🚀 go-pugleaf

In article <22139@usc.edu| papa@pollux.usc.edu (Marco Papa) writes:
|I've been trying to copying metafiles to "disk files" with no problem,
|while I had no success with copying a metafile to the Clipboard.  The
|clipboard recognizes that it received a Picture, but nothing is shown.
|The following is the sample code I use, mainly taken verbatim from
|Charles Petzold book "Programming Windows". When SaveClip is false,
|the etafile is correctly saved on a disk file.  When SaveClip is
|true an "empty" picture shows up in the clipboard. Any ideas?

Gee, I should have waited a couple of hours, since I just got it running.
The Clipboard seems to want a "copy" of the metafile, generated with
CopyMetafile(.., NULL).  The following is the edited code that works for 
the clipboard, too.

|void SetBarMetafile(HWND hWnd)
|{
|	HDC hMetaDC;
|	HANDLE hMF;
|    	HANDLE hDiskMF;
|    	GLOBALHANDLE hGMem;
|	LPMETAFILEPICT lpMFP;

***	HANDLE hClipMF;

|
|	if (SaveClip) {
|		hMetaDC = CreateMetaFile(NULL);
|	} else {
|		hMetaDC = CreateMetaFile(szMetaFileName);
|	}
|	SetWindowExt(hMetaDC, 1024, 780);
|
|	<<< do the GDI graphics using hMetaDC >>>
|
|    	hMF = CloseMetaFile(hMetaDC);
|	/* copy memory metafile to disk metafile or Clipboard */
|	if (hMF) {
|		if (SaveClip) {

***			hClipMF = CopyMetaFile(hMF, NULL);

|			hGMem = GlobalAlloc(GHND,(DWORD)sizeof(METAFILEPICT));
|			lpMFP = (LPMETAFILEPICT) GlobalLock(hGMem);
|
|			lpMFP->mm = MM_ANISOTROPIC;
|			lpMFP->xExt = 0;
|			lpMFP->yExt = 0;
|
|**			lpMFP->hMF = hMF;  (old)

***			lpMFP->hMF = hClipMF;  (new);

|			GlobalUnlock(hGMem);
|
|			OpenClipboard(hWnd);
|			EmptyClipboard();
|			SetClipboardData(CF_METAFILEPICT, hGMem);
|			CloseClipboard();
|		} 
|		DeleteMetaFile(hMF);
|	} else
|		MessageBox(hWnd, "Error creating Picture", szAppName,
|			MB_OK | MB_ICONHAND);
|    }
|}

Enjoy.

-- Marco Papa 'Doc'
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"Xerox sues somebody for copying?" -- David Letterman
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