TweetFollow Us on Twitter

Nov 95 Top 10
Volume Number:11
Issue Number:11
Column Tag:Symantec Top 10

Symantec Top 10

This monthly column, written by Symantec’s Technical Support Engineers, aims _to provide you with technical information based on the use of Symantec products.

By Levi Brown, Symantec Corp.

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

Q: I set my project’s preferred and minimum memory partition sizes in the “Project Type” window, but when I build my application, the preferred and minimum memory partition sizes are always set to a different value. What is wrong?

A: The project’s resource file contains a SIZE resource that always overrides the value set under the Project, Options..., “Project Type” window. To solve this problem, open the ProjectName.rsrc resource file with ResEdit and delete the SIZE resource.

Q: I have heard of this program called Discipline that works with MacsBug to provide a higher level of error checking. What does it do, and does it work with the Symantec Debugger?

A: Discipline is a system extension that works with MacsBug to check the arguments passed to Toolbox routines. Discipline is built into MacsBug 6.5d12. To access it, you use the dcmd dizy.

Our debugger has not been tested thoroughly with Discipline. Therefore, it is possible that you may run into some incompatibilities. Discipline has a habit of revealing problems with many different programs including the Finder, which makes it difficult to use as a debugging tool.

Q: In UNIX there is a collection of routines, declared in curses.h that can be used to manipulate the cursor in a console-like display. In my Symantec C++ 8.0 project using the console window how can I achieve similar results?

A: Most of the functionality of the console window is declared in console.h. Here is an example of how to move the cursor to a specific point, and clear everything in the window from that point down.

#include <stdio.h>
#include <console.h> 

main()
{
 int i, ch, rows = 12, cols = 40;

 console_options.nrows = rows;
 console_options.ncols = cols;
 cshow( stdout );
 csetmode( C_NOECHO, stdout );
    // Set mode to C_NOECHO, so
    // getchar doesn’t move the
    // cursor.
 for( i=0; i<rows*cols; i++ )
 putchar( 'x' );
 cgotoxy( 5, 3, stdout );
 ch = getchar();
 ccleos( stdout );
}

Before the call to ccleos()

After the call to ccleos()

Q: I’m using the ToolBox call GetPicture() and I want to clean up the memory after I am done with the picture. How do I do that?

A: Pass the handle that GetPicture() returns to ReleaseResource(). Do not call DisposeHandle() on a handle to a resource or you may corrupt the resource map.

Q: When I try to use the QuickDraw global variables in my Symantec C++ 8.0 project I get undefined symbol errors. I’ve used the same globals many times before using 7.0 and it worked just fine. What is happening here?

A: With the introduction of Apple’s Universal Headers, access to the QuickDraw globals changed. Your 7.0 project was probably referring to the QuickDraw globals in the “old” style and using the original header files, not the Universal Headers. You will need to access the QuickDraw globals through the qd struct, defined in Quickdraw.h. i.e.:

CopyRgn(thePort->visRgn, thePort->clipRgn);

would become

CopyRgn(qd.thePort->visRgn, qd.thePort->clipRgn);

Q: I have a large 8.0 project with many files and I frequently use the Find... command under the Search menu. Every time I use it I have to set up the find parameters each time. Is there a way to set default search parameters?

A: Yes! In your Symantec C++ folder there is a folder called (Scripts), inside which you will find a compiled script called Startup:

tell application "Symantec Project Manager"
 -- Set the default search state.
 set user search state to ¬
 {wrap around:true, ¬
  ignore case:true, ¬
  files to search:only sources, ¬
  exclude system:true, ¬
  exclude precompiled header:true}
end tell

You can set the default parameters for the find in the indexed list shown above.

Q: I get link errors with a class that has static data members. Why is this?

A: If you declare a class with static data members you need to initialize those data members in the global data space outside the class, so that memory is allocated for them. If you do not initialize the static variables in global data space outside the class then the compiler does not have a location for the static data members in memory. Thus, you get a link error when you attempt to access that variable. Example:

class A
{
public:
 static short x;
 static char  y;

 char z;
};

short A::x = 0;  // Note: These variables are initialized
char  A::y = 'a';// outside the class declaration in
    // order to allocate memory for them.

Q: The following code used to work (up through 8.0), but in 8.0.1 it doesn’t. Why?

class A
{
 friend class B;
public:
 A();
 ~A();
 B *GetFriend(int index);
};

class B
{
public:
 B();
 ~B();
 int index;
};

I get an error on line 7 “semicolon expected”. If I put friend before B *GetFriend(int index), it works. Is it a compiler bug, or is it a new ANSI rule of some kind that I didn’t know about?

A: A couple things are happening here:

First, the code above compiled in previous versions due to a compiler bug. 8.0.1 corrects this error. Basically, the syntax is wrong. The class A has no idea what B is yet, and thus the compiler complains. If you put a forward declaration, class B;, in front of the declaration of A this will compile fine.

Second, the statement friend B *GetFriend(int index) tells the compiler that GetFriend is a friend function, and therefore has access to A’s protected and private members. The statement B *GetFriend(int index) tells the compiler that GetFriend is a member function of A. In both cases the friend class B does nothing more than allow all members of B access to A’s private and protected members.

Q: I have made a floating window view in Visual Architect, but when I go to attach it to a command, it does not appear in the list of views to open. How do I open it?

A: When you make a floating window view, VA derives a class from CFloatDirector; we will call it CMyFloatingWindow. You need to call OpenWind() to make the window appear (ShowWind() only undoes a HideWind()). The easiest way is to call it from within CMyFloatingWindow::MakeNewWindow(), right after the object is created; the window will appear immediately upon launch. To have it open from a command (i.e. menu or button), create the command by choosing Commands... from the Edit menu in VA. Enter the name for your command (e.g. cmdOpenMyFWindow), choose CApp from the In Class: popup menu and choose Call from the Do: popup menu.

Next, attach the command to the menu or button. If attaching to a menu: choose Menus... from the Edit menu, select the menu, click on Edit Menu Items, select the item and choose the command you created from the Command: popup menu. If attaching to a button: select the button in VA, get Pane Info from the Pane menu, open the CButton triangle and choose the command you created from the Command: popup menu.

Visual Architect will generate an empty function, DocmdOpenMyFWindow inside x_CApp.cp. Call OpenWind() from here.

Note: Calling from outside the CMyFloatingWindow requires that you have a pointer to the CMyFloatingWindow object. You can find this declared as a global in x_CApp.cp in the form:

 extern CAFloatingWindow  *gCAFloatingWindow; 

If you wish to make the call to OpenWind() from someplace other than x_CApp.cp, you must redeclare it (as above) and #include CMyFloatingWindow.h in the file where you want to use it.

Q: When I try to run the Symantec Debugger it quits with an error that says, “DebugServices cannot set trace bit.” How do I set the trace bit? I can’t find any options to set a trace bit in any of the project option debugging screens.

A: Most likely, you are running a Pre-System 7.5 operating system. You will need to put the items that are in the Pre-System 7.5 Additions folder into your system folder. The Pre-System 7.5 Additions folder is found in the Apple Software folder on your Symantec C++ 8.0 CD-ROM.

Bonus:

Q: I’m porting my code from 7.0.x to 8.0 and I get an “undefined symbol MBarHeight” when I try to compile. Why do I get a linker error?

A: With the introduction of Apple’s Universal Headers you can no longer access the variable MBarHeight directly. You will need to include LowMem.h and use LMGetMBarHeight(), and LMSetMBarHeight(), to access menu bar height. Access to other low memory variables has been changed in similar ways, so it’s a good idea to look in LowMem.h if you plan on using low memory variables.

Special Thanks To:

Glenn Austin, Mark Baldwin, Craig Conner, Rick Hartmann, Michael Hopkins, Steve Howard, Noah Lieberman, Andy McFarland, Chris Prinos, and Kevin Quah.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Apple Remote Desktop 3.9 - Remotely cont...
Apple Remote Desktop is the best way to manage the Mac computers on your network. Distribute software, provide real-time online help to end users, create detailed software and hardware reports, and... Read more
SoftRAID 5.5.6 - High-quality RAID manag...
SoftRAID allows you to create and manage disk arrays to increase performance and reliability. SoftRAID allows the user to create and manage RAID 4 and 5 volumes, RAID 1+0, and RAID 1 (Mirror) and... Read more
Apple Final Cut Pro X 10.3.2 - Professio...
Apple Final Cut Pro X is a professional video editing solution.Completely redesigned from the ground up, Final Cut Pro adds extraordinary speed, quality, and flexibility to every part of the post-... Read more
Logic Pro X 10.3.1 - Music creation and...
Logic Pro X is the most advanced version of Logic ever. Sophisticated new tools for professional songwriting, editing, and mixing are built around a modern interface that's designed to get creative... Read more
Paragraphs 1.1.4 - Writing tool just for...
Paragraphs is an app just for writers. It was built for one thing and one thing only: writing. It gives you everything you need to create brilliant prose and does away with the rest. Features... Read more
VueScan 9.5.70 - Scanner software with a...
VueScan is a scanning program that works with most high-quality flatbed and film scanners to produce scans that have excellent color fidelity and color balance. VueScan is easy to use, and has... Read more
TextSoap 8.3.2 - Automate tedious text d...
TextSoap can automatically remove unwanted characters, fix up messed up carriage returns, and do pretty much anything else that we can think of to text. Save time and effort. Be more productive. Stop... Read more
ForkLift 3.0 - Powerful file manager: FT...
ForkLift is a powerful file manager and ferociously fast FTP client clothed in a clean and versatile UI that offers the combination of absolute simplicity and raw power expected from a well-executed... Read more
Amazon Chime 4.0.5528 - Amazon-based com...
Amazon Chime is a communications service that transforms online meetings with a secure, easy-to-use application that you can trust. Amazon Chime works seamlessly across your devices so that you can... Read more
Sparkle 2.1.0 - $79.99
Sparkle 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

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 »
RPG Djinn Caster (Games)
RPG Djinn Caster 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: SPECIAL PRICE 38% OFF(USD 7.99 -> USD 4.99)!!!A Fantasy Action RPG of far foreign lands! Summon the Djinns and rise to... | Read more »
Alto's Odyssey gets its first trail...
There's finally video evidence of Alto's Odyssey, the follow up to the 2015 App Store hit, Alto's Adventure. It looks just as soothing and atmospheric as Alto's last outing, but this time players will be journeying to the desert. Whereas Alto's... | Read more »
Last week on Pocket Gamer
What’s going on in the wider world of portable gaming? Each week we ask that question of our sister website Pocket Gamer. The PG team covers iOS gaming, just like 148Apps, but it also strays into the world of Android games and handheld consoles... | Read more »
Pokémon GO Generation 2 evolution guide
At long last, Niantic Labs finally unleashed the Generation 2 Pokémon into the wild. Pokémon GO trainers are scrambling to grab up this new set of 80 Pokémon. There are some special new tricks required to catch all of these new beasties, though.... | Read more »
The best new games we played this week
It feels as though the New Year got off to a creaking start as far as mobile games go, but that's changed over the past few weeks. The last few days alone have seen the debut of a number of wonderful games, so we thought we'd take the time to... | Read more »
Recruit more scallywags and discover new...
Get ready to show off your sea legs all over again in Oceans & Empires’ new grand update, which aims to make the act of rising to the role of seven seas ruler even more fresh and appealing, thanks to a richness of new content on both iOS and... | Read more »

Price Scanner via MacPrices.net

QuickerTek Announces 5TB Apple AC AirPort Tim...
QuickerTek Inc. has announced their new 5TB hard drive upgrade for Apple’s AC AirPort Time Capsule. By customer request, this upgrade also features six external antennas and offers the highest... Read more
Apple Certified Refurbished iMacs available f...
Apple has Certified Refurbished 2015 21″ & 27″ iMacs available for up to $350 off MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: - 21″ 3.... Read more
Apple offering Certified Refurbished Series 1...
Apple is now offering Certified Refurbished Series 1 and Series 2 Apple Watches for 14-16% off MSRP, starting at $229. An Apple one-year warranty is included with each watch. Shipping is free: Series... Read more
1.4GHz Mac mini on sale for $449, save $50
B&H Photo has the 1.4GHz Mac mini on sale for $50 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP Read more
12-inch Retina MacBooks on sale for $200-$250...
Newegg has the 12″ 1.2GHz Space Gray Retina MacBook (sku MLH82LL/A) on sale for $1349.99 including free shipping. Their price is $250 off MSRP, and it’s the lowest price available for this model.... Read more
13-inch 2.0GHz Space Gray MacBook Pro on sale...
Adorama has the non-Touch Bar 13″ 2.0GHz Space Gray MacBook Pro in stock today for $100 off MSRP. Shipping is free, and Adorama charges NY & NJ sales tax only: - 13″ 2.0GHz MacBook Pro Space Gray... Read more
13-inch Touch Bar MacBook Pros on sale for $1...
B&H Photo has select 2016 Apple 13″ Touch Bar MacBook Pros in stock today and up to $100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.9GHz/512GB Touch Bar MacBook... Read more
KSI-1802R SX Disinfect-able Keyboard With Wav...
KSI has unveiled a new, innovative medical keyboard, the KSI-1802R SX, at HIMSS 2017, running February 19-22 in Orlando, Florida. KSI-1802R SX is the only keyboard that combines dual factor... Read more
15-inch Touch Bar MacBook Pros on sale for up...
Amazon has 15″ Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP including free shipping: - 15″ 2.7GHz Touch Bar MacBook Pro Space Gray: $2720.38 $79 off MSRP - 15″ 2.7GHz... Read more
Apple’s Education discount saves up to $300 o...
Purchase a new Mac or iPad using Apple’s Education Store and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free: -... Read more

Jobs Board

*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
*Apple* Technician - nfrastructure (United S...
Let’s Work Together Apple Technician This position is based in Portland, ME Life at nfrastructure At nfrastructure, we understand that our success results from our Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.