168 lines
3.8 KiB
C++
168 lines
3.8 KiB
C++
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//=======================================================================
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//
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// Copyright (c) 2001 Microsoft Corporation. All Rights Reserved.
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//
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// File: customlbacc.cpp
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//
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// Creator: weiw
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//
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// Purpose: custom list box accessibility file
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//
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//=======================================================================
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#include <pch.h>
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#pragma hdrstop
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BSTR GetMYLBItemTitle(DWORD idChild)
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{
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//DEBUGMSG("GetMYLBItemTitle() called");
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static LPCTSTR tszDefItemTitle = _T("");
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LRESULT lr = SendMessage(ghWndList, LB_GETITEMDATA, idChild, 0);
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if (LB_ERR == lr)
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{
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return SysAllocString(tszDefItemTitle);
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}
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LBITEM *pItem = (LBITEM*) lr;
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return SysAllocString(pItem->szTitle);
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}
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BSTR GetMYLBItemDesc(DWORD idChild)
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{
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//DEBUGMSG("GetMYLBItemDesc() called");
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static LPCTSTR tszDefItemDesc = _T("");
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_bstr_t bstrItemDesc;
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BSTR bsRet = NULL;
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LRESULT lr = SendMessage(ghWndList, LB_GETITEMDATA, idChild, 0);
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try
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{
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if (LB_ERR == lr)
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{
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bstrItemDesc = _bstr_t(tszDefItemDesc);
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}
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else
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{
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LBITEM *pItem = (LBITEM*) lr;
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bstrItemDesc = _bstr_t(pItem->pszDescription);
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if (pItem->bRTF)
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{
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DEBUGMSG("GetMYLBItemDesc() Item got RTF, adding %S", gtszRTFShortcut);
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bstrItemDesc += _bstr_t(gtszRTFShortcut);
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}
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}
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bsRet = bstrItemDesc.copy();
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}
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catch (...)
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{
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DEBUGMSG("GetMYLBItemDesc() got _bstr_t exception");
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}
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return bsRet;
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}
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DWORD GetMYLBItemState(DWORD idChild)
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{
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//DEBUGMSG("GetMYLBItemState() called");
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DWORD dwState = STATE_SYSTEM_FOCUSABLE|STATE_SYSTEM_SELECTABLE;
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LRESULT lr = SendMessage(ghWndList, LB_GETITEMDATA, idChild, 0);
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if (LB_ERR == lr)
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{
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goto done;
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}
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LBITEM *pItem = (LBITEM*) lr;
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if (pItem->bSelect)
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{
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dwState |= STATE_SYSTEM_CHECKED;
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}
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if (idChild == gFocusItemId)
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{
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dwState |= STATE_SYSTEM_FOCUSED|STATE_SYSTEM_SELECTED;
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}
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done:
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return dwState;
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}
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HRESULT STDMETHODCALLTYPE MYLBAccPropServer::GetPropValue (
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const BYTE * pIDString,
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DWORD dwIDStringLen,
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MSAAPROPID idProp,
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VARIANT * pvarValue,
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BOOL * pfGotProp )
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{
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HRESULT hr = S_OK;
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BOOL fHoldMYLB = FALSE;
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//DEBUGMSG("MYLBAccPropServer::GetPropValue() starts");
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if (NULL == pvarValue || NULL == pfGotProp)
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{
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hr = E_INVALIDARG;
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goto done;
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}
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pvarValue->vt = VT_EMPTY;
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*pfGotProp = FALSE;
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if (!(fHoldMYLB = TryEnterCriticalSection(&gcsClient))||
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! IsWindow( ghWndList ) ||
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GetProp( ghWndList, MYLBALIVEPROP) != (HANDLE)TRUE )
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{
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DEBUGMSG("GetPropValue() MYLB is not alive any more");
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hr = RPC_E_DISCONNECTED;
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goto done;
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}
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HWND hwnd;
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DWORD idObject;
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DWORD idChild;
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if( S_OK != m_pAccPropSvc->DecomposeHwndIdentityString( pIDString, dwIDStringLen,
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& hwnd, & idObject, & idChild ) )
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{
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// problem decomposing identity string - return early...
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goto done;
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}
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if( idChild != CHILDID_SELF )
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{
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DEBUGMSG("MYLBAccPropServer::GetPropValue() for child Id %lu", idChild);
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if (PROPID_ACC_NAME == idProp)
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{
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pvarValue->bstrVal = GetMYLBItemTitle(idChild-1);
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if (NULL == pvarValue->bstrVal)
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{
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goto done;
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}
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pvarValue->vt = VT_BSTR;
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*pfGotProp = TRUE;
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}
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else if (PROPID_ACC_STATE == idProp)
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{
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pvarValue->vt = VT_I4;
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pvarValue->lVal = GetMYLBItemState(idChild-1);
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*pfGotProp = TRUE;
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}
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else if (PROPID_ACC_ROLE == idProp)
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{
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pvarValue->vt = VT_I4;
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pvarValue->lVal = ROLE_SYSTEM_CHECKBUTTON;
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*pfGotProp = TRUE;
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}
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else if (PROPID_ACC_DESCRIPTION == idProp)
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{
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pvarValue->bstrVal = GetMYLBItemDesc(idChild-1);
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if (NULL == pvarValue->bstrVal)
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{
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goto done;
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}
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pvarValue->vt = VT_BSTR;
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*pfGotProp = TRUE;
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}
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}
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done:
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if (fHoldMYLB)
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{
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LeaveCriticalSection(&gcsClient);
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}
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//DEBUGMSG("MYLBAccPropServer::GetPropValue() ends");
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return hr;
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}
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