TweetFollow Us on Twitter

Dec 95 Top 10
Volume Number:11
Issue Number:12
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 Craig Conner

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

This month, we are going to answer some questions about using the TCL class CStyleText with Visual Architect. A project demonstrating CStyleText is available on either CompuServe or America Online, or on ftp.devtools.symantec.com.

Q: How do I create a CStyleText pane in Visual Architect?

A: Since this class does not appear in the VA Base Class popup in the Classes dialog you cannot override it in the standard way. You can, however, create a class based on CEditText and use CStyleText as a Library Class.

To review how library classes work: Usually, VA produces x_class classes derived from the class specified in the Base Class popup menu. When you use a Library Class, VA bases the x_class on the library class and assumes the library class is derived from the base class.

Creating a class in this fashion causes VA to generate an x_class derived from CStyleText, which in turn is based on CEditText, so everything is right with the world. You can then assign this class to a panorama created with the normal panorama tool, not the EditText-like tool, which is actually a CDialogText pane.

Note: For the rest of this article, I will refer to this view with the name TextPane (real original, huh?) and the class as CStyledTextEditPano, for short. I also call the document class CStyledDoc, and the application class CStyleApp.

Q: I have problems aligning the pane into the window correctly. What is the best way to set this up?

A: The easy way to set up a pane or panorama to completely cover a window is to adjust the bounds using the edit boxes. You will want to overlap the pane one pixel on each side. For example, when I look in the View Info dialog for my project, it lists the Width as 471 and Height as 443. So my CStyleText panorama is positioned at (-1, -1), and has a Width of 473 and a Height of 445.

Q: How do I set up the Font, Style and Size menus?

A: The Add Menu popup for the Menu Bar dialog box contains pre-created Font, Size and Style menus. Add these menus to the current menu bar. The Style menu has commands associated with each menu item, so TCL will take care of changing styles for the current selection. Both the default Font and Size menus are empty, so we will have to add items programmatically.

To add items we must override CApplication::SetUpMenus(), and then we revert to standard Macintosh Toolbox practices to add items. For example:

 void CStyleApp::SetUpMenus()
{
    // To handle standard initialization.
 CApplication::SetUpMenus();

    // Add the system fonts the standard way
 AddResMenu(GetMHandle(MENUfont), 'FONT');

 MenuHandle sizeMenuH = GetMHandle(MENUsize);

    // I’ve got other things planned, so we might as well 
    // account for that possibility now
 short numItems = CountMItems(sizeMenuH);

 InsMenuItem(sizeMenuH, "\p9", numItems + 1);
 
    // Similarly for other sizes...

    // Now deal with keeping items highlighted and uncheck all items   
    // when Update menus called for ease of dealing with at that time.
 gBartender -> SetDimOption(MENUfont, dimNone);
 gBartender -> SetUnchecking(MENUfont, TRUE);

    // do the same for MENUsize and MENUstyle...
}

These Font and Style menus do not have commands
associated with them because of the generic way TCL handles font and size changes. Look in CAbstractText::DoCommand() and CTextStyleTask::Do() for more information.

Having added and configured the menus, we now have to handle checking the correct menu item when the menus are displayed. We do this in the CStyledDoc::UpdateMenus(), like so:

CStyledDoc::UpdateMenus()
{
 short whichAttributes = doFont | doSize | doFace;
 TextStyle theStyle;
 Str255 itemString;
 short fontNumber;
 long fontSize;
 short count;
 
 inherited::UpdateMenus();
 
 MenuHandle fontMenu = GetMHandle(MENUfont);
 count = CountMItems(fontMenu);
 
 for (int n = 1; n <= count; n++)
 {
 GetItem(fontMenu, n, itemString);
 GetFNum(itemString, &fontNumber);
 
 if(fontNumber == theStyle.tsFont)
 CheckItem(fontMenu, n, TRUE);
 }

 
 MenuHandle sizeMenu = GetMHandle(MENUsize);
 count = CountMItems(sizeMenu);
 
 for (n = 3; n <= count; n++)
 {
 GetItem(sizeMenu, n, itemString);
 StringToNum(itemString, &fontSize);
 
 if(fontSize == theStyle.tsSize)
 CheckItem(sizeMenu, n, TRUE);
 }

    // handle easy case first
 if (theStyle.tsFace == normal)
 gBartender->CheckMarkCmd(cmdPlain, TRUE);
 else
 {
    // Turn on the correct ones
 if(theStyle.tsFace & bold)
 gBartender->CheckMarkCmd(cmdBold, TRUE);
 
    // similarly for italic, underline, etc.
 } 
}

Q: What happens if I want to use a different font size than what is in the menu?

A. Well, we can add an Other menu item to the Size menu in VA, and for correctness there should be a line between this item and the font sizes, so add one of those too. These need to be at the top of the menu, so TCL does not lose track of where it is in the menu. (All items with commands need to appear in menus before items without commands associated with them.)

Create a modal dialog view that has a DialogText item in it, so we can have the user enter the size. The item should be set to be of type CIntegerText. You should also set a range in the Pane Info dialog under CIntegerText, for example from 4 to 256. Also check the showRangeOnErr checkbox to inform the user if they make a mistake. (It’s the Macintosh Way.)

Now to complete the VA part of this, create a cmdOtherSize and associate it with the Other menu item. Have the command generate code to open the newly created dialog in the CStyleText derived class.

Next, we have to add code to handle the size change. We add this to an override of ProviderChanged() in CStyledTextEditPano:

 if(reason == kFontSizeDialogEnding)
 {
 long size;
 size = ((CFontSizeDialogData *)info)
  -> fPointSizeDialog_PointSizeEditText;
 
    // To fake out the CStyleText operations and handle a 
    // non-menu item size, we throw a new item into the menu and
    // call the command, then delete menu item
 long theCmd = (MENUsize << 16) + 3;
 Str255 string;
 
 NumToString(size, string);
 gBartender->InsertMenuCmd
 (theCmd, string, MENUsize, 2);
 
    // negate the command, so TCL knows it does not have an
    // associated command and send it.
 DoCommand(-theCmd);

 gBartender->RemoveMenuCmd(theCmd);
 }
 else
 inherited::ProviderChanged(aProvider,reason,info);

Q: After generating and compiling, why isn’t the cursor in the pane when I open a view?

A: Currently, the gopher is assigned to theMainPane of the window. To associate the gopher with the style text pane, we can re-assign it:

       
       itsGopher = fTextPane_StyleTextPano;

Do this at the end of CStyleDoc::ContentsToWindow().

Q: How do I save and read in a styled text document?

A: Saving a styled text document requires saving the text, and saving the style of that text. An easy way to do this is to use the CSimpleSaver class. In VA, make CSimpleSaver a library class for CStyledDoc. You will also need to override ReadContents() and WriteContents() (they can have empty bodies) in CStyledDoc to complete the class definition.

You can save the text using the CDataFile object member of CStyledDoc, itsFile. To save the style of the text, we need to save it into a 'styl' resource with the ID number 128. This is the standard location for style information. To save into the resource you can create a CResFile object.

Add something like this to

CStyledDoc::ContentsToWindow():

 if(itsFile)
 {
    // Deal with the text first
 Handle text = 
 fTextPane_StyleTextPano->GetTextHandle();
 ((CDataFile *)itsFile)->WriteAll(text);
 
    // And now deal with the style info
 FSSpec theSpec;

 itsFile->GetFSSpec(&theSpec);
 
 CResFile theResFile;
 
 theResFile.SpecifyFSSpec(&theSpec);

 if(!theResFile.HasResFork())
 theResFile.CreateNew('ttxt','TEXT');

 theResFile.Open(fsRdWrPerm);
 
 Handle theStyle, newStyle;
 
 theStyle = GetResource('styl', 128);
 
    // as per IM:Text p. 2-52 with a little TCL thrown in
 long savedStart, savedEnd;

 fTextPane_StyleTextPano->
 GetSelection(&savedStart, &savedEnd);
 
 (*fTextPane_StyleTextPano->macTE)->selStart = 0;
 (*fTextPane_StyleTextPano->macTE)->selEnd = 
 fTextPane_StyleTextPano->GetLength();
 
 newStyle = (Handle)fTextPane_StyleTextPano ->
 GetTheStyleScrap();
 
 (*fTextPane_StyleTextPano->macTE)->selStart =
 savedStart;
 (*fTextPane_StyleTextPano->macTE)->selEnd =
 savedEnd;
 
 HLock(theStyle);
 HLock(newStyle);
 
 if(theStyle)
 {
 long len = GetHandleSize(newStyle);
 
 SetHandleSize(theStyle, len);

 BlockMove(*newStyle, *theStyle, len);
 
 ChangedResource((Handle)theStyle);
 WriteResource(theStyle);
 }
 else
 {
 AddResource(
 newStyle , 'styl', 128, "\ptext style"
 );
 WriteResource(newStyle);
 }

 HUnlock(theStyle);
 HUnlock(newStyle);
 
 theResFile.Update();
 }

Reading in a styled text document is basically the reverse of this, and left as an exercise for the reader.

Q: Why does the application crash when I try to open a currently open document?

A: In x_CStyledDoc::FailOpen(), you will see that it calls Failure() if the file is already open. You will want to override FailOpen() to open a dialog or otherwise handle the situation.

Q: How do I get the document to print?

A: TCL has code to handle this for you. Make sure you have the Print checkbox checked in the View Info dialog for the main window.

Q: When I print, why does it cut lines in half at the bottom of the page?

A: You have the fixedLineHeights checkbox checked in the Pane Info for the StyledText panorama. (I did not tell you to turn it off earlier because I would then have only nine questions.) Uncheck that and TCL will handle printing styled text correctly.

Q: When there is no current selection, changing the Font, Size, or Style menus do not affect what I type next. Why not?

A: TCL relies on the style of the current selection to set the menus when that information is needed. To change this behavior we need to create a data member of type TextStyle for our CStyledTextEditPano to save the menu choices. I called it theStyle. Then we need to save this information:

void CStyledTextEditPano::
 DoKeyDown(
 char theChar, Byte keyCode, EventRecord *macEvent
 )
{
 long selStart, selEnd;
 
 CStyleText::GetSelection(&selStart,&selEnd);
 
// The case we want to change behavior of
 if(selStart == selEnd)
 {
 short whichAttributes = doFont | doSize | doFace;
 GetTextStyle(&whichAttributes, &theStyle);
 }
 
 inherited::DoKeyDown(theChar, keyCode, macEvent);
}

and restore the correct style:

void CStyledTextEditPano::TypeChar(
 char theChar, short theModifers
)
{
 short whichAttributes = doFont | doSize | doFace;
 
 TESetStyle(
 whichAttributes, &theStyle, FALSE, macTE
 );
 
 inherited::TypeChar(theChar, theModifers);
}

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

VOX 2.8.30 - Music player that supports...
VOX just sounds better! The beauty is in its simplicity, yet behind the minimal exterior lies a powerful music player with a ton of features and support for all audio formats you should ever need.... Read more
Default Folder X 5.1.6b3 - Enhances Open...
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
CleanMyMac 3.8.6 - $39.95
CleanMyMac makes space for the things you love. Sporting a range of ingenious new features, CleanMyMac lets you safely and intelligently scan and clean your entire system, delete large, unused files... Read more
Postbox 5.0.17 - Powerful and flexible e...
Postbox is a new email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even... Read more
Amazon Chime 4.6.5852 - 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
coconutBattery 3.6.3 - Displays info abo...
With coconutBattery you're always aware of your current battery health. It shows you live information about your battery such as how often it was charged and how is the current maximum capacity in... Read more
VueScan 9.5.82 - 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
Thunderbird 52.3.0 - Email client from M...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more
Little Snitch 4.0.2 - Alerts you about o...
Little Snitch gives you control over your private outgoing data. Track background activity As soon as your computer connects to the Internet, applications often have permission to send any... Read more
Thunderbird 52.3.0 - Email client from M...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more

The best games we played this week - Aug...
Another busy week has come to a close. We played a lot of excellent games this week and now it's time to look back and reflect on some our favorites. Here are our picks for the week of August 18. [Read more] | Read more »
War Wings beginner's guide - how to...
War Wings is the newest project from well-established game maker Miniclip. It's a World War II aerial dogfighting game with loads of different airplane models to unlock and battle. The game offers plenty of single player and multiplayer action. We... | Read more »
How to win every 2v2 battle in Clash Roy...
2v2 is coming back to Clash Royale in a big way. Although it's only been available for temporary periods of time, 2v2 has seen a hugely positive fan response, with players clamoring for more team-based gameplay. Soon we'll get yet another taste of... | Read more »
Roll to Win with Game of Dice’s new upda...
Joycity’s hit Game of Dice gets a big new update this week, introducing new maps, mechanics, and even costumes. The update sets players loose on an exciting new map, The Cursed Tower, that allows folks to use special Runes mid-match. If you feel... | Read more »
Bottom of the 9th (Games)
Bottom of the 9th 1.0.1 Device: iOS iPhone Category: Games Price: $4.99, Version: 1.0.1 (iTunes) Description: Play the most exciting moment of baseball in this fast-paced dice and card game! | Read more »
The best apps for viewing the solar ecli...
If you somehow missed the news, many parts of the United States will be witness to a total solar eclipse on August 21 for the first time in over 90 years. It'll be possible to see the eclipse in at least some capacity throughout the continental U... | Read more »
The 5 best mobile survival games
Games like ARK: Survival Evolved and Conan Exiles have taken the world of gaming by storm. The market is now flooded with hardcore survival games that send players off into the game's world with nothing but maybe the clothes on their back. Never... | Read more »
Portal Walk (Games)
Portal Walk 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Portal Walk is adventure and relaxing platform game about Eugene. Eugene stuck between worlds and trying to find way back home.... | Read more »
Technobabylon (Games)
Technobabylon 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: City of Newton, 2087. Genetic engineering is the norm, the addictive Trance has replaced almost any need for human interaction,... | Read more »
5 reasons why 2v2 is the best mode in Cl...
Supercell has been teasing fans with 2v2 windows that allow players to team up for limited periods of time. The Summer of 2v2 was just this past July, but players are already clamoring for more of that sweet, sweet team-based action. The fans have... | Read more »

Price Scanner via MacPrices.net

Back To School With The Edge Desk All-in-one...
Back to school is just around the corner, and the ergonomically correct Edge Desk all-in-one portable kneeling desk is ideal for students living in dorms and small apartments, Edge Desk features:... Read more
Norton Core Secure Wi-Fi Router Now Available...
First introduced at the 2017 Consumer Electronics Show (CES), Norton Core, a secure, high-performance Wi-Fi router, fundamentally changed the concept of Wi-Fi routers by making security the primary... Read more
ViewSonic Adds New 27-inch 4K UHD Monitor to...
ViewSonic Corp. has introduced the VP2785-4K, a 27-inch 4K UHD (3840×2160) monitor that delivers precise and consistent color representation and performance to ensure incredible image quality. Built... Read more
Apple now offering Certified Refurbished 2017...
Apple is now offering Certified Refurbished 2017 27″ iMacs for up to $350 off original MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: – 27″ 3.... Read more
13-inch 2.3GHz MacBook Pros on sale for $100...
Amazon has the new 2017 13″ 2.3GHz MacBook Pros on sale today for $100 off MSRP, each including free shipping: – 13″ 2.3GHz/128GB Space Gray MacBook Pro (MPXQ2LL/A): $1199.99 $100 off MSRP – 13″ 2.... Read more
Clearance 2016 13-inch MacBook Airs available...
B&H Photo has clearance 2016 13″ MacBook Airs available for up to $200 off original MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: – 13″ 1.6GHz/128GB MacBook Air (MMGF2LL... Read more
Clearance 21-inch and 27-inch iMacs available...
B&H Photo has clearance 21″ and 27″ Apple iMacs available for up to $500 off original MSRP, each including free shipping plus NY & NJ sales tax only: – 27″ 3.3GHz iMac 5K: $1799 $500 off... Read more
New iOS 11 Productivity Features Welcome But...
The iOS community is in late summer holding mode awaiting the September arrival of the iPhone 8 and iOS 11. iOS 11 public betas have been available for months — number six was released this week —... Read more
Samsung Electronics Launches New Portable SSD...
Samsung Electronics America, Inc. has announced the launch of Samsung Portable SSD T5 – its newest portable solid state drive (PSSD) that raises the bar for the performance of external memory... Read more
TrendForce Reports YoY Gain of 3.6% for 2Q17...
Market research firm TrendForce reports that the global notebook shipments for this second quarter registered a sequential quarterly increase of 5.7% and a year-on-year increase of 3.6%, totaling 39.... Read more

Jobs Board

Development Operations and Site Reliability E...
Development Operations and Site Reliability Engineer, Apple Payment Gateway Job Number: 57572631 Santa Clara Valley, California, United States Posted: Jul. 27, 2017 Read more
Frameworks Engineering Manager, *Apple* Wat...
Frameworks Engineering Manager, Apple Watch Job Number: 41632321 Santa Clara Valley, California, United States Posted: Jun. 15, 2017 Weekly Hours: 40.00 Job Summary Read more
Development Operations and Site Reliability E...
Development Operations and Site Reliability Engineer, Apple Payment Gateway Job Number: 57572631 Santa Clara Valley, California, United States Posted: Jul. 27, 2017 Read more
Frameworks Engineering Manager, *Apple* Wat...
Frameworks Engineering Manager, Apple Watch Job Number: 41632321 Santa Clara Valley, California, United States Posted: Jun. 15, 2017 Weekly Hours: 40.00 Job Summary Read more
Business Development Manager - *Apple* Medi...
Job Summary Apple Music is a single, intuitive app that...- all in one place. You can stream any Apple Music song, playlist or album, and download it Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.