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From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How to highlight buttons
Message-ID: <10560@hoptoad.uucp>
Date: 3 Mar 90 23:51:43 GMT
References: <288@bii.UUCP>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 62

In article <288@bii.UUCP> jsl@bii.UUCP (jsl) writes:
>I have been trying to figure out how to highlight the default
>buttons in a dialog.  However I have been unsuccessful.
>
>    GetDItem (AcquDLOG, iAcquOK, &ItemType, &ItemHandle, &ItemRect);
>    PenSize (3,3);
>    InsetRect(&ItemRect, -4, -4);
>    OffsetRect(&ItemRect, 50, 50);
>    FrameRoundRect(&ItemRect, 16, 16);

What's the OffsetRect for?  That is moving your rectangle 50 pixels down and
to the right of where you want it to be.  If the OK button is near the
bottom of the dialog, then you are probably drawing the round rectangle
outside the window.

I do something messy, but convenient, to outline default buttons.
Every dialog has an external dialog information resource that tries to
describe the dialog's behavior non-procedurally as much as possible.
One of the fields is an outline item id.  When I see this on creating a
dialog, I add a new user item to the dialog item list in memory, and
bind a drawing procedure to it.  It goes like this:


typedef struct {
	ProcPtr p;
	Rect r;
	char type;
	char length;
} AUserItem;

	
	if ((*extra)->defButton) {
		AUserItem user;		/* add outline user item */
		GetIRect(dialog, (*extra)->defButton, &user.r);
		InsetRect(&user.r, -4, -4);
		user.p = (ProcPtr)DrawRoundRect;
		user.type = userItem | itemDisable;
		user.length = 0;
		PtrAndHand((Ptr)&user, ((DialogPeek)dialog)->items,
				sizeof(AUserItem));
		(**(short **)(((DialogPeek)dialog)->items))++;
	}


pascal void DrawRoundRect(DialogPtr dialog, short item)
{	Rect r; PenState state;
	GetPenState(&state); PenSize(3, 3);
	GetIRect(dialog, item, &r);
	FrameRoundRect(&r, 16, 16);
	SetPenState(&state);
}

void GetIRect(DialogPtr dialog, short item, Rect *r)
{	short type; Handle h;
	GetDItem(dialog, item, &type, &h, r);
}
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

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