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

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

LaunchBar 6.9 - Powerful file/URL/email...
LaunchBar is an award-winning productivity utility that offers an amazingly intuitive and efficient way to search and access any kind of information stored on your computer or on the Web. It provides... Read more
MacFamilyTree 8.2.1 - Create and explore...
MacFamilyTree gives genealogy a facelift: modern, interactive, convenient and fast. Explore your family tree and your family history in a way generations of chroniclers before you would have loved.... Read more
Spotify 1.0.57.474. - Stream music, crea...
Spotify is a streaming music service that gives you on-demand access to millions of songs. Whether you like driving rock, silky R&B, or grandiose classical music, Spotify's massive catalogue puts... Read more
VOX 2.8.26 - Music player that supports...
VOX just sounds better! The beauty is in its simplicity, yet behind the minimal exterior lies a powerful music player with a ton of features and support for all audio formats you should ever need.... Read more
beaTunes 5.0.1 - Organize your music col...
beaTunes is a full-featured music player and organizational tool for music collections. How well organized is your music library? Are your artists always spelled the same way? Any R.E.M. vs REM?... Read more
LibreOffice 5.3.4.2 - Free, open-source...
LibreOffice is an office suite (word processor, spreadsheet, presentations, drawing tool) compatible with other major office suites. The Document Foundation is coordinating development and... Read more
Sparkle Pro 2.2 - $79.99
Sparkle Pro will change your mind if you thought building websites wasn't for you. Sparkle is the intuitive site builder that lets you create sites for your online portfolio, team or band pages, or... Read more
calibre 3.1.1 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more
calibre 3.1.1 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more
Sparkle Pro 2.2 - $79.99
Sparkle Pro will change your mind if you thought building websites wasn't for you. Sparkle is the intuitive site builder that lets you create sites for your online portfolio, team or band pages, or... Read more

Latest Forum Discussions

See All

This War of Mine gets a new ending and m...
This War of Mine just got a big new update, featuring free DLC that adds a new ending to the game, among other exciting changes. The update is celebrating the game's two-year release anniversary. Apart from the new ending, which will be quite... | Read more »
Summon eight new heroes in Fire Emblem H...
Nintendo keeps coming at us with Fire Emblem Heroes updates, and it doesn't look like that trend is stopping anytime soon. The folks behind the game have just announced the new War of the Clerics Voting Gauntlet, expected to start next Tuesday. [... | Read more »
The best deals on the App Store this wee...
iOS publishers are pulling out all the stops this week -- there's a huge number of seriously great games at discounted prices this week. Let's not waste any time and get right down to business. [Read more] | Read more »
The House of da Vinci (Games)
The House of da Vinci 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: Enter The House of Da Vinci, a new must-try 3D puzzle adventure game. Solve mechanical puzzles, discover hidden... | Read more »
Solve the disappearance of history’s gre...
Blue Brain Games invites you to indulge in an immersive hands-on 3D puzzle adventure in similar vein to The Room series, with its debut release The House of Da Vinci. Set during the historic period of the Italian Renaissance (when Leonardo himself... | Read more »
Age of Rivals (Games)
Age of Rivals 3.3 Device: iOS Universal Category: Games Price: $.99, Version: 3.3 (iTunes) Description: Deep civilization-building strategy in a fast-paced card game! | Read more »
Panthera Frontier (Games)
Panthera Frontier 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: | Read more »
Angry Birds Evolution beginner's gu...
Angry Birds changes things up a fair bit in its latest iteration, Angry Birds Evolution. The familiar sling-shot physics mechanics are still there, but the game now features team-based gameplay, RPG elements, and a new top-down view. With all of... | Read more »
Sega Forever is for the retro game fans
Sega is launching a new retro games service titled Sega Forever, in a move that's sure to delight games enthusiasts with a bit of nostalgia. Sega's releasing five classic games for free. The titles include Sonic the Hedgehog, Phantasy Star II,... | Read more »
The Little Acre (Games)
The Little Acre 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: | Read more »

Price Scanner via MacPrices.net

ABBYY TextGrabber 6 for iOS Implements Instan...
ABBYY has announced the release of TextGrabber 6.0.0, an important feature update to the company’s productivity app developed for iOS and Android devices. TextGrabber 6.0 now offers Real-Time... Read more
vPhone, First Smartphone That Can’t Be Lost,...
Austin, Texas based Hypori has introduced the vPhone, a virtual smartphone that affords every business user the benefits of separate work and personal phones, conveniently delivered on a single... Read more
Save this weekend with 2016 refurbished MacBo...
Apple has dropped prices on Certified Refurbished 2016 15″ and 13″ MacBook Pros by as much as $590 off original MSRP. An Apple one-year warranty is included with each model, and shipping is free: -... Read more
New 27-inch 3.4GHz iMac on sale for $1699, sa...
MacMall has the new 2017 27″ 3.4GHz iMac (MNE92LL/A) in stock and on sale for $1699 including free shipping. Their price is $100 off MSRP. Read more
Clearance 2016 MacBook Pros available for up...
B&H Photo has clearance 2016 13″ and 15″ MacBook Pros in stock today and on sale for up to $400 off original MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: - 15″ 2.7GHz... Read more
Apple Ranks 9th In comScore Top 50 U.S. Digit...
comScore, Inc. has released its monthly ranking of U.S. online activity at the top digital media properties for May 2017 based on data from comScore Media Metrix Multi-Platform. * Entity has... Read more
10.5-inch iPad Pros available for up to $20 o...
B&H Photo has the new 2017 10.5″ iPad Pros available for up to $20 off MSRP including free shipping plus NY & NJ sales tax only: - 64GB iPad Pro WiFi: $649 - 256GB iPad Pro WiFi: $749 - 512GB... Read more
Three Off-The-Beaten-Track iOS Apps That Dese...
One of the great things about using iPads and iPhones is the vast selection of apps available for most anything you want or need to do. The three outlined in this article have been in my core app... Read more
Apple No. 1 Spot In Gartner Top 100 Vendors i...
Gartner, Inc. has unveiled the top global 100 vendors in IT in 2016 based on their revenue across IT (excluding communication services) and component market segments. In the Gartner Global Top 100:... Read more
Clearance iMacs available for up to $300 off...
B&H Photo has clearance 21″ and 27″ Apple iMacs available starting at $949, each including free shipping plus NY & NJ sales tax only: - 27″ 3.3GHz iMac 5K: $1999 $300 off original MSRP - 27″... Read more

Jobs Board

*Apple* News Product Marketing Mgr., Publish...
…organizational consensus on strategy and vision for publisher tools, authoring, and Apple News Format.Carries this strategy and vision across the organization to Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Security Data Analyst - *Apple* Information...
…data sources need to be collected to allow Information Security to better protect Apple employees and customers from a wide range of threats.Act as the subject matter Read more
Lead *Apple* Solutions Consultant - Apple I...
…integrity, and trust.Success Metrics/Key Performance Indicators:Quantitative* Year over Year growth in Apple Product and Beyond the Box sales in the assigned Point of Read more
*Apple* Solutions Consultant till v%u00E5r...
…ethics, integrity, and trust.Success Metrics/Key Performance Indicators:QuantitativeYear over Year growth in Apple Product and Beyond the Box sales in the assigned Point Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.