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

NetShade 6.3.1 - Browse privately using...
NetShade is an anonymous proxy and VPN app+service for Mac. Unblock your Internet through NetShade's high-speed proxy and VPN servers spanning seven countries. NetShade masks your IP address as you... Read more
Dragon Dictate 4.0.7 - Premium voice-rec...
With Dragon Dictate speech recognition software, you can use your voice to create and edit text or interact with your favorite Mac applications. Far more than just speech-to-text, Dragon Dictate lets... Read more
Persecond 1.0.2 - Timelapse video made e...
Persecond is the easy, fun way to create a beautiful timelapse video. Import an image sequence from any camera, trim the length of your video, adjust the speed and playback direction, and you’re done... Read more
GIMP 2.8.14p2 - Powerful, free image edi...
GIMP is a multi-platform photo manipulation tool. GIMP is an acronym for GNU Image Manipulation Program. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching,... Read more
Sandvox 2.10.2 - Easily build eye-catchi...
Sandvox is for Mac users who want to create a professional looking website quickly and easily. With Sandvox, you don't need to be a Web genius to build a stylish, feature-rich, standards-compliant... Read more
LibreOffice 5.0.1.2 - 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
f.lux 36.1 - Adjusts the color of your d...
f.lux makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day. Ever notice how people texting at night have that eerie blue glow? Or wake... Read more
VirtualBox 5.0.2 - x86 virtualization so...
VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers... Read more
File Juicer 4.43 - Extract images, video...
File Juicer is a drag-and-drop can opener and data archaeologist. Its specialty is to find and extract images, video, audio, or text from files which are hard to open in other ways. In computer... Read more
Apple MainStage 3.2 - Live performance t...
MainStage 3 makes it easy to bring to the stage all the same instruments and effects that you love in your recording. Everything from the Sound Library and Smart Controls you're familiar with from... Read more

ReBoard: Revolutionary Keyboard (Utilit...
ReBoard: Revolutionary Keyboard 1.0 Device: iOS Universal Category: Utilities Price: $1.99, Version: 1.0 (iTunes) Description: Do everything within the keyboard without switching apps! If you are in WhatsApp, how do you schedule a... | Read more »
Tiny Empire (Games)
Tiny Empire 1.1.3 Device: iOS Universal Category: Games Price: $2.99, Version: 1.1.3 (iTunes) Description: Launch cannonballs and blow tiny orcs into thousands of pieces in this intuitive fantasy-themed puzzle shooter! Embark on an... | Read more »
Astropad Mini (Productivity)
Astropad Mini 1.0 Device: iOS iPhone Category: Productivity Price: $4.99, Version: 1.0 (iTunes) Description: *** 50% off introductory price! ​*** Get the high-end experience of a Wacom tablet at a fraction of the price with Astropad... | Read more »
Emo Chorus (Music)
Emo Chorus 1.0.0 Device: iOS Universal Category: Music Price: $1.99, Version: 1.0.0 (iTunes) Description: Realistic Choir simulator ranging from simple Chorus emulation to full ensemble Choir with 128 members. ### introductory offer... | Read more »
Forest Spirit (Games)
Forest Spirit 1.0.5 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.5 (iTunes) Description: | Read more »
Ski Safari 2 (Games)
Ski Safari 2 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: The world's most fantastical, fun, family-friendly skiing game is back and better than ever! Play as Sven's sister Evana, share... | Read more »
Lara Croft GO (Games)
Lara Croft GO 1.0.47768 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.47768 (iTunes) Description: Lara Croft GO is a turn based puzzle-adventure set in a long-forgotten world. Explore the ruins of an ancient... | Read more »
Whispering Willows (Games)
Whispering Willows 1.23 Device: iOS Universal Category: Games Price: $4.99, Version: 1.23 (iTunes) Description: **LAUNCH SALE 50% OFF** - Whispering Willows is on sale for 50% off ($4.99) until September 9th. | Read more »
Calvino Noir (Games)
Calvino Noir 1.1 Device: iOS iPhone Category: Games Price: $3.99, Version: 1.1 (iTunes) Description: The film noir stealth game. Calvino Noir is the exploratory, sneaking adventure through the 1930s European criminal underworld.... | Read more »
Angel Sword (Games)
Angel Sword 1.0 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0 (iTunes) Description: Prepare to adventure in the most epic full scale multiplayer 3D RPG for mobile! Experience amazing detailed graphics in full HD.... | Read more »

Price Scanner via MacPrices.net

Big Grips Lift Handle For iPad Air and iPad A...
KEM Ventures, Inc. which pioneered the extra-large, super-protective iPad case market with the introduction of Big Grips Frame and Stand in 2011, is launching Big Grips Lift featuring a new super-... Read more
Samsung Launches Galaxy Tab S2, Its Most Powe...
Samsung Electronics America, Inc. has announced the U.S. release of the Galaxy Tab S2, its thinnest, lightest, ultra-fast tablet. Blending form and function, elegant design and multitasking power,... Read more
Tablet Screen Sizes Expanding as iPad Pro App...
Larger screen sizes are gaining favor as the tablet transforms into a productivity device, with shipments growing 185 percent year-over-year in 2015. According to a new Strategy Analytics’ Tablet... Read more
Today Only: Save US$50 on Adobe Elements 13;...
Keep the memories. lose the distractions. Summer’s winding down and it’s time to turn almost perfect shots into picture perfect memories with Elements 13. And get the power to edit both photos and... Read more
1.4GHz Mac mini on sale for $449, save $50
Best Buy has the 1.4GHz Mac mini on sale for $50 off MSRP on their online store. Choose free shipping or free local store pickup (if available). Price for online orders only, in-store price may vary... Read more
12-inch 1.1GHz Gold MacBook on sale for $1149...
B&H Photo has the 12″ 1.1GHz Gold Retina MacBook on sale for $1149.99 including free shipping plus NY sales tax only. Their price is $150 off MSRP, and it’s the lowest price available for this... Read more
27-inch 3.3GHz 5K iMac on sale for $1849, sav...
Best Buy has the 27″ 3.3GHz 5K iMac on sale for $1849.99. Their price is $150 off MSRP, and it’s the lowest price available for this model. Choose free shipping or free local store pickup (if... Read more
Worldwide Tablet Shipments Expected to Declin...
Does Apple badly need a touchscreen convertible/hybrid laptop MacBook? Yes, judging from a new market forecast from the International Data Corporation (IDC) Worldwide Quarterly Tablet Tracker, which... Read more
Continued PC Shipment Shrinkage Expected Thro...
Worldwide PC shipments are expected to fall by -8.7 percent in 2015 and not stabilize until 2017, according to the latest International Data Corporation (IDC) Worldwide Quarterly PC Tracker data. The... Read more
Imminent iPhone 6s Announcement Leads To 103%...
NextWorth Solutions, with its online and in-store electronics trade-in programs including http://NextWorth.com, reports that it has experienced a 103 percent surge in quoted trade-in values over the... Read more

Jobs Board

*Apple* Music, Business Operations - Apple I...
Changing the world is all in a day039s work at Apple . If you love innovation, here039s your chance to make a career of it. You039ll work hard. But the job comes with Read more
WW *Apple* Retail Online Store: Customer In...
**Job Summary** The Apple Retail - Online Store is seeking an experienced web merchandising analytics professional to join the Customer Insights Team. The Web Read more
Senior Payments Security Manager - *Apple*...
**Job Summary** Apple , Inc. is looking for a highly motivated, innovative and hands-on senior payments security manager to join the Apple Pay security team. You will Read more
Software QA Engineer, *Apple* Pay Security...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
Business Process Engineer ( *Apple* Online S...
**Job Summary** The Apple Online Support Planning team is looking for an experienced Business Process engineer to lead key business process improvement initiatives Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.