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

The beginner's guide to Warbits
Warbits is a turn-based strategy that's clearly inspired by Nintendo's Advance Wars series. Since turn-based strategy games can be kind of tricky to dive into, see below for a few tips to help you in the beginning. Positioning is crucial [Read... | Read more »
How to upgrade your character in Spellsp...
So you’ve mastered the basics of Spellspire. By which I mean you’ve realised it’s all about spelling things in a spire. What next? Well you’re going to need to figure out how to toughen up your character. It’s all well and good being able to spell... | Read more »
5 slither.io mash-ups we'd love to...
If there's one thing that slither.io has proved, it's that the addictive gameplay of Agar.io can be transplanted onto basically anything and it will still be good fun. It wouldn't be surprising if we saw other developers jumping on the bandwagon,... | Read more »
How to navigate the terrain in Sky Charm...
Sky Charms is a whimsical match-'em up adventure that uses creative level design to really ramp up the difficulty. [Read more] | Read more »
Victorious Knight (Games)
Victorious Knight 1.3 Device: iOS Universal Category: Games Price: $1.99, Version: 1.3 (iTunes) Description: New challenges awaits you! Experience fresh RPG experience with a unique combat mechanic, packed with high quality 3D... | Read more »
Agent Gumball - Roguelike Spy Game (Gam...
Agent Gumball - Roguelike Spy Game 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Someone’s been spying on Gumball. What the what?! Two can play at that game! GO UNDERCOVERSneak past enemy... | Read more »
Runaway Toad (Games)
Runaway Toad 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: It ain’t easy bein’ green! Tap, hold, and swipe to help Toad hop to safety in this gorgeous new action game from the creators of... | Read more »
PsyCard (Games)
PsyCard 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: From the makers och Card City Nights, Progress To 100 and Ittle Dew PSYCARD is a minesweeper-like game set in a cozy cyberpunk... | Read more »
Sago Mini Robot Party (Education)
Sago Mini Robot Party 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: -- Children's Technology Review Editor's Choice -- | Read more »
Egz – The Origin of the Universe (Games...
Egz – The Origin of the Universe 1.0.2 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0.2 (iTunes) Description: ►►► Special offer until 2nd may : get the game at 2.99€ instead of 3.99€ ! ◄◄◄ Egz is a mesmerizing mix... | Read more »

Price Scanner via MacPrices.net

Mac minis on sale for up to $100 off MSRP
B&H Photo has Mac minis on sale for up to $100 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP - 2.6GHz Mac mini: $649 $50 off MSRP - 2.8GHz Mac mini... Read more
13-inch Retina MacBook Pros on sale for up to...
B&H Photo has 13″ Retina MacBook Pros on sale for $130-$200 off MSRP. Shipping is free, and B&H charges NY tax only: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1169 $130 off MSRP - 13″ 2.7GHz/... Read more
Apple price trackers, updated continuously
Scan our Apple Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the trackers continuously: - 15″... Read more
SanDisk Half-Terabyte SSD Optimized for Every...
SanDisk Corporation has announced the SanDisk Z410 SSD, a cost-competitive, half-terabyte solid state drive (SSD) that enables manufacturers to design for a broad range of desktop PCs and laptops.... Read more
Churchill Downs Racetrack Selects VenueNext t...
Churchill Downs Racetrack has announced an agreement with VenueNext to implement its technology platform for the start of Churchill Downs 2016 Spring Meet, which includes the 142nd running of the... Read more
Record 700 Million Pounds of CE Recycled in 2...
The Consumer Technology Association (CTA) reports that a record-setting 700 million pounds of consumer electronics (CE) have been recycled under the eCycling Leadership Initiative (ELI). According to... Read more
Price drops on clearance 12-inch Retina MacBo...
B&H Photo has dropped prices on leftover 2015 12″ Retina MacBooks with models now available starting at $999. Shipping is free, and B&H charges NY tax only: - 12″ 1.1GHz Gray Retina MacBook... Read more
15-inch Retina MacBook Pros available for $20...
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
Target offers Apple Watch Sport for $50 off M...
Target has Apple Watch Sports on sale for $50 off MSRP for a limited time. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary... Read more
Apple restocks Certified Refurbished Mac mini...
Apple has restocked Certified Refurbished 2014 Mac minis, with models available starting at $419. Apple’s one-year warranty is included with each mini, and shipping is free: - 1.4GHz Mac mini: $419 $... 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
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
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
Simply Mac *Apple* Specialist- Service Repa...
Simply Mac is the largest premier retailer of Apple products in the nation. In order to support our growing customer base, we are currently looking for a driven Read more
*Apple* Retail - Multiple Positions - Apple,...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.