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- /*
- * LINKUSER.CPP
- * Link User Chapter 9
- *
- * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
- *
- * Kraig Brockschmidt, Microsoft
- * Internet : kraigb@microsoft.com
- * Compuserve: >INTERNET:kraigb@microsoft.com
- */
-
-
- #define INITGUIDS
- #include "linkuser.h"
-
-
- /*
- * WinMain
- *
- * Purpose:
- * Main entry point of application.
- */
-
- int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hInstPrev
- , LPSTR pszCmdLine, int nCmdShow)
- {
- MSG msg;
- PAPP pApp;
-
- SETMESSAGEQUEUE(96);
-
- pApp=new CApp(hInst, hInstPrev, nCmdShow);
-
- if (NULL==pApp)
- return -1;
-
- if (pApp->Init())
- {
- while (GetMessage(&msg, NULL, 0,0 ))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
-
- delete pApp;
- return msg.wParam;
- }
-
-
-
-
-
- /*
- * DataUserWndProc
- *
- * Purpose:
- * Window class procedure. Standard callback.
- */
-
- LRESULT APIENTRY LinkUserWndProc(HWND hWnd, UINT iMsg
- , WPARAM wParam, LPARAM lParam)
- {
- PAPP pApp;
- RECT rc;
-
- COMMANDPARAMS(wID, wCode, hWndMsg);
-
- pApp=(PAPP)GetWindowLong(hWnd, LINKUSERWL_STRUCTURE);
-
- switch (iMsg)
- {
- case WM_NCCREATE:
- pApp=(PAPP)((LPCREATESTRUCT)lParam)->lpCreateParams;
- SetWindowLong(hWnd, LINKUSERWL_STRUCTURE, (LONG)pApp);
- return (DefWindowProc(hWnd, iMsg, wParam, lParam));
-
- case WM_DESTROY:
- PostQuitMessage(0);
- break;
-
- case WM_SIZE:
- //Keep the listbox filling the client area
- GetClientRect(hWnd, &rc);
- SetWindowPos(pApp->m_hWndList, NULL, rc.left, rc.top
- , rc.right-rc.left, rc.bottom-rc.top
- , SWP_NOZORDER | SWP_NOACTIVATE);
- break;
-
- case WM_COMMAND:
- wID=LOWORD(wParam);
-
- switch (wID)
- {
- case ID_LISTOLINKS:
- switch (wCode)
- {
- case LBN_DBLCLK:
- pApp->ShowDescription();
- break;
- }
-
- break;
-
- case IDM_LINKSHOWDESCRIPTION:
- //Same as double-clicking in listbox
- pApp->ShowDescription();
- break;
-
- case IDM_LINKPARSEANDBIND:
- pApp->ParseAndBind();
- break;
-
- case IDM_LINKEXIT:
- PostMessage(hWnd, WM_CLOSE, 0, 0L);
- break;
-
- default:
- break;
- }
- break;
-
- default:
- return (DefWindowProc(hWnd, iMsg, wParam, lParam));
- }
-
- return 0L;
- }
-
-
-
-
-
- /*
- * CApp::CApp
- * CApp::~CApp
- *
- * Constructor Parameters: (from WinMain)
- * hInst HINSTANCE of the application.
- * hInstPrev HINSTANCE of a previous instance.
- * nCmdShow UINT specifying how to show the app window.
- */
-
- CApp::CApp(HINSTANCE hInst, HINSTANCE hInstPrev
- , UINT nCmdShow)
- {
- UINT i;
-
- m_hInst=hInst;
- m_hInstPrev=hInstPrev;
- m_nCmdShow=nCmdShow;
-
- m_hWnd=NULL;
- m_fInitialized=FALSE;
- m_hWndList=NULL;
-
- for (i=0; i < CMONIKERS; i++)
- m_rgpmk[i]=NULL;
-
- return;
- }
-
-
- CApp::~CApp(void)
- {
- UINT i;
-
- for (i=0; i < CMONIKERS; i++)
- ReleaseInterface(m_rgpmk[i]);
-
- if (IsWindow(m_hWnd))
- DestroyWindow(m_hWnd); //Destroys listbox
-
- if (m_fInitialized)
- CoUninitialize();
-
- return;
- }
-
-
-
-
- /*
- * CApp::Init
- *
- * Purpose:
- * Initializes an CApp object by registering window classes,
- * creating the main window, and doing anything else prone to
- * failure such as calling CoInitialize. If this function fails
- * the caller should insure that the destructor is called.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
-
- BOOL CApp::Init(void)
- {
- WNDCLASS wc;
- BOOL fRet;
- RECT rc;
-
- CHECKVER_COM;
-
- if (FAILED(CoInitialize(NULL)))
- return FALSE;
-
- m_fInitialized=TRUE;
-
- //Register our window classes.
- if (!m_hInstPrev)
- {
- wc.style = CS_HREDRAW | CS_VREDRAW;
- wc.lpfnWndProc = LinkUserWndProc;
- wc.cbClsExtra = 0;
- wc.cbWndExtra = CBWNDEXTRA;
- wc.hInstance = m_hInst;
- wc.hIcon = LoadIcon(m_hInst, TEXT("Icon"));
- wc.hCursor = LoadCursor(NULL, IDC_ARROW);
- wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
- wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU);
- wc.lpszClassName = TEXT("LINKUSER");
-
- if (!RegisterClass(&wc))
- return FALSE;
- }
-
- //Create the main window.
- m_hWnd=CreateWindow(TEXT("LINKUSER"), TEXT("Link User")
- , WS_OVERLAPPEDWINDOW,35, 35, 420, 250, NULL
- , NULL, m_hInst, this);
-
- if (NULL==m_hWnd)
- return FALSE;
-
- //Create the list of monikers
- GetClientRect(m_hWnd, &rc);
- m_hWndList=CreateWindow(TEXT("listbox"), TEXT("LinkList")
- , WS_CHILD | WS_VISIBLE | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT
- , rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top
- , m_hWnd, (HMENU)ID_LISTOLINKS, m_hInst, NULL);
-
- if (NULL==m_hWndList)
- return FALSE;
-
- if (!CreateMonikers())
- return FALSE;
-
- if (!ListInitialize())
- return FALSE;
-
- ShowWindow(m_hWnd, m_nCmdShow);
- UpdateWindow(m_hWnd);
-
- return fRet;
- }
-
-
-
- /*
- * CApp::CreateMonikers
- *
- * Purpose:
- * Creates monikers and stores them in m_rgpmk.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
-
- BOOL CApp::CreateMonikers(void)
- {
- TCHAR szFile[]=TEXT("c:\\inole\\chap09\\linksrc\\goop.lks");
- TCHAR szItem1[]=TEXT("Object 2");
- TCHAR szItem2[]=TEXT("Sub-Object 3");
- TCHAR szDelim[]=TEXT("!");
- IMoniker *pmkItem;
- HRESULT hr;
-
- //Create a simple file moniker
- if (FAILED(CreateFileMoniker(szFile, &m_rgpmk[0])))
- return FALSE;
-
- //Create File!Item moniker, item first, then composite
- if (FAILED(CreateItemMoniker(szDelim, szItem1, &pmkItem)))
- return FALSE;
-
- //The output here will be the File!Item moniker
- hr=m_rgpmk[0]->ComposeWith(pmkItem, FALSE, &m_rgpmk[1]);
- pmkItem->Release();
-
- if (FAILED(hr))
- return FALSE;
-
- /*
- * Now create the File!Item!Item by appending another item
- * onto the File!Item just created.
- */
- if (FAILED(CreateItemMoniker(szDelim, szItem2, &pmkItem)))
- return FALSE;
-
- hr=m_rgpmk[1]->ComposeWith(pmkItem, FALSE, &m_rgpmk[2]);
- pmkItem->Release();
-
- if (FAILED(hr))
- return FALSE;
-
- return TRUE;
- }
-
-
-
-
- /*
- * CApp::ListInitialize
- *
- * Purpose:
- * Retrieves the display names for each moniker in our
- * array and displays that name in the listbox.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
-
- BOOL CApp::ListInitialize(void)
- {
- UINT i;
-
- for (i=0; i < CMONIKERS; i++)
- {
- LPOLESTR pszName;
- HRESULT hr;
- IBindCtx *pbc;
-
- if (FAILED(CreateBindCtx(0, &pbc)))
- return FALSE;
-
- hr=m_rgpmk[i]->GetDisplayName(pbc, NULL, &pszName);
- pbc->Release();
-
- if (FAILED(hr))
- return FALSE;
-
- #ifdef WIN32ANSI
- char szTemp[256];
-
- WideCharToMultiByte(CP_ACP, 0, pszName, -1, szTemp, 256
- , NULL, NULL);
- SendMessage(m_hWndList, LB_ADDSTRING, 0, (LPARAM)szTemp);
- #else
- SendMessage(m_hWndList, LB_ADDSTRING, 0, (LPARAM)pszName);
- #endif
- }
-
- return TRUE;
- }
-
-
-
-
- /*
- * CApp::ShowDescription
- *
- * Purpose:
- * Tells CApp to retrieve the description text for a particular
- * item in its listbox. This is done in response to a double-click
- * on a moniker display name which we bind to an ask for
- * IDescription.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * None
- */
-
- void CApp::ShowDescription(void)
- {
- int i;
-
- i=(int)SendMessage(m_hWndList, LB_GETCURSEL, 0, 0L);
-
- if (LB_ERR==i)
- return;
-
- BindAndShow(m_rgpmk[i], NULL);
- return;
- }
-
-
-
-
- /*
- * CApp::ParseAndBind
- *
- * Purpose:
- * Recreates a moniker from the display name under the current
- * selection then attempts to bind as with ShowDescription.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * None
- */
-
- void CApp::ParseAndBind(void)
- {
- HRESULT hr;
- IBindCtx *pbc;
- IMoniker *pmk;
- int i;
- TCHAR szName[512];
- ULONG chEaten=0;
-
- i=(int)SendMessage(m_hWndList, LB_GETCURSEL, 0, 0L);
-
- if (LB_ERR==i)
- return;
-
- SendMessage(m_hWndList, LB_GETTEXT, i, (LPARAM)(LPTSTR)szName);
-
- if (FAILED(CreateBindCtx(0, &pbc)))
- {
- MessageBox(m_hWnd, TEXT("Failed to create bind context")
- , TEXT("Link User"), MB_OK);
- return;
- }
-
-
- hr=MkParseDisplayName(pbc, szName, &chEaten, &pmk);
-
- if (SUCCEEDED(hr))
- {
- MessageBox(m_hWnd, TEXT("Name parsed. Press OK to bind...")
- , TEXT("Link User"), MB_OK);
-
- BindAndShow(pmk, pbc);
- pmk->Release();
- }
- else
- {
- //Tell the user how far parsing got
- wsprintf(szName, TEXT("Parsing failed after %lu characters")
- , chEaten);
-
- MessageBox(m_hWnd, szName, TEXT("Link User"), MB_OK);
- }
-
- pbc->Release();
- return;
- }
-
-
-
-
- /*
- * CApp::BindAndShow
- *
- * Purpose:
- * Binds to a given moniker to given moniker and requests
- * IDescription, asking that object for display text.
- *
- * Parameters:
- * pmk IMoniker * naming the object.
- * pbc IBindCtx * to use. If NULL, this will use
- * a default.
- *
- * Return Value:
- * None
- */
-
- void CApp::BindAndShow(IMoniker *pmk, IBindCtx *pbc)
- {
- HRESULT hr;
- IDescription *pIDescription;
-
- if (NULL==pbc)
- {
- hr=BindMoniker(pmk, 0, IID_IDescription
- , (void **)&pIDescription);
- }
- else
- {
- hr=pmk->BindToObject(pbc, NULL, IID_IDescription
- , (void **)&pIDescription);
- }
-
- if (SUCCEEDED(hr))
- {
- const ULONG cch=512;
- TCHAR szText[cch];
-
- #ifdef WIN32ANSI
- WCHAR szw[cch];
- hr=pIDescription->GetText(szw, cch);
- WideCharToMultiByte(CP_ACP, 0, szw, -1, szText, cch, NULL, NULL);
- #else
- hr=pIDescription->GetText(szText, cch);
- #endif
- pIDescription->Release();
-
- if (SUCCEEDED(hr))
- {
- MessageBox(m_hWnd, szText, TEXT("Description Is:")
- , MB_OK);
- }
- else
- {
- MessageBox(m_hWnd, TEXT("Failed to get description text")
- , TEXT("Link User"), MB_OK);
- }
- }
- else
- {
- MessageBox(m_hWnd, TEXT("BindMoniker failed")
- , TEXT("Link User"), MB_OK);
- }
-
- return;
- }
-