Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Allow wxAutomationObject::GetInstance() create new instance if needed.

Browse Source 
When getting an instance of an OLE automation object, it is often useful to
connect to the existing instance if any or start a new one otherwise. Make
GetInstance() behave like this by default while still allowing to use the
wxAutomationInstance_UseExistingOnly flag to reestablish the old behaviour.

Also improve the error reporting in wxAutomationObject.

See #12489.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66262 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2010-11-26 13:30:37 +00:00
parent 27d7687903
commit 6eefca4fb7
5 changed files with 152 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files

147
src/msw/ole/automtn.cpp
View File

@@ -56,12 +56,12 @@
#if wxUSE_OLE_AUTOMATION
// Report an OLE error to the user via wxLog.
// Report an OLE error when calling the specified method to the user via wxLog.
static void
ShowException(const wxString& member,
HRESULT hr,
EXCEPINFO *pexcep,
unsigned int uiArgErr);
EXCEPINFO *pexcep = NULL,
unsigned int uiArgErr = 0);
// wxAutomationObject
@@ -147,7 +147,7 @@ bool wxAutomationObject::Invoke(const wxString& member, int action,
1 + namedArgCount, LOCALE_SYSTEM_DEFAULT, dispIds);
if (FAILED(hr))
{
ShowException(member, hr, NULL, 0);
ShowException(member, hr);
delete[] argNames;
delete[] dispIds;
return false;
@@ -489,40 +489,78 @@ bool wxAutomationObject::GetObject(wxAutomationObject& obj, const wxString& prop
return false;
}
namespace
{
HRESULT wxCLSIDFromProgID(const wxString& progId, CLSID& clsId)
{
HRESULT hr = CLSIDFromProgID(wxBasicString(progId), &clsId);
if ( FAILED(hr) )
{
wxLogSysError(hr, _("Failed to find CLSID of \"%s\""), progId);
}
return hr;
}
void *DoCreateInstance(const wxString& progId, const CLSID& clsId)
{
// get the server IDispatch interface
//
// NB: using CLSCTX_INPROC_HANDLER results in failure when getting
// Automation interface for Microsoft Office applications so don't use
// CLSCTX_ALL which includes it
void *pDispatch = NULL;
HRESULT hr = CoCreateInstance(clsId, NULL, CLSCTX_SERVER,
IID_IDispatch, &pDispatch);
if (FAILED(hr))
{
wxLogSysError(hr, _("Failed to create an instance of \"%s\""), progId);
return NULL;
}
return pDispatch;
}
} // anonymous namespace
// Get a dispatch pointer from the current object associated
// with a ProgID
bool wxAutomationObject::GetInstance(const wxString& progId) const
bool wxAutomationObject::GetInstance(const wxString& progId, int flags) const
{
if (m_dispatchPtr)
return false;
HRESULT hr;
CLSID clsId;
IUnknown * pUnk = NULL;
wxBasicString unicodeName(progId);
hr = CLSIDFromProgID((BSTR) unicodeName, &clsId);
HRESULT hr = wxCLSIDFromProgID(progId, clsId);
if (FAILED(hr))
{
ShowException(progId, hr, NULL, 0);
wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
return false;
}
IUnknown *pUnk = NULL;
hr = GetActiveObject(clsId, NULL, &pUnk);
if (FAILED(hr))
{
ShowException(progId, hr, NULL, 0);
wxLogWarning(wxT("Cannot find an active object"));
if ( flags & wxAutomationInstance_CreateIfNeeded )
{
const_cast<wxAutomationObject *>(this)->
m_dispatchPtr = DoCreateInstance(progId, clsId);
if ( m_dispatchPtr )
return true;
}
else
{
wxLogSysError(hr,
_("Cannot get an active instance of \"%s\""), progId);
}
return false;
}
hr = pUnk->QueryInterface(IID_IDispatch, (LPVOID*) &m_dispatchPtr);
if (FAILED(hr))
{
ShowException(progId, hr, NULL, 0);
wxLogWarning(wxT("Cannot find IDispatch interface"));
wxLogSysError(hr,
_("Failed to get OLE automation interface for \"%s\""),
progId);
return false;
}
@@ -536,34 +574,15 @@ bool wxAutomationObject::CreateInstance(const wxString& progId) const
if (m_dispatchPtr)
return false;
HRESULT hr;
CLSID clsId;
wxBasicString unicodeName(progId);
hr = CLSIDFromProgID((BSTR) unicodeName, &clsId);
HRESULT hr = wxCLSIDFromProgID(progId, clsId);
if (FAILED(hr))
{
ShowException(progId, hr, NULL, 0);
wxLogWarning(wxT("Cannot obtain CLSID from ProgID"));
return false;
}
// get the server IDispatch interface
//
// NB: using CLSCTX_INPROC_HANDLER results in failure when getting
// Automation interface for Microsoft Office applications so don't use
// CLSCTX_ALL which includes it
hr = CoCreateInstance(clsId, NULL, CLSCTX_SERVER, IID_IDispatch,
(void**)&m_dispatchPtr);
if (FAILED(hr))
{
ShowException(progId, hr, NULL, 0);
wxLogWarning(wxT("Could not start an instance of this class."));
return false;
}
const_cast<wxAutomationObject *>(this)->
m_dispatchPtr = DoCreateInstance(progId, clsId);
return true;
return m_dispatchPtr != NULL;
}
static void
@@ -576,70 +595,68 @@ ShowException(const wxString& member,
switch (GetScode(hr))
{
case DISP_E_UNKNOWNNAME:
message = wxT("Unknown name or named argument.");
message = _("Unknown name or named argument.");
break;
case DISP_E_BADPARAMCOUNT:
message = wxT("Incorrect number of arguments.");
message = _("Incorrect number of arguments.");
break;
case DISP_E_EXCEPTION:
if ( pexcep )
{
message = wxT("Error Code (");
message << pexcep->wCode ;// unsigned short
message += wxT(")");
if (pexcep->bstrDescription != NULL)
message += pexcep->bstrDescription;
else
message += wxT("<<No Description>>");
if ( pexcep->bstrDescription )
message << pexcep->bstrDescription << wxS(" ");
message += wxString::Format(wxS("error code %u"), pexcep->wCode);
}
else
{
message = _("Unknown exception");
}
break;
case DISP_E_MEMBERNOTFOUND:
message = wxT("Method or property not found.");
message = _("Method or property not found.");
break;
case DISP_E_OVERFLOW:
message = wxT("Overflow while coercing argument values.");
message = _("Overflow while coercing argument values.");
break;
case DISP_E_NONAMEDARGS:
message = wxT("Object implementation does not support named arguments.");
message = _("Object implementation does not support named arguments.");
break;
case DISP_E_UNKNOWNLCID:
message = wxT("The locale ID is unknown.");
message = _("The locale ID is unknown.");
break;
case DISP_E_PARAMNOTOPTIONAL:
message = wxT("Missing a required parameter.");
message = _("Missing a required parameter.");
break;
case DISP_E_PARAMNOTFOUND:
message = wxT("Argument not found, argument.");
message << uiArgErr;
message.Printf(_("Argument %u not found."), uiArgErr);
break;
case DISP_E_TYPEMISMATCH:
message = wxT("Type mismatch, argument.");
message << uiArgErr;
message.Printf(_("Type mismatch in argument %u."), uiArgErr);
break;
case ERROR_FILE_NOT_FOUND:
message = wxT("The system cannot find the file specified.");
message = _("The system cannot find the file specified.");
break;
case REGDB_E_CLASSNOTREG:
message = wxT("Class not registered.");
message = _("Class not registered.");
break;
default:
message = wxT("Unknown error occurred. Return value is ");
message << hr;
message.Printf(_("Unknown error %08x"), hr);
break;
}
wxLogDebug("OLE Automation error in %s: %s", member, message);
wxLogError(_("OLE Automation error in %s: %s"), member, message);
}
#endif // wxUSE_OLE_AUTOMATION