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
$119.00
Apple Inc.
+1.40
MSFT
$47.75
Microsoft Corpora
+0.28
GOOG
$540.37
Google Inc.
-0.71

MacTech Search:
Community Search:

Software Updates via MacUpdate

Skype 7.2.0.412 - Voice-over-internet ph...
Skype allows you to talk to friends, family and co-workers across the Internet without the inconvenience of long distance telephone charges. Using peer-to-peer data transmission technology, Skype... Read more
HoudahSpot 3.9.6 - Advanced file search...
HoudahSpot is a powerful file search tool built upon MacOS X Spotlight. Spotlight unleashed Create detailed queries to locate the exact file you need Narrow down searches. Zero in on files Save... Read more
RapidWeaver 6.0.3 - Create template-base...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
iPhoto Library Manager 4.1.10 - Manage m...
iPhoto Library Manager lets you organize your photos into multiple iPhoto libraries. Separate your high school and college photos from your latest summer vacation pictures. Or keep some photo... Read more
iExplorer 3.5.1.9 - View and transfer al...
iExplorer is an iPhone browser for Mac lets you view the files on your iOS device. By using a drag and drop interface, you can quickly copy files and folders between your Mac and your iPhone or... Read more
MacUpdate Desktop 6.0.3 - Discover and i...
MacUpdate Desktop 6 brings seamless 1-click installs and version updates to your Mac. With a free MacUpdate account and MacUpdate Desktop 6, Mac users can now install almost any Mac app on macupdate.... Read more
SteerMouse 4.2.2 - Powerful third-party...
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
iMazing 1.1 - Complete iOS device manage...
iMazing (was DiskAid) is the ultimate iOS device manager with capabilities far beyond what iTunes offers. With iMazing and your iOS device (iPhone, iPad, or iPod), you can: Copy music to and from... Read more
PopChar X 7.0 - Floating window shows av...
PopChar X helps you get the most out of your font collection. With its crystal-clear interface, PopChar X provides a frustration-free way to access any font's special characters. Expanded... Read more
OneNote 15.4 - Free digital notebook fro...
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

Latest Forum Discussions

See All

Raby (Games)
Raby 1.0.3 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.3 (iTunes) Description: ***WARNING - Raby runs on: iPhone 5, iPhone 5C, iPhone 5S, iPhone 6, iPhone 6 Plus, iPad Mini Retina, iPad Mini 3, iPad 4, iPad Air,... | Read more »
Oddworld: Stranger's Wrath (Games)
Oddworld: Stranger's Wrath 1.0 Device: iOS Universal Category: Games Price: $5.99, Version: 1.0 (iTunes) Description: ** PLEASE NOTE: Oddworld Stranger's Wrath requires at least an iPhone 4S, iPad 2, iPad Mini or iPod Touch 5th gen... | Read more »
Bounce On Back (Games)
Bounce On Back 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: | Read more »
Make Way for Fat Chicken, from the Maker...
Make Way for Fat Chicken, from the Makers of Scrap Squad Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Relevant Games has announced they will be releasing their reverse tower defense game, | Read more »
Tripnary Review
Tripnary Review By Jennifer Allen on November 26th, 2014 Our Rating: :: TRAVEL BUCKET LISTiPhone App - Designed for the iPhone, compatible with the iPad Want to create a travel bucket list? Tripnary is a fun way to do exactly that... | Read more »
Ossian Studios’ RPG, The Shadow Sun, is...
Ossian Studios’ RPG, The Shadow Sun, is Now Available for $4.99 Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Mmmm, Tasty – Having the Angry Birds for...
The very first Angry Birds debuted on iOS back in 2009. When you sit back and tally up the number of Angry Birds games out there and the impact they’ve had on pop culture as a whole, you just need to ask yourself: “How would the birds taste... | Read more »
Rescue Quest Review
Rescue Quest Review By Jennifer Allen on November 26th, 2014 Our Rating: :: PATH BASED MATCH-3Universal App - Designed for iPhone and iPad Guide a wizard to safety by matching gems. Rescue Quest might not be an entirely original... | Read more »
You Can Play the Final Chapter of Lone W...
You Can Play the Final Chapter of Lone Wolf: Dawn Over V’taag Right Now Posted by Jessica Fisher on November 26th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Swords of Anima (Games)
Swords of Anima 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: A new tactical turn-based RPG experience. Command the Savior Rex Squad in an epic journey of courage and deception. Can you... | Read more »

Price Scanner via MacPrices.net

Black Friday: $300 off 15-inch Retina MacBook...
 B&H Photo has the new 2014 15″ Retina MacBook Pros on sale for $300 off MSRP as part of their Black Friday sale. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.2GHz Retina... Read more
2014 1.4GHz Mac mini on sale for $449, save $...
 B&H Photo has the new 1.4GHz Mac mini on sale for $449.99 including free shipping plus NY tax only. Their price is $50 off MSRP, and it’s the lowest price available for this new model. Adorama... Read more
Early Black Friday pricing on 27-inch 5K iMac...
 B&H Photo continues to offer Black Friday sale prices on the 27″ 3.5GHz 5K iMac, in stock today and on sale for $2299 including free shipping plus NY sales tax only. Their price is $200 off MSRP... Read more
Early Black Friday sale prices on iPad Air 2,...
 MacMall is discounting iPad Air 2s by up to $75 off MSRP as part of their Black Friday sale. Shipping is free: - 16GB iPad Air WiFi: $459 $40 off - 64GB iPad Air WiFi: $559 $40 off - 128GB iPad Air... Read more
Early Black Friday MacBook Air sale prices, $...
 MacMall has posted early Black Friday MacBook Air sale prices. Save $101 on all models for a limited time: - 11″ 1.4GHz/128GB MacBook Air: $798 - 11″ 1.4GHz/256GB MacBook Air: $998 - 13″ 1.4GHz/... Read more
Why iPhone 6 Tablet/Laptop Cannibalization Is...
247wallst.com blogger Douglas A. McIntyre noted last week that according to research posted on the Applovin blog site the iPhone 6 is outselling the iPhone 6 Plus by a wide margin . Hardly a surprise... Read more
Worldwide Tablet Growth Expected to Slow to 7...
The global tablet market is expected to record massive deceleration in 2014 with year-over-year growth slowing to 7.2%, down from 52.5% in 2013, according to a new forecast from International Data... Read more
Touchscreen Glove Company Announces New Produ...
Surrey, United Kingdom based TouchAbility specializes in design and manufacture of a wide variety of products compatible with touchscreen devices including smartphones, tablets and computers. Their... Read more
OtterBox Alpha Glass Screen Protectors for iP...
To complement the bigger, sharper displays on the latest Apple devices, OtterBox has introduced Alpha Glass screen protectors to the iPhone 6 and iPhone 6 Plus. The fortified glass screen protectors... Read more
Early Black Friday Mac Pro sale, 6-Core 3.5GH...
 B&H Photo has the 6-Core 3.5GHz Mac Pro on sale today for $3499 including free shipping plus NY sales tax. Their price is $500 off MSRP, and it’s the lowest price available for this model from... Read more

Jobs Board

*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Senior Event Manager, *Apple* Retail Market...
…This senior level position is responsible for leading and imagining the Apple Retail Team's global event strategy. Delivering an overarching brand story; in-store, Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.