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132 lines
4.3 KiB
132 lines
4.3 KiB
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// WiaDataCallback.cpp: implementation of the CWiaEventCallback class.
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//
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//////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "wiatest.h"
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#include "WiaEventCallback.h"
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#ifdef _DEBUG
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#undef THIS_FILE
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static char THIS_FILE[]=__FILE__;
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#define new DEBUG_NEW
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#endif
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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CWiaEventCallback::CWiaEventCallback()
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{
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m_cRef = 0;
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for(LONG lEventIndex = 0; lEventIndex < MAX_REGISTERED_EVENTS; lEventIndex++){
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if(m_pIUnkRelease[lEventIndex]){
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m_pIUnkRelease[lEventIndex] = NULL;
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}
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}
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memset(m_szWindowText,0,sizeof(m_szWindowText));
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}
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CWiaEventCallback::~CWiaEventCallback()
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{
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for(LONG lEventIndex = 0; lEventIndex < MAX_REGISTERED_EVENTS; lEventIndex++){
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if(m_pIUnkRelease[lEventIndex]){
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m_pIUnkRelease[lEventIndex]->Release();
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m_pIUnkRelease[lEventIndex] = NULL;
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}
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}
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}
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HRESULT _stdcall CWiaEventCallback::QueryInterface(const IID& iid, void** ppv)
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{
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*ppv = NULL;
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if (iid == IID_IUnknown || iid == IID_IWiaEventCallback)
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*ppv = (IWiaEventCallback*) this;
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else
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return E_NOINTERFACE;
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AddRef();
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return S_OK;
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}
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ULONG _stdcall CWiaEventCallback::AddRef()
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{
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InterlockedIncrement((long*) &m_cRef);
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return m_cRef;
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}
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ULONG _stdcall CWiaEventCallback::Release()
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{
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ULONG ulRefCount = m_cRef - 1;
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if (InterlockedDecrement((long*) &m_cRef) == 0)
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{
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delete this;
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return 0;
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}
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return ulRefCount;
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}
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HRESULT _stdcall CWiaEventCallback::ImageEventCallback(
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const GUID *pEventGUID,
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BSTR bstrEventDescription,
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BSTR bstrDeviceID,
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BSTR bstrDeviceDescription,
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DWORD dwDeviceType,
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BSTR bstrFullItemName,
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ULONG *plEventType,
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ULONG ulReserved)
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{
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TCHAR szStatusText[255];
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memset(szStatusText,0,sizeof(szStatusText));
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TSPRINTF(szStatusText,TEXT("Description: %ws\nDeviceID: %ws\nDevice Description: %ws\nDevice Type: %d\nFull Item Name: %ws"),
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bstrEventDescription,
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bstrDeviceID,
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bstrDeviceDescription,
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dwDeviceType,
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bstrFullItemName);
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if(lstrlen(m_szWindowText) == 0){
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SetViewWindowHandle(m_hViewWindow);
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}
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::MessageBox(m_hViewWindow,szStatusText, m_szWindowText, MB_ICONINFORMATION);
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if (NULL != m_hViewWindow) {
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BSTR bstrTargetDevice = SysAllocString(bstrDeviceID);
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// handle known events
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if (*pEventGUID == WIA_EVENT_DEVICE_DISCONNECTED) {
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::PostMessage(m_hViewWindow,WM_DEVICE_DISCONNECTED,0,(LPARAM)bstrTargetDevice);
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} else if (*pEventGUID == WIA_EVENT_DEVICE_CONNECTED) {
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::PostMessage(m_hViewWindow,WM_DEVICE_CONNECTED,0,0);
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} else if (*pEventGUID == WIA_EVENT_ITEM_DELETED) {
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::PostMessage(m_hViewWindow,WM_ITEM_DELETED,0,0);
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} else if (*pEventGUID == WIA_EVENT_ITEM_CREATED) {
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::PostMessage(m_hViewWindow,WM_ITEM_CREATED,0,0);
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} else if (*pEventGUID == WIA_EVENT_TREE_UPDATED) {
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::PostMessage(m_hViewWindow,WM_TREE_UPDATED,0,0);
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} else if (*pEventGUID == WIA_EVENT_STORAGE_CREATED) {
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::PostMessage(m_hViewWindow,WM_STORAGE_CREATED,0,0);
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} else if (*pEventGUID == WIA_EVENT_STORAGE_DELETED) {
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::PostMessage(m_hViewWindow,WM_STORAGE_DELETED,0,0);
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}
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}
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return S_OK;
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}
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void CWiaEventCallback::SetViewWindowHandle(HWND hWnd)
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{
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m_hViewWindow = hWnd;
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TCHAR szWindowText[MAX_PATH];
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memset(szWindowText,0,sizeof(szWindowText));
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GetWindowText(hWnd,szWindowText,(sizeof(szWindowText)/sizeof(TCHAR)));
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TSPRINTF(m_szWindowText,TEXT("Event Notification [%s]"),szWindowText);
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}
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void CWiaEventCallback::SetNumberOfEventsRegistered(LONG lEventsRegistered)
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{
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m_lNumEventsRegistered = lEventsRegistered;
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}
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