Initial revision

1 files changed, 116 insertions, 0 deletions

diff --git a/mac/tkMacMDEF.c b/mac/tkMacMDEF.c
new file mode 100644
index 0000000..f7ce485
--- /dev/null
+++ b/mac/tkMacMDEF.c
@@ -0,0 +1,116 @@
+/*
+ * TkMacMDEF.c --
+ *
+ *	This module is implements the MDEF for tkMenus. The address of the
+ *	real entry proc will be blasted into the MDEF.
+ *
+ * Copyright (c) 1996 by Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkMacMDEF.c 1.5 97/07/11 %V%
+ */
+
+#define MAC_TCL
+#define NeedFunctionPrototypes 1
+#define NeedWidePrototypes 0
+
+#include <Menus.h>
+#include <LowMem.h>
+#include "tkMacInt.h"
+
+
+/*
+ * The following structure is built from assembly equates in MPW 3.0 
+ * AIncludes file: "Private.a." We're forced to update several locations not
+ * documented in "Inside Mac" to make our MDEF behave properly with hierarchical 
+ * menus.
+ */
+
+#if STRUCTALIGNMENTSUPPORTED
+#pragma options align=mac68k
+#endif
+typedef struct mbPrivate {
+    Byte unknown[6];
+    Rect mbItemRect; 		/* rect of currently chosen menu item */
+} mbPrivate;
+#if STRUCTALIGNMENTSUPPORTED
+#pragma options align=reset
+#endif
+
+/*
+ * We are forced to update a low-memory global to get cascades to work. This
+ * global does not have a LMEquate associated with it.
+ */
+
+#define SELECTRECT (*(Rect *)0x09fa) 	/* Menu select seems to need this */
+#define	MBSAVELOC (*(short *)0x0B5C) 	/* address of handle to mbarproc private data redefined below */
+
+pascal void		main _ANSI_ARGS_((short message,
+			    MenuHandle menu, Rect *menuRect,
+			    Point hitPt, short *whichItem));
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacStdMenu --
+ *
+ *	The dispatch routine called by the system to handle menu drawing,
+ *	scrolling, etc. This is a stub; the address of the real routine
+ *	is blasted in. The real routine will be a UniversalProcPtr,
+ *	which will give the real dispatch routine in Tk globals
+ *	and the like.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	This routine causes menus to be drawn and will certainly allocate
+ *	memory as a result. Also, the menu can scroll up and down, and
+ *	various other interface actions can take place
+ *
+ *----------------------------------------------------------------------
+ */
+
+pascal void
+main(
+    short message,		/* What action are we taking? */
+    MenuHandle menu,		/* The menu we are working with */
+    Rect *menuRect,		/* A pointer to the rect we are working with */
+    Point hitPt,		/* Where the mouse was hit for appropriate
+    				 * messages. */
+    short *whichItemPtr)	/* Output result. Which item was hit by
+    				 * the user? */
+{	
+    /*
+     * The constant 'MDEF' is what will be punched during menu intialization.
+     */
+
+    TkMenuDefProcPtr procPtr = (TkMenuDefProcPtr) 'MDEF';
+    TkMenuLowMemGlobals globals;
+    short oldItem;
+   
+    globals.menuDisable = LMGetMenuDisable();
+    globals.menuTop = LMGetTopMenuItem();
+    globals.menuBottom = LMGetAtMenuBottom();
+    if (MBSAVELOC == -1) {
+        globals.itemRect = (**(mbPrivate***)&MBSAVELOC)->mbItemRect;
+    }
+    if (message == mChooseMsg) {
+        oldItem = *whichItemPtr;
+    }
+    
+    TkCallMenuDefProc(procPtr, message, menu, menuRect, hitPt, whichItemPtr,
+    	    &globals);
+    
+    LMSetMenuDisable(globals.menuDisable);
+    LMSetTopMenuItem(globals.menuTop);
+    LMSetAtMenuBottom(globals.menuBottom);
+    if ((message == mChooseMsg) && (oldItem != *whichItemPtr) 
+    	    && (MBSAVELOC != -1)) {
+    	(**(mbPrivate***)&MBSAVELOC)->mbItemRect = globals.itemRect;
+      	SELECTRECT = globals.itemRect;
+    }
+}