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145 lines
4.1 KiB
Plaintext
145 lines
4.1 KiB
Plaintext
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; File: PopupCDEFMDEF.a
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;
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; Contains: code resource that postprocesses menu defproc's mSizeMsg
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; by expanding the width by a given delta amount
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;
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; Written by: Byron Han
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;
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; Copyright: © 1989-1990, 1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <5> 11/3/92 DTY Clean up includes.
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; <4> 3/30/91 DTY ngk, #f1-ngk-002: lock down MDEF before calling through to it.
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; <3> 3/19/90 EMT Deleted spurious characters inserted in <2>.
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; <2> 3/19/90 BBH moved dsMDEFNotFound to SysErr.a
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; <1> 3/5/90 BBH first checked in to BBS
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;
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; Pre-BBS Modification History
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; 12/2/89 BBH Swap version/procID
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; Incorporate changes from code revu
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; (tighten up code, add syserr if cannot load mdef)
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; 11/28/89 BBH Created
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;
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;
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; PROCEDURE MyMDEF(msg: INTEGER; hMenu: MenuHandle;
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; VAR mRect: Rect; hitPt: Point; VAR mItem: INTEGER);
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;
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; This MDEF calls the mdef stored in the header. If the size message is
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; passed in, we increase the width by the value in extend.
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;
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; So, to do this from pascal…
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;
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; TYPE
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; MyHandle = ^MyPtr;
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; MyPtr = ^MyRecord;
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; MyRecord = RECORD { format of the header }
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; branch: INTEGER; { BRA.S blah blah blah }
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; flags: INTEGER;
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; rType: ResType;
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; procID: INTEGER;
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; version: INTEGER;
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;
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; defProc: Handle;
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; extend: INTEGER;
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; END;
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;
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; theHandle := MyHandle(GetResource('MDEF', $DFE0)); { get new mdef }
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; WITH theHandle^^ DO { and fill in the blanks }
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; BEGIN
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; defProc := theMenu^^.menuProc;
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; extend := info.widMax
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; END;
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;
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; theMenu^^.menuProc := Handle(theHandle); { set up new mdefproc }
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;
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; { call popupmenuselect here }
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;
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; theMenu^^.menuProc := theHandle^.defProc; { restore the mdefproc }
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;
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wholeErrors EQU 1 ; <BBH 12/2/89> we want ALL error codes
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INCLUDE 'SysErr.a' ; <BBH 12/2/89>
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INCLUDE 'ToolEqu.a'
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INCLUDE 'Traps.a'
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MDEF PROC EXPORT
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retAddr EQU 4 ; stack frame constants
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mItem EQU retAddr+4
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hitPt EQU mItem+4
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mRect EQU hitPt+4
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hMenu EQU mRect+4
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msg EQU hMenu+4
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branch BRA.S Main ; 2 bytes
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flags DC.W 0 ; flags
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rType DC.L ('MDEF')
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procID DC.W $DFE0 ; procID (owned by CDEF 63)
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version DC.W 0 ; version
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defproc DC.L 0 ; handle for the menu defproc
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extend DC.W 0 ; amount to increase horizontal by
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Main LINK A6,#-2 ; create a stack frame
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MOVE.W msg(A6),-(SP) ; repush the parameters
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MOVE.L hMenu(A6),-(SP)
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MOVE.L mRect(A6),-(SP)
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MOVE.L hitPt(A6),-(SP)
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MOVE.L mItem(A6),-(SP)
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MOVE.L defProc,A0 ; replaces two lines below <BBH 12/2/89>
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; LEA defproc,A0 ; get the defProc storage
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; MOVE.L (A0),A0 ; get the defproc
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MOVE.L A0,-(SP) ; load mdefproc <BBH 12/2/89>
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_LoadResource
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MOVE.L (A0),D1 ; check if still not loaded <BBH 12/2/89> <4, #f1-ngk-002>
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BNE.S @AOK ; all right
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MOVEQ #dsMDEFNotFound,D0 ; deep shit alert error
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_SysError
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BRA.S @byebye ; and now back to the future…
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@AOK ; end addition <BBH 12/2/89>
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_HGetState ; Get state of MDEF <4, #f1-ngk-002>
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move.w d0,-2(a6) ; Save state <4, #f1-ngk-002>
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_HLock ; <4, #f1-ngk-002>
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MOVE.L D1,A0 ; dereference defproc <4, #f1-ngk-002>
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JSR (A0) ; jump through it please
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move.l defProc,a0 ; <4, #f1-ngk-002>
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move.w -2(a6),d0 ; Restore state of handle <4, #fl-ngk-002>
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_HSetState ; <4, #f1-ngk-002>
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CMP.W #mSizeMsg,msg(A6) ; replaces two lines below <BBH 12/2/89>
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; MOVE.W msg(A6),D0 ; is this a size measurement?
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; CMP #mSizeMsg,D0
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BNE.S @byebye
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MOVE.W extend,D0 ; replaces two lines below <BBH 12/2/89>
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; LEA extend,A0 ; get amount to widen the menu
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; MOVE.W (A0),D0
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MOVE.L hMenu(A6),A0 ; get the mHandle
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MOVE.L (A0),A0 ; dereference
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ADD.W D0,menuWidth(A0) ; and add amount to extend by…
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@byebye ; common exit code
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UNLK A6 ; destroy stack frame
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MOVE.L (SP)+,A0 ; get return address
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LEA 18(SP),SP ; replaces line below <BBH 12/2/89>
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; ADD.L #18,SP ; strip
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JMP (A0) ; and go home
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ENDPROC
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END
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