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

Tinderbox 7.0.1 - Store and organize you...
Tinderbox is a personal content management assistant. It stores your notes, ideas, and plans. It can help you organize and understand them. And Tinderbox helps you share ideas through Web journals... Read more
Direct Mail 4.3.9 - Create and send grea...
Direct Mail is an easy-to-use, fully-featured email marketing app purpose-built for OS X. It lets you create and send great looking email campaigns. Start your newsletter by selecting from a gallery... Read more
FotoMagico 5.4 - Powerful slideshow crea...
FotoMagico lets you create professional slideshows from your photos and music with just a few, simple mouse clicks. It sports a very clean and intuitive yet powerful user interface. High image... Read more
beaTunes 4.6.12 - Organize your music co...
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
Spotify 1.0.49.125. - 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
Eye Candy 7.2.0.50 - 30 professional Pho...
Eye Candy renders realistic effects that are difficult or impossible to achieve in Photoshop alone, such as Fire, Chrome, and the new Lightning. Effects like Animal Fur, Smoke, and Reptile Skin are... Read more
Safari Technology Preview 10.2 - 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
Microsoft Office 2016 15.31 - Popular pr...
Microsoft Office 2016 - Unmistakably Office, designed for Mac. The new versions of Word, Excel, PowerPoint, Outlook and OneNote provide the best of both worlds for Mac users - the familiar Office... Read more
QuickBooks 16.1.12.1564 R13 - Financial...
QuickBooks helps you manage your business easily and efficiently. Organize your finances all in one place, track money going in and out of your business, and spot areas where you can save. Built for... Read more
1Password 6.6.1 - Powerful password mana...
1Password is a password manager that uniquely brings you both security and convenience. It is the only program that provides anti-phishing protection and goes beyond password management by adding Web... Read more

Tavern Guardians (Games)
Tavern Guardians 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Tavern Guardians is a Hack-and-Slash action game played in the style of a match-three. You can experience high pace action... | Read more »
Slay your way to glory in idle RPG Endle...
It’s a golden age for idle games on the mobile market, and those addictive little clickers have a new best friend. South Korean developer Ekkorr released Endless Frontier last year, and players have been idling away the hours in the company of its... | Read more »
Tiny Striker: World Football Guide - How...
| Read more »
Good news everyone! Futurama: Worlds of...
Futurama is finding a new home on mobile in TinyCo and Fox Interactive's new game, Futurama: Worlds of Tomorrow. They're really doing it up, bringing on board Futurama creator Matt Groening along with the original cast and writers. TinyCo wants... | Read more »
MUL.MASH.TAB.BA.GAL.GAL (Games)
MUL.MASH.TAB.BA.GAL.GAL 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: ENDLESS UPGRADES. CONSTANT DANGER. ANCIENT WISDOM. BOUNCY BALLS. Launch Sale, 40% OFF for a very limited time!!! MUL.... | Read more »
Dungeon Rushers (Games)
Dungeon Rushers 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Dungeon Rushers is a 2D tactical RPG combining dungeon crawler’s gameplay and turn based fights. Manage your team, loot dusty... | Read more »
Blasty Bubs is a colorful Pinball and Br...
QuickByte Games has another arcade treat in the works -- this time it's a mishmash of brick breaking and Pinball mechanics. It's called Blasty Bubs, and it's a top down brickbreaker that has you slinging balls around a board. [Read more] | Read more »
Corsola and Heracross are the new region...
Generation 2 finally launched in Pokémon GO, unleashing a brand new batch of Pokémon into the wild. Even before the update went live people were speculating on how to catch elusive Pokémon like the legendary "dogs", Unknown, and whether or not... | Read more »
The Warlock of Firetop Mountain (Games)
The Warlock of Firetop Mountain 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: An epic adventure through a mysterious mountain filled with monsters, magic and mayhem! “...it looks downright... | Read more »
Fantasy MMORPG MU Origin’s receives a hu...
Developer Webzen are looking to take their highly popular fantasy battler MU Origin to the next level this month, with its most ambitious overhaul yet. The latest update introduces the long sought after Server Arena, new treasure dungeons, and much... | Read more »

Price Scanner via MacPrices.net

15-inch Touch Bar MacBook Pros on sale for up...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
12-inch Retina MacBooks on sale for $1150, $1...
B&H has 12″ 1.1GHz Retina MacBooks on sale for $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 12″ 1.1GHz Space Gray Retina MacBook: $1149 $150 off MSRP - 12″ 1.1GHz... Read more
Apple restocks refurbished 11-inch MacBook Ai...
Apple has Certified Refurbished 11″ MacBook Airs (the latest models recently discontinued by Apple), available for up to $170 off original MSRP. An Apple one-year warranty is included with each... Read more
Apple Park Opens to Employees in April With T...
Apple has announced that Apple Park, the company’s new 175-acre campus, will be ready for employees to begin occupying in April. The process of moving more than 12,000 people will take over six... Read more
Manhattan Neighbors for Safer Telecommunicati...
A new education and advocacy group focused on cell phone and wireless risks, Manhattan Neighbors for Safer Telecommunications, launched today at http://www.ManhattanNeighbors.org. Manhattan... Read more
Portable Dual DisplayPort Monitor Dock Enable...
IOGEAR has announced the launch of its USB-C Dual DisplayPort Monitor Portable Dock (GUC3CMST). The dock enables users to easily connect two DisplayPort monitors to a USB-C or Thunderbolt 3 laptop to... Read more
13-inch 2.7GHz Retina MacBook Pro on sale for...
Amazon.com has restocked the 13″ 2.7GHz/128GB Retina MacBook Pro (MF839LL/A) for $200 off MSRP including free shipping: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1099 $200 off MSRP This model tends to... Read more
Apple’s New iPad Ads Don’t Address Pro Users’...
Apple launched a new tranche of iPad Pro TV ads last week addressing actual queries and challenges from the Twitterverse, albeit using actors for the visuals. That’s great. As an iPad fan and heavy... Read more
Free Verbum Catholic Bible Study App For iOS
The Verbum mobile app runs on Logos’ powerful Bible software and is an advanced resource for mobile Catholic study. The Verbum app surrounds the Bible with the Tradition. Verbum comes with 15 free... Read more
27-inch Apple iMacs on sale for up to $200 of...
B&H Photo has 27″ Apple iMacs on sale for up to $200 off MSRP, each including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2099.99 $200 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $... Read more

Jobs Board

Manager *Apple* Systems Administration - Pu...
Req ID 3315BR Position Title Manager, Apple Systems Administration Job Description The Manager of Apple Systems Administration oversees the administration and 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
Manager *Apple* Systems Administration - Pu...
Req ID 3315BR Position Title Manager, Apple Systems Administration Job Description The Manager of Apple Systems Administration oversees the administration and 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
Manager *Apple* Systems Administration - Pu...
Req ID 3315BR Position Title Manager, Apple Systems Administration Job Description The Manager of Apple Systems Administration oversees the administration and Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.