home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
C Programming Starter Kit 2.0
/
SamsPublishing-CProgrammingStarterKit-v2.0-Win31.iso
/
bc45
/
owlsrc.pak
/
METAFILE.CPP
< prev
next >
Wrap
C/C++ Source or Header
|
1997-07-23
|
5KB
|
187 lines
//----------------------------------------------------------------------------
// ObjectWindows
// (C) Copyright 1992, 1994 by Borland International, All Rights Reserved
//
// Implementation of TMetaFilePict class
//----------------------------------------------------------------------------
#pragma hdrignore SECTION
#include <owl/owlpch.h>
#include <owl/metafile.h>
#include <owl/gdiobjec.h>
#include <owl/clipboar.h>
#include <owl/except.h>
TMetaFilePict::TMetaFilePict(HMETAFILE handle, TAutoDelete autoDelete)
:
TGdiBase(handle, autoDelete),
Extent(0,0)
{
Mm = MM_ANISOTROPIC;
}
TMetaFilePict::TMetaFilePict(const char* filename)
:
TGdiBase(::GetMetaFile(filename), AutoDelete),
Extent(0,0)
{
Mm = MM_ANISOTROPIC;
}
//
// Construct a TMetaFilePict that represents the metafilepict on the clipboard.
// Should be copied if metafile needs to be kept.
//
TMetaFilePict::TMetaFilePict(const TClipboard&)
:
Extent(0,0)
{
HGLOBAL hmfp = ::GetClipboardData(CF_METAFILEPICT);
METAFILEPICT far* mfp = (METAFILEPICT far*)::GlobalLock(hmfp);
if (mfp) {
Mm = mfp->mm;
Extent = TSize(mfp->xExt, mfp->yExt);
Handle = mfp->hMF;
::GlobalUnlock(hmfp);
}
else
Handle = 0;
ShouldDelete = false;
CheckValid();
}
#if defined(BI_PLAT_WIN32)
TMetaFilePict::TMetaFilePict(uint size, void* data)
:
TGdiBase(::SetMetaFileBitsEx(size, (LPBYTE)data), NoAutoDelete),
Extent(0,0)
{
CheckValid();
Mm = MM_ANISOTROPIC;
}
#else
TMetaFilePict::TMetaFilePict(HGLOBAL data)
:
TGdiBase(::SetMetaFileBitsBetter(data), NoAutoDelete),
Extent(0,0)
{
CheckValid();
Mm = MM_ANISOTROPIC;
}
#endif
TMetaFilePict::TMetaFilePict(const TMetaFilePict& src, const char far* fileName)
:
TGdiBase(::CopyMetaFile(src, fileName), AutoDelete),
Extent(src.Extent)
{
CheckValid();
Mm = src.Mm;
}
TMetaFilePict::~TMetaFilePict()
{
if (ShouldDelete && Handle)
::DeleteMetaFile(HMETAFILE(Handle));
}
#if defined(BI_PLAT_WIN32)
uint32
TMetaFilePict::GetMetaFileBitsEx(uint size, void* data)
{
return ::GetMetaFileBitsEx(HMETAFILE(Handle), size, (LPBYTE)data);
}
#endif
//
// Calculates target play size based on info from the metafilepict (if any)
// and default target size as necessary
//
TSize
TMetaFilePict::CalcPlaySize(TDC& dc, const TSize& defSize) const
{
// Given a fixed mapping mode, return precalculated extents
//
if (Mm != MM_ISOTROPIC && Mm != MM_ANISOTROPIC)
return Extent; // Assumes extents were calculated correctly.
// If no extent info given, then use defaults
//
if (!Extent.cx) {
return defSize;
}
// Use positive extents scaled to 0.01mm units
//
else if (Extent.cx > 0) {
return TSize(
int(long(Extent.cx)*dc.GetDeviceCaps(HORZRES)/dc.GetDeviceCaps(HORZSIZE)/100),
int(long(Extent.cy)*dc.GetDeviceCaps(VERTRES)/dc.GetDeviceCaps(VERTSIZE)/100)
);
}
// Use negative extents scaled to 0.01mm units w/ aspect ratio scaling
//
else {
long xscale = 100L * defSize.cx *
dc.GetDeviceCaps(HORZSIZE)/dc.GetDeviceCaps(HORZRES) / -Extent.cx;
long yscale = 100L * defSize.cy *
dc.GetDeviceCaps(VERTSIZE)/dc.GetDeviceCaps(VERTRES) / -Extent.cy;
long scale = min(xscale, yscale);
return TSize(
int(long(-Extent.cx)*scale*dc.GetDeviceCaps(HORZRES)/dc.GetDeviceCaps(HORZSIZE) / 100),
int(long(-Extent.cy)*scale*dc.GetDeviceCaps(VERTRES)/dc.GetDeviceCaps(VERTSIZE) / 100)
);
}
}
//
// Play this metafile onto a dc, possibly using a default size if this
// metafile doesn't have one. Does not save dc state.
//
bool
TMetaFilePict::PlayOnto(TDC& dc, const TSize& defSize) const
{
// Set target dc's mapping mode to this metafile's if there is one
//
if (Mm)
dc.SetMapMode(Mm);
// Set the viewport extent to the size that the metafile wil play to
//
if ((Mm == MM_ISOTROPIC || Mm == MM_ANISOTROPIC) && Extent.cx && Extent.cy)
dc.SetViewportExt(CalcPlaySize(dc, defSize));
return ::PlayMetaFile(dc, *this);
}
//
// Move this metafile to the clipboard inside of a metafilepict struct.
// Ownership of the metafilepict as well as the metafile is passed to the
// clipboard.
//
void
TMetaFilePict::ToClipboard(TClipboard& clipboard, unsigned mapMode,
const TSize& extent)
{
HGLOBAL hmfp = ::GlobalAlloc(GMEM_MOVEABLE, sizeof(METAFILEPICT));
if (!hmfp)
THROW( TXOutOfMemory() );
METAFILEPICT far* mfp = (METAFILEPICT far*)::GlobalLock(hmfp);
mfp->mm = mapMode;
mfp->xExt = extent.cx;
mfp->yExt = extent.cy;
mfp->hMF = (HMETAFILE)Handle;
::GlobalUnlock(hmfp);
clipboard.SetClipboardData(CF_METAFILEPICT, hmfp);
ShouldDelete = false;
}