TweetFollow Us on Twitter

Custom Input Dialog
Volume Number:1
Issue Number:8
Column Tag:Pascal Procedures

"Custom Dialog Box for Input"

By Alan Wootton, President, Top-Notch Productions, MacTutor Contributing Editor

Our Project for this month is to create a pair of input statements for MacPascal. In Basic, there is a command that prompts the user for a number or a string. It would be nice to have this for MacPascal, but would be even better if it could be implemented using the excellent MacIntosh user interface. Towards this end, we will be using the Dialog Manager, Package 7, and Resources.

Resources

Previous generations of computers provided only files as storage entities. Any small or large chunk of numbers to be accessed by the operating system usually required a file to hold it. If a program needed a large number of small data areas the result was usually a large number of files. This happened all too often.

The Mac is different. On the Mac a file name actually represents two files. One of these is the usual type of file, the other is full of tiny subfiles. A whole new world! Naturally, there is a sort of directory to go with these subfiles.

Inside Mac calls the two files "forks" of a file. The subfiles are "resources" and the directory is the "resource map". In a normal file system all files are referred to by name and possibly a version number. Resources are referred to by a four character name called the "TYPE" (actually any longint) and an integer known as the "ID number". Many of the ROM routines access a particular TYPE with the ID being variable. For instance, a menu can be created by providing a number and the Menu Manager will access the resource with TYPE='MENU' and the ID provided.

File access can be quite a programming hassle, so you are probably imagining that resource access is even worse. Not true. There is no way to read in only part of a resource, so the subtleties of file i/o can be ignored. You provide a name and the resource manager will open the file for you. When you provide a TYPE and an ID the resource manager will search the maps that are open, read the data in, if necessary, and return a handle to that data. There are some fine points concerning control over when the data is read in, when it is to be purged from memory, which heap it goes on, and others. For our purposes it is enough to just open the file.

Resource Tools

Every computer has some sort of software to manipulate and view the files, so what does one use for resources? There are four tools from Apple to work with resources.

The simplest is RMover. RMover will simply list the resources in a file. You may also cut and paste resources between files. RMover will recognize some types as probably having a certain form of data and display it appropriately. Examples are STR (a string), PICT (a picture), ICON (an icon). In each case the data is simply so many bytes, but it is assumed that a particular type is used exclusively for a single brand of data (which is not a law). Every Mac freak should rummage through the files on his disks with RMover to get a feel for what is there (check out MacPascal!).

For programming, the next most useful tool is RMaker. This is a sort of compiler for resources. It knows the form of the data for windows, menus, dialog boxs, and more. Make a text file with coded descriptions in it, run RMaker and a new file is created with the described resources in it. RMaker is supplied with the MDS assembler from Apple and with some compilers (note: MDS is now shipping and includes a copy of Inside Macintosh). Get a copy of RMaker as soon as possible (there is a 10 page document you'll also need).

Recently, two editors of resources have become available. These are "Resource Editor" and "Redit". Both will edit resource data, often in a friendly format. For instance, the Resource Editor will allow you to edit an icon fatbits style and not as 128 bytes.

If you bought Inside MacIntosh and the software supplement these tools were sent to you. If not, there are still some places to get them. MacTutor Utility disk #1 has resource tools (see inside front cover for ordering).

The Dialog Manager

Now we will get back to the problem at hand: how to make a box that asks for input. What we ultimately need is a window (which has a grafport) and some controls. We also will need to use the text editor to edit the input data. If it weren't for the Dialog Manager this would be real work. Fortunately, the Dialog Manager will perform all of these chores for us. I won't go too deeply into this because that is what IM is for, but all you have to do is give the dialog manager an id to a resource of type DLOG and, assuming that the data is in the correct form, everything is automatic.

Classy_Input.R

The first step in our project is to create a file with three resources in it. Type Classy_Input.r (below) into a text file and apply RMaker to it. After that, use RMover to look and see if the resources exist in the file as planned. If you don't have RMaker you might try making the file with Resource Editor. If there is a lot of trouble creating this file, (it's important) write to me care of MacTutor and I will do a resource creation project. Actually, we should use RMaker input files as the official resource specification and exchange method.

Classy_Input.Pas

Next, boot MacPascal and type in Classy_Input.pas (below). This is a very simple program. First we open our resource file. The dialog box is created by GetNewDialog, operated by ModalDialog, and erased by DisposDialog. Simple! Of course, I've gotten fancy and used GetDItem and SetIText to change the text of some items. It is also necessary to use a GetDItem-GetIText combination to get the text from the edittext item. With these same simple routines it is possible to do much more elaborate dialogs. As a matter of fact, you can completely change the appearance of this example by merely changing the resource specification. Note that this is the same method used by real Mac applications and is not just a kludge for educational purposes.

You may omit Prompt_For_Number at first if you wish. After you have Prompt_for_String working you may wish to try for numbers. The prompt for strings looks like that shown at the top of the next column.

Fig. 1 Program Sample

To use this same box to prompt for numbers we will use Package #7. To access a package you use it's inline trap and leave a selector on the stack: eg. inlineP(TRAP,selector). However, Pack#7 is register based so it is necessary to use the register based interface that I presented in MacTutor No.6.

GetNewDialog accesses resource DLOG 12345 and DITL 12345 in order to determine the characteristics of the box it will make. Pack#7 loads resource PACK 7 (in the file "System"), locks it on the heap and then calls it as a procedure (we will call our own procedures the same way in later articles). By far the simplest of the resource-using toolbox routines is GetString:

 
procedure GetString(ID:integer):Handle;
begin 
 GetString:=GetResource('STR ',ID);
end
 

This also one of the simplest traps of any kind. All text of any kind should be in resources for later translation. This is the reason we use GetString, and also the reason we use GetNewDialog and not NewDialog. You should take up the habit of using resources this way,too.

Classy_Input.R
;;     *********************************************
;;     **                                                            
                      **
;;    **    Resource data for Classy_Input         **
;;    **                                                             
                      **
;;    **    Process this TEXT file through           **
;;    **    RMaker:the Resource Compiler        **
;;    **     by Andy Hertzfeld.                                    **
;;    **                                                             
                     **
;;    *********************************************
;;     double semicolons start comments
;;
MacTutor_disk:Classy_Input.rsrc;;
????????               
;; destination volume:filename 
;; type and creator of file = ???? ????

;;        ****************************************
;;        **  The first resource is the                  **
;;        **  definition of a Dialog Manager    **
;;        **  window.                                                
   **
;;       ****************************************
;;  global coordinates !!

type DLOG
box,12345
;;  note we have no title
96 128 148 384          ;; top left bottom right 
visible goaway
1                                          ;; window type = dBoxProc 

0                                          ;; refcon
12345                             ;; ID of DITL associated
                                            ;; with this DLOG

;;       ****************************************
;;       **      Next is a list of 'items' to go       **
;;       **       in the window.                                 **
;;       ****************************************

type DITL                            ;; see Dialog Manager
items,12345
4                                               ;; four items 

Button
4 120 24 180                    ;;  local coordinates !!
OK;;

Button
4 188 24 248
Cancel;;

EditText Disabled  
32 8 48 248        
;;;;;;;;;;;;;;;;;;text added later 

StaticText Disabled  
4 8 20 120           
Type a String         ;; prompt text, modified later

;;      disabled means that the Dialog Manager
;;      will not report events in this control
;;
;;          *********************************************
;;          **     And finally, the prompt used by        **
;;          **    Prompt_For_Number                              **
;;          *********************************************

type STR 
prompt,12345
Type a number

;;         ****************************************
;;         **  end of file                                           
     **
;;         ****************************************


Classy_Input.pas
program Classy_Input_test;{ by Alan Wootton 5/85 }
 type
  Ptr = ^integer;
  Handle = ^Ptr;
  StrPtr = ^str255;

 var{ for test, not a part of final logic }
  rid : integer;
  number : longint;
  words : str255;

 function Prompt_for_Str (prompt, sample : str255) :
                                          str255;
  var
   DlogPtr : Ptr;
   itype, itemHit : integer;
   r : rect;
   itemH : Handle;
   tempStr : str255;

{ This uses DLOG ID=12345 and associated DITL with }
{ the same ID.  Items are: #1=OK , #2=Cancel, }
{ #3=result, #4=prompt.  First we will _GetDitem to }
{ obtain handle and then _SetIText. For item#3= result }
{ string, and item#4 = prompt string. This will leave }
{ itemH referring to result item. }
 begin
  DlogPtr:= pointer(LinlineF($A97C,12345,nil,pointer(-1))); 
{ _GetNewDialog }

  inlineP($A98D, DlogPtr, 4, @itype, @itemH, @r);
{ _GetDitem }
  if prompt <> '' then
   inlineP($A98F, itemH, @prompt);{ _SetIText }

  inlineP($A98D, DlogPtr, 3, @itype, @itemH, @r);
{ _GetDitem }
  if sample <> '' then
   inlineP($A98F, itemH, @sample);{ _SetIText }

  inlineP($A991, nil, @itemHit);
{ _ModalDialog, returns with 1 or 2 in itemHit }

  if itemHit = 2 then { if Cancel }
   tempStr := ''
  else {  if OK }
   inlineP($A990, itemH, @tempStr);
{ _GetIText  from item#3 }

  inlineP($A983, DlogPtr);{ _DisposDialog }
  Prompt_for_Str := tempStr;
 end;


 function Prompt_for_Number (sampN : longint) :
                                                                     
      longint;
  var
   sHan : ^StrPtr;
   str : str255;
   access : array[0..12] of integer;
   d0, a0 : longint;{ the 68000 registers }
{ What we will do here is convert the input number }
{ into a string and then pass it to Prompt_for_String. }
{ Then we convert the returned string into a number.  }
{ The conversions are done with  $A9EE=pack7 . }
{ See Packages. }
{ Access is a 2 register OS interface that we must }
{ use because the call is register based yet also requires}
{ for the selector (the 1 or 0) to be on the stack  }
{ (and 'Generic' won't do that) }
 begin
  stuffHex(@access, '2848548C41FA000C309F245F265F20522013FFFF224826804ED4');
  a0 := ord(@str);
  d0 := sampN;
  inlineP($4E75, 0, @d0, @a0, $A9EE, @access);
{ pack7,0  is _NumtoString }
{    Str is now the string of  sampN }

  sHan := Pointer(LinlineF($A9BA, 12345));
{ _Getstring, numeric prompt  }
  str := Prompt_for_Str(sHan^^, str);
{ Str is now new string,  convert d0 to num. } 
{ A0 is still @str }

  inlineP($4E75, 1, @d0, @a0, $A9EE, @access);
{ pack7,1  is _StringtoNum }
  Prompt_for_number := d0;
 end;


begin{  main procedure, used only to exercise }
{ procedures above. }

 rid := WinlineF($A997, 'MacTutor_disk:Classy_Input.rsrc');{ _OpenResFile 
}
{ this file is the output of Rmaker, we open it to access }
{ our resources }
 if rid < 0 then
  writeln('error opening file', rid)
 else
  begin
   words := Prompt_for_Str('Type a string', 'sample string');
   writeln(' the words returned are:', words);

   words := Prompt_for_Str('', '');{ no prompts }
   writeln(' the words returned are:', words);

   number := Prompt_for_Number(1234);
   writeln('the number returned is', number);
  end;
 inlineP($A99A, rid);{ _CloseResFile}
end.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Notion 2.1.9 - A unified workspace for m...
Notion is the unified workspace for modern teams. Features: Integration with Slack Documents Wikis Tasks More guests: invite up to 10 collaborators, friends & family to your pages Page... Read more
Spotify 1.2.0.1165 - Stream music, creat...
Spotify is a streaming music service that gives you on-demand access to millions of songs. Whether you like driving rock, silky R&B, or grandiose classical music, Spotify's massive catalogue puts... Read more
Thunderbird 102.5.1 - Email client from...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more
Pinegrow 7.03 - Mockup and design web pa...
Pinegrow (was Pinegrow Web Designer) is desktop app that lets you mockup and design webpages faster with multi-page editing, CSS and LESS styling, and smart components for Bootstrap, Foundation,... Read more
Adobe After Effects 2022 23.1 - Create p...
The new, more connected Adobe After Effects can make the impossible possible. Get powerful new features like a Live 3D Pipeline that brings CINEMA 4D scenes in as layers - without intermediate... Read more
SteerMouse 5.6.7 - Powerful third-party...
SteerMouse is an advanced driver for USB and Bluetooth mice. SteerMouse can assign various functions to buttons that Apple's software does not allow, including double-clicks, modifier clicks,... Read more
Wireshark 4.0.2 - Network protocol analy...
Wireshark is one of the world's foremost network protocol analyzers, and is the standard in many parts of the industry. It is the continuation of a project that started in 1998. Hundreds of... Read more
Adobe Premiere Pro 2022 23.1 - Digital v...
Adobe Premiere Pro is available as part of Adobe Creative Cloud for as little as $54.99/month. The price on display is a price for annual by-monthly plan for Adobe Premiere Pro only. Adobe Premiere... Read more
1Password 8.9.10 - Powerful password man...
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
FotoMagico 6.3 - Powerful slideshow crea...
FotoMagico lets you create professional slideshows from your photos and music with just a few, simple mouse clicks. It sports a very clean and intuitive yet powerful user interface. High image... Read more

Latest Forum Discussions

See All

SwitchArcade Round-Up: ‘Chained Echoes’,...
Hello gentle readers, and welcome to the SwitchArcade Round-Up for December 8th, 2022. Today is Thursday, and that usually means an absolute deluge of new releases on the eShop. But the year is winding down, so we’ve only got ten or so to look at... | Read more »
‘Awaken Legends: Idle RPG’ Celebrates th...
Awaken Legends: Idle RPG is adding its first update since the game was soft-launched in November, letting players get their hands on a new hero “Hera Valen". Players can also look forward to the Covenant of the Dark Knight event and the Wishing Well... | Read more »
‘Horizon Chase 2’ Japan World Tour Expan...
Horizon Chase 2 () from Aquiris is getting a major expansion today on Apple Arcade. The Japan World Tour expansion brings in 11 new races across 9 cities and it should be rolling out now as of this writing. I expect it to be available worldwide... | Read more »
Dark Fantasy Visual Novel ‘The 13th Mont...
Originally announced for release in August, The 13th Month from Japanese developer Kobayashimaru and publisher Kodansha released on PC via Steam worldwide this month. The dark fantasy visual novel that reimagines the classic Sleeping Beauty tale, is... | Read more »
Tom Clancey’s The Divison Resurgence ann...
Ubisoft has announced the latest Live Test dates for Tom Clancy’s The Division Resurgence, the hotly anticipated mobile entry in the Divison series. Starting December 8th and ending on the 22nd, the test will offer a huge amount of content for the... | Read more »
‘Easy Come Easy Golf’ New Update Adds St...
Easy Come Easy Golf () from Clap Hanz is one of my favorite games on Apple Arcade. It has been updated quite a bit since launch bringing in new modes and improvements. It recently launched on Nintendo Switch as well. | Read more »
Out Now: ‘Magic vs Metal’, ‘Suzerain’, ‘...
Each and every day new mobile games are hitting the App Store, and so each week we put together a big old list of all the best new releases of the past seven days. Back in the day the App Store would showcase the same games for a week, and then... | Read more »
SwitchArcade Round-Up: Reviews Featuring...
Hello gentle readers, and welcome to the SwitchArcade Round-Up for December 7th, 2022. Today can be accurately described as Mikhail Madness, with a whopping four reviews from our pal-est of pals. Football Manager 2023 Touch, Wobbledogs, Soccer Story... | Read more »
Alchemy Stars celebrates 1 and a half ye...
It has been one and a half years since Alchemy Stars launched, and Level Infinite is celebrating in style with a host of new content. There will be a new story mission and even a store to explore, and a whole new mode for those budding idol... | Read more »
Fighting Game ‘Art of Fighting 2’ ACA Ne...
Last week, side-scrolling shooter Pulstar hit mobile platforms as the newest ACA NeoGeo series release from Hamster and SNK. Read Shaun’s review of it here. Today, fighting game Art of Fighting 2 has launched on iOS and Android. Art of Fighting 2... | Read more »

Price Scanner via MacPrices.net

New! Details on Verizon’s Christmas/Holiday p...
Verizon is offering discounts on iPhones, Apple Watch models, and iPads with specific promo codes as part of their Christmas/Holiday 2022 offerings. Codes are valid when adding a new line of service... Read more
Apple MagSafe accessories are back on Holiday...
Amazon has Apple MagSafe Chargers and Apple’s MagSafe Battery on sale for up to 24% off MSRP again as part of their Christmas/Holiday sale. Shipping is free, and all models are in stock: – MagSafe... Read more
13″ M2 MacBook Airs on sale again for the low...
Amazon has 13″ MacBook Airs with M2 CPUs in stock today and on sale for $150 off MSRP as part of their Christmas/Holiday Sale, prices start at $1049. Shipping is free. They are the lowest prices... Read more
Get an Apple 16″ MacBook Pro for $400 off MSR...
16″ MacBook Pros with Apple’s M1 Pro CPUs are in stock and on sale today at B&H Photo for $300-$400 off Apple’s MSRP for a limited time. Prices start at $2099 for M1 Pro models with 512GB or 1TB... Read more
Holiday clearance sale! Previous-generation A...
Amazon has 2nd generation 32GB and 64GB 4K Apple TVs with Siri remotes and 32GB Apple TV HDs on clearance sale for $80-$90 off original MSRP. Shipping is free, and delivery is available in time for... Read more
Christmas sale at Verizon: Apple AirPods Pro...
Verizon has first-generation Apple AirPods Pro on sale for $159.99 on their online store as part of their continuing Christmas/Holiday sale. Their price is $90 off Apple’s original MSRP, and it’s the... Read more
New Christmas/New Years promo at Xfinity Mobi...
Switch to Xfinity Mobile and open a new line of service, and take $400 off the price of a new iPhone, no trade-in required, through January 10, 2023. The $400 is applied to your account as credits... Read more
Apple iPad Smart Keyboard Folio prices drop u...
Apple iPad Smart Keyboard Folio prices have dropped up to $60 off MSRP at Amazon and Walmart as part of their Christmas/Holiday sales. These are the cheapest prices currently available for these iPad... Read more
Today is the final day for Xfinity Mobile’s $...
If you switch to Xfinity Mobile and open a new line of service, they will take $500 off the price of a new iPhone, no trade-in required. This is the best no trade-in Cyber Monday Apple iPhone 14 deal... Read more
Amazon restocks 10.2″ 64GB 9th-generation iPa...
Amazon has Apple’s 9th generation 10.2″ 64GB WiFi iPads (Silver) in stock and on sale for $269.99 shipped as part of their Christmas/Holiday Sale. Their price is $60 off Apple’s MSRP. Free delivery... Read more

Jobs Board

*Apple* Systems Administrator - JAMF - Activ...
…Administration **Duties and Responsibilities** + Configure and maintain the client's Apple Device Management (ADM) solution. The current solution is JAMF supporting Read more
Cashier - *Apple* Blossom Mall - JCPenney (...
Cashier - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Blossom Mall Read more
Omnichannel Associate - *Apple* Blossom Mal...
Omnichannel Associate - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Read more
Sephora Beauty Advisor - *Apple* Blossom Ma...
Sephora Beauty Advisor - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Read more
Operations Associate - *Apple* Blossom Mall...
Operations Associate - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.