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control.cpp
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C/C++ Source or Header
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1995-05-03
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17KB
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789 lines
/*
* CONTROL.CPP
* Polyline Chapter 24
*
* Additional interfaces above the Chapter 23 version of Polyline
* to make it an OLE Control, specifically ISpecifyPropertyPages,
* IProvideClassInfo, IOleControl, and IDispatch, none of which
* are terribly complex.
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "polyline.h"
//ISpecifyPropertyPages implementation
/*
* CImpISpecifyPP::CImpISpecifyPP
* CImpISpecifyPP::~CImpISpecifyPP
*
* Parameters (Constructor):
* pObj PCPolyline of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpISpecifyPP::CImpISpecifyPP(PCPolyline pObj, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpISpecifyPP::~CImpISpecifyPP(void)
{
return;
}
/*
* CImpISpecifyPP::QueryInterface
* CImpISpecifyPP::AddRef
* CImpISpecifyPP::Release
*/
STDMETHODIMP CImpISpecifyPP::QueryInterface(REFIID riid
, LPVOID *ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpISpecifyPP::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpISpecifyPP::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpISpecifyPP::GetPages
*
* Purpose:
* Returns an array of GUIDs identifying the indivudual property
* pages used for this object.
*
* Parameters:
* pPages CAUUID * pointing to a counted array of GUIDs.
* This function allocates the array elements
* and stores them in this structure.
*/
STDMETHODIMP CImpISpecifyPP::GetPages(CAUUID *pPages)
{
IMalloc *pIMalloc;
GUID *pGUID;
pPages->cElems=0;
pPages->pElems=NULL;
if (FAILED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
return ResultFromScode(E_OUTOFMEMORY);
pGUID=(GUID *)pIMalloc->Alloc(CPROPPAGES * sizeof(GUID));
if (NULL!=pGUID)
{
//We use our own page plus the standard color page.
pGUID[0]=CLSID_PolylinePropPage;
//Fill the structure and return.
pPages->cElems=CPROPPAGES;
pPages->pElems=pGUID;
}
pIMalloc->Release();
return (NULL!=pGUID) ? NOERROR
: ResultFromScode(E_OUTOFMEMORY);
}
//IProvideClassInfo interface implementation
/*
* CImpIProvideClassInfo::CImpIProvideClassInfo
* CImpIProvideClassInfo::~CImpIProvideClassInfo
*
* Parameters (Constructor):
* pObj PCPolyline of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpIProvideClassInfo::CImpIProvideClassInfo(PCPolyline pObj
, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpIProvideClassInfo::~CImpIProvideClassInfo(void)
{
return;
}
/*
* CImpIProvideClassInfo::QueryInterface
* CImpIProvideClassInfo::AddRef
* CImpIProvideClassInfo::Release
*/
STDMETHODIMP CImpIProvideClassInfo::QueryInterface(REFIID riid
, LPVOID *ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpIProvideClassInfo::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpIProvideClassInfo::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpIProvideClassInfo::GetClassInfo
*
* Purpose:
* Returns the ITypeInfo through which the caller can retrieve
* information about the entire object.
*
* Parameters:
* ppTI LPTYPEINFO * in which to store the ITypeInfo
* pointer.
*/
STDMETHODIMP CImpIProvideClassInfo::GetClassInfo(LPTYPEINFO *ppTI)
{
if (NULL==ppTI)
return ResultFromScode(E_POINTER);
*ppTI=NULL;
return m_pObj->m_pITypeLib->GetTypeInfoOfGuid(CLSID_Polyline19
, ppTI);
}
//IDispatch interface implementation
/*
* CImpIDispatch::CImpIDispatch
* CImpIDispatch::~CImpIDispatch
*
* Parameters (Constructor):
* pObj PCPolyline of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpIDispatch::CImpIDispatch(PCPolyline pObj, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpIDispatch::~CImpIDispatch(void)
{
return;
}
/*
* CImpIDispatch::QueryInterface
* CImpIDispatch::AddRef
* CImpIDispatch::Release
*/
STDMETHODIMP CImpIDispatch::QueryInterface(REFIID riid, PPVOID ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpIDispatch::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpIDispatch::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpIDispatch::GetTypeInfoCount
* CImpIDispatch::GetTypeInfo
* CImpIDispatch::GetIDsOfNames
*
* The usual
*/
STDMETHODIMP CImpIDispatch::GetTypeInfoCount(UINT *pctInfo)
{
//We implement GetTypeInfo so return 1
*pctInfo=1;
return NOERROR;
}
STDMETHODIMP CImpIDispatch::GetTypeInfo(UINT itInfo, LCID lcid
, ITypeInfo **ppITypeInfo)
{
if (0!=itInfo)
return ResultFromScode(TYPE_E_ELEMENTNOTFOUND);
if (NULL==ppITypeInfo)
return ResultFromScode(E_POINTER);
*ppITypeInfo=NULL;
//We ignore the LCID
return m_pObj->m_pITypeLib->GetTypeInfoOfGuid
(DIID_DIPolylineControl, ppITypeInfo);
}
STDMETHODIMP CImpIDispatch::GetIDsOfNames(REFIID riid
, OLECHAR **rgszNames, UINT cNames, LCID lcid, DISPID *rgDispID)
{
HRESULT hr;
ITypeInfo *pTI;
if (IID_NULL!=riid)
return ResultFromScode(DISP_E_UNKNOWNINTERFACE);
hr=GetTypeInfo(0, lcid, &pTI);
if (SUCCEEDED(hr))
{
hr=DispGetIDsOfNames(pTI, rgszNames, cNames, rgDispID);
pTI->Release();
}
return hr;
}
/*
* CImpIDispatch::Invoke
*
* Purpose:
* Calls a method in the dispatch interface or manipulates a
* property.
*
* Parameters:
* dispID DISPID of the method or property of interest.
* riid REFIID reserved, must be IID_NULL.
* lcid LCID of the locale.
* wFlags USHORT describing the context of the invocation.
* pDispParams DISPPARAMS * to the array of arguments.
* pVarResult VARIANT * in which to store the result. Is
* NULL if the caller is not interested.
* pExcepInfo EXCEPINFO * to exception information.
* puArgErr UINT * in which to store the index of an
* invalid parameter if DISP_E_TYPEMISMATCH
* is returned.
*
* Return Value:
* HRESULT NOERROR or a general error code.
*/
STDMETHODIMP CImpIDispatch::Invoke(DISPID dispID, REFIID riid
, LCID lcid, unsigned short wFlags, DISPPARAMS *pDispParams
, VARIANT *pVarResult, EXCEPINFO *pExcepInfo, UINT *puArgErr)
{
HRESULT hr;
ITypeInfo *pTI;
//riid is supposed to be IID_NULL always
if (IID_NULL!=riid)
return ResultFromScode(DISP_E_UNKNOWNINTERFACE);
//Get the ITypeInfo for lcid
hr=GetTypeInfo(0, lcid, &pTI);
if (FAILED(hr))
return hr;
hr=pTI->Invoke(m_pObj->m_pImpIPolylineControl, dispID, wFlags
, pDispParams, pVarResult, pExcepInfo, puArgErr);
pTI->Release();
return hr;
}
//IPolylineControl interface implementation
/*
* CImpIPolylineControl::CImpIPolylineControl
* CImpIPolylineControl::~CImpIPolylineControl
*
* Parameters (Constructor):
* pObj PCPolyline of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpIPolylineControl::CImpIPolylineControl(PCPolyline pObj
, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpIPolylineControl::~CImpIPolylineControl(void)
{
return;
}
/*
* CImpIPolylineControl::QueryInterface
* CImpIPolylineControl::AddRef
* CImpIPolylineControl::Release
*/
STDMETHODIMP CImpIPolylineControl::QueryInterface(REFIID riid
, LPVOID *ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpIPolylineControl::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpIPolylineControl::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpIPolylineControl::BackColor
* CImpIPolylineControl::LineColor
* CImpIPolylineControl::LineStyle
* CImpIPolylineControl::Clear
* CImpIPolylineControl::RemoveLastPoint
*
* Purpose:
* Dispatch interface entry points that map to IPolyline
* members.
*/
STDMETHODIMP_(void) CImpIPolylineControl::put_BackColor
(OLE_COLOR cr)
{
COLORREF crOld;
m_pObj->m_pImpIPolyline->ColorSet(POLYLINECOLOR_BACKGROUND
, cr, &crOld);
return;
}
STDMETHODIMP_(OLE_COLOR) CImpIPolylineControl::get_BackColor(void)
{
COLORREF cr;
m_pObj->m_pImpIPolyline->ColorGet(POLYLINECOLOR_BACKGROUND
, &cr);
return cr;
}
STDMETHODIMP_(void) CImpIPolylineControl::put_LineColor
(OLE_COLOR cr)
{
COLORREF crOld;
m_pObj->m_pImpIPolyline->ColorSet(POLYLINECOLOR_LINE
, cr, &crOld);
return;
}
STDMETHODIMP_(OLE_COLOR) CImpIPolylineControl::get_LineColor(void)
{
COLORREF cr;
m_pObj->m_pImpIPolyline->ColorGet(POLYLINECOLOR_LINE, &cr);
return cr;
}
STDMETHODIMP_(void) CImpIPolylineControl::put_LineStyle
(short iStyle)
{
UINT i;
m_pObj->m_pImpIPolyline->LineStyleSet(iStyle, &i);
return;
}
STDMETHODIMP_(short) CImpIPolylineControl::get_LineStyle(void)
{
UINT iStyle;
m_pObj->m_pImpIPolyline->LineStyleGet(&iStyle);
return (short)iStyle;
}
STDMETHODIMP CImpIPolylineControl::Clear(void)
{
return m_pObj->m_pImpIPolyline->New();
}
STDMETHODIMP CImpIPolylineControl::RemoveLastPoint(void)
{
return m_pObj->m_pImpIPolyline->Undo();
}
//IOleControl interface implementation
/*
* CImpIOleControl::CImpIOleControl
* CImpIOleControl::~CImpIOleControl
*
* Parameters (Constructor):
* pObj PCPolyline of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpIOleControl::CImpIOleControl(PCPolyline pObj
, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpIOleControl::~CImpIOleControl(void)
{
return;
}
/*
* CImpIOleControl::QueryInterface
* CImpIOleControl::AddRef
* CImpIOleControl::Release
*/
STDMETHODIMP CImpIOleControl::QueryInterface(REFIID riid
, LPVOID *ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpIOleControl::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpIOleControl::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpIOleControl::GetControlInfo
*
* Purpose:
* Fills a CONTROLINFO structure containing information about
* the controls mnemonics and other behavioral aspects.
*
* Parameters:
* pCI LPCONTROLINFO to the structure to fill
*/
STDMETHODIMP CImpIOleControl::GetControlInfo(LPCONTROLINFO pCI)
{
if (NULL==pCI)
return ResultFromScode(E_INVALIDARG);
*pCI=m_pObj->m_ctrlInfo;
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpIOleControl::OnMnemonic
*
* Purpose:
* Notifies the control that a mnemonic was activated.
*
* Parameters:
* pMsg LPMSG containing the message that matches one of
* the control's mnemonics. The control uses this
* to distinguish which mnemonic was pressed.
*/
STDMETHODIMP CImpIOleControl::OnMnemonic(LPMSG pMsg)
{
//No mnemonics
return NOERROR;
}
/*
* CImpIOleControl::OnAmbientPropertyChange
*
* Purpose:
* Notifies the control that one or more of the container's ambient
* properties changed.
*
* Parameters:
* dispID DISPID identifying the property, which can
* be DISPID_UNKNOWN indicating that more than
* one changed.
*/
STDMETHODIMP CImpIOleControl::OnAmbientPropertyChange(DISPID dispID)
{
/*
* We detect any change in UIDead or ShowHatching. Changes
* in container colors do not affect us as we only use those
* for initial values.
*/
switch (dispID)
{
case DISPID_UNKNOWN:
m_pObj->AmbientsInitialize(INITAMBIENT_SHOWHATCHING
| INITAMBIENT_UIDEAD);
break;
case DISPID_AMBIENT_SHOWHATCHING:
m_pObj->AmbientsInitialize(INITAMBIENT_SHOWHATCHING);
break;
case DISPID_AMBIENT_UIDEAD:
m_pObj->AmbientsInitialize(INITAMBIENT_UIDEAD);
break;
}
return NOERROR;
}
/*
* CImpIOleControl::FreezeEvents
*
* Purpose:
* Instructs the control to stop firing events or to continue
* firing them.
*
* Parameters:
* fFreeze BOOL indicating to freeze (TRUE) or thaw (FALSE)
* events from this control.
*/
STDMETHODIMP CImpIOleControl::FreezeEvents(BOOL fFreeze)
{
m_pObj->m_fFreezeEvents=fFreeze;
return NOERROR;
}
//CAdviseRouter class implementation
/*
* CAdviseRouter::CAdviseRouter
* CAdviseRouter::~CAdviseRouter
*
* Constructor Parameters:
* pIDispatch IDispatch * to which we route notifications.
* pObj PCPolyline to the control itself.
*/
CAdviseRouter::CAdviseRouter(IDispatch *pIDispatch
, PCPolyline pObj)
{
m_cRef=0;
m_pObj=pObj;
m_pIDispatch=pIDispatch;
return;
}
CAdviseRouter::~CAdviseRouter(void)
{
ReleaseInterface(m_pIDispatch);
return;
}
/*
* CAdviseRouter::QueryInterface
* CAdviseRouter::AddRef
* CAdviseRouter::Release
*
* Purpose:
* IUnknown members for this IPolylineAdviseSink implementations.
*/
STDMETHODIMP CAdviseRouter::QueryInterface(REFIID riid
, PPVOID ppv)
{
*ppv=NULL;
if (IID_IUnknown==riid || IID_IPolylineAdviseSink10==riid)
{
*ppv=this;
AddRef();
return NOERROR;
}
return ResultFromScode(E_NOINTERFACE);
}
STDMETHODIMP_(ULONG) CAdviseRouter::AddRef(void)
{
return ++m_cRef;
}
STDMETHODIMP_(ULONG) CAdviseRouter::Release(void)
{
if (0L!=--m_cRef)
return m_cRef;
delete this;
return 0;
}
/*
* CAdviseRouter::OnPointChange
* CAdviseRouter::OnSizeChange
* CAdviseRouter::OnColorChange
* CAdviseRouter::OnLineStyleChange
*
* Purpose:
* Invokes the same member in the IDispatch pointer we hold.
*/
STDMETHODIMP_(void) CAdviseRouter::OnPointChange(void)
{
Invoke(EVENT_ONPOINTCHANGE);
return;
}
STDMETHODIMP_(void) CAdviseRouter::OnSizeChange(void)
{
Invoke(EVENT_ONSIZECHANGE);
return;
}
STDMETHODIMP_(void) CAdviseRouter::OnColorChange(void)
{
Invoke(EVENT_ONCOLORCHANGE);
return;
}
STDMETHODIMP_(void) CAdviseRouter::OnLineStyleChange(void)
{
Invoke(EVENT_ONLINESTYLECHANGE);
return;
}
/*
* CAdviseRouter::Invoke
*
* Purpose:
* Calls IDispatch::Invoke for any of the events we handle.
* None of these have any arguments.
*
* Parameters:
* dispID DISPID of the event to fire.
*
* Return Value:
* None
*/
void CAdviseRouter::Invoke(DISPID dispID)
{
DISPPARAMS dp;
VARIANT va;
if (m_pObj->m_fFreezeEvents)
return;
m_pIDispatch->Invoke(dispID, IID_NULL
, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &dp
, &va, NULL, NULL);
return;
}