

LPUNKNOWN lpUnk = m_wndBrowser.GetControlUnknown();

HRESULT hr = lpUnk->QueryInterface(IID_IWebBrowser2, (void**) &m_pBrowserApp);

if (!SUCCEEDED(hr))

{

m_pBrowserApp = NULL;

m_wndBrowser.DestroyWindow();

DestroyWindow();

return FALSE;

}

return TRUE;

}

Note that this code is practically identical to the code in the CHtmlView::Create method, the only change is that CLSID_MozillaBrowser is defined and supplied to the call to CreateControl instead of CLSID_WebBrowser (IE).

d) In your view's OnInitialUpdate add a line such as this to see it working!

Navigate2(_T("http://www.mozilla.org/"), 0, _T(""));

Important Note: The CHtmlView::Navigate2 class calls IWebBrowser::Navigate with a target frame variant containing VT_BSTR and a NULL string value. Versions of the Mozilla control prior to Mozilla 1.3 did not like this and would crash, so specify the target as _T("") instead of NULL.

Here is a sample application that uses CHtmlView.

http://www.adamlock.com/mozilla/control.htm#usingC

http://www.adamlock.com/mozilla/control.htm#download