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C Programming Starter Kit 2.0
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bc45
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ocfsrc.pak
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OCDATA.CPP
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C/C++ Source or Header
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1997-07-23
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232 lines
//
//----------------------------------------------------------------------------
// ObjectComponents
// (C) Copyright 1994 by Borland International, All Rights Reserved
//
// Implementation of TOcDataProvider Class
//----------------------------------------------------------------------------
#include <ocf/ocfpch.h>
#include <ocf/ocapp.h>
#include <ocf/ocdata.h>
TOcDataProvider::TOcDataProvider(TOcView& ocView, TRegList* regList, IUnknown* outer,
void* userData, TDeleteUserData callBack)
:
OcView(ocView), BSite(0), BSiteI(0), BLSiteI(0),
UserData(userData), CBDelete(callBack),
#if defined(BI_DATA_NEAR)
Origin(*new TPoint(0,0)),
Extent(*new TSize(0,0))
#else
Origin(0,0),
Extent(0,0)
#endif
{
SetOuter(outer);
AddRef(); // TUnknown defaults to 0, we need 1
// Create a site for this data provider
//
if (SUCCEEDED(OcView.OcApp.BOleComponentCreate(&BSite, (IUnknown*)(IBDataProvider*)this,
cidBOleSite))) {
if (SUCCEEDED(BSite->QueryInterface(IID_IBSite, &(LPVOID)BSiteI)))
Release();
// Connect the part and the site
//
if (BSiteI) {
const char* progid = regList->Lookup(OcView.OcApp.IsOptionSet(amDebug) ?
"debugprogid" : "progid");
BSiteI->Init(this, 0, OleStr(progid), true);
}
if (SUCCEEDED(BSite->QueryInterface(IID_IBLinkable,&(LPVOID)BLSiteI)))
BLSiteI->Release(); // avoid deadlock
// Remember the dataprovider in OcView
//
OcView.SetOcData(this);
// Set up monikers for selection
//
Rename();
}
}
TOcDataProvider::~TOcDataProvider()
{
// If the TOcDataProvider object is released by the clipboard
//
if (OcView.GetOcData() == this)
OcView.SetOcData(0);
// user data clean up
//
if (CBDelete)
CBDelete(UserData);
if(BSite)
BSite->Release();
}
//
//
//
HRESULT
TOcDataProvider::QueryObject(const IID far& iid, void far* far* iface)
{
PRECONDITION(iface);
HRESULT hr;
// interfaces
//
SUCCEEDED(hr = IBDataProvider_QueryInterface(this, iid, iface))
// helpers
//
|| (BSite && SUCCEEDED(hr = BSite->QueryInterface(iid, iface)))
;
return hr;
}
//
// Disconnect from the site
//
void
TOcDataProvider::Disconnect()
{
if (BSiteI)
BSiteI->Disconnect();
}
//
// Update item moniker with new name
//
void
TOcDataProvider::Rename()
{
PRECONDITION(BLSiteI);
OcView.Rename();
// Update the item's moniker
//
TOcItemName item(true);
if (OcView.ForwardEvent(OC_VIEWGETITEMNAME, &item))
BLSiteI->OnRename(OcView.BLDocumentI, OleStr(item.Name));
}
UINT _IFUNC
TOcDataProvider::CountFormats()
{
return OcView.CountFormats();
}
HRESULT _IFUNC
TOcDataProvider::GetFormat(uint index, TOcFormatInfo far* fmt)
{
PRECONDITION(fmt);
return OcView.GetFormat(index, fmt);
}
//
// Request native data for pasting into client application.
// This is only called at paste time (not at copy time).
//
HANDLE _IFUNC
TOcDataProvider::GetFormatData(TOcFormatInfo far* fmt)
{
PRECONDITION(fmt);
TOcFormat* format = OcView.FormatList.Find(fmt->Id);
if (!format || (*format->GetRegName() == 0))
return 0;
TOcFormatData formatData(*format, UserData);
if (OcView.ForwardEvent(OC_VIEWCLIPDATA, &formatData))
return formatData.Handle;
else
return 0;
}
//
// Render the data in the DC provided. May be a MetaFile
// Packup all the args & forward message to real view to paint
//
HRESULT _IFUNC
TOcDataProvider::Draw(HDC dc, const RECTL far* pos, const RECTL far* clip,
TOcAspect aspect, TOcDraw bd)
{
PRECONDITION(dc);
bool metafile = ::GetDeviceCaps(dc, TECHNOLOGY) == DT_METAFILE;
// Rely on the bolero shading
//
if (bd == drShadingOnly)
return HR_NOERROR;
TRect p((int)pos->left, (int)pos->top, (int)pos->right, (int)pos->bottom);
TRect c((int)clip->left, (int)clip->top, (int)clip->right, (int)clip->bottom);
if (metafile) {
p.SetNull();
::SetMapMode(dc, MM_ANISOTROPIC);
::SetWindowExtEx(dc, Extent.cx, Extent.cy, 0);
::SetWindowOrgEx(dc, 0, 0, 0);
}
p.Normalize();
c.Normalize();
TOcViewPaint vp = { dc, &p, &c, (TOcAspect)aspect, true, 0, UserData };
bool result = (bool)OcView.ForwardEvent(OC_VIEWPAINT, &vp);
return HRFailIfZero(result);
}
//
// Return the 'size' of the document that this view is on
//
HRESULT _IFUNC
TOcDataProvider::GetPartSize(TSize far* size)
{
TOcPartSize ps(true, 0, UserData);
// Ask the app for initial server extent
//
if (!OcView.ForwardEvent(OC_VIEWPARTSIZE, &ps)) {
// An empty rect as default means that the container
// decides the size for this server
//
ps.PartRect.SetNull();
}
Extent = ps.PartRect.Size();
Origin = ps.PartRect.TopLeft();
*size = Extent;
return HR_NOERROR;
}
//
// Save the selection that we are a view on
//
HRESULT _IFUNC
TOcDataProvider::Save(IStorage* storage, BOOL sameAsLoad, BOOL remember)
{
PRECONDITION(storage);
TOcSaveLoad ocSave(storage, static_cast<bool>(sameAsLoad),
static_cast<bool>(remember), true, UserData);
return HRFailIfZero((bool)OcView.ForwardEvent(OC_VIEWSAVEPART, &ocSave));
}