TweetFollow Us on Twitter

Clipboard 2
Volume Number:1
Issue Number:6
Column Tag:BASIC

The Clipboard

By Dave Kelly

One of the features that makes the Macintosh unique from other computers is the use of the clipboard. The clipboard adds flexibility to the Mac user interface. With it you can exchange data from one application to another. Anyone who has worked with MacPaint or MacWrite is familar with the operation of the clipboard. What you cut or copy is saved in the clipboard allowing you to paste it somewhere else! But how do you deal with the clipboard from your own programs? That is the subject we want to explore this month.

Support of the clipboard is another feature of the Macintosh user interface that was left out of MSBASIC version 1.0 but fortunately is easily used in version 2.0. Most of the features that we will use here will only work for version 2.0. There are a few things you should keep in mind when writing programs to use the clipboard.

First, there are three different ways which BASIC can address the clipboard file. Use the OPEN statement with one of the following statements for the filename:

“CLIP:” for transferring data from programs that have tabular data, like Multiplan or Chart.

“CLIP:TEXT” for transfering text to and from word processors and other programs.

“CLIP:PICTURE” for transferring picture data to and from MacPaint or other programs.

Files that are OPENed to this device, using the mode indicated above, will read/write data directly from/to the Clipboard File stored on the system disk.

The sample program ‘Show Clip’ shows how the clipboard could be read within an application and displayed. You have probably seen many applications that give the user the option to “Show Clipboard”. The program will check to see if the clipboard contains picture data or text and will read the data accordingly and display it in the window. This routine is an example to show how to read from the clipboard, but could be used in your own application to produce the “Show Clipboard” option.

When you make use of EDIT FIELDs in your programs you should keep the Edit menu active so that your EDIT FIELD can be fully edited using the cut, copy and paste feature of the Edit menu. This way the clipboard is being used without having to do a whole lot of programing; however the operation is still manual. The user must decide what to select and copy or cut it into the EDIT FIELD. The same is true for inserting text with the paste option.

If the file is opened to “CLIP:” or “CLIP:TEXT”, the data is read sequentially from the clipboard file. There are actually two clipboard areas. One is the clipboard file and the other is a temporary area in memory. That’s why sometimes the disk turns on when you cut or copy something and other times it doesn’t.

To write text to the clipboard:

• Open the clipboard with OPEN “CLIP:” FOR OUTPUT AS #1 or equivalent.

• Use Write #1 or Print #1 to write your variable to the clipboard file.

• CLOSE #1 to close the file.

To read from the clipboard:

• Open the clipboard with OPEN “CLIP:” FOR OUTPUT AS #1 or equivalent.

• Use INPUT #1 to read variables from the clipboard file.

• CLOSE #1 to close the file.

See the program for an example of this.

You should remember to use the proper format when storing data in the clipboard so that other applications may use the data. For example, the text that a word processor uses would contain format control characters imbedded in the text. These kind of characters should only be left in the text stored in the clipboard if you know that the program that will be reading it will use them. Some things might not matter what format they are stored in and the data can be formatted once it has been read into the new application. Most of the applications available will tell you how the data is formatted, so if you know what the data will be used in, there won’t be any problem. Some help on transfering files to and from the clipboard and other applications can be found on page 55 of the BASIC manual.

Copying pictures is just about as easy as text. To transfer something to MacPaint:

• Use the PICTURE ON statement to record the graphics statements.

• Issue all the graphics statements you need to produce the picture. You don’t have to draw it to record it as a picture.

• Use PICTURE OFF to stop recording graphics.

A good example of this is found in the BASIC manual page 205.

• Next open the clipboard file with OPEN “CLIP:PICTURE” FOR OUTPUT AS #1 (or equavalent statement)

• Send the picture to the clipboard with PRINT #1,PICTURE$

• Close the file: CLOSE #1

Next you can either exit BASIC and paste the picture into MacPaint or save the picture in the Scrapbook to use later.

To transfer MacPaint pictures to BASIC:

• Put the MacPaint picture in the Clipboard

• Open the clipboard file with OPEN “CLIP:PICTURE” FOR INPUT AS #1 (or equavalent statement)

• Transfer the picture to a string variable (called image$ in this case): image$=INPUT$(LOF(1),1)

• Close the file: CLOSE #1

• Draw the Picture to the screen exactly the way it was recored: PICTURE,image$

See the program for an example of reading a picture from the clipboard.

To determine if the data in the clipboard is picture or text we can use the BASIC statement LOF. LOF(1) will return the length of the specified file (in this case our file is “CLIP:”. If the result turns out to be zero, it means that either the data is a picture or the clipboard is empty. So next just read whatever picture Is stored, if any. If the clipboard is empty, the resulting string variable will also be empty.

There is one more way to store text or graphics in the clipboard. I’m not sure that there is a good reason to want to do this though. Using a screen GET, a portion of the screen can be copied into a non-string variable array. This variable can be written to the clipboard for later use. You can then read the clipboard and use a screen PUT, to place the data back on the screen. The screen GET and PUT commands are much more useful in moving sections of the screen image. Since the array used is not a string, it is not in the proper format for MacPaint or for PICTURE statements. I tried to use screen GET and PUT to read the picture of Professor Mac found in last month’s Screen Poke article. The problem is that when the image is directly poked on the screen, BASIC doesn’t recognize it as being anything useful. You can’t record pokes with the PICTURE ON/OFF feature of BASIC. Perhaps one of our readers knows how to change the data from a screen GET format to MacPaint picture format. For most programs you will want to use the other methods mentioned anyway.

In conclusion, figure 1 shows the different ways that data can be stored in the clipboard. Most of these methods are explained fairly well in the BASIC 2.0 manual. (ref. pg. 55-58 for more information on tranfering data between BASIC and other programs. Note there is an error on page 58 where it says PICTURE$,IMAGE$ should be PICTURE, IMAGE$. Also see pg. 205 for PICTURE statement.)

‘     Show Clip
‘     By Dave Kelly
‘     ©MACTUTOR 1985

‘Set up windows
WINDOW 1,”Output Window”, (2,40)-(510,200),1
WINDOW 2,”Clipboard File”,  (2,220)-(510,340),1
WINDOW CLOSE 2
‘Set up menus
MENU 4,0,0,””
MENU 5,0,1,”Windows”
MENU 5,1,1,”Output Window”
MENU 5,2,1,”Show Clipboard”
MENU 5,3,1,”Quit”
ON MENU GOSUB handlemenu
MENU ON
ON DIALOG GOSUB handlewindow
DIALOG ON
EDIT FIELD 1,””,(150,42)-(365,120),1
show:GOTO show:GOSUB showclipboard
handlemenu:  ‘Menu handler
number=MENU(0)
IF number<>5 THEN RETURN
item=MENU(1):MENU
IF item=1 THEN WINDOW 1
IF item=2 THEN GOSUB showclipboard
IF item=3 THEN WINDOW CLOSE 2:WINDOW CLOSE 1:MENU RESET: END
RETURN
handlewindow:  ‘Menu handler
stat=DIALOG(0)
IF stat=3 THEN WINDOW DIALOG(3)
IF stat=4 THEN WINDOW CLOSE DIALOG(4)
RETURN
showclipboard:
WINDOW 2:CLS
DIALOG STOP:MENU STOP
‘Read text from clipboard
OPEN “CLIP:TEXT” FOR INPUT AS #1
IF LOF(1)=0 THEN CLOSE #1:GOTO   do.picture
LOCATE 1,1
WHILE NOT EOF(1)
        INPUT #1,a$:PRINT a$
WEND
CLOSE #1:DIALOG ON:MENU ON
RETURN
do.picture:  ‘Read picture from Clipboard
DIALOG STOP:MENU STOP
OPEN “CLIP:PICTURE” FOR INPUT AS #1
        image$=INPUT$(LOF(1),1)
        PICTURE,image$
CLOSE #1:DIALOG ON:MENU ON:RETURN

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Paragraphs 1.0.1 - Writing tool just for...
Paragraphs is an app just for writers. It was built for one thing and one thing only: writing. It gives you everything you need to create brilliant prose and does away with the rest. Everything in... Read more
BlueStacks App Player 0.9.21 - Run Andro...
BlueStacks App Player lets you run your Android apps fast and fullscreen on your Mac. Version 0.9.21: Note: Now requires OS X 10.8 or later running on a 64-bit Intel processor. Initial stable... Read more
Apple iTunes 12.2 - Play Apple Music...
Apple iTunes lets you organize and stream Apple Music, download and watch video and listen to Podcasts. It can automatically download new music, app, and book purchases across all your devices and... Read more
Apple Security Update 2015-005 - For OS...
Apple Security Update 2015-005 is recommended for all users and improves the security of OS X. For detailed information about the security content of this update, please visit: http://support.apple.... Read more
Apple HP Printer Drivers 3.1 - For OS X...
Apple HP Printer Drivers includes the latest HP printing and scanning software for OS X Lion or later. For information about supported printer models, see this page. Version 3.1: The latest printing... Read more
Epson Printer Drivers 3.1 - For OS X 10....
Epson Printer Drivers installs the latest software for your EPSON printer or scanner for OS X Yosemite, OS X Mavericks, OS X Mountain Lion, and OS X Lion. For more information about printing and... Read more
Xcode 6.4 - Integrated development envir...
Xcode provides everything developers need to create great applications for Mac, iPhone, and iPad. Xcode brings user interface design, coding, testing, and debugging into a united workflow. The Xcode... Read more
OS X Yosemite 10.10.4 - Apple's lat...
OS X Yosemite is Apple's newest operating system for Mac. An elegant design that feels entirely fresh, yet inherently familiar. The apps you use every day, enhanced with new features. And a... Read more
Dash 3.0.2 - 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
FontExplorer X Pro 5.0 - Font management...
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

Heroki (Games)
Heroki 1.0 Device: iOS Universal Category: Games Price: $7.99, Version: 1.0 (iTunes) Description: CLEAR THE SKIES FOR A NEW HERO!The peaceful sky village of Levantia is in danger! The dastardly Dr. N. Forchin and his accomplice,... | Read more »
Hands-On With Raceline CC
Set for release soon, Rebellion’s motorbike racing game, Raceline CC certainly looks stylish. But how does it play? I got my hands on a preview build to answer exactly that. | Read more »
Siegefall - Tips, Tricks, and Strategies...
So, you fancy establishing a base and ruling the world again. Siegefall is a convenient place to do that, but how about some great tips and tricks on how best to go about it? Here are a few ideas on how to get ahead as a beginner to this medieval... | Read more »
The WWE Comes to Racing Rivals - Because...
Racing Rivals is a racing game that's all about, well, rivalry. And who knows rivalry better than WWE superstars (shhhh, that was rhetorical)? [Read more] | Read more »
Hey, Who Put Apple Music in My SoundHoun...
One of the App Store's popular music discovery sources - SoundHound - has already been updated to include Apple's own music discovery source - Apple Music. That was fast! [Read more] | Read more »
Arcane Legends has a New Expansion Calle...
Arcane Legends has been going strong since it debuted at the tail end of 2012. So well, in fact, that it's already up to its sixth expansion. [Read more] | Read more »
Vector 2 is Officially a Thing and it...
Vector is a pretty cool parkour-driven runner that's gotten a pretty decent following since it first came out - although personally I think more people could stand to show it some love. Anyway, Nekki has announced that a sequel isofficially on its... | Read more »
Get Ready to Trucksform and Roll Out (an...
It looks like NuOxygen is bringing the truck-transforming racer Trucksform (get it?) to iOS in a couple of weeks. Although really it's more of an auto-driver than a racer. But still, transforming trucks! [Read more] | Read more »
This Week at 148Apps:June 22-26, 2015
June's Summer Journey Continues With 148Apps How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you're looking for. The ones we love become Editor’s Choice,... | Read more »
LEGO® Minifigures Online (Games)
LEGO® Minifigures Online 1.0.1 Device: iOS iPhone Category: Games Price: $4.99, Version: 1.0.1 (iTunes) Description: | Read more »

Price Scanner via MacPrices.net

Logo Pop Free Vector Logo Design App For OS X...
128bit Technologies has released of Logo Pop Free 1.2 for Mac OS X, a vector based, full-fledged, logo design app available exclusively on the Mac App Store for the agreeable price of absolutely free... Read more
21-inch 1.4GHz iMac on sale for $999, save $1...
B&H Photo has new 21″ 1.4GHz iMac on sale for $999 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Best Buy has the 21″ 1.4GHz iMac on sale for $999.99 on their... Read more
16GB iPad mini 3 on sale for $339, save $60
B&H Photo has the 16GB iPad mini 3 WiFi on sale for $339 including free shipping plus NY tax only. Their price is $60 off MSRP. Read more
Save up to $40 on iPad Air 2, NY tax only, fr...
B&H Photo has iPad Air 2s on sale for up to $40 off MSRP including free shipping plus NY sales tax only: - 16GB iPad Air 2 WiFi: $489 $10 off - 64GB iPad Air 2 WiFi: $559 $40 off - 128GB iPad Air... Read more
Apple Releases OS X 10.10.4 With WIFi Fix, iO...
On Tuesday, Apple released final versions of OS X 10.10.4 and iOS 8.4, as well as updates for the Safari browser for OS X Yosemite, Mavericks, and Mountain Lion. The OS X 10.10.4 update focuses on... Read more
Dual-Band High-Gain Antennas for Home Wi-Fi N...
Linksys has announced what it claims are the first dual-band, omni-directional high-gain antennas for the consumer market. The new Linksys high-gain antennas available in a 2- and 4-pack (WRT004ANT... Read more
Apple refurbished 2014 15-inch Retina MacBook...
The Apple Store has Apple Certified Refurbished 2014 15″ 2.2GHz Retina MacBook Pros available for $1609, $390 off original MSRP. Apple’s one-year warranty is included, and shipping is free. They have... Read more
Clearance 2014 MacBook Airs available for up...
Adorama has 2014 MacBook Airs on sale for up to $301 off original MSRP including NY + NJ sales tax and free shipping: - 11″ 256GB MacBook Air: $798 $301 off original MSRP - 13″ 128GB MacBook Air: $... Read more
5K iMacs on sale for $100 off MSRP, free ship...
B&H Photo has the new 27″ 3.3GHz 5K iMac on sale for $1899.99 including free shipping plus NY tax only. Their price is $100 off MSRP. They have the 27″ 3.5GHz 5K iMac on sale for $2199, also $100... Read more
27-inch 3.2GHz iMac on sale for $1679, save $...
B&H Photo has the 27″ 3.2GHz iMac on sale for $1679.99 including free shipping plus NY sales tax only. Their price is $120 off MSRP. Read more

Jobs Board

*Apple* TV Live Streaming Frameworks Test En...
**Job Summary** Work and contribute towards the engineering of Apple 's state-of-the-art products involving video, audio, and graphics in Interactive Media Group (IMG) at Read more
Project Manager, WW *Apple* Fulfillment Ope...
…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
Senior Data Scientist, *Apple* Retail - Onl...
**Job Summary** Apple Retail - Online sells Apple products to customers around the world. In addition to selling Apple products with unique services such as iPad Read more
*Apple* Music Producer - Apple (United State...
**Job Summary** Apple Music seeks a Producer to help shepherd some of the most important content and editorial initiatives within the music app, with a particular focus Read more
Sr. Technical Services Consultant, *Apple*...
**Job Summary** Apple Professional Services (APS) has an opening for a senior technical position that contributes to Apple 's efforts for strategic and transactional Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.