TweetFollow Us on Twitter

Sep 89 Letters
Volume Number:5
Issue Number:9
Column Tag:Letters

Letters

By David E. Smith, Editor & Publisher, MacTutor

Another Way To Post Events

Matthew Snyder

Fairfield, CA

In reference to Joel McNamara’s article in the July issue, there’s another way to post command key events, but you wouldn’t know about it unless you’d read a somewhat obscure 1 page chapter in Inside Macintosh Vol. IV. PPostEvent posts an event just like PostEvent, but it “returns a pointer to the created queue entry.”

Here’s an example of its use. Like Joel, I needed to post an event and then fix the modifier field. This is an FKEY I wrote because too many times I found myself in a situation (like a dialog box) where ordinary paste did not work. Because the command and shift keys are down while the FKEY executes, just using PostEvent would result in all the posted events being command-shifted.

/* 1 */

#include<EventMgr.h>
#include <OSUtil.h>

main() {
 long length, offset;
 int index;
 char **tHandle;
 char *tPtr;
 EvQElPtr MyEventPtr;

if (TEGetScrapLen() > 0) {
 ZeroScrap();
 TEToScrap();
 }

tHandle = (char **) NewHandle(0);
length = GetScrap(tHandle, ‘TEXT’, &offset);
if (length > 0) {
 HLock(tHandle);
 tPtr = *tHandle;
 for (index = 0; index < length; index++) {
 PPostEvent((short) keyDown, (int) tPtr[index], &MyEventPtr);
 MyEventPtr_>evtQModifiers = 0;
 }
 }

DisposHandle(tHandle);
}

By the way, I very much liked Joel’s sentiment that as programmers we can rise above the mere end user; we’re not at the mercy of the “software gods.” It is a good feeling.

Take A Bow, Joel

I. Peter Sealy

New York, NY

I have just purchased a copy of MacTutor (June 1989) on the advice of the Lightspeed C user’s manual, and it has proved very valuable. I was especially impressed by Joel West’s “20 Steps to Printing Incompatibility” which explained maybe 50% of the problems we have had with the Mac. In particular, Excel’s infuriating refusal to work with anything but virgin memory (extremely annoying when you have an expensive 4MB sitting there vacant). More software houses should adopt Joel’s sensitivity to the amount of money that users have spent on their systems.

LSC vs. MPW

Andy Baird

Hightstown, NJ

Will Flor (“MPW vs. LSC,” MacTutor June 1989) is of course entitled to his opinions about the relative merits of MPW and Lightspeed C, but I had to laugh when he compared LSC to a tricycle and said “For very simple programs, perhaps LSC works adequately.” In case you’re unaware of it, Mr. Flor, a few of the “very simple” programs created with LSC are FoxBASE Mac, PageMaker and Digital Darkroom. If those are simple, I’d hate to see what you think is complex!

Hex Conversion

Temple M. Sarles

Nashua, NH

I enjoyed inputting and getting to run the “ADB Demo” for LS pascal 2.0 from your volume 5 number 3 in March 1989. Programs like these give dabblers like me some necessary insight into interfacing with the toolbox and really making things work.

It was a bit of a disappointment to find in procedure QuerySystem the line “str1 := concat(‘System Version (must convert to hex) = ‘, str2, chr(13));”. (emphasis added) Well, I did. Enclosed find the listing of a test program with the function ToHex which accepts a long integer and returns a string representing the value in hexadecimal. I think the code with its comments pretty well explains itself. There were two surprises. I idly tried a negative number, only to get unexpected results. I forgot that negative numbers are represented in two’s complement. An easy solution using the toolbox is presented in lines 21 & 22.

Not really solved is the need to make the string of hex digits a variable instead of a constant. If Hex_Char = ‘0123456789ABCDE’ is declared as a constant then line 27 ( , Hex_Char [Work + 1] ) gets a compile error of “Too many indices are being applied to a variable or expression.” The reason for this is not clear, but making it a string variable works well enough.

To apply this to ADB Demo, add function ToHex to MyADBStuff in the IMPLEMENTATION section ahead of procedure QuerySystem. In QuerySystem, replace the lines:

 NumToString(LongInt(theWorld.systemVersion), str2, chr(13));
 str1 := concat(‘System Version (must convert to hex) = ‘, str2, chr(13));

with:

{2}

 str2 := ToHex(LongInt(theWorld.systemVersion));  {convert to hex string}
 str2 := concat(copy(str2, 1, length(str2) - 2),
 ‘.’, copy(str2, length(str2) - 1, 2));{put in period}
 str1 := concat(‘System Version = ‘, str2, chr(13));

Appropriate credit should be given to Think Technology for their excellent implementation of Pascal and especially for their outstanding development environment (DEC & Apollo could take lessons).

{3}

program Test;    {Just a place to try things out}
 var
 T1: integer;    {The value as an integer}
 T2: string;{What it looks like as a string}

 function ToHex (Number_In: LongInt): string;      {This does the job}
 var
 Accumulate: string; {I never work into return value}
 Hex_Char: string; {The set of Hexadecimal digits}
 Shift: Integer; {Offset into the LongInt}
 Suppress_Zero: boolean;  
 {A switch to suppress leading zeroes}
 Work: LongInt;  {The clipped byte from the Number_In}

 begin
 Accumulate := ‘’; {Start with a blank string}
 Hex_Char := ‘0123456789ABCDEF’; 
 {Somehow this doesn’t work as a Const}
 Suppress_Zero := True; 
 {To start with suppress leading zeroes}

{First take care of sign bit, dispose of two’s complement }
{ and then deal with short three bit high-order hex number}

 if BitTst(@Number_In, 0) then{The sign bit is set!}
 begin
 Accumulate := ‘-’;
 Number_In := BitNot(Number_In); 
 {Two’s Complement cleared}
 Number_In := Number_In + $1
 {It’s always one shy - back to DP101}
 end;
 Work := BitShift(Number_In, 1);   
 {Bang to left  - IM/I-472}
 Work := BitShift(Work, -29); 
 {Back to right - IM/I-472}
 if Work > 0 then
 Accumulate := concat(Accumulate, Hex_Char[Work + 1]);

 Shift := 4;{Start with bit 5 - the 2nd digitd}
 repeat {Now a loop for the other 7 digitd}
 Work := BitShift(Number_In, shift); 
 {Bang to left  - IM/I-472}
 Work := BitShift(Work, -28); 
 {Back to right - IM/I-472}
 if Suppress_Zero then
 if Work > 0 then {The beginning of what we want}
 begin
 Suppress_Zero := False;  
 {A digit - No more leading zeroes}
 Accumulate := concat(Accumulate, Hex_Char[Work + 1])
 end
 else   {Don’t do anything!!}
 else
 Accumulate := concat(Accumulate, Hex_Char[Work + 1]);
 Shift := Shift + 4; {Move over one byte}
 until Shift = 32; {Bit 33 is out of bounds}

 ToHex := Accumulate {Put the result into return value}
 end;   {of function ToHex}

begin
 T1 := 1538;{A famous number now-a-days}
 T2 := ToHex(LongInt(T1));{Let’s see what it is}

{The next line inserts the period needed to make theWorld.systemVersion 
human readable}

 T2 := concat(copy(T2, 1, length(T2) - 2), ‘.’, copy(T2, length(T2) - 
1, 2));
 writeln(‘T1 = ‘, T1, ‘:  T2 = ‘, T2)
end.    {of program Test}

Fill Rectangle Tool

Kevin Parichan

Reedley, CA

In the article I wrote showing how to do the Spray Can and Paint Bucket tools I mentioned that there was a unit on GEnie that implemented these and other tools. That unit is no longer available, so I thought that I would give away the source for the standard filled rectangle tool. I rewrote the code in C so as to show that I don’t play favorites. With the routine given as is, you can easily modify it for ovals and round rectangles, filled or not. The routine uses the current grafport to get the fill pattern and the widths for the frame. Enjoy.

/* 4 */

#define NULL0L

Ptr NewBitMap(theBitMap,theRect)
   BitMap *theBitMap;
   Rect *theRect;
{
   theBitMap->rowBytes = ((theRect->right - theRect->left + 15) / 16) 
* 2;
   theBitMap->baseAddr = NewPtr(theBitMap->rowBytes * (theRect->bottom 
- theRect->top));
   theBitMap->bounds = *theRect;
   if (MemError() == noErr)
      return(theBitMap->baseAddr);
   return(NULL);
}

RectTool_Filled(where,workRect)
   Pointwhere;
   Rect *workRect;
{
   GrafPtrworkPort;
   BitMap workBits;
   PenState workState;
   BitMap oldBits,tempBits;
   Rect tempRect,theRect,aRect;
   PointnewLoc,pivot;
   long position;
   
   GetPort(&workPort);
   workBits = workPort->portBits;
   
   if (NewBitMap(&oldBits,workRect) == NULL)
      return;
   if (NewBitMap(&tempBits,workRect) == NULL)
   {
      DisposPtr(oldBits.baseAddr);
      return;
   }
   
   CopyBits(&workBits,&oldBits,workRect,workRect,srcCopy,NULL);
   
   tempRect = *workRect;
   tempRect.right = tempRect.right + 1;
   tempRect.bottom = tempRect.bottom + 1;
   
   GetPenState(&workState);
   PenNormal();
   PenSize(workState.pnSize.h,workState.pnSize.v);
   
   pivot = newLoc = where;
   SetRect(&theRect,where.h,where.v,where.h,where.v);
   
   while (Button()) {
      GetMouse(&newLoc);
      position = PinRect(&tempRect,newLoc);
      newLoc.v = HiWord(position);
      newLoc.h = LoWord(position);
      if (!EqualPt(newLoc,where))
      {
         Pt2Rect(newLoc,pivot,&theRect);
         Pt2Rect(where,pivot,&aRect);
         UnionRect(&theRect,&aRect,&aRect);
         CopyBits(&oldBits,&tempBits,workRect,workRect,srcCopy,NULL);
         SetPortBits(&tempBits);
         FillRect(&theRect,workState.pnPat);
         FrameRect(&theRect);
         SetPortBits(&workBits);
         CopyBits(&tempBits,&workBits,&aRect,&aRect,srcCopy,NULL);
         where = newLoc;
      }
   }
   
   DisposPtr(tempBits.baseAddr);
   DisposPtr(oldBits.baseAddr);
   SetPenState(&workState);
}

Stop The Press!

Kirk Chase

Anaheim, CA

Well, the Splitbar CDEF indicator dragging bug is fixed, thanks to Alexander S. Colwell of Redondo Beach, CA andMurat N. Konar of Minneapolis, MN. Each one suggests that the Quickdraw global DragPattern at $A34 should be stuffed with a gray pattern. Murat suggests this be done in the initialization procedure, and Alexander says in the doCalc procedure when the thumb region is requested.

It seems that the varialble is initialized to black instead of gray as the Window Manager implies in Inside Macintosh Vol. I on page 294 and 295. It states that " DragGrayRgn pulls a dotted (gray) outline of the region around " and "If you want the region's outline to be drawn in a pattern other than gray, you can store the pattern in the global varialbe DragPattern and then invoke the macro _DragTheRgn." But it looks as if the standard CDEF initializes the global even though we are told by Apple not to write to low memory globals. Oh, well. Hopefully this bug(?) will be fixed later on.

On a side note, I became a father for the first time on July 10, 1989 at 11:36 AM. My wife gave birth to a 5lb. boy named, "Brandon Lee Chase." I like to thank those, especially the staff at MacTutor, for putting up with me at this time. I would also like to thank my wife, Sylvia Lue, for putting up with me. I married simply the best.

 
AAPL
$99.76
Apple Inc.
+0.00
MSFT
$44.08
Microsoft Corpora
+0.00
GOOG
$520.84
Google Inc.
+0.00

MacTech Search:
Community Search:

Software Updates via MacUpdate

RestoreMeNot 2.0.3 - Disable window rest...
RestoreMeNot provides a simple way to disable the window restoration for individual applications so that you can fine-tune this behavior to suit your needs. Please note that RestoreMeNot is designed... Read more
Macgo Blu-ray Player 2.10.9.1750 - Blu-r...
Macgo Mac Blu-ray Player can bring you the most unforgettable Blu-ray experience on your Mac. Overview Macgo Mac Blu-ray Player can satisfy just about every need you could possibly have in a Blu-ray... Read more
Apple iOS 8.1 - The latest version of Ap...
The latest version of iOS can be downloaded through iTunes. Apple iOS 8 comes with big updates to apps you use every day, like Messages and Photos. A whole new way to share content with your family.... Read more
TechTool Pro 7.0.5 - Hard drive and syst...
TechTool Pro is now 7, and this is the most advanced version of the acclaimed Macintosh troubleshooting utility created in its 20-year history. Micromat has redeveloped TechTool Pro 7 to be fully 64... Read more
PDFKey Pro 4.0.2 - Edit and print passwo...
PDFKey Pro can unlock PDF documents protected for printing and copying when you've forgotten your password. It can now also protect your PDF files with a password to prevent unauthorized access and/... Read more
Yasu 2.9.1 - System maintenance app; per...
Yasu was originally created with System Administrators who service large groups of workstations in mind, Yasu (Yet Another System Utility) was made to do a specific group of maintenance tasks... Read more
Hazel 3.3 - Create rules for organizing...
Hazel is your personal housekeeper, organizing and cleaning folders based on rules you define. Hazel can also manage your trash and uninstall your applications. Organize your files using a... Read more
Autopano Giga 3.7 - Stitch multiple imag...
Autopano Giga allows you to stitch 2, 20, or 2,000 images. Version 3.0 integrates impressive new features that will definitely make you adopt Autopano Pro or Autopano Giga: Choose between 9... Read more
MenuMeters 1.8 - CPU, memory, disk, and...
MenuMeters is a set of CPU, memory, disk, and network monitoring tools for Mac OS X. Although there are numerous other programs which do the same thing, none had quite the feature set I was looking... Read more
Coda 2.5 - One-window Web development su...
Coda is a powerful Web editor that puts everything in one place. An editor. Terminal. CSS. Files. With Coda 2, we went beyond expectations. With loads of new, much-requested features, a few... Read more

Latest Forum Discussions

See All

MonSense Review
MonSense Review By Jennifer Allen on October 21st, 2014 Our Rating: :: ORGANIZED FINANCESiPhone App - Designed for the iPhone, compatible with the iPad Organize your finances with the quick and easy to use, MonSense.   | Read more »
This Week at 148Apps: October 13-17, 201...
Expert App Reviewers   So little time and so very many apps. What’s a poor iPhone/iPad lover to do? Fortunately, 148Apps is here to give you the rundown on the latest and greatest releases. And we even have a tremendous back catalog of reviews; just... | Read more »
Angry Birds Transformers Review
Angry Birds Transformers Review By Jennifer Allen on October 20th, 2014 Our Rating: :: TRANSFORMED BIRDSUniversal App - Designed for iPhone and iPad Transformed in a way you wouldn’t expect, Angry Birds Transformers is a quite... | Read more »
GAMEVIL Announces the Upcoming Launch of...
GAMEVIL Announces the Upcoming Launch of Mark of the Dragon Posted by Jessica Fisher on October 20th, 2014 [ permalink ] Mark of the Dragon, by GAMEVIL, put | Read more »
Interview With the Angry Birds Transform...
Angry Birds Transformers recently transformed and rolled out worldwide. This run-and-gun title is a hit with young Transformers fans, but the ample references to classic Transformers fandom has also earned it a place in the hearts of long-time... | Read more »
Hail to the King: Deathbat Review
Hail to the King: Deathbat Review By Rob Thomas on October 20th, 2014 Our Rating: :: SO FAR AWAYUniversal App - Designed for iPhone and iPad Hail to the King: Deathbat may feel like “Coming Home” for Avenged Sevenfold’s faithful,... | Read more »
Find Free Food on Campus with Ypay
Find Free Food on Campus with Ypay Posted by Jessica Fisher on October 20th, 2014 [ permalink ] iPhone App - Designed for the iPhone, compatible with the iPad | Read more »
Strung Along Review
Strung Along Review By Jordan Minor on October 20th, 2014 Our Rating: :: GOT NO STRINGSUniversal App - Designed for iPhone and iPad A cool gimmick and a great art style keep Strung Along from completely falling apart.   | Read more »
P2P file transferring app Send Anywhere...
File sharing services like Dropbox have security issues. Email attachments can be problematic when it comes to sharing large files. USB dongles don’t fit into your phone. Send Anywhere, a peer-to-peer file transferring application, solves all of... | Read more »
Zero Age Review
Zero Age Review By Jordan Minor on October 20th, 2014 Our Rating: :: MORE THAN ZEROiPad Only App - Designed for the iPad With its mind-bending puzzles and spellbinding visuals, Zero Age has it all.   | Read more »

Price Scanner via MacPrices.net

Deals on 2011 13-inch MacBook Airs, from $649
Daily Steals has the Mid-2011 13″ 1.7GHz i5 MacBook Air (4GB/128GB) available for $699 with a 90 day warranty. The Mid-2011 13″ 1.7GHz i5 MacBook Air (4GB/128GB SSD) is available for $649 at Other... Read more
2013 15-inch 2.0GHz Retina MacBook Pro availa...
B&H Photo has leftover previous-generation 15″ 2.0GHz Retina MacBook Pros now available for $1599 including free shipping plus NY sales tax only. Their price is $400 off original MSRP. B&H... Read more
Updated iPad Prices
We’ve updated our iPad Air Price Tracker and our iPad mini Price Tracker with the latest information on prices and availability from Apple and other resellers, including the new iPad Air 2 and the... Read more
Apple Pay Available to Millions of Visa Cardh...
Visa Inc. brings secure, convenient payments to iPad Air 2 and iPad mini 3as well as iPhone 6 and 6 Plus. Starting October 20th, eligible Visa cardholders in the U.S. will be able to use Apple Pay,... Read more
Textkraft Pocket – the missing TextEdit for i...
infovole GmbH has announced the release and immediate availability of Textkraft Pocket 1.0, a professional text editor and note taking app for Apple’s iPhone. In March 2014 rumors were all about... Read more
C Spire to offer iPad Air 2 and iPad mini 3,...
C Spire on Friday announced that it will offer iPad Air 2 and iPad mini 3, both with Wi-Fi + Cellular, on its 4G+ LTE network in the coming weeks. C Spire will offer the new iPads with a range of... Read more
Belkin Announces Full Line of Keyboards and C...
Belkin International has unveiled a new lineup of keyboard cases and accessories for Apple’s newest iPads, featuring three QODE keyboards and a collection of thin, lightweight folios for both the... Read more
Verizon offers new iPad Air 2 preorders for $...
Verizon Wireless is accepting preorders for the new iPad Air 2, cellular models, for $100 off MSRP with a 2-year service agreement: - 16GB iPad Air 2 WiFi + Cellular: $529.99 - 64GB iPad Air 2 WiFi... Read more
Price drops on refurbished Mac minis, now ava...
The Apple Store has dropped prices on Apple Certified Refurbished previous-generation Mac minis, with models now available starting at $419. Apple’s one-year warranty is included with each mini, and... Read more
Apple refurbished 2014 MacBook Airs available...
The Apple Store has Apple Certified Refurbished 2014 MacBook Airs available for up to $180 off the cost of new models. An Apple one-year warranty is included with each MacBook, and shipping is free.... Read more

Jobs Board

Project Manager / Business Analyst, WW *Appl...
…a senior project manager / business analyst to work within our Worldwide Apple Fulfillment Operations and the Business Process Re-engineering team. This role will work Read more
*Apple* Retail - Multiple Positions (US) - A...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Position Opening at *Apple* - Apple (United...
…customers purchase our products, you're the one who helps them get more out of their new Apple technology. Your day in the Apple Store is filled with a range of Read more
Position Opening at *Apple* - Apple (United...
**Job Summary** At the Apple Store, you connect business professionals and entrepreneurs with the tools they need in order to put Apple solutions to work in their Read more
Position Opening at *Apple* - Apple (United...
**Job Summary** The Apple Store is a retail environment like no other - uniquely focused on delivering amazing customer experiences. As an Expert, you introduce people Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.