TweetFollow Us on Twitter

Text Views
Volume Number:7
Issue Number:7
Column Tag:Jörg's Folder

Text Views and Forth News

By Jörg Langowski, MacTutor Editorial Board

“Multiple text views in MacApp”

First, I’d like to give the Forth users among you some good news and some bad news. The bad news first. Mach2 doesn’t work with System 7.0, and I can’t get hold of Palo Alto Shipping. If anyone of you out there knows how to contact them, if they’re still alive, etc., please drop me a note (Netland: langowski@frembl51.bitnet or langowski@embl-heidelberg.de, Applelink: langowski.j).

The good news is about Neon, the OOP Forth implementation by Kriya Systems. You might remember that Bob Loewenstein from the University of Chicago recently managed to persuade Kriya Systems to put Neon into the public domain - under the name of Yerk. Well, since then he has not been asleep and has made some improvements, right now we’re at Yerk version 3.3.2. Instructions on how to obtain the Yerk files are in the letter that arrived recently over E-Mail:

From:

Bob Loewenstein <rfl@ODDJOB.UCHICAGO.EDU>

Subject: yerk 3.3.2 upgrade

An upgraded version of Yerk, the Object Oriented Forth for the Mac, is available for anonymous ftp on oddjob.uchicago.edu, in directory ~ftp/pub/Yerk.

If you already have version 3.3.0, you need only ftp the ‘upgrade.sit.hqx’ file. If you do not have a previous version, ftp the complete package in file ‘yerk3.3.2.sit.hqx’. The manual has not been changed.

The basic changes from 3.3.0 are:

COSMETIC CHANGES

- revised bold fonts in // so 9 pt chicago not loaded

- class window now erases grow box when grown

- now cursor is erased with delete key if +curs is set

- slight cosmetic change to (.mod)

- slight change stop: timer

- ?lines changed in nuc to keep bottom line on screen

and grow: method in window changed to send current

line to bottom if grow shortened window.

BUG FIXES

- modified savesig

- added negate: to class Int

- fixed slight bug in decompile (for floats)

- fixed to: problem in pathList source for sarray (file

pathlist)

- some changes to Install Module..it still does not

create a stand-alone application, but does reset

dictionary and stack sizes

- slot manager traps now correct

I would appreciate a note from anyone who intends to seriously use this development system. Future upgrades will be forthcoming, and any reasonable suggestions will most likely be included in such upgrades.

Bob Loewenstein

Dept. of Astronomy and Astrophysics

University of Chicago

Yerkes Observatory

Williams Bay, Wisconsin 53191

414-245-5555

As usual, I’d be glad to help those who have difficulty downloading the Yerk source over the network. Drop me a line at one of my E-mail addresses.

The second good news comes from Michael Hore (Australia), of Mops fame (Mops = Michael’s object programming system). To remind you: Michael re-implemented Neon on top of a subroutine-threaded Forth kernel, with lots of inline code and other optimizations. A couple of days ago, his letter arrived:

Dear Jörg,

I was really please with the glowing report you gave about Mops in MacTutor of Oct last year. Several people in various parts of the world have since contacted me for copies of Mops. This is to let you know that I am just putting the finishing touches to Mops 2.0, and expect it to be available in a couple of weeks now. Actually I am aiming to have it available by the time Apple releases System 7, but I think I might beat them to it (wouldn’t be too hard, would it?) [well, it seems once in a while Apple gets something out on a deadline - which has been pushed far enough, however. I remember MacHack 1989 when they were taking bets when System 7 was going to be released, Fall 89 or Spring 90, etc - JL].

With Kriya’s release of the source code of Neon, I am now free to offer Mops to anyone, not just Neon users. Although to really make it accessible to non-Neon users I should probably write a manual (ugh!).

Actually I note that the text of Kriya’s letter to Bob Loewenstein says that Neon is released for “scientific and educational purposes All commercial distribution rights are reserved by Kriya Systems, Inc.” This, of course, isn’t exactly public domain. It means that if a non-Neon owner wanted to do something commercial in Mops, and Mops still contained any of Kriya’s source code, I would have to negotiate a separate agreement with Kriya, somehow

Still, to be realistic, I doubt that any non-Neon owner would want to use it for a commercial project at this stage, although there is a Neon owner here in Australia who is going to use it commercially. Eventually there will be none of Kriya’s code left, and then there will be no problem. The nucleus and most of the standard system stuff is original right now - only the language itself is closely derived from Neon, and my understanding of the legalities is that a language, as such, isn’t copyrightable.

Anyway, this release will have quite a number of improvements:

• Mops will be fully System 7 friendly. All the new system calls will be available through the normal Call xxxx syntax. (I’ve discovered, incidentally, that Neon won’t run under System 7 - there’s a problem with the way it resizes itself in memory on startup).

• Up to 24 named parameters/local variables. This used to be 6 in Neon, 5 in Mops.

• The Assembler will support the 68881/2 FPU instructions.

• Mops already has Neon-compatible floating point - in the new version, FP words test a flag for the presence of an FPU, and if it is present, these words bypass SANE. This gives around a 400% speedup. Mops will also optionally compile inline optimized FPU code. If this mode is selected, up to 6 floating point named parameters or locals will be kept in the FPU registers. This results in some rather swift floating-point code (10 to 20 times faster than SANE). This is probably as quick as anything on the Mac, if not quicker.

• No limit on dictionary size.

When this version is available I’ll send you a copy, which you can distribute [Sure will! - JL] or whatever. As always, anyone who sends me two blank disks will get a copy (or if they put something else useful on the disks, I won’t complain).

Yours sincerely,

Michael Hore

(c/o MAF, P.O. Box 821, Nhulunbuy, NT 0880, Australia)

So you see, the OOP Forth scene for the Mac isn’t anything like dead, but quite a few exciting things are still happening! If you are using any of those systems and have an idea for an article, I’d really appreciate your contributions.

Multi-box text editor

Now let’s go back to C++, MacApp, and this month’s main subject. We’ll extend the simple editor from the May column to accommodate several boxes containing some text, of different style. We also want a border drawn around each box, and the window in which the text boxes are displayed should be scrollable (you notice that with these additions we come closer to adding a ‘text box’ capability to our drawing example).

Anything that is to be scrolled in a MacApp window will be contained in a scroller view (class TScroller). This time we shall create the scroller from a view template that we define with ViewEdit; the scroller will contain two subviews of class TTEBox. This class is derived from the standard class TTEView. It implements its own Draw method which draws a box around the view, and a DoMouseCommand method which handles mouse clicks in the view.

The latter method is important for selecting the text box which will receive the keystrokes typed by the user; clicking in one text box should select that box (this is not an automatic feature of TTEView, but has to be programmed).

The Draw method (Listing 2) gets the extent rectangle of the view in QuickDraw format, and calls FrameRect, and the superclass Draw method. DoMouseCommand simply sends the SetTarget(this) message to the window enclosing the view, which means that keystrokes and DoIdle messages will be sent to this text view.

For the scroller enclosing the text boxes, we also derive a new class from TScroller, TEditView. This allows us to save references to the enclosed TTEBox objects (two in our case) in instance variables - you never know what you’ll be able to use them for. The only new method that we define for TEditView is IEditView, which initializes the print handler and the new instance variables, and sets the window’s target to the second text box (just for the fun of it).

The application’s class is TEditor. The constructor method of this class initializes the application and generates a new window containing the views as defined in a resource file that has been created by ViewEdit. The resource is ‘view’, ID=1002. This view contains one instance of TEditView, with identifier ‘scrl’, which in turn contains two instances of TTEBox as subviews, with identifiers ‘tx01’ and ‘tx02’.

Writing code like this where instances of views are generated from templates at run time requires some attention. If the class is never referenced explicitly in the source code, either by generating an instance using new, or by calling one of its methods, the linker will think that class’ code isn’t used and doesn’t need to be included in the application. Running the application will then generate an error message, because the code required to initialize the new object can’t be found anywhere. We therefore have to include dummy references to TEditView and TTEBox, to make sure we can instantiate the objects at run time. This is done in the code starting with if (gDeadStripSuppression) {}. Finally, we initialize the newly generated TEditView.

How do we generate the templates for our view in ViewEdit? First of all, we draw a TScroller of a certain size. We check the box ‘Top view in TWindow’ to indicate that the view is contained in a window, and then click on the button ‘TWindow parameters ’. This will open a dialog where we can set the window size. It should be 15 pixel bigger than the TScroller in either direction, to accommodate the scroll bars. Returning to the ViewEdit window, we double-click on the TScroller box, opening the dialog for the TScroller parameters. Here, we have to set the two size determiners to ‘sizeRelSuperView’, in order to make the scroll bars grow and shrink with the window. Finally, we find a text box where we can enter the class name. By default, this will be the name of the standard view that we generated (TScroller in this case). Entering another name here allows us to generate an object of a class derived from TScroller. Thus, here we enter TEditView, the name of our derived class. The view identifier, by default ‘VW01’, can be changed, too; I chose ‘scrl’.

Finally, we draw two TTEView boxes inside our TEditView (drawing them inside automatically makes them subviews), and change their class names to TTEBox, and the view identifiers to ‘tx01’ and ‘tx02’. We save the resource file and are ready to go. The view resource that I just described is contained on the source code disk as ‘editor.rsrc’.

We’re done; building the application will now create a program that displays one window, scrollable in both directions, in which two text edit boxes are displayed. Clicking on one of them allows you to enter text there. We’ll continue this example and see how we can add disk read/write; till then.

Listing 1: editor.h

class TEditor : public TApplication {
public:
 pascal TEditor(OSType itsMainFileType);
 pascal void HandleFinderRequest();
#ifdef qDebug
 virtual pascal void IdentifySoftware();
#endif
};

class TEditView : public TScroller {
public:
 TTEView*fTEView1;
 TTEView*fTEView2;
 pascal void IEditView(TWindow *itsWindow);
};

class TTEBox : public TTEView {
public:
 pascal void Draw(Rect *area);
 pascal struct TCommand 
 *DoMouseCommand(Point *theMouse,
 EventInfo *info, Point *hysteresis);
};
Listing 2: editor.cp

#include <UMacApp.h>
#include <UPrinting.h>
#include <UTEView.h>
#include <Fonts.h>
#include <ToolUtils.h>

#include “editor.h”

const OSType kSignature   = ‘JLMT’;
const OSType kFileType    = ‘JL01’;
const int kWindowID= 1002;

pascal TEditor::TEditor(OSType itsMainFileType)
{
 TWindow*aWindow;
 TEditView*aEditView;
 TTEBox *aTEBox;
 
 IApplication(itsMainFileType);

 aWindow = NewTemplateWindow(kWindowID,nil);
 FailNIL(aWindow);
 
 if (gDeadStripSuppression)
 {
 aEditView = new TEditView;
 aTEBox = new TTEBox;
 }

 aEditView = 
 (TEditView*) aWindow->FindSubView(‘scrl’);
 FailNIL(aEditView);
 aEditView->IEditView(aWindow);
 
 aWindow->Open();
}

pascal void TEditor::HandleFinderRequest()  {};

#ifdef qDebug
pascal void TEditor::IdentifySoftware()
{
 ProgramReport
 (“\pEditor ©J.Langowski/MacTutor May 1991”,false);
 inherited::IdentifySoftware();
}
#endif

pascal void TEditView::IEditView(TWindow *itsWindow)
{
 TStdPrintHandler*aStdPrintHandler;
 
 aStdPrintHandler = new TStdPrintHandler;
 FailNIL(aStdPrintHandler);
 aStdPrintHandler->IStdPrintHandler
 (nil,this,kSquareDots,kFixedSize,!kFixedSize);
 fPrintHandler = aStdPrintHandler;

 fTEView1 = 
 (TTEView*) itsWindow->FindSubView(‘tx01’);
 FailNIL(fTEView1);
 fTEView2 = 
 (TTEView*) itsWindow->FindSubView(‘tx02’);
 FailNIL(fTEView2);
 
 itsWindow->SetTarget(fTEView2);
}

pascal void TTEBox::Draw(Rect *area)
{
 Rect itsQDExtent;
 
 PenNormal();
 GetQDExtent(&itsQDExtent);
 FrameRect(&itsQDExtent);
 inherited::Draw(area);
}

pascal struct TCommand 
 *TTEBox::DoMouseCommand(Point *theMouse,
 EventInfo *info, Point *hysteresis)
{
 if (Focus())
   {  GetWindow()->SetTarget(this); }

 return inherited::DoMouseCommand
 (theMouse,info,hysteresis);
}

TEditor *gEditor;

int main()
{
 InitToolBox();
 if (ValidateConfiguration(&gConfiguration))
 {
 InitUMacApp(8);
 InitUPrinting();
 InitUTEView();
 gEditor = new TEditor(kFileType);
 FailNIL(gEditor);
 gEditor->Run();
 }
 else StdAlert(phUnsupportedConfiguration);
 return 0;
}
Listing 3: editor.r

/* editor.r 
 Rez file for MacTutor C++/MacApp Editor example
 J. Langowski May 1991
*/

#ifndef __TYPES.R__
#include “Types.r”
#endif

#ifndef __SYSTYPES.R__
#include “SysTypes.r”
#endif

#ifndef __MacAppTypes__
#include “MacAppTypes.r”
#endif

#ifndef __ViewTypes__
#include “ViewTypes.r”
#endif

#if qDebug
include “Debug.rsrc”;
#endif

include “MacApp.rsrc”;
include “Printing.rsrc”;

include “Defaults.rsrc” ‘SIZE’(-1);
include “Defaults.rsrc” ‘ALRT’(phAboutApp);
include “Defaults.rsrc” ‘DITL’(phAboutApp);
include “Defaults.rsrc” ‘cmnu’(mApple);
include “Defaults.rsrc” ‘cmnu’(mEdit);
include “Defaults.rsrc” ‘cmnu’(mBuzzWords);

include “Editor” ‘CODE’;

include “editor.rsrc”;

#define kSignature ‘JLMT’
#define kDocFileType ‘JL01’
#define getInfoString“©1991 J.Langowski/MacTutor. “

/* ------------------------------------------------------------------------*/

resource ‘cmnu’ (2) {
 2,
 textMenuProc,
 allEnabled,
 enabled,
 “File”,
  {
 “Close”, noIcon, noKey, noMark, plain, 31;
 “-”, noIcon, noKey, noMark, plain, nocommand;
 “Page Setup ”, 
 noIcon, noKey, noMark, plain, 176;
 “Print One”, noIcon, “P”, noMark, plain, 177;
 “Print ”, noIcon, noKey, noMark, plain, 178;
 “-”, noIcon, noKey, noMark, plain, nocommand;
 “Quit”, noIcon, “Q”, noMark, plain, 36
 }
};


resource ‘MBAR’ (kMBarDisplayed,purgeable) 
{
 {mApple; 2; mEdit;}
};


/*--------------------------------------------------------------------------
 The overall package version
----------------------------------------------------------------------------*/
RESOURCE ‘vers’ (2,
#if qNames
“Package Version”,
#endif
 purgeable) {
 0x02,
 0x00,
 beta,
 0x06,
 verUs,
 “2.0”,
 “MacApp® 2.0, ©Apple Computer, Inc. 1990”
};


/*--------------------------------------------------------------------------
 The revision of this particular file
--------------------------------------------------------------------------*/
RESOURCE ‘vers’ (1,
#if qNames
“File Version”,
#endif
 purgeable) {
 0x01,
 0x00,
 beta,
 0x05,
 verUs,
 “Editor”,
 “v 0.9, ©JL/MacTutor 1991”
};

/* =========== debug window ============ */
resource ‘dbug’ (kDebugParamsID,
#if qNames
“Debug”,
#endif
 purgeable) {
 {350, 4, 474, 636}, /* Bounding rect for debug window */
 1,   /* Debug window font rsrc ID (normal = monaco) */
 9,/* Debug window font size (normal = 9) */
 100, /* Number of lines */
 100, /* Width of lines in characters */
 true,  /* open initially */
 “Jörg’s Debug Window”  /* Window title */
};

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Vivaldi 1.9.818.44 - An advanced browser...
Vivaldi is a browser for our friends. In 1994, two programmers started working on a web browser. Our idea was to make a really fast browser, capable of running on limited hardware, keeping in mind... Read more
Skim 1.4.29 - PDF reader and note-taker...
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file. Skim includes many features and has a... Read more
1Password 6.7.1 - Powerful password mana...
1Password is a password manager that uniquely brings you both security and convenience. It is the only program that provides anti-phishing protection and goes beyond password management by adding Web... Read more
FontExplorer X Pro 6.0.2 - Font manageme...
FontExplorer X Pro is optimized for professional use; it's the solution that gives you the power you need to manage all your fonts. Now you can more easily manage, activate and organize your... Read more
VOX 2.8.24 - 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
OmniPlan 3.7.1 - Robust project manageme...
With OmniPlan, you can create logical, manageable project plans with Gantt charts, schedules, summaries, milestones, and critical paths. Break down the tasks needed to make your project a success,... Read more
Dropbox 24.4.17 - Cloud backup and synch...
Dropbox is an application that creates a special Finder folder that automatically syncs online and between your computers. It allows you to both backup files and keep them up-to-date between systems... Read more
WhatsApp 0.2.4238 - Desktop client for W...
WhatsApp is the desktop client for WhatsApp Messenger, a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for... Read more
SteerMouse 5.1 - Powerful third-party mo...
SteerMouse is an advanced driver for USB and Bluetooth mice. It also supports Apple Mighty Mouse very well. SteerMouse can assign various functions to buttons that Apple's software does not allow,... Read more
OmniPlan Pro 3.7.1 - Professional-grade...
With OmniPlan Pro, you can create logical, manageable project plans with Gantt charts, schedules, summaries, milestones, and critical paths. Break down the tasks needed to make your project a success... Read more

Latest Forum Discussions

See All

Fire Emblem Heroes event announces new m...
As reported yesterday, Nintendo was gearing up a live press event for their popular mobile game,Fire Emblem Heroes. While the stream revealed a lot of new things, the event was entirely in Japanese. Luckily we have a rundown of what was announced... | Read more »
Best games we played this week
Another week, another slate of new mobile games. Although there weren't as many big name releases as last week, there were plenty of unique video game titles that came out that's sure to keep you interested over the weekend. Everything from classic... | Read more »
Olli by Tinrocket (Photography)
Olli by Tinrocket 1.0 Device: iOS iPhone Category: Photography Price: $2.99, Version: 1.0 (iTunes) Description: Get drawn in with Olli by TinrocketOlli instantly turns your everyday moments into hand-drawn art and animations. • Watch... | Read more »
Penarium (Games)
Penarium 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: | Read more »
Fire Emblem Heroes is way more profitabl...
Profits for Nintendo's mobile game Fire Emblem Heroes are apparently impressive enough to beat out other Nintendo titles likeSuper Mario Run, despite having 10 times fewer downloads. [Read more] | Read more »
Classic series Robot Unicorn Attack 3 no...
The classic Adult Swim browser game, Robot Unicorn Attack, branched off into a series of popular mobile games. Now, the latest entry into the series, Robot Unicorn Attack 3, is available for iOS and Android mobile devices. [Read more] | Read more »
Sudoku Sweeper (Games)
Sudoku Sweeper 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: A minimalist mashup of Minesweeper and Sudoku. Logic puzzle perfection. Every row, column and zone contains a bomb and one of... | Read more »
Under Leaves (Games)
Under Leaves 1.0.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0.0 (iTunes) Description: Journey into the forest, the jungle or the depths of the deep blue sea. Find chestnuts for the pigs, a caterpillar for the... | Read more »
Ninja Pizza Girl (Games)
Ninja Pizza Girl 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: In the not-so-distant future, rampart traffic congestion has resulted in only one way to deliver pizzas across town in thirty... | Read more »
SCRAP (Games)
SCRAP 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: That day, for no apparent reason, SCRAP decided to wake up and run. He had to, because his activation was a mistake the "Factory" could... | Read more »

Price Scanner via MacPrices.net

15-inch 2.7GHz Space Gray Touch Bar MacBook P...
B&H Photo has the 15″ 2.7GHz Space Gray Touch Bar MacBook Pro in stock today and on sale for $2599…$200 off MSRP. Shipping is free, and B&H charges NY & NJ sales tax only: - 15″ 2.7GHz... Read more
13-inch 2.9GHz/256GB Space Gray Touch Bar Mac...
B&H Photo has the 13″ 2.9GHz/256GB Space Gray Touch Bar MacBook Pro in stock today and on sale for $150 off MSRP including free shipping plus NY & NJ sales tax only: - 13″ 2.9GHz/256GB Touch... Read more
21-inch iMacs on sale for up to $151 off MSRP
B&H Photo has 21″ iMacs on sale for up to $151 off MSRP, each including free shipping plus NY sales tax only: - 21″ 3.1GHz iMac 4K: $1348 $151 off MSRP - 21″ 2.8GHz iMac: $1199.99 $100 off MSRP... Read more
Weekend deal: Up to $420 off new MacBook Pros...
Apple has Certified Refurbished 2016 15″ and 13″ MacBook Pros available for $230 to $420 off original MSRP. An Apple one-year warranty is included with each model, and shipping is free: - 15″ 2.6GHz... Read more
Price drop: 15-inch 2.2GHz Retina MacBook Pro...
Amazon has dropped their price on 15″ 2.2GHz Retina MacBook Pros (MJLQ2LL/A) to $1709.99 including free shipping. Their price is $290 off MSRP for this model. Note that stock may sell out quickly at... Read more
2.8GHz Mac mini on sale for $899, save $100
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
Check Apple prices on any device with the iTr...
MacPrices is proud to offer readers a free iOS app (iPhones, iPads, & iPod touch) and Android app (Google Play and Amazon App Store) called iTracx, which allows you to glance at today’s lowest... Read more
New System Clock for macOS by B-Eng Now Avail...
Fehraltorf, Switzerland based B-Eng has announced the release and immediate availability of System Clock, the company’s new system monitor and information app developed exclusively for macOS. System... Read more
DEVONtechnologies Celebrates 15th Anniversary...
DEVONtechnologies celebrates its 15th company anniversary with a 30% discount on all its software products from May 1st through 5th, 2017. In spring 2002, DEVONtechnologies opened its website and... Read more
WaterField Designs Invites Customers to Help...
San Francisco based WaterField Designs invites customers and air travelers to participate in developing the next generation in-flight travel case, the Air Porter. Frustrated with limited legroom,... Read more

Jobs Board

*Apple* Mac Computer Technician - GeekHampto...
…complex computer issues over the phone and in person? GeekHampton, Long Island's Apple Premium Service Provider, is looking for you! Come work with our crew Read more
*Apple* Mobile Master - Best Buy (United Sta...
**501505BR** **Job Title:** Apple Mobile Master **Location Number:** 000849-Gurnee-Store **Job Description:** **What does a Best Buy Apple Mobile Master do?** At Read more
Best Buy *Apple* Computing Master - Best Bu...
**498428BR** **Job Title:** Best Buy Apple Computing Master **Location Number:** 000293-Rockville-Store **Job Description:** **What does a Best Buy Apple Read more
*Apple* Mac Computer Technician - GeekHampto...
…complex computer issues over the phone and in person? GeekHampton, Long Island's Apple Premium Service Provider, is looking for you! Come work with our crew Read more
*Apple* Retail - Multiple Positions- Chicago...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.