TweetFollow Us on Twitter

May 94 Tips
Volume Number:10
Issue Number:5
Column Tag:Tips & Tidbits

Related Info: Font Manager Window Mgr

Tips & Tidbits

By Scott T Boyd, Editor

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Tip Of The Month

Counting items in a directory

Here’s a piece of code which counts the number of items in a directory. It’s particularly useful if you are going to do something to every file in a directory (and its subdirectories) and want to show a progress bar. It counts both invisible and visible items, so if you don’t want invisibles counted, you’ll need to modify it. The CountGlobals structure is used to minimize the amount of stack space used when recursively calling GetLevelCount and to hold global information that might be needed at any time.

- Jim Luther, Cupertino, CA


/* 1 */
struct CountGlobals
{
 OSErr  result;  // temp holder of results - saves 2 bytes of stack at 
each level
 Str63  itemName;// the name of the current item
 CInfoPBRec myCPB; // the parameter block used for PBGetCatInfo calls 
 
 unsigned long files;// the number of files in the directory structure 

 unsigned long directories; // the number of directories in the directory 
structure
};
typedef struct CountGlobals CountGlobals;
typedef CountGlobals *CountGlobalsPtr;
// static prototypes
static void GetLevelCount(long currentDirID, 
 CountGlobalsPtr theGlobals);
void CountDirectoryItems(short srcVRefNum, long srcDirID,
 unsigned long *files, unsigned long *directories);


static void GetLevelCount(long currentDirID, 
 CountGlobalsPtr theGlobals)
{
short index = 1; 
do {
 theGlobals->myCPB.dirInfo.ioFDirIndex = index;
 // we need to do this every time through; GetCatInfo returns ioFlNum 
in this field
 theGlobals->myCPB.dirInfo.ioDrDirID = currentDirID;     

 theGlobals->result =
 PBGetCatInfoSync((CInfoPBPtr)&theGlobals->myCPB);
 if (theGlobals->result == noErr)
 {
 if ((theGlobals->myCPB.dirInfo.ioFlAttrib & ioDirMask) != 0)
 {
 // we have a directory
 ++(theGlobals->directories);

 GetLevelCount(  theGlobals->myCPB.dirInfo.ioDrDirID,
 theGlobals);  // recurse

 theGlobals->result = noErr;// clear error return on way back
 }
 else
 {
 // we have a file
 ++(theGlobals->files);
 }
 }
 ++index;
} while (theGlobals->result == noErr);
}


void CountDirectoryItems(short srcVRefNum, 
 long srcDirID,
 unsigned long *files,
 unsigned long *directories)
{
CountGlobals theGlobals;

 theGlobals.myCPB.dirInfo.ioNamePtr = theGlobals.itemName;
 theGlobals.myCPB.dirInfo.ioVRefNum = srcVRefNum;
 theGlobals.files = 0;
 theGlobals.directories = 0;

 GetLevelCount(srcDirID, &theGlobals);

 *files = theGlobals.files;
 *directories = theGlobals.directories;
}

Spread the word about things you know that others could benefit from knowing! Send

us your tips and tidbits, especially programming-related tips. We’re also looking for user tips particularly useful to programmers .

MacTech Magazine will pay $25 for every tip used, and $50 for the Tip of the Month. You can take your award in orders or subscriptions if you prefer.

To submit a tip, send it in by e-mail. (Please make sure your code compiles). See page two for our addresses.

Popup Menus Pop Up Again

In the February issue, Laurent Haas suggested a method of forcing pop-up menus to appear in a certain font and size. His method involved forcing the system to use a new system font. I used to use this method as well, since it was the method suggested in an Apple DTS Q&A stack. Unfortunately, it has two drawbacks:

(1) It is very slow because the system has to rebuild the cached font info every time the font manager sees that LastSPExtra (the global variable at 0x0B4C) is -1. (That is why the -1 is being stuffed in there in the first place - otherwise the other changes are ignored because of the caching).

(2) It doesn’t work - no kidding... if it works consistently on a particular machine, you are very lucky. Much of the time it simply does not have the desired effect - usually the font will change, but the size won't.

The method I use now is to patch _TextFont and _TextSize immediately before calling PopupMenuSelect and then unpatch them immediately afterwards (to minimize interference with anything else that uses these traps). My patches call the original routine but with a substituted argument for the font number or size. This works consistently and has no speed penalty to speak of. After unpatching, I also need to restore the font and size of the window manager port, since the menu defproc has explicitly set them by calling TextFont(0) and TextSize(0). Because of the patches, the WMgrPort now has a font and size different from the system font and size. I set the current port to the WMgrPort and do a TextFont and a TextSize to set them back to 0. On a colour Mac, this must also be done for the Colour Window manager port as well.

This method doesn’t use any low memory globals, so is less likely to break. It does, however, require tweaking the window manager port(s), which could possibly break but I doubt it.

- Rowan Daniell, Software Engineer, Cowie Associates Ltd

Moving Targets In Mpw

With the advent of the Universal C interfaces it is a pain switching back and forth between the CIncludes and PPCCIncludes folders. Adding the following three lines to your UserStartUp-<yourname> script will make life easier:


/* 2 */
AddMenu Tools 'Use Universal CIncludes' 
 'SET CIncludes "{MPW}Interfaces:PPCCIncludes:"'

AddMenu Tools 'Use Standard CIncludes' 
 'SET CIncludes "{MPW}Interfaces:CIncludes:"'

AddMenu Tools (- ''

Any menu can be specified, but I chose to add these commands to the top of my Tools menu (which is also why I added a dividing line beneath the two items). Selecting an item causes the shell variable {CIncludes} to be set to the appropriate path. This can make life much easier when jumping between older projects and new, PowerPC-savvy projects.

- Bryan Pietrzak, Softdisk Publishing

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

ClamXav 2.10 - Virus checker based on Cl...
ClamXav is a popular virus checker for OS X. I have been working on ClamXav for more than 10 years now, and over those years, I have invested a huge amount of my own time and energy into bringing... Read more
Tweetbot 2.4.4 - Popular Twitter client.
Tweetbot is a full-featured OS X Twitter client with a lot of personality. Whether it's the meticulously-crafted interface, sounds and animation, or features like multiple timelines and column views... Read more
Sierra Cache Cleaner 11.0.1 - Clear cach...
Sierra Cache Cleaner is an award-winning general purpose tool for macOS X. SCC makes system maintenance simple with an easy point-and-click interface to many macOS X functions. Novice and expert... Read more
Things 2.8.8 - Elegant personal task man...
Things is a task management solution that helps to organize your tasks in an elegant and intuitive way. Things combines powerful features with simplicity through the use of tags and its intelligent... Read more
Remotix 4.1 - Access all your computers...
Remotix is a fast and powerful application to easily access multiple Macs (and PCs) from your own Mac. Features Complete Apple Screen Sharing support - including Mac OS X login, clipboard... Read more
Airfoil 5.1.2 - Send audio from any app...
Airfoil allows you to send any audio to AirPort Express units, Apple TVs, and even other Macs and PCs, all in sync! It's your audio - everywhere. With Airfoil you can take audio from any... Read more
Firefox 49.0.1 - Fast, safe Web browser.
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
Default Folder X 5.0.7 - Enhances Open a...
Default Folder X attaches a toolbar to the right side of the Open and Save dialogs in any OS X-native application. The toolbar gives you fast access to various folders and commands. You just click on... Read more
Safari Technology Preview 10.1 - The new...
Safari Technology Preview contains the most recent additions and improvements to WebKit and the latest advances in Safari web technologies. And once installed, you will receive notifications of... Read more
Pinegrow Web Designer 2.94 - Mockup and...
Pinegrow Web Designer is desktop app that lets you mockup and design webpages faster with multi-page editing, CSS and LESS styling, and smart components for Bootstrap, Foundation, Angular JS, and... Read more

3 reasons you need to play Kingdom: New...
Developed by a tag team of indie developers - Thomas "Noio" van den Berg and Marco "Licorice" Bancale - Kingdom is a vibrant medieval fantasy adventure that casts players as a king or queen who must expand their empire by exploring the vasts lands... | Read more »
JoyCity have launched a brand new King o...
Great news for all of you Game of Dice fans out there - JoyCity have just released a brand new limited edition pack with a really cool twist. The premise of Game of Dice is fairly straightforward, asking you to roll dice to navigate your way around... | Read more »
Burly Men at Sea (Games)
Burly Men at Sea 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Burly Men at Sea is a folktale about a trio of large, bearded fishermen who step away from the ordinary to seek adventure. | Read more »
3 tips for catching the gnarliest waves...
Like a wave breaking on the shore, Tidal Rider swept its way onto the App Store charts this week settling firmly in the top 10. It’s a one-touch high score-chaser in which you pull surfing stunts while dodging seagulls and collecting coins. The... | Read more »
The beginner's guide to destroying...
Age of Heroes: Conquest is 5th Planet Games’ all new turn-based multiplayer RPG, full of fantasy exploration, guild building, and treasure hunting. It’s pretty user-friendly as far as these games go, but when you really get down to it, you’ll find... | Read more »
Infinite Tanks (Games)
Infinite Tanks 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: | Read more »
Agatha Christie - The ABC Murders (FULL)...
Agatha Christie - The ABC Murders (FULL) 1.0 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0 (iTunes) Description: Agatha Christie: The ABC Murders Your weapon is your knowledge. Your wits will be put to the ultimate... | Read more »
HeadlessD (Games)
HeadlessD 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: HeadlessD is hand-painted dungeon crawler with intuitive touch controls and NO in-app purchases. | Read more »
Leaf for Twitter (Social Networking)
Leaf for Twitter 1.0.1 Device: iOS iPhone Category: Social Networking Price: $4.99, Version: 1.0.1 (iTunes) Description: | Read more »
Banner Saga 2 (Games)
Banner Saga 2 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: The epic award winning story-based role-playing game continues its emotional journey across a breaking world. Lead your Viking... | Read more »

Price Scanner via MacPrices.net

MacBook Airs on sale for up to $100 off MSRP
B&H Photo has 13″ and 11″ MacBook Airs on sale for up to $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 11″ 1.6GHz/128GB MacBook Air: $799 $100 MSRP - 11″ 1.6GHz/256GB... Read more
Apple refurbished 12-inch 128GB iPad Pros ava...
Apple has Certified Refurbished 12″ Apple iPad Pros available for up to $160 off the cost of new iPads. An Apple one-year warranty is included with each model, and shipping is free: - 32GB 12″ iPad... Read more
Phone2Action Unveils New Voter Turnout Techno...
Phone2Action, a leading digital advocacy platform, today launched its Tech to Vote Civic Action Center digital advocacy and communications platform on National Voter Registration Day September 27.... Read more
Apple & Deloitte Team Up to Help Business...
Apple and international professional services firm Deloitte have announced a partnership to help companies quickly and easily transform their workflow dynamics by maximizing the power, ease-of-use,... Read more
Chop Commute – See Traffic and Drive Times on...
Shrewsbury, Massachusetts based Indie developer, InchWest has released Chop Commute 1.61, a Mac app that takes the guesswork out of daily commute by showing real-time traffic and drive times right on... Read more
12-inch 32GB WiFi iPad Pros on sale for $50 o...
B&H Photo has 12″ 32GB WiFi Apple iPad Pros on sale for $50 off MSRP, each including free shipping. B&H charges sales tax in NY only: - 12″ Space Gray 32GB WiFi iPad Pro: $749 $50 off MSRP -... Read more
Recent price drops on refurbished iPad minis...
Apple recently dropped prices on several Certified Refurbished iPad mini 4s and 2s as well as iPad Air 2s. An Apple one-year warranty is included with each model, and shipping is free: - 16GB iPad... Read more
Apple refurbished Mac minis available startin...
Apple has Certified Refurbished Mac minis available starting at $419. Apple’s one-year warranty is included with each mini, and shipping is free: - 1.4GHz Mac mini: $419 $80 off MSRP - 2.6GHz Mac... Read more
13-inch 2.5GHz MacBook Pro available for $928...
Overstock has the 13″ 2.5GHz MacBook Pro available for $927.99 including free shipping. Their price is $171 off MSRP. Read more
Buying McLaren Would Give Apple Instant Car C...
Apple “iCar” rumors have waxed and waned over the years, piquing interest and speculation as to whether Apple is seriously interested in getting into the automotobile business, either in a joint... Read more

Jobs Board

Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
*Apple* Wireless Lead - T-ROC - The Retail O...
…wealth of knowledge in wireless sales and activations to the Beautiful and NEW APPLE Experience store within MACYS.. THIS role, APPLE Wireless Lead, isbrandnewas Read more
Lead *Apple* Advocate - T-ROC - The Retail...
…Company, is proud of its unprecedented relationship with our partner and client, APPLE ,in bringing amazing" APPLE ADVOCATES"to "non" Apple store locations. Read more
*Apple* Advocate - T-ROC - The Retail Outsou...
…Company, is proud of its unprecedented relationship with our partner and client, APPLE ,in bringing amazing" APPLE ADVOCATES"to "non" Apple store locations. Read more
Lead *Apple* Solutions Consultant - Apple (...
# Lead Apple Solutions Consultant Job Number: 51829230 Detroit, Michigan, United States Posted: Sep. 19, 2016 Weekly Hours: 40.00 **Job Summary** The Lead ASC is an Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.