HRESULT STDMETHODCALLTYPE CElementEvents::Invoke(DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
DISPPARAMS* pdispparams,
VARIANT* pvarResult,
EXCEPINFO* pexcepinfo,
UINT* puArgErr)
{
UNREFERENCED_PARAMETER(puArgErr);
UNREFERENCED_PARAMETER(pexcepinfo);
UNREFERENCED_PARAMETER(pvarResult);
UNREFERENCED_PARAMETER(riid);
UNREFERENCED_PARAMETER(lcid);
UNREFERENCED_PARAMETER(wFlags);
// try to get IHTMLEventObj
IDispatch* param1=NULL;
if (pdispparams->cArgs==1 && (pdispparams->rgvarg[0].vt==VT_DISPATCH))
param1=pdispparams->rgvarg[0].pdispVal;
IHTMLEventObj* pEvtObj=NULL;
if (param1)
param1->QueryInterface(IID_IHTMLEventObj, (void**)&pEvtObj);
// see HTMLElementEvents2 Dispinterface for available values (include mshtmdid.h)
// disable context menu by default (but for INPUT)
switch (dispidMember)
{
case DISPID_HTMLELEMENTEVENTS2_ONCONTEXTMENU:
if (this->bEnableContextMenu)
break;
// else
{
IHTMLElement* pHTMLElement;
BSTR String;
// get element source of event
HRESULT hr=pEvtObj->get_srcElement(&pHTMLElement);
if (SUCCEEDED(hr) && pHTMLElement)
{
// get element name
pHTMLElement->get_tagName(&String);
if (String==NULL)
String=SysAllocString(L"");
// apply for all but input
if (wcsicmp(String,L"INPUT")!=0)
{
VARIANT v;
v.vt=VT_BOOL;
v.boolVal=VARIANT_FALSE;
pEvtObj->put_returnValue(v);
}
// Free memory and release objects
SysFreeString(String);
pHTMLElement->Release();
}
}
break;
// disable selection but for input
case DISPID_HTMLELEMENTEVENTS2_ONSELECTSTART:
if (this->bEnableSelection)
break;
// else
{
IHTMLElement* pHTMLElement;
BSTR String;
// get element source of event
HRESULT hr=pEvtObj->get_srcElement(&pHTMLElement);
if (SUCCEEDED(hr) && pHTMLElement)
{
// get element name
pHTMLElement->get_tagName(&String);
if (String==NULL)
String=SysAllocString(L"");
// apply for all but input
if (wcsicmp(String,L"INPUT")!=0)
{
VARIANT v;
v.vt=VT_BOOL;
v.boolVal=VARIANT_FALSE;
pEvtObj->put_returnValue(v);
}
// Free memory and release objects
SysFreeString(String);
pHTMLElement->Release();
}
}
break;
// disable selection but for input
case DISPID_HTMLELEMENTEVENTS2_ONMOUSEOVER:
if (this->bEnableSelection || (this->pCmdTarget==NULL))
break;
// else
{
VARIANT var;
var.vt=VT_BOOL;
IHTMLElement* pHTMLElement;
BSTR String;
// get element source of event
HRESULT hr=pEvtObj->get_srcElement(&pHTMLElement);
if (SUCCEEDED(hr) && pHTMLElement)
{
// get element name
pHTMLElement->get_tagName(&String);
if (String==NULL)
String=SysAllocString(L"");
// apply for all but input, link and img
if ( (wcsicmp(String,L"INPUT")!=0)
&& (wcsicmp(String,L"A")!=0)
&& (wcsicmp(String,L"IMG")!=0)
)
{
// stop cursor automatic mode
var.boolVal = VARIANT_TRUE;
this->pCmdTarget->Exec(&CGID_MSHTML,
IDM_OVERRIDE_CURSOR,
OLECMDEXECOPT_DODEFAULT,
&var,
NULL);
// Set cursor to arrow
this->hCursorOld=::SetCursor(this->hCursorArrow);
}
// Free memory and release objects
SysFreeString(String);
pHTMLElement->Release();
}
}
break;
case DISPID_HTMLELEMENTEVENTS2_ONMOUSEOUT:
if (this->bEnableSelection || (this->pCmdTarget==NULL))
break;
// else
{
VARIANT var;
var.vt=VT_BOOL;
IHTMLElement* pHTMLElement;
BSTR String;
// get element source of event
HRESULT hr=pEvtObj->get_srcElement(&pHTMLElement);
if (SUCCEEDED(hr) && pHTMLElement)
{
// get element name
pHTMLElement->get_tagName(&String);
if (String==NULL)
String=SysAllocString(L"");
// apply for all but input, link and img
if ( (wcsicmp(String,L"INPUT")!=0)
&& (wcsicmp(String,L"A")!=0)
&& (wcsicmp(String,L"IMG")!=0)
)
{
// restore cursor automatic mode
var.boolVal = VARIANT_FALSE;
::SetCursor(this->hCursorOld);
this->pCmdTarget->Exec(&CGID_MSHTML,
IDM_OVERRIDE_CURSOR,
OLECMDEXECOPT_DODEFAULT,
&var,
NULL);
}
// Free memory and release objects
SysFreeString(String);
pHTMLElement->Release();
}
}
break;
case DISPID_HTMLELEMENTEVENTS2_ONDRAGSTART:
if (this->bEnableSelection)
break;
{
VARIANT v;
v.vt=VT_BOOL;
v.boolVal=VARIANT_FALSE;
pEvtObj->put_returnValue(v);
}
break;
}
// call callback
if (this->ElementEventsCallBack)
{
IHTMLElement* pHTMLElement;
BSTR String;
// get element source of event
HRESULT hr=pEvtObj->get_srcElement(&pHTMLElement);
if (SUCCEEDED(hr) && pHTMLElement)
{
// get element id
pHTMLElement->get_id(&String);
if (String==NULL)
String=SysAllocString(L"");
// call callback
this->ElementEventsCallBack(dispidMember,String,this->ElementEventsCallBackUserParam);
// Free memory and release objects
SysFreeString(String);
pHTMLElement->Release();
}
}
if (this->ElementEventsCallBackEx)
{
this->ElementEventsCallBackEx(dispidMember,pEvtObj,this->ElementEventsCallBackExUserParam);
}
// release IHTMLEventObj
if (pEvtObj)
pEvtObj->Release();
return S_OK;
}
IHTMLElement* FindElement(IHTMLDocument2* pDoc2, LPCTSTR elementId, LPCTSTR elementName)
{
USES_CONVERSION;
HRESULT hr;
//Enumerate the HTML elements
IHTMLElementCollection* pColl = NULL;
hr = pDoc2->get_all( &pColl );
if (hr == S_OK && pColl != NULL)
{
LONG celem;
pColl->get_length( &celem );
//Loop through each elment
for ( int i=0; i< celem; i++ )
{
VARIANT varIndex;
varIndex.vt = VT_UINT;
varIndex.lVal = i;
VARIANT var2;
VariantInit( &var2 );
IDispatch* pDisp;
hr = pColl->item( varIndex, var2, &pDisp );//Get an element
if ( hr == S_OK )
{
IHTMLElement* pElem;
//Ask for an HTMLElemnt interface
hr = pDisp->QueryInterface(IID_IHTMLElement, (void **)&pElem);
if ( hr == S_OK )
{
if(elementId != NULL) //find element by Id
{
BSTR bstr;
//Get the id of the element
pElem->get_id(&bstr);
LPCTSTR id = OLE2T(bstr);
if(_tcscmp(id, elementId))
{
return pElem;
}
}
else if(elementName != NULL) //find element by Name
{
IHTMLInputButtonElement* pButton;
hr = pDisp->QueryInterface(IID_IHTMLInputButtonElement,(void **)&pButton);
if ( hr == S_OK )
{
BSTR bstr;
//Get the name of the element
pButton->get_name(&bstr);
LPCTSTR name = OLE2T(bstr);
if(_tcscmp(name, elementName))
{
return pElem;
}
}
}
pElem->Release();
}
}
}
pColl->Release();
}
return NULL;
}
