TweetFollow Us on Twitter

Mar 97 Top 10

Volume Number: 13 (1997)
Issue Number: 3
Column Tag: Symantec Top Ten

Symantec Top 10

By Richard Hill, Symantec Technical Support

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

Q: My Visual Architect project uses a modal dialog that I want to be able to make appear and disappear without repeatedly allocating and releasing resources. How would I do this?

A: While not immediately obvious, the answer to this is fairly simple. Since CDialog and CDLOGDialog are descendants of CWindow, you can use CWindow's member functions Hide() and Show() to control visibility. To make the dialog ‘go away' without releasing its resources use myDialog->Hide(). Whether it is visible or not, you can update its contents to your liking. Re-display it at the appropriate time with myDialog->Show().

Q: My Symantec C++ Project will not run under the debugger. What might be the problem?

A: There are a couple different reasons for this problem. The most common culprit is corruption in one of your built objects. Choosing Remove Objects from the Build menu is the easiest way to deal with this offender. Another less common (but just as obtrusive) condition has to do with the Project Type setting in the Project | Options submenu. If either Shared or Static Library is selected for the project type, the debugger will be disabled for this project. If the type has been erroneously set to a library, set it back to Application and then Remove Objects from the Build menu. All should be well.

Q: My loop control condition in C is not evaluating correctly. I know x has reached 10, but control is staying in the loop. What's going on?

while (x>10)

{

x = x/y + ...;

}

A: The problem here has to do with rounding and floating point precision. Try this instead:

while (abs(x-10) > 0.0000001)

Obviously, you can change the precision level by changing how many decimal places to use.

Q: My Java applet is accessing an SQL database through dbANYWHERE. The data in my result set is acting weird. Among other things, my comparisons are not evaluating they way I know they should.

A: As it turns out, some SQL databases return their data padded to the length of the field (as defined in the database) plus 1 character (the delimiter). Luckily, Sun included a trim() method in the java.lang.String class. If the database you are connecting to returns padded strings, get in the habit of calling myString = myString.trim().

Q: I want to use a String as my conditional but (myString == the text) is not evaluating true when I know it should.

A: The problem here is that Java defines a String as an object, not a primary data type. You can still do what you want, you just have to use the String member function .equals(). Try this instead: if (myString.equals("the text") {}. This will evaluate to true when it should.

Q: I really love Symantec C++ and think it is the best development environment around, but I have to do some development using libraries that only exist for Metrowerks CodeWarrior . What can I do?

A: Rest at ease. We have developed a translator that allows you to use the MW libraries transparently with your Symantec C++ projects. The translator should be available at our WWW site (ftp.symantec.com) by the time this goes to print.

Q: I have been using Symantec Café (developer release) for some time now. I just upgraded my Mac and now Café will not compile anything. What is going on?

A: If you just copied the Symantec Café folder from one drive to another, rather than reinstalling on the new drive, you may be having a problem with an alias. In the (Translators) folder there is an alias called Java. This alias needs to be pointing to the Java file in your (Java Libraries) folder. If it is not, your project will refuse to compile.

Q: I want to be able to display my source code in an html file, but when I try I lose my formatting, and it makes the code very difficult to read.

A: Try copy and pasting your nicely formatted text from your editor window into a Visual Page window. Now select your code in the Visual Page window and select Preformatted from the Format menu. This method will retain all of your formatting and is the method we use here at Symantec. Another way to accomplish something similar is to drag a source code file to a Visual Page window. However, you may lose some formatting information like fonts and color using this method. It depends on whether your editor saves the formatting information in the file or determines it ‘on the fly'.

Q: How can I change the transparency setting of an image in Visual Page?

A: There are two ways to get to the right place for this. One is to Open the graphic image from the File menu. The quicker method is to hold down the Option key while double clicking on the displayed image. Either way will take you to an editing view for the image. Here you can choose what color (if any) to make transparent. You can define your imagemap regions and links here as well.

Q: I can not get my Java application to access a files that I know are on my drive. What is wrong?

A: Many Macintosh users are in the habit of naming their folders with a suffix of ‘ƒ' (Option-f). Unfortunately, the character set that Java supports for its paths does not include this character (among others). If you are having problems with folder or file access, check to see if any of the folders have any unusual characters and remove them.

Special Thanks to Mark Baldwin, Bob Meyer, Steve Howard, Kevin Kenan, and Steve Wolf.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

How to win big in Slots Deluxe
Cheating while gambling is illegal and morally wrong, and in some parts of the world it leads to men with names like Vinnie "Six Knuckles" Manchenzo beating you to a pulp in a dark alley. [Read more] | Read more »
How to take over the world in Dictator 2
Running a country isn't easy - especially when you're a dictator who wants to take over the world and crush everyone in your path while you do it. [Read more] | Read more »
Tips and tricks to get a higher score in...
Tank.iois - you guessed it! - another multiplayer arena battler likeAgar.io and Slither.io. It does differentiate itself by putting you in a tiny tank though, so it's not exactly the same. To help you get that all-important high score, we've got a... | Read more »
How to unlock characters in One Tap Tenn...
As the title suggests, One Tap Tennis requires only a single tap to play its particular brand of tennis, and rewards you with a ton of unlockable characters if you perform well. Fortunately for you, we at 148Apps have got a few tips and tricks to... | Read more »
Grab it now: Game Craft’s Legend of War...
The real time strategy game is now available for you to sink your teeth into, through the App Store and Google Play. Combining elements of skill, strategy and empire building, Legend of War is a real gamers’ game. [Read more] | Read more »
Skateboard Party 3 ft. Greg Lutzka (Gam...
Skateboard Party 3 ft. Greg Lutzka 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Skateboard Party is back! This third edition of the popular sports franchise features professional skater... | Read more »
Cubious (Games)
Cubious 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: Cubious – How smart are you? How high is your IQube? Solve the impossible puzzles to find out, and help a lost little cube find his... | Read more »
Goat Simulator Waste of Space (Games)
Goat Simulator Waste of Space 1.1 Device: iOS Universal Category: Games Price: $4.99, Version: 1.1 (iTunes) Description: ** IMPORTANT - SUPPORTED DEVICESiPhone 4S, iPad 2, iPod Touch 5 or better.** | Read more »
Wildfulness - Unwind in nature and calm...
Wildfulness - Unwind in nature and calm your mind with nature sounds and illustrations 1.0 Device: iOS Universal Category: Healthcare & Fitness Price: $1.99, Version: 1.0 (iTunes) Description: Spending time in nature helps you to... | Read more »
Dr. Panda Racers (Education)
Dr. Panda Racers 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: STEP ON THE GAS, RACE AND WIN!Fasten your seat belts and get ready to race! Speed your way to the finish line while doing... | Read more »

Price Scanner via MacPrices.net

Enterprise Workers Pick Technology Over Perks...
New Adobe study shows surprising attitudes about office jobs and where the future of work is heading. Adobe has released survey findings revealing that a surprising 70 percent of U.S. office workers... Read more
Goal Zero and OtterBox Partner to Expand iPh...
Goal Zero, specialists in portable power, have announced a partnership with OtterBox, brand smartphone case protection, to offer the Slide and Slide Plus Batteries as modules compatible with the new... Read more
15-inch Retina MacBook Pros on sale for up to...
B&H Photo has 15″ Retina MacBook Pros on sale for up to $210 off MSRP. Shipping is free, and B&H charges NY tax only: - 15″ 2.2GHz Retina MacBook Pro: $1799 $200 off MSRP - 15″ 2.5GHz Retina... Read more
Clearance 2015 13-inch MacBook Airs available...
B&H Photo has clearance 2015 13″ MacBook Airs available for $250 off original MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 1.6GHz/4GB/128GB MacBook Air (MJVE2LL/A): $799... Read more
Apple refurbished Apple TVs available for up...
Apple has Certified Refurbished 32GB and 64GB Apple TVs available for up to $30 off the cost of new models. Apple’s standard one-year warranty is included with each model, and shipping is free: -... Read more
21-inch iMacs on sale for up to $120 off MSRP
B&H Photo has 21″ iMacs on sale for up to $120 off MSRP including free shipping plus NY sales tax only: - 21″ 3.1GHz iMac 4K: $1379.99 $120 off MSRP - 21″ 2.8GHz iMac: $1189 $110 off MSRP - 21″ 1... Read more
Kanex Introduces GoPower USB-C Rechargeable B...
Kanex has announced its GoPower USB-C portable battery for the USB-C MacBook, featuring the new industry standard connector and cable used for connectivity and power. Providing users with a new... Read more
Convertible and Detachable Devices Winning Ov...
According to the latest figures published by International Data Corporation (IDC), Western European shipments of ultraslim convertibles and detachables posted positive growth (44.7%) to account for... Read more
New MacBook Pros And Will MacBook Air Be Upgr...
With my mid-2013 13-inch MacBook Air closing on its third anniversary come November, I’m in system upgrade mode. Actually the Haswell CPU equipped Air is still doing a fine job, but my good wife is... 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, and... Read more

Jobs Board

*Apple* Project Engineer - Smart Source Inc...
SmartSource is in need of an Apple Project Engineer for a 12 month contract opportunity in Pittsburg, PA. Role: Apple Project Engineer Location: Pittsburg, PA Read more
Automotive Sales Consultant - Apple Ford Linc...
…you. The best candidates are smart, technologically savvy and are customer focused. Apple Ford Lincoln Apple Valley is different, because: $30,000 annual salary Read more
Service Assistant - *Apple* Chevrolet *App...
Apple Automotive is one of the fastest growing dealer...and it shows. Consider making the switch to the Apple Automotive Group today! At Apple Automotive, we Read more
Editor, *Apple* News - APPLE (United States...
Job Summary The Apple News team is looking for a passionate and knowledgeable editor with experience covering entertainment/pop culture and experience running social Read more
*Apple* Nissan Service Technicians - Apple A...
Apple Automotive is one of the fastest growing dealer...and it shows. Consider making the switch to the Apple Automotive Group today! At Apple Automotive , Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.