TweetFollow Us on Twitter

Aug 92 Tips
Volume Number:8
Issue Number:4
Column Tag:Tips & Tidbits

Tips & Tidbits

By Neil Ticktin, Editor-in-Chief

MacTutor has a new column called “Tips and Tidbits”. This column is your opportunity to spread the word about little bits of information that you find out about. These tidbits can be programming related or they can be user tips that are particularly useful to programmers.

We really want to hear from you. MacTutor will pay $25 for every tip used, and the Tip of the Month will receive $50. To submit a tip, send in a letter to the magazine. Remember, AppleLink is our preferred method of communication, but feel free to send something via US Mail. If you do send mail, enclose a printed copy and a disk copy of the letter so that it does not have to be retyped.

Let us know what you think. Remember, this is your magazine. Try ‘em out and let us know...

Tip of the month

A frequently asked question is “How to make a menu bar within a window, but makeit SIMPLE?” I have found the answer deep in the UPMG folder on the 7.0 Beta-Bang CD-Rom. This folder is a “must read” for finding clever and simple answers to many questions of this kind. I have written the code below for better readability, but the credit for the trick must be given to the UPMG file. Before calling PopUpMenuSelect, install a MenuHook. In the hook, if the mouse is out of the menu rect (and out of the menu title rect), post a mouseUp event to exitPopUpMenuSelect.

Doing it this way, the user can browse between pop-up menus without releasing themouse button, exactly like in the real menu bar. Warning: abuse of this trick will quickly drive your program to a very disconcerting user-interface. Are you really sure you need a menu bar in thiswindow?

Benoît Widemann

/* 1 */

// Global variables

short gCurrentMenu;// current menu index
MenuHandle gMenu[NUMBER_OF_MENUS];
Rect gMenuTitleRect[NUMBER_OF_MENUS];  // menus title rects in window

// There was a click in window's menubar
// Returns the item selected or 0 if no selection
// If the returned item is non-zero, the menu index is gCurrentMenu

short windowMenuSelect(WindowPtr theWindow)
{
   ProcPtr saveMenuHook;
   Point p;
   short selectedItem;

   SetWRefCon(theWindow, SetCurrentA5());  // save our A5 in window refcon
   saveMenuHook = MenuHook;// save current value in MenuHook
   MenuHook = (ProcPtr)myMenuHook; // install our menu hook
   SetPort(theWindow);
   while (Button()){   // don't use StillDown here!!
   GetMouse(&p);
   for (gCurrentMenu=0; gCurrentMenu<NUMBER_OF_MENUS; gCurrentMenu++) 
 {
   // find in which menu title rect is the mouse
   if (PtInRect(p, &gMenuTitleRect[gCurrentMenu])) {
   InvertRect(&gMenuTitleRect[gCurrentMenu]);
   p.h = gMenuTitleRect[gCurrentMenu].left+1;
   p.v = gMenuTitleRect[gCurrentMenu].bottom+1;
   LocalToGlobal(&p);
   // use only the item part returned
   selectedItem = (short)(PopUpMenuSelect(gMenu[gCurrentMenu], p.v, p.h, 
0) &
0x0000FFFF);
   InvertRect(&gMenuTitleRect[gCurrentMenu]);
   break;
   }
   }
   }
   MenuHook = saveMenuHook;// restore Menu Hook
   return(selectedItem);
}

// the menu hook

pascal void myMenuHook()
{
   Point p;
   long sysA5;

   sysA5 = SetA5(GetWRefCon(FrontWindow())); // restore our A5
   GetMouse(&p);
   if (p.v < 20 && !PtInRect(p, &gMenuTitleRect[gCurrentMenu])) {
   (void)PostEvent(mouseUp, nil);  // exit PopUpMenuSelect
   }
   (void)SetA5(sysA5); // restore system A5
}

NEED FOR SPEED

To execute system routines efficiently, you can by-pass the trap dispatcher byjumping to the routine yourself. Most practicle in tight loops. Take for example the BLockMove routine. Rewrite it as MyBlockMove:

/* 2 */

CONST
  kBlockMoveNum = $A02E; 
{Get the BlockMove Trap word from Inside Macintosh Volume III, Appendix 
C}
VAR
  blockMoveAddress:LongInt;
BEGIN
  blockMoveAddress := GetTrapAddress(kBlockMoveNum);
  start loop...
    MyBlockMove(source,dest,size, blockMoveAddress);
  end loop...
END

Write MyBlockMove in assembler like this:

;3

PROCEDURE MyBlockMove
MOVE.L     A2,D2      /*Save off A2. We'll need it later
MOVE.L     (A7)+,D1   /*Move Return address into D1
MOVEA.L    (A7),A2    /*Put BlockMove address into A2
MOVE.L     (A7)+,D0   /*Place size into D0
MOVEA.L    (A7)+,A1   /*Place destination Ptr into A1
MOVEA.L    (A7)+,A0   /*Place source Ptr into A0
MOVE.L     D1,(A7)    /*BlockMove trashes D1 & D2.
                      /*Save D1(Return address) on stack
MOVE.L     D2,-(A7)   /*Save D2(value of A2) on stack
JSR        (A2)       /*Jump to BlockMove
MOVEA.L    (A7)+,A2   /*Restore A2
MOVEA.L    (A7)+,A1   /*Place Return address into A1
JMP        (A1)       /*Jump to Return Address

MyBlockMove must be in a resident segment!!! For any questions, send an applelink to ISS.

Mark Hajek

 
AAPL
$119.00
Apple Inc.
+1.40
MSFT
$47.75
Microsoft Corpora
+0.28
GOOG
$540.37
Google Inc.
-0.71

MacTech Search:
Community Search:

Software Updates via MacUpdate

HoudahSpot 3.9.6 - Advanced file search...
HoudahSpot is a powerful file search tool built upon MacOS X Spotlight. Spotlight unleashed Create detailed queries to locate the exact file you need Narrow down searches. Zero in on files Save... Read more
RapidWeaver 6.0.3 - Create template-base...
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
iPhoto Library Manager 4.1.10 - Manage m...
iPhoto Library Manager lets you organize your photos into multiple iPhoto libraries. Separate your high school and college photos from your latest summer vacation pictures. Or keep some photo... Read more
iExplorer 3.5.1.9 - View and transfer al...
iExplorer is an iPhone browser for Mac lets you view the files on your iOS device. By using a drag and drop interface, you can quickly copy files and folders between your Mac and your iPhone or... Read more
MacUpdate Desktop 6.0.3 - Discover and i...
MacUpdate Desktop 6 brings seamless 1-click installs and version updates to your Mac. With a free MacUpdate account and MacUpdate Desktop 6, Mac users can now install almost any Mac app on macupdate.... Read more
SteerMouse 4.2.2 - Powerful third-party...
SteerMouse is an advanced driver for USB and Bluetooth mice. It also supports Apple Mighty Mouse very well. SteerMouse can assign various functions to buttons that Apple's software does not allow,... Read more
iMazing 1.1 - Complete iOS device manage...
iMazing (was DiskAid) is the ultimate iOS device manager with capabilities far beyond what iTunes offers. With iMazing and your iOS device (iPhone, iPad, or iPod), you can: Copy music to and from... Read more
PopChar X 7.0 - Floating window shows av...
PopChar X helps you get the most out of your font collection. With its crystal-clear interface, PopChar X provides a frustration-free way to access any font's special characters. Expanded... Read more
Carbon Copy Cloner 4.0.3 - Easy-to-use b...
Carbon Copy Cloner backups are better than ordinary backups. Suppose the unthinkable happens while you're under deadline to finish a project: your Mac is unresponsive and all you hear is an ominous,... Read more
ForeverSave 2.1.3 - Universal auto-save...
ForeverSave auto-saves all documents you're working on while simultaneously doing backup versioning in the background. Lost data can be quickly restored at any time. Losing data, caused by... Read more

Latest Forum Discussions

See All

Raby (Games)
Raby 1.0.3 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.3 (iTunes) Description: ***WARNING - Raby runs on: iPhone 5, iPhone 5C, iPhone 5S, iPhone 6, iPhone 6 Plus, iPad Mini Retina, iPad Mini 3, iPad 4, iPad Air,... | Read more »
Oddworld: Stranger's Wrath (Games)
Oddworld: Stranger's Wrath 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: ** PLEASE NOTE: Oddworld Stranger's Wrath requires at least an iPhone 4S, iPad 2, iPad Mini or iPod Touch 5th gen... | Read more »
Bounce On Back (Games)
Bounce On Back 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: | Read more »
Make Way for Fat Chicken, from the Maker...
Make Way for Fat Chicken, from the Makers of Scrap Squad Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Relevant Games has announced they will be releasing their reverse tower defense game, | Read more »
Tripnary Review
Tripnary Review By Jennifer Allen on November 26th, 2014 Our Rating: :: TRAVEL BUCKET LISTiPhone App - Designed for the iPhone, compatible with the iPad Want to create a travel bucket list? Tripnary is a fun way to do exactly that... | Read more »
Ossian Studios’ RPG, The Shadow Sun, is...
Ossian Studios’ RPG, The Shadow Sun, is Now Available for $4.99 Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Mmmm, Tasty – Having the Angry Birds for...
The very first Angry Birds debuted on iOS back in 2009. When you sit back and tally up the number of Angry Birds games out there and the impact they’ve had on pop culture as a whole, you just need to ask yourself: “How would the birds taste... | Read more »
Rescue Quest Review
Rescue Quest Review By Jennifer Allen on November 26th, 2014 Our Rating: :: PATH BASED MATCH-3Universal App - Designed for iPhone and iPad Guide a wizard to safety by matching gems. Rescue Quest might not be an entirely original... | Read more »
You Can Play the Final Chapter of Lone W...
You Can Play the Final Chapter of Lone Wolf: Dawn Over V’taag Right Now Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Swords of Anima (Games)
Swords of Anima 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: A new tactical turn-based RPG experience. Command the Savior Rex Squad in an epic journey of courage and deception. Can you... | Read more »

Price Scanner via MacPrices.net

2014 1.4GHz Mac mini on sale for $449, save $...
 B&H Photo has the new 1.4GHz Mac mini on sale for $449.99 including free shipping plus NY tax only. Their price is $50 off MSRP, and it’s the lowest price available for this new model. Adorama... Read more
Early Black Friday pricing on 27-inch 5K iMac...
 B&H Photo continues to offer Black Friday sale prices on the 27″ 3.5GHz 5K iMac, in stock today and on sale for $2299 including free shipping plus NY sales tax only. Their price is $200 off MSRP... Read more
Early Black Friday sale prices on iPad Air 2,...
 MacMall is discounting iPad Air 2s by up to $75 off MSRP as part of their Black Friday sale. Shipping is free: - 16GB iPad Air WiFi: $459 $40 off - 64GB iPad Air WiFi: $559 $40 off - 128GB iPad Air... Read more
Early Black Friday MacBook Air sale prices, $...
 MacMall has posted early Black Friday MacBook Air sale prices. Save $101 on all models for a limited time: - 11″ 1.4GHz/128GB MacBook Air: $798 - 11″ 1.4GHz/256GB MacBook Air: $998 - 13″ 1.4GHz/... Read more
Why iPhone 6 Tablet/Laptop Cannibalization Is...
247wallst.com blogger Douglas A. McIntyre noted last week that according to research posted on the Applovin blog site the iPhone 6 is outselling the iPhone 6 Plus by a wide margin . Hardly a surprise... Read more
Worldwide Tablet Growth Expected to Slow to 7...
The global tablet market is expected to record massive deceleration in 2014 with year-over-year growth slowing to 7.2%, down from 52.5% in 2013, according to a new forecast from International Data... Read more
Touchscreen Glove Company Announces New Produ...
Surrey, United Kingdom based TouchAbility specializes in design and manufacture of a wide variety of products compatible with touchscreen devices including smartphones, tablets and computers. Their... Read more
OtterBox Alpha Glass Screen Protectors for iP...
To complement the bigger, sharper displays on the latest Apple devices, OtterBox has introduced Alpha Glass screen protectors to the iPhone 6 and iPhone 6 Plus. The fortified glass screen protectors... Read more
Early Black Friday Mac Pro sale, 6-Core 3.5GH...
 B&H Photo has the 6-Core 3.5GHz Mac Pro on sale today for $3499 including free shipping plus NY sales tax. Their price is $500 off MSRP, and it’s the lowest price available for this model from... Read more
Early Black Friday sale price: 15-inch 2.2GHz...
 B&H Photo has the 2014 15″ 2.2GHz Retina MacBook Pro on sale today for $1699.99. Shipping is free, and B&H charges NY sales tax only. Their price is $300 off MSRP, equalling Best Buy’s price... Read more

Jobs Board

*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
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* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the 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
*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
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.