[英]How could I use IProtectFocus to keep CDHtmlDialog navigate from drawing focus from editBox?
我知道IProtectFocus接口的AllowFocusChange函數可以解決CDHtmlDialog執行navigation()函數時的“焦點竊取問題”,但是我不太清楚如何在我的代碼中實現IProtectFocus函數。 有人可以幫我嗎? 任何代碼示例都非常感謝。
更多詳細信息,我可以實現IInternetSecurityManager接口來解決javascript ActiveX授權問題。 但是我嘗試用同樣的方法來實現IProtectFocus,不起作用。 我只需要C ++代碼,謝謝!
我的代碼示例:(CCustomControlSite是自定義的IWebBrowser控件,CInstantAnswerDlg是CDHtmlDialog。)
MFC接口部分:
class CCustomControlSite: public COleControlSite
{
public:
CCustomControlSite(COleControlContainer *pCnt):COleControlSite(pCnt){}
protected:
DECLARE_INTERFACE_MAP();
// Implement IServiceProvider
BEGIN_INTERFACE_PART(ServiceProvider, IServiceProvider)
STDMETHOD(QueryService)(REFGUID,REFIID,void**);
END_INTERFACE_PART(ServiceProvider)
// Implement IServiceProvider
BEGIN_INTERFACE_PART(ProtectFocus, IProtectFocus)
STDMETHOD(AllowFocusChange)(BOOL *);
END_INTERFACE_PART(ProtectFocus)
};
實施部分:
ULONG FAR EXPORT CCustomControlSite::XServiceProvider::AddRef()
{
METHOD_PROLOGUE(CCustomControlSite, ServiceProvider)
return pThis->ExternalAddRef();
}
ULONG FAR EXPORT CCustomControlSite::XServiceProvider::Release()
{
METHOD_PROLOGUE(CCustomControlSite, ServiceProvider)
return pThis->ExternalRelease();
}
HRESULT FAR EXPORT CCustomControlSite::XServiceProvider::QueryInterface(REFIID riid,void** ppvObj)
{
METHOD_PROLOGUE(CCustomControlSite, ServiceProvider)
HRESULT hr = (HRESULT)pThis->ExternalQueryInterface(&riid, ppvObj);
return hr;
}
STDMETHODIMP CCustomControlSite::XServiceProvider::QueryService(REFGUID guidService,REFIID riid,void** ppvObject)
{
if (guidService == SID_SInternetSecurityManager &&
riid == IID_IInternetSecurityManager)
{
METHOD_PROLOGUE(CCustomControlSite, ServiceProvider)
HRESULT hr = (HRESULT)pThis->ExternalQueryInterface(&riid, ppvObject);
return hr;
}
else
{
*ppvObject = NULL;
}
return E_NOINTERFACE;
}
// ProtectFocus Methods
ULONG FAR EXPORT CCustomControlSite::XProtectFocus::AddRef()
{
METHOD_PROLOGUE(CCustomControlSite, ProtectFocus)
return pThis->ExternalAddRef();
}
ULONG FAR EXPORT CCustomControlSite::XProtectFocus::Release()
{
METHOD_PROLOGUE(CCustomControlSite, ProtectFocus)
return pThis->ExternalRelease();
}
HRESULT FAR EXPORT CCustomControlSite::XProtectFocus::QueryInterface(REFIID riid,void** ppvObj)
{
METHOD_PROLOGUE(CCustomControlSite, ProtectFocus)
HRESULT hr = (HRESULT)pThis->ExternalQueryInterface(&riid, ppvObj);
return hr;
}
STDMETHODIMP CCustomControlSite::XProtectFocus::AllowFocusChange(BOOL *pfAllow)
{
*pfAllow = FALSE;
return S_OK;
}
將控件添加到CDHtmlDialog:
BOOL CInstantAnswerDlg::CreateControlSite(COleControlContainer* pContainer,COleControlSite** ppSite,UINT /* nID */,REFCLSID /* clsid */ )
{
if(ppSite == NULL)
{
ASSERT(FALSE);
return FALSE;
}
m_pCustSite = m_insAnswerManager->CreateSite(pContainer);
if (!m_pCustSite)
return FALSE;
*ppSite = m_pCustSite;
return TRUE;
}
問題是XProtectFocus :: QueryInterface和XProtectFocus :: AllowFocusChange函數都不會被調用,而XServiceProvider :: QueryInterface可能會被調用。 我在哪里錯了?
IProtectFocus和IInternetSecurityManager的實現放置位置取決於QueryService的實現。 由於您在實現中調用CCustomControlSite :: ExternalQueryInterface,因此需要在CCustomControlSite類上添加接口映射宏 。
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