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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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mfc
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src
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ctlview.cpp
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C/C++ Source or Header
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1998-06-16
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9KB
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357 lines
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#ifdef AFXCTL_CORE2_SEG
#pragma code_seg(AFXCTL_CORE2_SEG)
#endif
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define new DEBUG_NEW
/////////////////////////////////////////////////////////////////////////////
// COleControl overridables for IViewObject implementation
BOOL COleControl::OnGetColorSet(DVTARGETDEVICE*, HDC, LPLOGPALETTE*)
{
// Can be overridden by subclass
return FALSE;
}
BOOL COleControl::OnGetViewExtent(DWORD dwDrawAspect, LONG /* lindex */,
DVTARGETDEVICE* /* ptd */, LPSIZEL lpsizel)
{
// Can be overridden by subclass for two-pass drawing
if (dwDrawAspect == DVASPECT_OPAQUE || dwDrawAspect == DVASPECT_TRANSPARENT)
dwDrawAspect = DVASPECT_CONTENT;
return SUCCEEDED(m_xOleObject.GetExtent(dwDrawAspect, lpsizel));
}
BOOL COleControl::OnGetViewRect(DWORD dwAspect, LPRECTL pRect)
{
// Can be overridden by subclass for two-pass drawing
SIZEL size;
OnGetViewExtent(dwAspect, -1, NULL, &size);
pRect->left = 0;
pRect->top = 0;
pRect->right = size.cx;
pRect->bottom = -size.cy;
return TRUE;
}
DWORD COleControl::OnGetViewStatus()
{
// Can be overridden by subclass for two-pass drawing
return VIEWSTATUS_OPAQUE;
}
BOOL COleControl::OnQueryHitPoint(DWORD dwAspect, LPCRECT /* pRectBounds */,
POINT /* ptlLoc */, LONG /* lCloseHint */, DWORD* pHitResult)
{
// Can be overridden by subclass for non-rectangular hit-testing
if (dwAspect == DVASPECT_CONTENT)
{
*pHitResult = HITRESULT_HIT;
return TRUE;
}
else
{
return FALSE;
}
}
BOOL COleControl::OnQueryHitRect(DWORD dwAspect, LPCRECT /* pRectBounds */,
LPCRECT /* prcLoc */, LONG /* lCloseHint */, DWORD* pHitResult)
{
// Can be overridden by subclass for non-rectangular hit-testing
if (dwAspect == DVASPECT_CONTENT)
{
*pHitResult = HITRESULT_HIT;
return TRUE;
}
else
{
return FALSE;
}
}
BOOL COleControl::OnGetNaturalExtent(DWORD /* dwAspect */, LONG /* lindex */,
DVTARGETDEVICE* /* ptd */, HDC /* hicTargetDev */,
DVEXTENTINFO* /* pExtentInfo */, LPSIZEL /* psizel */)
{
// Can be overridden by subclass to provide sizing hints
return FALSE;
}
/////////////////////////////////////////////////////////////////////////////
// COleControl::XViewObject
STDMETHODIMP_(ULONG) COleControl::XViewObject::AddRef()
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return (ULONG)pThis->ExternalAddRef();
}
STDMETHODIMP_(ULONG) COleControl::XViewObject::Release()
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return (ULONG)pThis->ExternalRelease();
}
STDMETHODIMP COleControl::XViewObject::QueryInterface(
REFIID iid, LPVOID* ppvObj)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}
STDMETHODIMP COleControl::XViewObject::Draw(DWORD dwDrawAspect, LONG lindex,
void* pvAspect, DVTARGETDEVICE* ptd, HDC hicTargetDev, HDC hdcDraw,
LPCRECTL lprcBounds, LPCRECTL lprcWBounds,
BOOL (CALLBACK* pfnContinue)(DWORD), DWORD dwContinue)
{
METHOD_PROLOGUE_EX(COleControl, ViewObject)
HRESULT hResult = S_OK;
CRect rc;
if (lprcBounds == NULL)
{
if (pThis->m_bInPlaceSiteWndless)
rc.CopyRect(pThis->m_rcPos);
else
return E_INVALIDARG;
}
else
{
rc.SetRect((int)lprcBounds->left, (int)lprcBounds->top,
(int)lprcBounds->right, (int)lprcBounds->bottom);
}
// Check if optimized drawing is permitted
if (pvAspect != NULL && (pThis->GetControlFlags() & canOptimizeDraw))
{
pThis->m_bOptimizedDraw = (((DVASPECTINFO*)pvAspect)->dwFlags &
DVASPECTINFOFLAG_CANOPTIMIZE);
}
AfxLockTempMaps();
// Convert from rectangle from logical to device coordinates,
// save DC state, and switch to MM_TEXT mode. After drawing,
// restore DC state.
switch (dwDrawAspect)
{
case DVASPECT_CONTENT:
if (GetDeviceCaps(hdcDraw, TECHNOLOGY) == DT_METAFILE)
{
// If attributes DC is NULL, create one, based on ptd.
HDC hAttribDC = hicTargetDev;
if (hicTargetDev == NULL)
hAttribDC = ::_AfxOleCreateDC(ptd);
// Draw into the metafile DC.
CMetaFileDC dc;
dc.Attach(hdcDraw);
dc.SetAttribDC(hAttribDC);
pThis->DrawMetafile(&dc, rc);
dc.SetAttribDC(NULL);
dc.Detach();
// If we created an attributes DC, delete it now.
if (hicTargetDev == NULL)
::DeleteDC(hAttribDC);
}
else
{
CDC* pDC = CDC::FromHandle(hdcDraw);
pThis->DrawContent(pDC, rc);
}
break;
default:
if (pThis->m_pDefIViewObject == NULL)
pThis->m_pDefIViewObject =
(LPVIEWOBJECT)pThis->QueryDefHandler(IID_IViewObject);
if (pThis->m_pDefIViewObject != NULL)
{
hResult = pThis->m_pDefIViewObject->Draw(
dwDrawAspect, lindex, pvAspect, ptd, hicTargetDev, hdcDraw,
lprcBounds, lprcWBounds, pfnContinue, dwContinue);
}
}
AfxUnlockTempMaps();
pThis->m_bOptimizedDraw = FALSE;
return hResult;
}
STDMETHODIMP COleControl::XViewObject::GetColorSet(DWORD dwDrawAspect,
LONG lindex, void*, DVTARGETDEVICE* ptd, HDC hicTargetDev,
LPLOGPALETTE* ppColorSet)
{
METHOD_PROLOGUE_EX(COleControl, ViewObject)
HRESULT hr = E_FAIL;
if ((dwDrawAspect == DVASPECT_CONTENT) && (lindex == -1) &&
pThis->OnGetColorSet(ptd, hicTargetDev, ppColorSet))
{
hr = S_OK;
}
return hr;
}
STDMETHODIMP COleControl::XViewObject::Freeze(DWORD, LONG, void*, DWORD*)
{
return E_NOTIMPL;
}
STDMETHODIMP COleControl::XViewObject::Unfreeze(DWORD)
{
return E_NOTIMPL;
}
STDMETHODIMP COleControl::XViewObject::SetAdvise(DWORD aspects, DWORD advf,
LPADVISESINK pAdvSink)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
_AFXCTL_ADVISE_INFO** ppAdviseInfo = &pThis->m_pAdviseInfo;
// Allocate space for advise info, if necessary.
if (*ppAdviseInfo == NULL)
{
TRY
*ppAdviseInfo = new _AFXCTL_ADVISE_INFO;
END_TRY
if (*ppAdviseInfo == NULL)
return E_OUTOFMEMORY;
}
_AFXCTL_ADVISE_INFO* pAdviseInfo = *ppAdviseInfo;
// Release previous sink, if any.
if (pAdviseInfo->m_pAdvSink != NULL)
pAdviseInfo->m_pAdvSink->Release();
// Store new advise info.
pAdviseInfo->m_dwAspects = aspects;
pAdviseInfo->m_dwAdvf = advf;
pAdviseInfo->m_pAdvSink = pAdvSink;
if (pAdvSink != NULL)
pAdvSink->AddRef();
return S_OK;
}
STDMETHODIMP COleControl::XViewObject::GetAdvise(DWORD* pAspects, DWORD* pAdvf,
LPADVISESINK* ppAdvSink)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
_AFXCTL_ADVISE_INFO* pAdviseInfo = pThis->m_pAdviseInfo;
if ((pAdviseInfo != NULL) && (pAdviseInfo->m_pAdvSink != NULL))
{
if (pAspects != NULL)
*pAspects = pAdviseInfo->m_dwAspects;
if (pAdvf != NULL)
*pAdvf = pAdviseInfo->m_dwAdvf;
if (ppAdvSink != NULL)
{
*ppAdvSink = pAdviseInfo->m_pAdvSink;
if (*ppAdvSink != NULL)
(*ppAdvSink)->AddRef();
}
}
else
{
if (pAspects != NULL)
*pAspects = 0;
if (pAdvf != NULL)
*pAdvf = 0;
if (ppAdvSink != NULL)
*ppAdvSink = NULL;
}
return S_OK;
}
STDMETHODIMP COleControl::XViewObject::GetExtent(DWORD dwDrawAspect,
LONG lindex, DVTARGETDEVICE* ptd, LPSIZEL lpsizel)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return pThis->OnGetViewExtent(dwDrawAspect, lindex, ptd, lpsizel) ? S_OK :
E_FAIL;
}
STDMETHODIMP COleControl::XViewObject::GetRect(DWORD dwAspect, LPRECTL pRect)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return pThis->OnGetViewRect(dwAspect, pRect) ? S_OK : DV_E_DVASPECT;
}
STDMETHODIMP COleControl::XViewObject::GetViewStatus(DWORD* pdwStatus)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
*pdwStatus = pThis->OnGetViewStatus();
return S_OK;
}
STDMETHODIMP COleControl::XViewObject::QueryHitPoint(DWORD dwAspect,
LPCRECT pRectBounds, POINT ptlLoc, LONG lCloseHint, DWORD* pHitResult)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return pThis->OnQueryHitPoint(dwAspect, pRectBounds, ptlLoc, lCloseHint,
pHitResult) ? S_OK : E_FAIL;
}
STDMETHODIMP COleControl::XViewObject::QueryHitRect(DWORD dwAspect,
LPCRECT pRectBounds, LPCRECT prcLoc, LONG lCloseHint, DWORD* pHitResult)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return pThis->OnQueryHitRect(dwAspect, pRectBounds, prcLoc, lCloseHint,
pHitResult) ? S_OK : E_FAIL;
}
STDMETHODIMP COleControl::XViewObject::GetNaturalExtent(DWORD dwAspect,
LONG lindex, DVTARGETDEVICE* ptd, HDC hicTargetDev,
DVEXTENTINFO* pExtentInfo, LPSIZEL psizel)
{
METHOD_PROLOGUE_EX_(COleControl, ViewObject)
return pThis->OnGetNaturalExtent(dwAspect, lindex, ptd, hicTargetDev,
pExtentInfo, psizel) ? S_OK : E_NOTIMPL;
}
/////////////////////////////////////////////////////////////////////////////
// Force any extra compiler-generated code into AFX_INIT_SEG
#ifdef AFX_INIT_SEG
#pragma code_seg(AFX_INIT_SEG)
#endif