TweetFollow Us on Twitter

Draw Picts
Volume Number:3
Issue Number:9
Column Tag:Basic Forum

Draw Picts from Basic

By Steven Leach, Chemical Engineer, Santa Clara, CA

Create PICT Files for MacDraw™ using MS Basic

This a solution to a problem that I was having when I was writing a rather complex figure in BASIC and wanted to save my very valuable work, but wouldn’t or couldn’t use the clipboard, or scrapbook. It seemed to me that the names for the BASIC pictures and the PICT file of the scrapbook seemed awful close so I thought why not bypass the scrapbook altogether ? My first step was to get the format for the MacDraw™ files. I located this on Compuserve in Tech Note 27. But beware there appears to be an error in the wording of this document for it states “If your application is going to create or modify information that you want to make available to MacDraw, you will want to create a data file in the PICT format.” The tech note goes on to explain the first 512 byte header, of which the first 4 bytes is supposed to be “DRWG”, or “PICT”, and if the next two bytes are not “MD” then the rest of the header can be zero bytes (chr$(0)). Well I have news for you this just does not work , the MacDraw™ page comes out blank.

However on examining the PICT files created by several programs like SuperPaint, and Cricket Draw I ascertained that the entire 512 byte header should be zeroed. Walah! my file is read properly. Now what about complex pictures that may be stored in your program as several picture strings. Well here we must concatonate them into a single picture string in order to get the file to be read properly, as is done in the short sample program presented in Listing 1.

This program will work with any MS Basic 2.0 or greater, but if you check, the line segments that make up the sine wave are individual objects in MacDraw™. This is fine for some cases but some of the items I wanted to appear as polygons, or grouped objects. The solution is available in the CLR libraries that are provided in MS Basic 3.0. If you wish to have a polygon in the PICT file, simply create one using the libraries. This adjustment is shown in Listing 2 for the sine wave picture that is later labeled as PICT2$. I also set the creator of the file to be MacDraw™.

I’m in heaven; I can save my pictures for all posterity. Wait what happened to my picture it’s the same and yet different. As usual there are some sobering quirks that you need to know about before you start celebrating. These quirks show up in version 1.9, I have not had a chance to use the version 1.95 that is being released now. The quirks are:

1) Any patterns that are used to draw lines are lost, the lines are solid lines in MacDraw.

2) As you guessed there is the usual problem with the fonts that are presented in MacDraw™.

3) Polygons saved to the PICT file as polygons can never be ungrouped, but they have all of the nice properties that polygons have, they can be smoothed and reshaped.

4) If you use an uneven pen , i.e. when the x and y dimensions of the pen are different; MacDraw will even the line out using the largest size. An example of this is given in listing 1&2 where the rectangle is framed with a pen that is (3,1). When you view the MacDraw picture you can see that the rectangle has a 3 pixel wide line on all sides.

Ok we can create MacDraw PICT files, is it possible to go the other way ? You bet. As a matter of fact it’s easy as long as we restrict the MacDraw picture to relatively simple things. This is required because the string variables that are used to store the pictures in BASIC are limited to 32767 characters. A BASIC program that is quite general is shown in listing 3.

This opens up the possibility of drawing anything in MacDraw and then reading it into BASIC and using it as you wish, perhaps a template for a complex user interface screen, or saving the picture as a resource to be used in your compiled program. It is possible to create dialogs with pictures in them to really wow those “C” programmers who consider BASIC a “toy” language.

Fig. 1 Draw PICT created from Basic

{1}
REM LISTING 1
REM THIS PROGRAM IS USABLE IN ALL MICROSOFT BASIC’S 
 VERSION 2.0 OR REM GREATER
REM try to create a macdraw PICT file
REM Tech Note # 27 specifies the PICT file structure 
 that is expected by MacDraw

    DIM Grey%(3)
    RESTORE PatternData
    FOR j% = 0 TO 3 : READ Grey%(j%) : NEXT

    PatternData:
        DATA -21931,-21931,-21931,-21931

REM define some objects that will be used for this       demonstration
REM read in the data that define the rectangle and 
 circle

DIM rect%(3),aCircle%(3)
RESTORE ObjectData
  READ rect%(0)
  READ rect%(1)
  READ rect%(2)
  READ rect%(3)
  READ aCircle%(0)
  READ aCircle%(1)
  READ aCircle%(2)
  READ aCircle%(3)

    ObjectData:
      DATA 10,10,110,150,100,100,200,200
      
     X.Offset = 0        
‘offset to be used in saving the picture in MacDraw
     Y.Offset = 0        
‘ if offsets not zero picture will have an upper 
‘ right corner at the location (X.Offset,Y.Offset)
  
    REM record first picture with pen on 
    PICTURE ON
     CALL SHOWPEN
     CALL PENSIZE(3,1)
     CALL FRAMERECT(VARPTR(rect%(0)))
     CALL PENNORMAL
     CALL PENPAT(VARPTR(Grey%(0)))
     CALL PAINTOVAL(VARPTR(aCircle%(0)))
     CALL PENSIZE(3,3)
     FOR indx% = 0 TO 3 : aCircle%(indx%) = aCircle%(indx%) + 50 : NEXT
         
     CALL FRAMEOVAL(VARPTR(aCircle%(0)))
     CALL PENNORMAL  
     CALL MOVETO  (10,10)
     CALL LINETO (100,200)
         
    PICTURE OFF
    pict1$ = PICTURE$
    
    REM now start the second picture
    PICTURE ON
        CALL MOVETO(100,100)
        FOR indx% = 1 TO 20
            CALL LINE(indx%,10*SIN(indx%))
        NEXT
    PICTURE OFF
    pict2$ = PICTURE$

REM we must now group all of the separate pictures as a REM single picture 
before they can be outputted to TRM the PICT file

    CALL HIDEPEN
    PICTURE ON
        PICTURE (X.Offset,Y.Offset), pict1$
‘use any valid offset you wish
        PICTURE (X.Offset,Y.Offset), pict2$
‘use same offset to get relationship right
    PICTURE OFF
    Pict$ = PICTURE$

    File.Pict$ = FILES$(0,”Name for this Picture ?”)
‘get the name of the file
    IF LEN(File.Pict$) <  5 THEN END
‘if no file name then quit

OPEN File.Pict$ FOR OUTPUT AS #1
FOR indx% = 1 TO 512 
 PRINT  #1,CHR$(0); 
 NEXT    ‘print out the header for the PICT file

PRINT  #1,Pict$;   ‘ Print out the picture to the file
CLOSE #1
NAME File.Pict$ AS File.Pict$,”PICT”     
‘type the file as PICT so can open from inside MacDraw™
{2}
REM This is listing 2 and is usable in MS BASIC 3.0 or greater
REM create a macdraw PICT file
REM Tech Note # 27 specifies the PICT file structure that is expected 
by MacDraw

LIBRARY “MSTools”

    DIM Grey%(3)
    RESTORE PatternData
    FOR j% = 0 TO 3 : READ Grey%(j%) : NEXT

    PatternData:
        DATA -21931,-21931,-21931,-21931

REM define some objects that will be used for this       demonstration
REM read in the data that define the rectangle and 
 circle

DIM rect%(3),aCircle%(3)
RESTORE ObjectData
  READ rect%(0)
  READ rect%(1)
  READ rect%(2)
  READ rect%(3)
  READ aCircle%(0)
  READ aCircle%(1)
  READ aCircle%(2)
  READ aCircle%(3)

    ObjectData:
      DATA 10,10,110,150,100,100,200,200
      
     X.Offset = 0        
‘offset to be used in saving the picture in MacDraw
     Y.Offset = 0        
‘ if offsets are not zero the picture will have an 
 upper right corner at that location
  
    REM record first picture with pen on 
     PICTURE ON
     CALL SHOWPEN
         CALL PENSIZE(3,1)
         CALL FRAMERECT(VARPTR(rect%(0)))
         CALL PENNORMAL
         
         CALL PENPAT(VARPTR(Grey%(0)))
         CALL PAINTOVAL(VARPTR(aCircle%(0)))

        CALL PENSIZE(3,3)
         FOR indx% = 0 TO 3 : aCircle%(indx%) = aCircle%(indx%) + 50 
: NEXT
         
         CALL FRAMEOVAL(VARPTR(aCircle%(0)))
         CALL PENNORMAL
         
         CALL MOVETO  (10,10)
         CALL LINETO (100,200)
         
    PICTURE OFF
    pict1$ = PICTURE$
    
    REM now start the second picture as polygon
    PGon! = 0
    openPGon PGon!
        CALL MOVETO(100,100)
        FOR indx% = 1 TO 20
            CALL LINE(indx%,10*SIN(indx%))
        NEXT
    CLOSEPGon
    
    PICTURE ON
    FramePgon PGon!
    PICTURE OFF
    pict2$ = PICTURE$

REM we must group all of the separate pictures as a 
 single picture
REM before they can be outputted to the MacDraw™ PICT 
 file
    CALL HIDEPEN
    PICTURE ON
        PICTURE (X.Offset,Y.Offset), pict1$
‘use any valid offset you wish
        PICTURE (X.Offset,Y.Offset), pict2$
‘use same offset to get relationship right
    PICTURE OFF
    Pict$ = PICTURE$

    File.Pict$ = FILES$(0,”Name for this Picture ?”)  ‘get the name of 
the file
    IF LEN(File.Pict$) <  5 THEN END
‘if no file name then quit

OPEN File.Pict$ FOR OUTPUT AS #1
FOR indx% = 1 TO 512     
 ‘print out the header for the PICT file
    PRINT  #1,CHR$(0); 
 ‘ note use of ; to prevent chr$(13)
NEXT 
PRINT  #1,Pict$;
‘ Print out the picture to the file
CLOSE #1
NAME File.Pict$ AS File.Pict$,”PICT”
 ‘type the file as PICT so can open  ‘from inside MacDraw™
Setcreate File.Pict$ , “MDRW”
{3}
‘ listing 3  
‘ This small routine reads MacDraw PICT FILES AND 
‘ displays the PICTURE

    
    File.Pict$ = FILES$(1,”PICT”)
 ‘Get the FileName
    IF LEN(File.Pict$) < 5 THEN END
 ‘if no file name then quit

    OPEN File.Pict$ FOR INPUT AS #1
 ‘ open the file for input
    FOR indx% = 1 TO 512   
 ‘read the the first 512 byte header
        tmp$ = INPUT$(1,#1) 
    NEXT       
    PICT$ = INPUT$(LOF(1)-512,#1)    
 ‘ read the rest of the file into a string
    CLOSE #1
 ‘  close the file
    CLS
 ‘ clear the screen and display the picture
    PICTURE , PICT$
 

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

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 »
Everything about Hero Academy 2: Part 1...
So you've started playing Hero Academy 2, and you're feeling a little bit lost. Don't worry, we've got your back. So we've come up with a series of guides that are going to help you get to grips with everything that's going on in the game. [Read... | Read more »

Price Scanner via MacPrices.net

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
Apple now offering Certified Refurbished 2017...
Apple has Certified Refurbished 9.7″ WiFi iPads available for $50-$80 off the cost of new models. An Apple one-year warranty is included with each iPad, and shipping is free: – 9″ 32GB WiFi iPad: $... 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.