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

BBEdit 11.6.6 - Powerful text and HTML e...
BBEdit is the leading professional HTML and text editor for the Mac. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a... Read more
Brackets 1.9.0 - Open Source Web design...
Brackets is an Open-Source editor for Web design and development built on top of Web technologies such as HTML, CSS, and JavaScript. The project was created and is maintained by Adobe, and is... Read more
Audio Hijack 3.3.4 - Record and enhance...
Audio Hijack (was Audio Hijack Pro) drastically changes the way you use audio on your computer, giving you the freedom to listen to audio when you want and how you want. Record and enhance any audio... Read more
Tunnelblick 3.7.1a - GUI for OpenVPN.
Tunnelblick is a free, open source graphic user interface for OpenVPN on OS X. It provides easy control of OpenVPN client and/or server connections. It comes as a ready-to-use application with all... Read more
Amazon Chime 4.3.5721 - 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
Posterino 3.3.7 - Create posters, collag...
Posterino offers enhanced customization and flexibility including a variety of new, stylish templates featuring grids of identical or odd-sized image boxes. You can customize the size and shape of... Read more
Airmail 3.2.9 - Powerful, minimal email...
Airmail is an mail client with fast performance and intuitive interaction. Support for iCloud, MS Exchange, Gmail, Google Apps, IMAP, POP3, Yahoo!, AOL, Outlook.com, Live.com. Airmail was designed... Read more
Arq 5.8.4 - Online backup to Google Driv...
Arq is super-easy online backup for Mac and Windows computers. Back up to your own cloud account (Amazon Cloud Drive, Google Drive, Dropbox, OneDrive, Google Cloud Storage, any S3-compatible server... Read more
Microsoft Remote Desktop 8.0.39 - Connec...
With Microsoft Remote Desktop, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help... Read more
Arq 5.8.4 - Online backup to Google Driv...
Arq is super-easy online backup for Mac and Windows computers. Back up to your own cloud account (Amazon Cloud Drive, Google Drive, Dropbox, OneDrive, Google Cloud Storage, any S3-compatible server... Read more

Latest Forum Discussions

See All

Thimbleweed Park officially headed to iO...
Welp, it's official. Thimbleweed Park will be getting a mobile version. After lots of wondering and speculation, the developers confirmed it today. Thimbleweed Park will be available on both iOS and Android sometime in the near future. There's no... | Read more »
Pokémon GO might be getting legendaries...
The long-awaited legendary Pokémon may soon be coming to Pokémon GO at long last. Data miners have already discovered that the legendary birds, Articuno, Moltres, and Zapdos are already in the game, it’s just a matter of time. [Read more] | Read more »
The best deals on the App Store this wee...
If you’ve got the Monday blues we have just the thing to cheer you up. The week is shaping up to be a spectacular one for sales. We’ve got a bunch of well-loved indie games at discounted prices this week along with a few that are a little more... | Read more »
Honor 8 Pro, a great choice for gamers
Honor is making strides to bring its brand to the forefront of mobile gaming with its latest phone, the Honor 8 Pro. The Pro sets itself apart from its predecessor, the Honor 8, with a host of premium updates that boost the device’s graphical and... | Read more »
The 4 best outdoor adventure apps
Now that we're well into the pleasant, warmer months, it's time to start making the most of the great outdoors. Spring and summer are ideal times for a bit of trekking or exploration. You don't have to go it alone, though. There are plenty of... | Read more »
Things 3 (Productivity)
Things 3 3.0.1 Device: iOS iPhone Category: Productivity Price: $7.99, Version: 3.0.1 (iTunes) Description: Meet the all-new Things! A complete rethinking of the original, award-winning task manager – with a perfect balance between... | Read more »
Oddball mash-up Arkanoid vs Space Invade...
In a move no one was really expecting, Square Enix has put forth an Arkanoid/Space Invaders mash-up aptly titled Arkanoid vs Space Invaders. The game launched today on both iOS and Android and the reviews are actually quite good. [Read more] | Read more »
Arkanoid vs Space Invaders (Games)
Arkanoid vs Space Invaders 1.0 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0 (iTunes) Description: LAUNCH SALE: GET THE GAME AT 20% OFF! Two of the most iconic classic games ever made meet in Arkanoid vs Space... | Read more »
The best new games we played this week
Things got off to a bit of a slow start this week, but as we steadily creep towards Friday a bunch of great games have started cropping up. If you're looking for a quality new release to play this weekend, we've got you covered. Here's a handy... | Read more »
No Stick Shooter (Games)
No Stick Shooter 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Happy Robot presents a fresh take on the classic retro-arcade shooters we all know and love. Featuring 30 levels of non-stop... | Read more »

Price Scanner via MacPrices.net

touchbyte Releases PhotoSync 3.2 for iOS With...
Hamburg, Germany based touchbyte has announced the release of PhotoSync 3.2 for iOS, a major upgrade to the versatile and powerful app to transfer, backup and share photos and videos over the air.... Read more
Emerson Adds Touchscreen Display and Apple Ho...
Emerson has announced the next evolution of its nationally recognized smart thermostat. The new Sensi Touch Wi-Fi Thermostat combines proven smarthome technology with a color touchscreen display and... Read more
SurfPro VPN for Mac Protects Data While Offer...
XwaveSoft has announced announce the release and immediate availability of SurfPro VPN 1.0, their secure VPN client for macOS. SurfPro VPN allows Mac users to protect their internet traffic from... Read more
13-inch Touch Bar MacBook Pros on sale for $1...
B&H Photo has 13″ MacBook Pros in stock today for up to $150 off MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: - 13″ 2.9GHz/512GB Touch Bar MacBook Pro Space Gray (... Read more
Tuesday deal: $200 off 27-inch Apple iMacs
Amazon has select 27″ iMacs on sale for $200 off MSRP, each including free shipping: - 27″ 3.3GHz iMac 5K: $2099 $200 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $1799 $200 off MSRP Keep an eye on our... Read more
Five To Six Million 10.5-inch iPad Pro Tablet...
Digitimes’ Siu Han and Joseph Tsai report that upstream supply chain shipments for Apple’s new 10.5-inch iPad Pro have been increasing, with monthly shipment volume expected to hit 600,000 units by... Read more
Georgia Tech Students Win Toyota and Net Impa...
Earlier this year, a team of students at Georgia Tech realized that there was a critical gap in transportation services for people who use wheelchairs, and wondered if the solution could be in the... Read more
13-inch 2.0GHz Space Gray MacBook Pro on sale...
Amazon has the 13″ 2.0GHz Space Gray non-Touch Bar MacBook Pro (MLL42LL/A) on sale for $1299.99 including free shipping. Their price is $200 off MSRP, and it’s currently the lowest price available... Read more
Roundup of 15-inch MacBook Pro sale prices, m...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $200 off MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: - 15″ 2.7GHz... Read more
15-inch 2.2GHz Retina MacBook Pro on sale for...
B&H Photo has the 2015 15″ 2.2GHz Retina MacBook Pro (MJLQ2LL/A) on sale for $1849 including free shipping plus NY & NJ sales tax only. Their price is $150 off MSRP. Read more

Jobs Board

*Apple* Technical Support - Atrilogy (United...
Our direct client is looking for an Apple Technical Support / Apple Help Desk Specialist for a Full Time Direct Hire role in West Los Angeles by Playa Vista, CA Read more
*Apple* Media Products - Commerce Engineerin...
Apple Media Products - Commerce Engineering Manager Job Number: 57037480 Santa Clara Valley, California, United States Posted: Apr. 18, 2017 Weekly Hours: 40.00 Job Read more
Director *Apple* Platform, IS Data Manageme...
…a real difference. Come, shine with us! Astellas is announcing a Director Apple Platform, IS Data Management Lead opportunity in Northbrook, IL. Purpose & Scope: Read more
Director *Apple* ERP Integration Lead - Ast...
…make a real difference. Come, shine with us! Astellas is announcing a Director Apple ERP Integration Lead opportunity in Northbrook, IL. Purpose & Scope: This role Read more
Associate Director *Apple* Platform -- SAP...
…real difference. Come, shine with us! Astellas is announcing a Associate Director Apple Platform -- SAP Security, Risks and Controls Lead opportunity in Northbrook, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.