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- Apple II
- Technical Notes
- _____________________________________________________________________________
- Developer Technical Support
-
- Apple IIgs
- #24: Apple IIgs Toolbox Reference Updates
-
- Revised by: Dave Lyons, C.K. Haun, Eric Soldan September 1990
- & Matt Deatherage
- Written by: Rilla Reynolds October 1987
-
- This Technical Note documents changes to the Apple IIgs Toolbox Reference
- manuals. Please contact Apple II Developer Technical Support at the address
- listed in Apple II Technical Note #0 if you have additional corrections or
- suggestions for any of the Apple IIgs Toolbox documentation.
- Changes since July 1990: Added information on FixAppleMenu, GetMItem,
- ReadAsciiTime, and NewWindow2.
- _____________________________________________________________________________
-
- The current Apple IIgs Toolbox reference material is Apple IIgs Toolbox
- Reference, volumes 1 to 3 as well as this Technical Note. (The Apple IIgs
- Toolbox Reference Update beta draft from APDA is obsolete and should not be
- used.)
-
-
- Corrections to Volume 1
-
- FixAppleMenu Can Die With Error $0512
-
- Fatal system error $0512 comes from FixAppleMenu (in the Desk Manager). It
- means that one of your installed New Desk Accessories does not have a well-
- formed menu title string. In particular, the required backslash (\) character
- was not found (make sure bit seven is off).
-
- The List Manager Wants the Port Set Properly
-
- The List Manager expects the current grafPort to be set properly before you
- make most List Manager calls; drawing can occur in funny places if the
- grafPort is not set properly before calls that draw (like SelectMember2).
- Most List Manager calls, and many other toolbox calls, require that the
- current grafPort be explicitly set. Before you call List Manager routines
- that draw, set the current port to your window with a SetPort call. Remember
- the note in Volume 2 under the NewWindow call--"Important: NewWindow does not
- set the current port, but many routines require that a current port exist.
- Use the QuickDraw II routine SetPort to set the current port." Using SetPort
- can prevent toolbox confusion and reduce your debugging time.
-
- Error $0F02 from GetMItemName
-
- GetMItemName returns error $0F02 if the specified menu item is not found.
-
- ReadAsciiTime Result Buffer
-
- The description of ReadAsciiTime (in the Miscellaneous tools) on page 14-16
- should say the most significant bit (not byte) of each character is set to
- one.
-
- Corrections to Volume 2
-
- QuickDraw Auxiliary Error Codes
-
- Following are some error codes from QuickDraw Auxiliary that are not listed in
- volume 2.
-
- $1210: picEmpty
- $1211: picAlreadyOpen
- $1212: pictureError
-
- $1221: badRect
- $1222: badMode
-
- FrameRgn Does Not Contribute to an Open Region
-
- The description of the FrameRgn routine on page 16-106 in the Apple IIgs
- Toolbox Reference, Volume 2 states that FrameRgn will contribute to a region
- definition if a region is open when FrameRgn is called. This is incorrect;
- FrameRgn does not contribute to the region being defined. To add a region to
- another region, use XorRgn or UnionRgn.
-
- Window Manager, "Draw Information Bar Routine"
-
- On page 25-23, the code to clean up the stack is incorrect. On the sta <14,
- the comment "Works because stack and direct page are equal" is no longer true--
- they were equal until the PLY two lines earlier. One way to correct the code
- is to replace sta <14 with sta 14,s and sta <12 with sta 12,s.
-
-
- Corrections to Volume 3
-
- Errors from AddToRunQ and RemoveFromRunQ
-
- The Desk Manager chapter, page 29-6, states no errors are possible for
- AddToRunQ, but any errors from the Miscellaneous Tools routine AddToQueue are
- returned unchanged.
-
- Page 29-8 states no errors are possible from RemoveFromRunQ, but any errors
- from DeleteFromQueue are returned unchanged.
-
- NewWindow2 Parameters Override Template Even When You Pass NIL
-
- The description of the NewWindow2 call on page 52-32 is in error. The
- description of the titlePtr, refCon, contentDrawPtr, and defProcPtr says, "To
- prevent NewWindow2 from replacing the template values, supply NIL pointers..."
- This is only true for the titlePtr parameter--if you pass NIL for any of the
- other parameters then the value of that parameter in your window record is
- also NIL, no matter what the template value was. In other words, if you have
- the value $99 stored in your template refCon field, and you pass NIL for the
- refCon value in a NewWindow2 call, the value of the refCon in the returned
- grafPortPtr is NIL.
-
-
- Further Reference:
- _____________________________________________________________________________
- o Apple IIgs Toolbox Reference, Volumes 1-3
-
-