Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ames!mailrus!cornell!uw-beaver!teknowledge-vaxc!jbrouill
From: jbrouill@teknowledge-vaxc.ARPA (Luc Brouillet)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: help with PopUpMenu?  Also LSC 3.0
Summary: use mouseDown
Message-ID: <24757@teknowledge-vaxc.ARPA>
Date: 2 Sep 88 22:05:11 GMT
References: <21146@tut.cis.ohio-state.edu>
Reply-To: jbrouill@teknowledge-vaxc.UUCP (Jean-Luc Brouillet)
Organization: Teknowledge, Inc., Palo Alto CA
Lines: 69

In article <21146@tut.cis.ohio-state.edu> cml@diplodocus.cis.ohio-state.edu (Christopher Lott) writes:
>can anyone please help me with the syntax for calling a popup from
>a script?  I have the PopUpXcmd in my stack, but all attempts at calling
>it just return a '0' (zero).

I use the PopUp XCMD defined in  Gary Bond's "XCMD's for Hypercard".
I was also experiencing the same problem.   The error was using the
mouseUp message.  The PopUpMenuSelect() routine expect the mouse to be down
when called.  Here is my working code:

Script for the lock field that contains the selection:

    on mouseDown
      popChoice("item1,(-,item2,item 3,item 4,item 5,item 6,item 7,item 8")
    end mouseDown

Script for the stack:

    on popChoice l
      repeat with n = 1 to the number of items of l
        put item n of l & ";" after m
      end repeat
  
      put rect of the target into r
      put PopMenu(item 2 of r, item 1 of r, m) into v
      put item v of l into the target
    end popChoice


There seems to be a typo at the bottom of p. 261 of Bond's book.
It should read:

    selection = (long) PopUpMenuSelect (myMenuHandle, 
	  (offsetTop + cardWindowLoc.v), (offsetLeft + cardWindowLoc.h), 1);


Finally, I found the following handy for writing Bond's XCMDs in LSC 3.0:

    pascal	void main (XCmdBlockPtr);
    void	doXCmd (XCmdBlockPtr);

    pascal void  main (paramPtr)
	XCmdBlockPtr paramPtr;
    {
        asm { MOVE.L    A4,-(SP)    ; save the old A4
	      MOVE.L    A0,A4	    ;load the address of the code segment
				    ; in memory
            }

        doXCmd (paramPtr);

        asm { MOVEA.L (SP)+,A4	; restore A4
	    }
    }


    void  doXCmd (paramPtr)
	XCmdBlockPtr paramPtr;
    {
    /* what would normally be in the main() routine.
    }


Have fun!

Jean-Luc

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