353 lines
9 KiB
C++
353 lines
9 KiB
C++
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/*++
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Copyright (C) 1996-1999 Microsoft Corporation
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Module Name:
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iviewobj.cpp
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Abstract:
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Implementation of the IViewObject interface.
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--*/
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#include "polyline.h"
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#include "unihelpr.h"
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#include "unkhlpr.h"
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/*
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* CImpIViewObject interface implementation
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*/
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IMPLEMENT_CONTAINED_INTERFACE(CPolyline, CImpIViewObject)
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/*
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* CImpIViewObject::Draw
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*
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* Purpose:
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* Draws the object on the given hDC specifically for the requested
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* aspect, device, and within the appropriate bounds.
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*
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* Parameters:
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* dwAspect DWORD aspect to draw.
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* lindex LONG index of the piece to draw.
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* pvAspect LPVOID for extra information, always NULL.
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* ptd DVTARGETDEVICE * containing device
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* information.
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* hICDev HDC containing the IC for the device.
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* hDC HDC on which to draw.
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* pRectBounds LPCRECTL describing the rectangle in which
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* to draw.
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* pRectWBounds LPCRECTL describing the placement rectangle
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* if part of what you draw is another metafile.
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* pfnContinue Function to call periodically during
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* long repaints.
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* dwContinue DWORD extra information to pass to the
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* pfnContinue.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::Draw(
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DWORD dwAspect,
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LONG lindex,
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LPVOID pvAspect,
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DVTARGETDEVICE *ptd,
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HDC hICDev,
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HDC hDC,
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LPCRECTL pRectBounds,
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LPCRECTL pRectWBounds,
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BOOL (CALLBACK *pfnContinue) (DWORD_PTR),
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DWORD_PTR dwContinue )
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{
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HRESULT hr = NOERROR;
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RECT rc;
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RECTL rectBoundsDP;
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BOOL bMetafile = FALSE;
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BOOL bDeleteDC = FALSE;
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HDC hLocalICDev;
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//Delegate iconic and printed representations.
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if (!((DVASPECT_CONTENT | DVASPECT_THUMBNAIL) & dwAspect)) {
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hr = m_pObj->m_pDefIViewObject->Draw(dwAspect, lindex
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, pvAspect, ptd, hICDev, hDC, pRectBounds, pRectWBounds
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, pfnContinue, dwContinue);
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} else {
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if ( NULL == hDC ) {
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hr = E_INVALIDARG;
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} else if ( NULL == pRectBounds ) {
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hr = E_POINTER;
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} else {
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if (hICDev == NULL) {
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hLocalICDev = CreateTargetDC(hDC, ptd);
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bDeleteDC = (hLocalICDev != hDC );
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} else {
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hLocalICDev = hICDev;
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}
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if ( NULL == hLocalICDev ) {
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hr = E_UNEXPECTED;
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} else {
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rectBoundsDP = *pRectBounds;
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bMetafile = GetDeviceCaps(hDC, TECHNOLOGY) == DT_METAFILE;
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if (!bMetafile) {
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::LPtoDP ( hLocalICDev, (LPPOINT)&rectBoundsDP, 2);
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SaveDC ( hDC );
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}
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RECTFROMRECTL(rc, rectBoundsDP);
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m_pObj->Draw(hDC, hLocalICDev, FALSE, TRUE, &rc);
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if (bDeleteDC)
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::DeleteDC(hLocalICDev);
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if (!bMetafile)
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RestoreDC(hDC, -1);
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hr = NOERROR;
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}
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}
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}
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return hr;
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}
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/*
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* CImpIViewObject::GetColorSet
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*
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* Purpose:
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* Retrieves the color palette used by the object.
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*
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* Parameters:
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* dwAspect DWORD aspect of interest.
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* lindex LONG piece of interest.
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* pvAspect LPVOID with extra information, always NULL.
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* ptd DVTARGETDEVICE * containing device info.
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* hICDev HDC containing the IC for the device.
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* ppColorSet LPLOGPALETTE * into which to return the
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* pointer to the palette in this color set.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::GetColorSet(
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DWORD, // dwDrawAspect
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LONG, // lindex
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LPVOID, // pvAspect,
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DVTARGETDEVICE *, // ptd
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HDC, // hICDev,
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LPLOGPALETTE * /* ppColorSet */) {
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return ResultFromScode(E_NOTIMPL);
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}
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/*
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* CImpIViewObject::Freeze
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*
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* Purpose:
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* Freezes the view of a particular aspect such that data
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* changes do not affect the view.
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*
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* Parameters:
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* dwAspect DWORD aspect to freeze.
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* lindex LONG piece index under consideration.
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* pvAspect LPVOID for further information, always NULL.
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* pdwFreeze LPDWORD in which to return the key.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::Freeze(DWORD dwAspect, LONG lindex
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, LPVOID pvAspect, LPDWORD pdwFreeze)
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{
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//Delegate anything for ICON or DOCPRINT aspects
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if (!((DVASPECT_CONTENT | DVASPECT_THUMBNAIL) & dwAspect))
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{
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return m_pObj->m_pDefIViewObject->Freeze(dwAspect, lindex
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, pvAspect, pdwFreeze);
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}
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if (dwAspect & m_pObj->m_dwFrozenAspects)
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{
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*pdwFreeze=dwAspect + FREEZE_KEY_OFFSET;
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return ResultFromScode(VIEW_S_ALREADY_FROZEN);
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}
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m_pObj->m_dwFrozenAspects |= dwAspect;
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if (NULL!=pdwFreeze)
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*pdwFreeze=dwAspect + FREEZE_KEY_OFFSET;
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return NOERROR;
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}
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/*
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* CImpIViewObject::Unfreeze
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*
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* Purpose:
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* Thaws an aspect frozen in ::Freeze. We expect that a container
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* will redraw us after freezing if necessary, so we don't send
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* any sort of notification here.
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*
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* Parameters:
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* dwFreeze DWORD key returned from ::Freeze.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::Unfreeze(DWORD dwFreeze)
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{
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DWORD dwAspect=dwFreeze - FREEZE_KEY_OFFSET;
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//Delegate anything for ICON or DOCPRINT aspects
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if (!((DVASPECT_CONTENT | DVASPECT_THUMBNAIL) & dwAspect))
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m_pObj->m_pDefIViewObject->Unfreeze(dwFreeze);
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//The aspect to unfreeze is in the key.
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m_pObj->m_dwFrozenAspects &= ~(dwAspect);
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/*
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* Since we always kept our current data up to date, we don't
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* have to do anything thing here like requesting data again.
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* Because we removed dwAspect from m_dwFrozenAspects, Draw
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* will again use the current data.
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*/
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return NOERROR;
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}
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/*
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* CImpIViewObject::SetAdvise
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*
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* Purpose:
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* Provides an advise sink to the view object enabling
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* notifications for a specific aspect.
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*
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* Parameters:
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* dwAspects DWORD describing the aspects of interest.
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* dwAdvf DWORD containing advise flags.
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* pIAdviseSink LPADVISESINK to notify.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::SetAdvise(DWORD dwAspects, DWORD dwAdvf
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, LPADVISESINK pIAdviseSink)
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{
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//Pass anything with DVASPECT_ICON or _DOCPRINT to the handler.
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if (!((DVASPECT_CONTENT | DVASPECT_THUMBNAIL) & dwAspects))
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{
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m_pObj->m_pDefIViewObject->SetAdvise(dwAspects, dwAdvf
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, pIAdviseSink);
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}
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//We continue because dwAspects may have more than one in it.
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if (NULL!=m_pObj->m_pIAdviseSink)
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m_pObj->m_pIAdviseSink->Release();
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m_pObj->m_pIAdviseSink=pIAdviseSink;
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m_pObj->m_dwAdviseAspects=dwAspects;
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m_pObj->m_dwAdviseFlags=dwAdvf;
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if (NULL!=m_pObj->m_pIAdviseSink)
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m_pObj->m_pIAdviseSink->AddRef();
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return NOERROR;
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}
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/*
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* CImpIViewObject::GetAdvise
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*
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* Purpose:
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* Returns the last known IAdviseSink seen by ::SetAdvise.
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*
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* Parameters:
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* pdwAspects LPDWORD in which to store the last
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* requested aspects.
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* pdwAdvf LPDWORD in which to store the last
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* requested flags.
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* ppIAdvSink LPADVISESINK * in which to store the
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* IAdviseSink.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::GetAdvise(LPDWORD pdwAspects
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, LPDWORD pdwAdvf, LPADVISESINK *ppAdvSink)
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{
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if (NULL != ppAdvSink) {
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*ppAdvSink = m_pObj->m_pIAdviseSink;
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if (m_pObj->m_pIAdviseSink != NULL)
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m_pObj->m_pIAdviseSink->AddRef();
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}
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if (NULL != pdwAspects)
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*pdwAspects = m_pObj->m_dwAdviseAspects;
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if (NULL != pdwAdvf)
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*pdwAdvf = m_pObj->m_dwAdviseFlags;
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return NOERROR;
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}
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/*
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* CImpIViewObject::GetExtent
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*
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* Purpose:
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* Retrieves the extents of the object's display.
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*
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* Parameters:
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* dwAspect DWORD of the aspect of interest.
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* lindex LONG index of the piece of interest.
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* ptd DVTARGETDEVICE * with device information.
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* pszl LPSIZEL to the structure in which to return
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* the extents.
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*
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* Return Value:
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* HRESULT NOERROR or a general error value.
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*/
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STDMETHODIMP CImpIViewObject::GetExtent(DWORD dwAspect, LONG lindex
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, DVTARGETDEVICE *ptd, LPSIZEL pszl)
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{
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RECT rc;
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if (!(DVASPECT_CONTENT & dwAspect))
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{
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return m_pObj->m_pDefIViewObject->GetExtent(dwAspect
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, lindex, ptd, pszl);
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}
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m_pObj->m_pImpIPolyline->RectGet(&rc);
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m_pObj->RectConvertMappings(&rc, FALSE);
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pszl->cx=rc.right-rc.left;
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pszl->cy=rc.bottom-rc.top;
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return NOERROR;
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}
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