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markom |
/*
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* TkMacMDEF.c --
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*
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* This module is implements the MDEF for tkMenus. The address of the
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* real entry proc will be blasted into the MDEF.
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*
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* Copyright (c) 1996 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkMacMDEF.c,v 1.1.1.1 2002-01-16 10:25:55 markom Exp $
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*/
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#define MAC_TCL
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#define NeedFunctionPrototypes 1
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#define NeedWidePrototypes 0
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#include <Menus.h>
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#include <LowMem.h>
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#include "tkMacInt.h"
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/*
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* The following structure is built from assembly equates in MPW 3.0
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* AIncludes file: "Private.a." We're forced to update several locations not
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* documented in "Inside Mac" to make our MDEF behave properly with hierarchical
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* menus.
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*/
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#if STRUCTALIGNMENTSUPPORTED
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#pragma options align=mac68k
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#endif
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typedef struct mbPrivate {
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Byte unknown[6];
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Rect mbItemRect; /* rect of currently chosen menu item */
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} mbPrivate;
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#if STRUCTALIGNMENTSUPPORTED
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#pragma options align=reset
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#endif
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/*
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* We are forced to update a low-memory global to get cascades to work. This
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* global does not have a LMEquate associated with it.
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*/
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#define SELECTRECT (*(Rect *)0x09fa) /* Menu select seems to need this */
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#define MBSAVELOC (*(short *)0x0B5C) /* address of handle to mbarproc private data redefined below */
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pascal void main _ANSI_ARGS_((short message,
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MenuHandle menu, Rect *menuRect,
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Point hitPt, short *whichItem));
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/*
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*----------------------------------------------------------------------
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*
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* TkMacStdMenu --
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*
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* The dispatch routine called by the system to handle menu drawing,
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* scrolling, etc. This is a stub; the address of the real routine
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* is blasted in. The real routine will be a UniversalProcPtr,
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* which will give the real dispatch routine in Tk globals
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* and the like.
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*
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* Results:
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* None.
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*
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* Side effects:
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* This routine causes menus to be drawn and will certainly allocate
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* memory as a result. Also, the menu can scroll up and down, and
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* various other interface actions can take place
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*
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*----------------------------------------------------------------------
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*/
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pascal void
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main(
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short message, /* What action are we taking? */
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MenuHandle menu, /* The menu we are working with */
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Rect *menuRect, /* A pointer to the rect we are working with */
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Point hitPt, /* Where the mouse was hit for appropriate
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* messages. */
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short *whichItemPtr) /* Output result. Which item was hit by
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* the user? */
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{
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/*
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* The constant 'MDEF' is what will be punched during menu intialization.
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*/
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TkMenuDefProcPtr procPtr = (TkMenuDefProcPtr) 'MDEF';
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TkMenuLowMemGlobals globals;
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short oldItem;
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globals.menuDisable = LMGetMenuDisable();
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globals.menuTop = LMGetTopMenuItem();
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globals.menuBottom = LMGetAtMenuBottom();
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if (MBSAVELOC == -1) {
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globals.itemRect = (**(mbPrivate***)&MBSAVELOC)->mbItemRect;
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}
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if (message == mChooseMsg) {
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oldItem = *whichItemPtr;
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}
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TkCallMenuDefProc(procPtr, message, menu, menuRect, hitPt, whichItemPtr,
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&globals);
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LMSetMenuDisable(globals.menuDisable);
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LMSetTopMenuItem(globals.menuTop);
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LMSetAtMenuBottom(globals.menuBottom);
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if ((message == mChooseMsg) && (oldItem != *whichItemPtr)
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&& (MBSAVELOC != -1)) {
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(**(mbPrivate***)&MBSAVELOC)->mbItemRect = globals.itemRect;
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SELECTRECT = globals.itemRect;
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}
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}
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