Teledyne-lecroy FireInspector Automation Application Programming I Manual de usuario descargar pdf (Pagina 70)

FireInspector Automation User’s Manual

CATC Version 1.0

2.7.1 IAnalyzerEvents dispinterface

In order to retrieve the events from FireInspector application you must implement

_IAnalyzerEvents

interface.

Since this interface is default source interface for

FwAnalyzer object there is very simple

implementation from languages such as Visual Basic, VBA, VBScript, WSH etc.

C++ implementation used in the examples below utilizes a sink object by deriving from

IDispEventImpl

but not specifying the type library as a template argument. Instead,

the type library and default source interface for the object are determined using

AtlGe-

tObjectSourceInterface(). A

SINK_ENTRY() macro is used for each event

from each source interface which is to be handled:

class CAnalyzerSink : public IDispEventImpl<IDC_SRCOBJ,

CAnalyzerSink>

{

BEGIN_SINK_MAP(CAnalyzerSink)

//Make sure the Event Handlers have __stdcall calling

convention

SINK_ENTRY(IDC_SRCOBJ, 1, OnTraceCreated)

SINK_ENTRY(IDC_SRCOBJ, 2, OnStatusReport)

END_SINK_MAP()

. . .

}

Then, after you established the connection with server you need to advise your implemen-

tation of the event interface:

hr = CoCreateInstance( CLSID_FwAnalyzer, NULL,

CLSCTX_SERVER, IID_IFwAnalyzer, (LPVOID *)&m_poFwAnalyzer

);

m_poAnalyzerSink = new CAnalyzerSink();

// Make sure the COM object corresponding to pUnk implements

// IProvideClassInfo2 or IPersist*. Call this method to

extract info about

// source type library if you specified only 2 parameters to

IDispEventImpl

hr =

AtlGetObjectSourceInterface(m_poFwAnalyzer,&m_poAnalyzerSink

->m_libid,

&m_poAnalyzerSink->m_iid,

&m_poAnalyzerSink->m_wMajorVerNum,

&m_poAnalyzerSink->m_wMinorVerNum);

if ( FAILED(hr) )

return 1;

// connect the sink and source, m_poFwAnalyzer is the source

COM object

hr = m_poAnalyzerSink->DispEventAdvise(m_poFwAnalyzer,

&m_poAnalyzerSink->m_iid);

if ( FAILED(hr) )

return 1;

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