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

GraphicConverter 10.5.4 - $39.95
GraphicConverter is an all-purpose image-editing program that can import 200 different graphic-based formats, edit the image, and export it to any of 80 available file formats. The high-end editing... Read more
Dash 4.1.3 - Instant search and offline...
Dash is an API documentation browser and code snippet manager. Dash helps you store snippets of code, as well as instantly search and browse documentation for almost any API you might use (for a full... Read more
Microsoft OneNote 16.9 - Free digital no...
OneNote is your very own digital notebook. With OneNote, you can capture that flash of genius, that moment of inspiration, or that list of errands that's too important to forget. Whether you're at... Read more
DEVONthink Pro 2.9.17 - Knowledge base,...
Save 10% with our exclusive coupon code: MACUPDATE10 DEVONthink Pro is your essential assistant for today's world, where almost everything is digital. From shopping receipts to important research... Read more
OmniGraffle 7.6 - Create diagrams, flow...
OmniGraffle helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use Graffle to... Read more
iFinance 4.3.7 - Comprehensively manage...
iFinance allows you to keep track of your income and spending -- from your lunchbreak coffee to your new car -- in the most convenient and fastest way. Clearly arranged transaction lists of all your... Read more
Opera 50.0.2762.58 - High-performance We...
Opera is a fast and secure browser trusted by millions of users. With the intuitive interface, Speed Dial and visual bookmarks for organizing favorite sites, news feature with fresh, relevant content... Read more
Microsoft Office 2016 16.9 - Popular pro...
Microsoft Office 2016 - Unmistakably Office, designed for Mac. The new versions of Word, Excel, PowerPoint, Outlook and OneNote provide the best of both worlds for Mac users - the familiar Office... Read more
SoftRAID 5.6.4 - 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
OmniGraffle Pro 7.6 - Create diagrams, f...
OmniGraffle Pro helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use... Read more

Latest Forum Discussions

See All

Around the Empire: What have you missed...
Around this time every week we're going to have a look at the comings and goings on the other sites in Steel Media's pocket-gaming empire. We'll round up the very best content you might have missed, so you're always going to be up to date with the... | Read more »
The 7 best games that came out for iPhon...
Well, it's that time of the week. You know what I mean. You know exactly what I mean. It's the time of the week when we take a look at the best games that have landed on the App Store over the past seven days. And there are some real doozies here... | Read more »
Popular MMO Strategy game Lords Mobile i...
Delve into the crowded halls of the Play Store and you’ll find mobile fantasy strategy MMOs-a-plenty. One that’s kicking off the new year in style however is IGG’s Lords Mobile, which has beaten out the fierce competition to receive Google Play’s... | Read more »
Blocky Racing is a funky and fresh new k...
Blocky Racing has zoomed onto the App Store and Google Play this week, bringing with it plenty of classic kart racing shenanigans that will take you straight back to your childhood. If you’ve found yourself hooked on games like Mario Kart or Crash... | Read more »
Cytus II (Games)
Cytus II 1.0.1 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0.1 (iTunes) Description: "Cytus II" is a music rhythm game created by Rayark Games. It's our fourth rhythm game title, following the footsteps of three... | Read more »
JYDGE (Games)
JYDGE 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: Build your JYDGE. Enter Edenbyrg. Get out alive. JYDGE is a lawful but awful roguehate top-down shooter where you get to build your... | Read more »
Tako Bubble guide - Tips and Tricks to S...
Tako Bubble is a pretty simple and fun puzzler, but the game can get downright devious with its puzzle design. If you insist on not paying for the game and want to manage your lives appropriately, check out these tips so you can avoid getting... | Read more »
Everything about Hero Academy 2 - The co...
It's fair to say we've spent a good deal of time on Hero Academy 2. So much so, that we think we're probably in a really good place to give you some advice about how to get the most out of the game. And in this guide, that's exactly what you're... | Read more »
Everything about Hero Academy 2: Part 3...
In the third part of our Hero Academy 2 guide we're going to take a look at the different modes you can play in the game. We'll explain what you need to do in each of them, and tell you why it's important that you do. [Read more] | Read more »
Everything about Hero Academy 2: Part 2...
In this second part of our guide to Hero Academy 2, we're going to have a look at the different card types that you're going to be using in the game. We'll split them up into different sections too, to make sure you're getting the most information... | Read more »

Price Scanner via MacPrices.net

Apple restocked Certified Refurbished 13″ Mac...
Apple has restocked a full line of Certified Refurbished 2017 13″ MacBook Airs starting at $849. An Apple one-year warranty is included with each MacBook, and shipping is free: – 13″ 1.8GHz/8GB/128GB... Read more
How to find the lowest prices on 2017 Apple M...
Apple has Certified Refurbished 13″ and 15″ 2017 MacBook Pros available for $200 to $420 off the cost of new models. Apple’s refurbished prices are the lowest available for each model from any... Read more
The lowest prices anywhere on Apple 12″ MacBo...
Apple has Certified Refurbished 2017 12″ Retina MacBooks available for $200-$240 off the cost of new models. Apple will include a standard one-year warranty with each MacBook, and shipping is free.... Read more
Apple now offering a full line of Certified R...
Apple is now offering Certified Refurbished 2017 10″ and 12″ iPad Pros for $100-$190 off MSRP, depending on the model. An Apple one-year warranty is included with each model, and shipping is free: –... Read more
27″ iMacs on sale for $100-$130 off MSRP, pay...
B&H Photo has 27″ iMacs on sale for $100-$130 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 27″ 3.8GHz iMac (MNED2LL/A): $2199 $100 off MSRP – 27″ 3.... Read more
2.8GHz Mac mini on sale for $899, $100 off MS...
B&H Photo has the 2.8GHz Mac mini (model number MGEQ2LL/A) on sale for $899 including free shipping plus NY & NJ sales tax only. Their price is $100 off MSRP. Read more
Apple offers Certified Refurbished iPad minis...
Apple has Certified Refurbished 128GB iPad minis available today for $339 including free shipping. Apple’s standard one-year warranty is included. Their price is $60 off MSRP. Read more
Amazon offers 13″ 256GB MacBook Air for $1049...
Amazon has the 13″ 1.8GHz/256B #Apple #MacBook Air on sale today for $150 off MSRP including free shipping: – 13″ 1.8GHz/256GB MacBook Air (MQD42LL/A): $1049.99, $150 off MSRP Read more
9.7-inch 2017 WiFi iPads on sale starting at...
B&H Photo has 9.7″ 2017 WiFi #Apple #iPads on sale for $30 off MSRP for a limited time. Shipping is free, and pay sales tax in NY & NJ only: – 32GB iPad WiFi: $299, $30 off – 128GB iPad WiFi... Read more
Wednesday deal: 13″ MacBook Pros for $100-$15...
B&H Photo has 13″ #Apple #MacBook Pros on sale for up to $100-$150 off MSRP. Shipping is free, and B&H charges sales tax for NY & NJ residents only: – 13-inch 2.3GHz/128GB Space Gray... Read more

Jobs Board

*Apple* Store Leader - Retail District Manag...
Job Description: Job Summary As more and more people discover Apple , they visit our retail stores seeking ways to incorporate our products into their lives. It's Read more
Sr. Experience Designer, Today at *Apple* -...
# Sr. Experience Designer, Today at Apple Job Number: 56495251 Santa Clara Valley, California, United States Posted: 18-Jan-2018 Weekly Hours: 40.00 **Job Summary** Read more
Security Applications Engineer, *Apple* Ret...
# Security Applications Engineer, Apple Retail Job Number: 113237456 Santa Clara Valley, California, United States Posted: 17-Jan-2018 Weekly Hours: 40.00 **Job Read more
*Apple* Solutions Consultant - Apple (United...
# Apple Solutions Consultant Job Number: 113384559 Brandon, Florida, United States Posted: 10-Jan-2018 Weekly Hours: 40.00 **Job Summary** Are you passionate about Read more
Art Director, *Apple* Music + Beats1 Market...
# Art Director, Apple Music + Beats1 Marketing Design Job Number: 113258081 Santa Clara Valley, California, United States Posted: 05-Jan-2018 Weekly Hours: 40.00 Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.