TweetFollow Us on Twitter

Autumn 91 - A2 Q&A

APPLE II Q & A

APPLE II DEVELOPER TECHNICAL SUPPORT

Q How can I "dim" text in my Apple II GS application, similar to the way the Toolbox dims menu titles and menu options, and the way that HiliteControl dims a button name?

A Dimming text is a piece of cake. Here's how the Apple II GS Menu Manager does it in both 640 and 320 mode. The same thing works great for both.

  1. Calculate the bounding box of the text.
  2. Fill it with the proper background color for the operation in question.
  3. Draw the text.
  4. Execute code that looks something like this:

    pea dimmed>>16
    pea dimmed
    _SetPenMask         ;Set the pen mask to "dimmed" mask
    pea textRect>>16
    pea textRect        ;Push pointer to text boundary rect
    lda backColor       ;Get text's background color
    and #$00FF          ;Always solid

; Here you need to do something in your code to get the 
; appropriate pattern for the text you're drawing. This will be 
; one of the 16 patterns in the 512-byte table, starting with 16 
; bytes of $00, 16 bytes of $11, and ending with 16 bytes of $FF.
; We leave the routine GetColorPtr for you to code, but our 
; example assumes it returns the pointer we need in A (low word) 
; and X (high word).

    jsr GetColorPtr         ;(see above)
    phx                     ;high word
    pha                     ;low word
    _FillRect               ;Fill will be dithered
    pea nor_mask>>16  ;Reset drawing mask to normal solid
    pea nor_mask
    _SetPenMask
    rts

textRect    DC.B $00,00,00,00   ;Put your rectangle here
backColor   DC.W $0000          ;Background color of text to dim

dimmed      DC.B $55,$AA,$55,$AA,$55,$AA,$55,$AA
nor_mask    DC.B $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF

Yes, it's really this easy!

Q When I call FixFontMenu from my Apple II GS new desk accessory (NDA), everything works fine, but if the current application has a font menu it stops working. What's wrong?

A FixFontMenu keeps only one correspondence between menu item IDs and font family numbers--if you call FixFontMenu from an NDA, you blow away the already existing correspondence that the application was using, maintained within the Font Manager. ItemID2FamNum then works only on item IDs corresponding to your NDA's font menu, and these usually are unrelated to the values the application passes from its font menu. Worse, FamNum2ItemID will subsequently return menu item IDs for font family numbers that have nothing to do with the application's menus; depending on how the application operates on the resulting item ID, this could be disastrous.

Fortunately, doing this yourself is fairly easy with the Font Manager's help. CountFamilies tells you how many font families there are, and FindFamily returns the name of each of them. You can manipulate this information into a font menu in a fairly straightforward way, using standard Menu Manager calls. While you're at it, you can also use FindFontStats to figure out what point sizes and styles are available for each font family, so you can indicate this in your Size and Style menus. You could even use the information to build your own font-choosing dialog, much as HyperCard IIGS does. Remember that your NDA should run in either 320 or 640 mode, so don't make the dialog box too wide.

Q When using an Apple II GS run queue item, can I use the second reserved field to find out when the item was last executed? I assume this value is the tickCount. Currently, I just get the current tickCount and subtract the last tickCount. Using this field could save me one tool call, and when doing animation via a RunQ, every extra tick counts.

A No, you should not use undocumented fields in the run queue header because they could change with future software releases. However, there is a fast way to get the current tick count. Pass refNum $0005 to the GetAddr function in the Miscellaneous Tools once each time your program runs, and it tells you the location of the tick counter. Since the tick count changes during heartbeat interrupts, be sure to disable interrupts around your direct accesses to the tick counter (PHP, SEI, access tick count, PLP).

If your application makes certain tool calls frequently, it may be worthwhile to short-circuit the tool dispatcher and transfer control to the Toolbox function directly (if the tool takes a long time to execute anyway, it isn't worth it). You can get a function's address and work area pointer by calling GetFuncPtr and GetWAP in the Tool Locator. When the function gets control, the Y and A registers must contain the tool set's work area pointer, the X register must contain the function number, and there must be two RTL addresses on the stack.

Q Does the Apple IIe Card for the Macintosh LC have a technical reference manual?

A There's no separate technical reference manual. Use the Apple IIe Technical Reference (Addison- Wesley), together with Apple IIe Technical Note #10, "The Apple IIe Card for the Macintosh LC."

Q What's the proper method of saving the Apple II GS Super Hi-Res (SHR) screens? If my application both uses shadowing and is fast-port aware, the restored screen colors are garbaged. Can I simply use HandToPtr with ptr representing the screen addresses, or will this mess up the scan-line control byte (SCB) restoration since these are read-modify-write locations?

A The shadowed screen's SCBs may not be correct, so by saving and restoring them you're causing random data to be restored into the standard SCBs. Your best bet, if shadowing is on, is to turn shadowing off, restore the bank $01 screen, including its SCBs and color tables, turn shadowing on, and restore the $E1 screen and contents. If you don't want to double-restore the $E1 screen and $01 screen, you should turn shadowing off, restore the bank $01 color tables/SCBs, turn shadowing on, and restore the $01 screen. But, since these screens are never guaranteed to be the same when you save, you should always restore both screens separately.

QuickDraw never touches the shadowed screen SCBs, so if the fastPort flag is set you can ignore the restoring of the bank $01 SCBs/color tables, since the application promised not to interfere with them. But since this won't save very much time, you probably shouldn't worry about it.

Q I am using an Apple II GS utility to generate resources for my application, and I noticed that some of the resource IDs generated are in the range $07FF0000 to $07FFFFFF, which is reserved for the system software's use. What's happening?

A Your utility is calling UniqueResourceID with an IDRange of $FFFF, to request any unused resource ID. A bug in system software version 5.0.x allows UniqueResourceID to accidentally return a system-range resource ID if any system-range resources of that type are already present. This will be fixed in System 6. In the meantime, utilities can use UniqueResourceID with IDRange values other than $FFFF, and you should watch your resource IDs carefully to avoid using system-range resource IDs.


Kudos to our readers who care enough to ask us terrific and well thought-out questions. The answers are supplied by our teams of technical gurus; our thanks to all. Special thanks to Matt Deatherage, Jim Luther, Dave Lyons, Jim Mensch, and Eric Soldan for the material in this Q & A column. *

Have more questions? Need more answers? Take a look at the Dev Tech Answers library on AppleLink (updated weekly) or at the Q & A stack on the Developer CD Series disc.*

 
AAPL
$102.99
Apple Inc.
+0.52
MSFT
$44.38
Microsoft Corpora
-0.50
GOOG
$532.71
Google Inc.
+6.17

MacTech Search:
Community Search:

Software Updates via MacUpdate

OmniOutliner 4.1.3 - Organize your ideas...
OmniOutliner is a flexible program for creating, collecting, and organizing information. Give your creativity a kick start by using an application that's actually designed to help you think. It's... Read more
BBEdit 11.0 - Powerful text and HTML edi...
BBEdit is the leading professional HTML and text editor for the Mac. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a... Read more
Apple Security Update 2014-005 - For OS...
Apple Security Update is recommended for all users and improves the security of Mac OS X. For information on the security content of this update, please visit this website: http://support.apple.com/... Read more
EyeTV 3.6.6 - Watch and record TV on you...
EyeTV brings a rich TV experience to your Mac. Watch live TV on your Mac. Pause, rewind, and record whenever you want. EyeTV gives you powerful control over what you watch and how you watch it. Put... Read more
RapidWeaver 6.0 - Create template-based...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
NTFS 12.0.39 - Provides full read and wr...
Paragon NTFS breaks down the barriers between Windows and OS X. Paragon NTFS effectively solves the communication problems between the Mac system and NTFS, providing full read and write access to... Read more
RestoreMeNot 2.0.3 - Disable window rest...
RestoreMeNot provides a simple way to disable the window restoration for individual applications so that you can fine-tune this behavior to suit your needs. Please note that RestoreMeNot is designed... Read more
Command-C 1.1.5 - Clipboard sharing tool...
Command-C is a revolutionary app which makes easy to share your clipboard between iOS and OS X using your local WiFi network, even if the app is not currently opened. Copy anything (text, pictures,... Read more
Macgo Blu-ray Player 2.10.9.1750 - Blu-r...
Macgo Mac Blu-ray Player can bring you the most unforgettable Blu-ray experience on your Mac. Overview Macgo Mac Blu-ray Player can satisfy just about every need you could possibly have in a Blu-ray... Read more
Apple iOS 8.1 - The latest version of Ap...
The latest version of iOS can be downloaded through iTunes. Apple iOS 8 comes with big updates to apps you use every day, like Messages and Photos. A whole new way to share content with your family.... Read more

Latest Forum Discussions

See All

TinType by Hipstamatic (Photography)
TinType by Hipstamatic 1.0 Device: iOS iPhone Category: Photography Price: $.99, Version: 1.0 (iTunes) Description: Create hauntingly beautiful, soul capturing portraits with TinType by Hipstamatic. Inspired by daguerreotypes,... | Read more »
The Latest Update for Heroes of Dragon A...
The Latest Update for Heroes of Dragon Age Introduces Daily PvE Challenges Posted by Ellis Spice on October 22nd, 2014 [ permalink ] | Read more »
A New Trailer has Been Revealed for Epic...
A New Trailer has Been Revealed for Epic of Kings Posted by Jessica Fisher on October 22nd, 2014 [ permalink ] Dead Mage Inc. has released a new, action-packed trailer for the upcoming Epic of Kings. | Read more »
Find the Line Review
Find the Line Review By Campbell Bird on October 22nd, 2014 Our Rating: :: INSLIDE THE LINESUniversal App - Designed for iPhone and iPad Tease out beautiful line drawings in this unique, free-to-play puzzle game.   | Read more »
The Silent Age Episode 2 Review
The Silent Age Episode 2 Review By Jennifer Allen on October 22nd, 2014 Our Rating: :: ROUNDING THINGS OFF NICELYUniversal App - Designed for iPhone and iPad Rounding off a great point and click adventure comes The Silent Age... | Read more »
Craft Your Own Mini-Games with Papercade
Craft Your Own Mini-Games with Papercade Posted by Jessica Fisher on October 22nd, 2014 [ permalink ] iPad Only App - Designed for the iPad Scrapbookers move over, Scrapgaming is the new thing. | Read more »
Reshape Review
Reshape Review By Jennifer Allen on October 22nd, 2014 Our Rating: :: SIMPLE SHAPESUniversal App - Designed for iPhone and iPad Match triangles together to form cubes in this fast-paced and twitchy game.   | Read more »
Miika (Games)
Miika 1.0.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0.0 (iTunes) Description: Miika is a beautiful 3D puzzle game based on camera perspectives combined with the use of optical illusions. Miika challenges... | Read more »
Infuse Pro (Photography)
Infuse Pro 3.0 Device: iOS Universal Category: Photography Price: $9.99, Version: 3.0 (iTunes) Description: ** All-new version 3 includes fully licensed and certified DTS® and DTS-HD® audio! ** | Read more »
Swap Heroes (Games)
Swap Heroes 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: **Half price for a limited time only** Swap Heroes is a casual turn-based strategy adventure. Form a group of heroes and guide them... | Read more »

Price Scanner via MacPrices.net

Save with Best Buy’s College Student Deals
Take an additional $50 off all MacBooks and iMacs at Best Buy Online with their College Students Deals Savings, valid through November 1st. Anyone with a valid .EDU email address can take advantage... Read more
iPad Air 2 & iPad mini 3 Best Tablets Yet...
The new iPads turned out to be pretty much everything I’d been hoping for and more than I’d expected.”More” particularly in terms of a drinking-from-a-firehose choice of models and configurations,... Read more
Drafts 4 Reinvents iOS Productivity App
N Richland Hills, Texas based Agile Tortoise has announced the release of Drafts 4 for iPhone and iPad. Drafts is a quick capture note taking app with flexible output actions. Drafts 4 scales from... Read more
AT&T accepting preorders for new iPads fo...
AT&T Wireless is accepting preorders for the new iPad Air 2 and iPad mini 3, cellular models, for $100 off MSRP with a 2-year service agreement: - 16GB iPad Air 2 WiFi + Cellular: $529.99 - 64GB... Read more
Apple offering refurbished Mac Pros for up to...
The Apple Store is offering Apple Certified Refurbished 2013 Mac Pros for up to $600 off the cost of new models. An Apple one-year warranty is included with each Mac Pro, and shipping is free. The... Read more
Select MacBook Airs $100 off MSRP, free shipp...
B&H Photo has 2014 a couple of MacBook Airs on sale for $100 off MSRP. Shipping is free, and B&H charges NY sales tax only. They also include free copies of Parallels Desktop and LoJack for... Read more
13-inch 2.5GHz MacBook Pro on sale for $100 o...
B&H Photo has the 13″ 2.5GHz MacBook Pro on sale for $999.99 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Read more
Strong iPhone, Mac And App Store Sales Drive...
Apple on Monday announced financial results for its fiscal 2014 fourth quarter ended September 27, 2014. The Company posted quarterly revenue of $42.1 billion and quarterly net profit of $8.5 billion... Read more
Apple Posts How-To For OS X Recovery
OS X 10.7 Lion and later include OS X Recovery. This feature includes all of the tools you need to reinstall OS X, repair your disk, and even restore from a Time Machine backup. OS X Recovery... Read more
Mac OS X Versions (Builds) Supported By Vario...
Apple Support has posted a handy resource explaining which Mac OS X versions (builds) originally shipped with or are available for your computer via retail discs, downloads, or Software Update. Apple... Read more

Jobs Board

Senior Event Manager, *Apple* Retail Market...
…This senior level position is responsible for leading and imagining the Apple Retail Team's global event strategy. Delivering an overarching brand story; in-store, Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Project Manager / Business Analyst, WW *Appl...
…a senior project manager / business analyst to work within our Worldwide Apple Fulfillment Operations and the Business Process Re-engineering team. This role will work Read more
*Apple* Retail - Multiple Positions (US) - A...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Position Opening at *Apple* - Apple (United...
…customers purchase our products, you're the one who helps them get more out of their new Apple technology. Your day in the Apple Store is filled with a range of Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.