381 lines
9.8 KiB
C++
381 lines
9.8 KiB
C++
//------------------------------------------------------------------------------
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// File: CProp.cpp
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//
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// Desc: DirectShow base classes - implements CBasePropertyPage class.
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//
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// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#include <streams.h>
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// Constructor for the base property page class. As described in the header
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// file we must be initialised with dialog and title resource identifiers.
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// The class supports IPropertyPage and overrides AddRef and Release calls
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// to keep track of the reference counts. When the last count is released
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// we call SetPageSite(NULL) and SetObjects(0,NULL) to release interfaces
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// previously obtained by the property page when it had SetObjects called
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CBasePropertyPage::CBasePropertyPage(TCHAR *pName, // Debug only name
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LPUNKNOWN pUnk, // COM Delegator
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int DialogId, // Resource ID
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int TitleId) : // To get tital
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CUnknown(pName,pUnk),
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m_DialogId(DialogId),
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m_TitleId(TitleId),
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m_hwnd(NULL),
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m_Dlg(NULL),
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m_pPageSite(NULL),
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m_bObjectSet(FALSE),
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m_bDirty(FALSE)
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{
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}
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#ifdef UNICODE
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CBasePropertyPage::CBasePropertyPage(CHAR *pName, // Debug only name
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LPUNKNOWN pUnk, // COM Delegator
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int DialogId, // Resource ID
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int TitleId) : // To get tital
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CUnknown(pName,pUnk),
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m_DialogId(DialogId),
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m_TitleId(TitleId),
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m_hwnd(NULL),
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m_Dlg(NULL),
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m_pPageSite(NULL),
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m_bObjectSet(FALSE),
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m_bDirty(FALSE)
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{
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}
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#endif
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// Increment our reference count
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STDMETHODIMP_(ULONG) CBasePropertyPage::NonDelegatingAddRef()
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{
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LONG lRef = InterlockedIncrement(&m_cRef);
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ASSERT(lRef > 0);
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return max(ULONG(m_cRef),1ul);
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}
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// Release a reference count and protect against reentrancy
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STDMETHODIMP_(ULONG) CBasePropertyPage::NonDelegatingRelease()
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{
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// If the reference count drops to zero delete ourselves
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if (InterlockedDecrement(&m_cRef) == 0) {
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m_cRef++;
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SetPageSite(NULL);
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SetObjects(0,NULL);
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delete this;
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return ULONG(0);
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} else {
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return max(ULONG(m_cRef),1ul);
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}
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}
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// Expose our IPropertyPage interface
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STDMETHODIMP
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CBasePropertyPage::NonDelegatingQueryInterface(REFIID riid,void **ppv)
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{
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if (riid == IID_IPropertyPage) {
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return GetInterface((IPropertyPage *)this,ppv);
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} else {
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return CUnknown::NonDelegatingQueryInterface(riid,ppv);
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}
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}
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// Get the page info so that the page site can size itself
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STDMETHODIMP CBasePropertyPage::GetPageInfo(LPPROPPAGEINFO pPageInfo)
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{
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CheckPointer(pPageInfo,E_POINTER);
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WCHAR wszTitle[STR_MAX_LENGTH];
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WideStringFromResource(wszTitle,m_TitleId);
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// Allocate dynamic memory for the property page title
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LPOLESTR pszTitle;
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HRESULT hr = AMGetWideString(wszTitle, &pszTitle);
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if (FAILED(hr)) {
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NOTE("No caption memory");
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return hr;
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}
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pPageInfo->cb = sizeof(PROPPAGEINFO);
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pPageInfo->pszTitle = pszTitle;
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pPageInfo->pszDocString = NULL;
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pPageInfo->pszHelpFile = NULL;
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pPageInfo->dwHelpContext = 0;
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// Set defaults in case GetDialogSize fails
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pPageInfo->size.cx = 340;
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pPageInfo->size.cy = 150;
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GetDialogSize(m_DialogId, DialogProc,0L,&pPageInfo->size);
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return NOERROR;
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}
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// Handles the messages for our property window
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INT_PTR CALLBACK CBasePropertyPage::DialogProc(HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam)
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{
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CBasePropertyPage *pPropertyPage;
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switch (uMsg) {
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case WM_INITDIALOG:
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SetWindowLongPtr(hwnd, DWLP_USER, lParam);
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// This pointer may be NULL when calculating size
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pPropertyPage = (CBasePropertyPage *) lParam;
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if (pPropertyPage == NULL) {
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return (LRESULT) 1;
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}
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pPropertyPage->m_Dlg = hwnd;
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}
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// This pointer may be NULL when calculating size
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pPropertyPage = (CBasePropertyPage *) GetWindowLongPtr(hwnd, DWLP_USER);
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if (pPropertyPage == NULL) {
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return (LRESULT) 1;
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}
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return pPropertyPage->OnReceiveMessage(hwnd,uMsg,wParam,lParam);
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}
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// Tells us the object that should be informed of the property changes
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STDMETHODIMP CBasePropertyPage::SetObjects(ULONG cObjects,LPUNKNOWN *ppUnk)
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{
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if (cObjects == 1) {
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if ((ppUnk == NULL) || (*ppUnk == NULL)) {
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return E_POINTER;
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}
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// Set a flag to say that we have set the Object
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m_bObjectSet = TRUE ;
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return OnConnect(*ppUnk);
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} else if (cObjects == 0) {
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// Set a flag to say that we have not set the Object for the page
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m_bObjectSet = FALSE ;
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return OnDisconnect();
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}
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DbgBreak("No support for more than one object");
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return E_UNEXPECTED;
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}
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// Create the window we will use to edit properties
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STDMETHODIMP CBasePropertyPage::Activate(HWND hwndParent,
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LPCRECT pRect,
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BOOL fModal)
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{
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CheckPointer(pRect,E_POINTER);
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// Return failure if SetObject has not been called.
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if (m_bObjectSet == FALSE) {
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return E_UNEXPECTED;
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}
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if (m_hwnd) {
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return E_UNEXPECTED;
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}
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m_hwnd = CreateDialogParam(g_hInst,
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MAKEINTRESOURCE(m_DialogId),
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hwndParent,
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DialogProc,
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(LPARAM) this);
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if (m_hwnd == NULL) {
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return E_OUTOFMEMORY;
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}
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OnActivate();
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Move(pRect);
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return Show(SW_SHOWNORMAL);
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}
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// Set the position of the property page
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STDMETHODIMP CBasePropertyPage::Move(LPCRECT pRect)
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{
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CheckPointer(pRect,E_POINTER);
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if (m_hwnd == NULL) {
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return E_UNEXPECTED;
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}
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MoveWindow(m_hwnd, // Property page handle
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pRect->left, // x coordinate
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pRect->top, // y coordinate
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WIDTH(pRect), // Overall window width
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HEIGHT(pRect), // And likewise height
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TRUE); // Should we repaint it
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return NOERROR;
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}
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// Display the property dialog
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STDMETHODIMP CBasePropertyPage::Show(UINT nCmdShow)
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{
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// Have we been activated yet
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if (m_hwnd == NULL) {
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return E_UNEXPECTED;
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}
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// Ignore wrong show flags
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if ((nCmdShow != SW_SHOW) && (nCmdShow != SW_SHOWNORMAL) && (nCmdShow != SW_HIDE)) {
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return E_INVALIDARG;
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}
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ShowWindow(m_hwnd,nCmdShow);
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InvalidateRect(m_hwnd,NULL,TRUE);
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return NOERROR;
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}
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// Destroy the property page dialog
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STDMETHODIMP CBasePropertyPage::Deactivate(void)
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{
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if (m_hwnd == NULL) {
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return E_UNEXPECTED;
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}
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// Remove WS_EX_CONTROLPARENT before DestroyWindow call
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DWORD dwStyle = GetWindowLong(m_hwnd, GWL_EXSTYLE);
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dwStyle = dwStyle & (~WS_EX_CONTROLPARENT);
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// Set m_hwnd to be NULL temporarily so the message handler
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// for WM_STYLECHANGING doesn't add the WS_EX_CONTROLPARENT
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// style back in
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HWND hwnd = m_hwnd;
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m_hwnd = NULL;
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SetWindowLong(hwnd, GWL_EXSTYLE, dwStyle);
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m_hwnd = hwnd;
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OnDeactivate();
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// Destroy the dialog window
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DestroyWindow(m_hwnd);
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m_hwnd = NULL;
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return NOERROR;
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}
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// Tells the application property page site
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STDMETHODIMP CBasePropertyPage::SetPageSite(LPPROPERTYPAGESITE pPageSite)
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{
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if (pPageSite) {
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if (m_pPageSite) {
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return E_UNEXPECTED;
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}
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m_pPageSite = pPageSite;
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m_pPageSite->AddRef();
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} else {
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if (m_pPageSite == NULL) {
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return E_UNEXPECTED;
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}
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m_pPageSite->Release();
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m_pPageSite = NULL;
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}
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return NOERROR;
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}
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// Apply any changes so far made
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STDMETHODIMP CBasePropertyPage::Apply()
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{
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// In ActiveMovie 1.0 we used to check whether we had been activated or
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// not. This is too constrictive. Apply should be allowed as long as
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// SetObject was called to set an object. So we will no longer check to
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// see if we have been activated (ie., m_hWnd != NULL), but instead
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// make sure that m_bObjectSet is TRUE (ie., SetObject has been called).
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if (m_bObjectSet == FALSE) {
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return E_UNEXPECTED;
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}
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// Must have had a site set
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if (m_pPageSite == NULL) {
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return E_UNEXPECTED;
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}
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// Has anything changed
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if (m_bDirty == FALSE) {
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return NOERROR;
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}
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// Commit derived class changes
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HRESULT hr = OnApplyChanges();
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if (SUCCEEDED(hr)) {
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m_bDirty = FALSE;
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}
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return hr;
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}
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// Base class definition for message handling
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INT_PTR CBasePropertyPage::OnReceiveMessage(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
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{
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// we would like the TAB key to move around the tab stops in our property
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// page, but for some reason OleCreatePropertyFrame clears the CONTROLPARENT
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// style behind our back, so we need to switch it back on now behind its
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// back. Otherwise the tab key will be useless in every page.
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//
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CBasePropertyPage *pPropertyPage;
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{
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pPropertyPage = (CBasePropertyPage *) GetWindowLongPtr(hwnd, DWLP_USER);
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if (pPropertyPage->m_hwnd == NULL) {
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return 0;
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}
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switch (uMsg) {
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case WM_STYLECHANGING:
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if (wParam == GWL_EXSTYLE) {
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LPSTYLESTRUCT lpss = (LPSTYLESTRUCT)lParam;
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lpss->styleNew |= WS_EX_CONTROLPARENT;
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return 0;
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}
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}
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}
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return DefWindowProc(hwnd,uMsg,wParam,lParam);
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}
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