using CDC::DrawState()

Serge Lalonde -- serge@infolytica.qc.ca
Thursday, October 24, 1996

Environment: VC++ 4.2, NT 4.0

Hi there!

Has anyone ever successfully used the CDC::DrawState() method to draw
a disabled and embossed bitmap? The documentation seems clear and simple
enough, but when I use it like so

   pDC->DrawState(rect.TopLeft(), rect.Size(), &bitmap, DSS_DISABLED);

all I get is a dark grey in the rectangle that is specified. I thought
that this is what the toolbars use to draw their buttons when disabled
(which is what I really want).

It sortof works if my bitmap is in black and white only, but that wouldn't
be very useful, and besides the documentation makes no mention of this
limitation.

Any suggestions on how to use it properly or alternatively, how can I draw
a CBitmap to look greyed and embossed like toolbar buttons?

Thanks.
--
Have a tremendous day!
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Randy Taylor -- randy_taylor@ebt.com
Sunday, October 27, 1996

[Mini-digest: 2 responses]

> Has anyone ever successfully used the CDC::DrawState() method to draw
> a disabled and embossed bitmap?

yes, my code looks like this:

		if (GetListCtrl().GetItemState(lvitem.iItem, LVIS_CUT) & LVIS_CUT &&
afxData.bWin4) {
			// PAINT CUT ITEM ICON (WIN4 ONLY)
			HICON hIcon = imageList_small.ExtractIcon( lvitem.iImage );
			VERIFY(::DrawState(
				cdc.GetSafeHdc(),	// handle to device context
				NULL,	// handle to brush
				NULL,	// pointer to callback function
				MAKELPARAM (hIcon, 0),	// image information
				NULL,	// more image information
				pt.x,	// horizontal location of image
				pt.y,	// vertical location of image
				WIDTH_OF_ITEM_ICON,	// width of image
				WIDTH_OF_ITEM_ICON,	// height of image
				DST_ICON | DSS_DISABLED));	// image type and state
		} else {
			VERIFY (imageList_small.Draw 
				(&cdc, lvitem.iImage, pt, ILD_TRANSPARENT));
		}



> The documentation seems clear and simple
> enough, but when I use it like so
> 
>    pDC->DrawState(rect.TopLeft(), rect.Size(), &bitmap, DSS_DISABLED);
> 
> all I get is a dark grey in the rectangle that is specified. I thought
> that this is what the toolbars use to draw their buttons when disabled
> (which is what I really want).

I think it is.

> It sortof works if my bitmap is in black and white only, but that
wouldn't
> be very useful, and besides the documentation makes no mention of this
> limitation.

Try using the WIN32 version, like my code did... just for fun.

 
> Any suggestions on how to use it properly or alternatively, how can I
draw
> a CBitmap to look greyed and embossed like toolbar buttons?

-----From: Jim Barry 

I've never used this function myself, but it looks to me like you forgot   
to specify the DST_BITMAP flag.

Cheers,

 - Jim  

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