SINK.CPP
资源名称:MSDN_VC98.zip [点击查看]
上传用户:bangxh
上传日期:2007-01-31
资源大小:42235k
文件大小:18k
源码类别:
Windows编程
开发平台:
Visual C++
- /*+==========================================================================
- File: SINK.CPP
- Summary: Implementation file for the COPaperSink COM Object Class.
- Connectable object notifications are handled by COPaperSink.
- COPaperSink offers a main IUnknown interface and the custom
- IPaperSink interface (with the drawing Paper related event
- features). This multiple interface COM Object Class is
- achieved via the technique of nested classes. The
- implementation of the IPaperSink interface is nested inside
- the COPaperSink Class.
- For a comprehensive tutorial code tour of this module's
- contents and offerings see the tutorial DCOMDRAW.HTM
- file. For more specific technical details on the internal
- workings see the comments dispersed throughout the module's
- source code.
- Classes: COPaperSink.
- Functions: none.
- Origin: 8-23-97: atrent - Editor-inheritance from BALL.CPP in
- the CONSERVE Tutorial Code Sample. [Revised]
- ----------------------------------------------------------------------------
- This file is part of the Microsoft COM Tutorial Code Samples.
- Copyright (C) Microsoft Corporation, 1997. All rights reserved.
- This source code is intended only as a supplement to Microsoft
- Development Tools and/or on-line documentation. See these other
- materials for detailed information regarding Microsoft code samples.
- THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
- KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
- PARTICULAR PURPOSE.
- ==========================================================================+*/
- /*---------------------------------------------------------------------------
- We include WINDOWS.H for all Win32 applications.
- We include OLE2.H because we will be calling the COM/OLE Libraries.
- We include OLECTL.H because it has definitions for connectable objects.
- We include APPUTIL.H because we will be building this application using
- the convenient Virtual Window and Dialog classes and other
- utility functions in the APPUTIL Library (ie, APPUTIL.LIB).
- We include PAPINT.H and PAPGUIDS.H for the common paper-related
- Interface class, GUID, and CLSID specifications.
- We include GUIPAPER.H because it declares the class for the main C++
- object that can service the Sink events.
- We include SINK.H because it has the class COPaperSink declarations.
- ---------------------------------------------------------------------------*/
- #include <windows.h>
- #include <ole2.h>
- #include <olectl.h>
- #include <apputil.h>
- #include <papint.h>
- #include <papguids.h>
- #include "guipaper.h"
- #include "sink.h"
- /*---------------------------------------------------------------------------
- COPaperSink's implementation of its main COM object class including
- Constructor, Destructor, QueryInterface, AddRef, and Release.
- ---------------------------------------------------------------------------*/
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::COPaperSink
- Summary: COPaperSink Constructor. Note the member initializer:
- "m_ImpIPaperSink(this, pUnkOuter)" which is used to pass the
- 'this' and pUnkOuter pointers of this constructor function to
- the constructor in the instantiation of the implementation of
- the CImpIPaperSink interface (which is nested inside this
- present COPaperSink Object Class).
- Args: IUnknown* pUnkOuter,
- Pointer to the the outer Unknown. NULL means this COM Object
- is not being Aggregated. Non NULL means it is being created
- on behalf of an outside COM object that is reusing it via
- aggregation.
- CGuiPaper* pGuiPaper)
- Pointer to the main C++ object that can service the PaperSink
- events.
- Modifies: m_cRefs, m_pUnkOuter, m_pGuiPaper.
- Returns: void
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- COPaperSink::COPaperSink(
- IUnknown* pUnkOuter,
- CGuiPaper* pGuiPaper) :
- m_ImpIPaperSink(this, pUnkOuter)
- {
- // Zero the COM object's reference count.
- m_cRefs = 0;
- // No AddRef necessary if non-NULL, as we're nested.
- m_pUnkOuter = pUnkOuter;
- // Assign the pointer to the Sink service C++ object.
- m_pGuiPaper = pGuiPaper;
- return;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::~COPaperSink
- Summary: COPaperSink Destructor.
- Args: void
- Returns: void
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- COPaperSink::~COPaperSink(void)
- {
- return;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::QueryInterface
- Summary: QueryInterface of the COPaperSink non-delegating
- IUnknown implementation.
- Args: REFIID riid,
- [in] GUID of the Interface being requested.
- PPVOID ppv)
- [out] Address of the caller's pointer variable that will
- receive the requested interface pointer.
- Returns: HRESULT
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::QueryInterface(
- REFIID riid,
- PPVOID ppv)
- {
- HRESULT hr = E_NOINTERFACE;
- *ppv = NULL;
- if (IID_IUnknown == riid)
- *ppv = this;
- else if (IID_IPaperSink == riid)
- *ppv = &m_ImpIPaperSink;
- if (NULL != *ppv)
- {
- // We've handed out a pointer to the interface so obey the COM rules
- // and AddRef the reference count.
- ((LPUNKNOWN)*ppv)->AddRef();
- hr = NOERROR;
- }
- return (hr);
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::AddRef
- Summary: AddRef of the COPaperSink non-delegating IUnknown
- implementation.
- Args: void
- Modifies: m_cRefs.
- Returns: ULONG
- New value of m_cRefs (COM object's reference count).
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP_(ULONG) COPaperSink::AddRef(void)
- {
- ULONG cRefs;
- cRefs = ++m_cRefs;
- return cRefs;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::Release
- Summary: Release of the COPaperSink non-delegating IUnknown
- implementation.
- Args: void
- Modifies: m_cRefs.
- Returns: ULONG
- New value of m_cRefs (COM object's reference count).
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP_(ULONG) COPaperSink::Release(void)
- {
- ULONG cRefs;
- cRefs = --m_cRefs;
- if (0 == cRefs)
- {
- // We artificially bump the main ref count to prevent reentrancy
- // via the main object destructor. Not really needed in this
- // COPaperSink but a good practice because we are aggregatable and
- // may at some point in the future add something entertaining like
- // some Releases to the COPaperSink destructor.
- m_cRefs++;
- delete this;
- }
- return cRefs;
- }
- /*---------------------------------------------------------------------------
- COPaperSink's nested implementation of the IPaperSink interface
- including Constructor, Destructor, QueryInterface, AddRef, Release,
- Locked, Unlocked, Loaded, Saved, InkStart, InkDraw, InkStop, Erased,
- and Resized. Methods in this interface are called by COM objects on
- the server side to send notifications to the client.
- ---------------------------------------------------------------------------*/
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::CImpIPaperSink
- Summary: Constructor for the CImpIPaperSink interface instantiation.
- Args: COPaperSink* pCO,
- Back pointer to the parent outer object.
- IUnknown* pUnkOuter
- Pointer to the outer Unknown. For delegation.
- Modifies: m_pCO, m_pUnkOuter.
- Returns: void
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- COPaperSink::CImpIPaperSink::CImpIPaperSink(
- COPaperSink* pCO,
- IUnknown* pUnkOuter)
- {
- // Init the Back Object Pointer to point to the parent object.
- m_pCO = pCO;
- // Init the CImpIPaperSink interface's delegating Unknown pointer. We
- // use the Back Object pointer for IUnknown delegation here if we are
- // not being aggregated. If we are being aggregated we use the supplied
- // pUnkOuter for IUnknown delegation. In either case the pointer
- // assignment requires no AddRef because the CImpIPaperSink lifetime is
- // quaranteed by the lifetime of the parent object in which
- // CImpIPaperSink is nested.
- if (NULL == pUnkOuter)
- m_pUnkOuter = pCO;
- else
- m_pUnkOuter = pUnkOuter;
- return;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::~CImpIPaperSink
- Summary: Destructor for the CImpIPaperSink interface instantiation.
- Args: void
- Returns: void
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- COPaperSink::CImpIPaperSink::~CImpIPaperSink(void)
- {
- return;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::QueryInterface
- Summary: The QueryInterface IUnknown member of this IPaperSink interface
- implementation that delegates to m_pUnkOuter, whatever it is.
- Args: REFIID riid,
- [in] GUID of the Interface being requested.
- PPVOID ppv)
- [out] Address of the caller's pointer variable that will
- receive the requested interface pointer.
- Returns: HRESULT
- Returned by the delegated outer QueryInterface call.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::QueryInterface(
- REFIID riid,
- PPVOID ppv)
- {
- // Delegate this call to the outer object's QueryInterface.
- return m_pUnkOuter->QueryInterface(riid, ppv);
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::AddRef
- Summary: The AddRef IUnknown member of this IPaperSink interface
- implementation that delegates to m_pUnkOuter, whatever it is.
- Args: void
- Returns: ULONG
- Returned by the delegated outer AddRef call.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP_(ULONG) COPaperSink::CImpIPaperSink::AddRef(void)
- {
- // Delegate this call to the outer object's AddRef.
- return m_pUnkOuter->AddRef();
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Release
- Summary: The Release IUnknown member of this IPaperSink interface
- implementation that delegates to m_pUnkOuter, whatever it is.
- Args: void
- Returns: ULONG
- Returned by the delegated outer Release call.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP_(ULONG) COPaperSink::CImpIPaperSink::Release(void)
- {
- // Delegate this call to the outer object's Release.
- return m_pUnkOuter->Release();
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Locked
- Summary: The COPaper object was locked by a client.
- Args: void
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Locked(
- void)
- {
- HRESULT hr = E_NOTIMPL;
- // For future evolution.
- return hr;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Unlocked
- Summary: The COPaper object was Unlocked by a client.
- Args: void
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Unlocked(
- void)
- {
- HRESULT hr = E_NOTIMPL;
- // For future evolution.
- return hr;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Loaded
- Summary: The COPaper object's ink drawing data was loaded from a
- client's compound file.
- Args: void
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Loaded(
- void)
- {
- HRESULT hr;
- // We have been notified that a load was done. Thus, a whole new array
- // of ink data must be displayed in a cleared window of this client.
- m_pCO->m_pGuiPaper->ClearWin();
- hr = m_pCO->m_pGuiPaper->PaintWin();
- return hr;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Saved
- Summary: The COPaper object's drawing paper data was saved to a
- client's compound file.
- Args: void
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Saved(
- void)
- {
- HRESULT hr = E_NOTIMPL;
- // For future evolution.
- return hr;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::InkStart
- Summary: Client is being told to start a display ink drawing sequence.
- Args: SHORT nX,
- X coordinate of the start point.
- SHORT nY,
- Y coordinate of the start point.
- SHORT nWidth,
- Ink Width in pixels.
- COLORREF crInkColor)
- RGB Ink color to be used in the subsequent inking sequence.
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::InkStart(
- SHORT nX,
- SHORT nY,
- SHORT nWidth,
- COLORREF crInkColor)
- {
- // Only echo drawing action if we are not the current Master.
- if (!m_pCO->m_pGuiPaper->Master())
- {
- // Play the data back to the CGuiPaper for display only.
- m_pCO->m_pGuiPaper->InkWidth(nWidth);
- m_pCO->m_pGuiPaper->InkColor(crInkColor);
- m_pCO->m_pGuiPaper->InkStart(nX, nY);
- }
- return NOERROR;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::InkDraw
- Summary: Client is being told to draw/display ink drawing sequence data.
- Args: SHORT nX,
- X coordinate of the start point.
- SHORT nY,
- Y coordinate of the start point.
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::InkDraw(
- SHORT nX,
- SHORT nY)
- {
- // Only echo drawing action if we are not the current Master.
- if (!m_pCO->m_pGuiPaper->Master())
- {
- // Play the data back to the CGuiPaper for display only.
- m_pCO->m_pGuiPaper->InkDraw(nX, nY);
- }
- return NOERROR;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::InkStop
- Summary: Client is being told to stop an ink drawing sequence.
- Args: SHORT nX,
- X coordinate of the start point.
- SHORT nY,
- Y coordinate of the start point.
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::InkStop(
- SHORT nX,
- SHORT nY)
- {
- // Only echo drawing action if we are not the current Master.
- if (!m_pCO->m_pGuiPaper->Master())
- {
- // Stop the play of the data back to the CGuiPaper for display.
- m_pCO->m_pGuiPaper->InkStop(nX, nY);
- }
- return NOERROR;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Erased
- Summary: The COPaper object's drawing paper data was erased by a client.
- Args: void
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Erased(
- void)
- {
- HRESULT hr = E_FAIL;
- // Only echo drawing action if we are not the current Master.
- if (!m_pCO->m_pGuiPaper->Master())
- hr = m_pCO->m_pGuiPaper->Erase();
- return hr;
- }
- /*M+M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M+++M
- Method: COPaperSink::CImpIPaperSink::Resized
- Summary: The COPaper object's drawing rectangle was resized by a client.
- Args: LONG lWidth,
- Rectangle width in pixels.
- LONG lHeight)
- Rectangle height in pixels.
- Returns: HRESULT
- Standard result code. NOERROR for success.
- M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M---M-M*/
- STDMETHODIMP COPaperSink::CImpIPaperSink::Resized(
- LONG lWidth,
- LONG lHeight)
- {
- HRESULT hr = E_FAIL;
- // Only echo drawing action if we are not the current Master.
- if (!m_pCO->m_pGuiPaper->Master())
- hr = m_pCO->m_pGuiPaper->Resize(lWidth, lHeight);
- return hr;
- }