#!/usr/bin/perl -w # # Copyright 2000 by Michael Coyle # Released under GPL. # # Call it with: # [an error occurred while processing this directive] # # Get the file name from the browser... $file_name = $ENV{'QUERY_STRING'}; # Open the file... open (EP, $file_name); # Print to the browser... print "Content-Type: text/html \n\n"; # Load the file and keep spitting it out to the browser... while () { chomp; print "$_ "; } # Close the file and go home... close EP #!/usr/bin/perl -w # # Copyright 2000 by Michael Coyle # Released under GPL. # # Call it with: # [an error occurred while processing this directive] # # Get the file name from the browser... $file_name = $ENV{'QUERY_STRING'}; # Open the file... open (EP, $file_name); # Print to the browser... print "Content-Type: text/html \n\n"; # Load the file and keep spitting it out to the browser... while () { chomp; print "$_ "; } # Close the file and go home... close EP

3D
3D Photo Gallery (Part 1)
3D Photo Gallery (Part 2)

Audio
Poor Man's MIDI
Make A Metronome
iPod Tricks (Part 1)
iPod Tricks (Part 2)
iPod Tricks (Part 3)
Laugh Track Machine
Audio Player with Reverb
Shepard Melody
RB Phone Home
Build a Drum Machine

Custom Controls and Windows
Double Click Listbox
Draggable Metal Window
Double Click Canvas
Custom Buttons
Custom Buttons Part II
iTunes-style Listboxes
Custom Controls


General RB
Scrolling Windows
Using Mesage Dialogs
Case-Sensitive Word Finder
Introduction to Stacks
Wiggle Window
JPEG in PDF
Listbox Checkboxes
Background Applications
Listbox Auto-Find
Virtual Volumes
Time Tracker
Software Distribution (Part 1)
Software Distribution (Part 2)
Software Distribution (Part 3)
Software Distribution (Part 4)
Exceptions
Tips and Tricks
Text Clippings Made Easy

Graphics
Drawing a Simple Gradient
The SpriteSurface: Space Game
Image Spinner
Cropping Graphics (Part 1)
Cropping Graphics (Part 2)
Cropping Graphics (Part 3)
Cropping Graphics (Part 4)
Shimmer Graphics
Lissajous Figures
Simple Screen Capture
Vector Graphics
Kaleidoscope Images
Stegonography
Spirals!
Image Table
RB Magnifying Lens
Screen Capture
Color Picker Tutorial

Hacks
Ghost Grab
Speedy Mouse Extension
iTunes Plugins
iTunes Skinner

Mac OS X
Global Hot Key Event (Carbon Events)
Login Welcomer (Carbon Events)
Add/Remove Buttons
Resizable Sheets
Mac OS X Preferences Window
Using Sheets in REALbasic
Build a Bundle (Part 1)
Build a Bundle (Part 2)
Dock Your Passwords
Mac OS X Debugging
REALbasic Mac OS X Icon Tutorial
Animate Your Dock
RB and the Command Line

Menus
Window Menu
Templates Menu
Listbox Menu

Novelty
Guessing Game
Calendar Trivia
Tile Mixer
Zip Code Finder
Happy Valentine's Day
Merlin Simulator (Part 1)
Merlin Simulator (Part 2)
Merlin Simulator (Part 3)
Buzzword Machine
AppleSoft BASIC

Printing
Print to PDF

Registration
Registration Code Validation
Network Registration Codes

Resources
Picture Extractor (Part 1)
Picture Extractor (Part 2)

Serial
Caller ID (Part 1)
Caller ID (Part 2)
Caller ID (Part 3)

Speech
Speech Recognition
Socket Communication
Easy Peer-to-Peer File Sharing
MacPAD Version Checking
Display Web Image In Canvas
HTML IMG Tags
Version Tracking
Even Smarter Instant Messaging
Web Tiler
JavaScript and REALbasic
Stock Ticker (Part I)
Stock Ticker (Part 2)
AIM Mate

XML Manipulation
Simple XML Introduction

Video
Big Brother Video Capture

Note: All articles without a byline were written by Erick Tejkowski. When cleaning the site I removed them because the code differed from page to page, and I have yet to put them back in.

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REALbasic for Dummies
by Erick Tejkowski

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Listbox Checkboxes
05-30-03




Someone on the REALbasic NUG email lists today wanted to know how to use checkboxes in a Listbox control. To help him out, this week's tutorial will show you how to display checkboxes in a listbox and how to find out if a particular checkbox is checked or not.

Build the Interface
Fire up REALbasic and add a Listbox, an Editfield, and a Pushbutton to Window1. You can arrange the interface however you want, but mine looks like this: (note - the Listbox is on top)

5-30-03_img1.jpg (18k)

Add the Code
The code for this example looks like most Listbox code, with a few exceptions. First, we'll designate our Listbox as having three columns that display headings. Then, we need to assign a type to each column using the columnType property. There are a few choices:

  • 0 - default
  • 1 - text
  • 2 - checkbox
  • 3 - editable text
We'll set the first column (i.e. column 0) as a checkbox, the second column as non-editable text, and the third column as editable text. Finally, we populate the Listbox with some dummy values just to demonstrate how this all works. Use the cellCheck property to set the initial value of each checkbox. The cellCheck property requires two parameters: a row and a column (just like the Cell property). Stick the following code in the Open event of Listbox1.

To find out if a checkbox is checked or not, all you have to do is look at the Boolean value of cellCheck. Place the following code in the Action event of PushButton1. It loops through each row in the Listbox and grabs that row's name column if its checkbox is checked.

That's all there is to it. Run the project and click some of the chechboxes in the Listbox. Then, click the Pushbutton to see what happens. Simple, eh? Here's what the final result looks like:

5-30-03_img2.jpg (26k)

Conclusion
You can download the code for this week's project here. See you next week!





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#!/usr/bin/perl -w # # Copyright 2000 by Michael Coyle # Released under GPL. # # Call it with: # [an error occurred while processing this directive] # # Get the file name from the browser... $file_name = $ENV{'QUERY_STRING'}; # Open the file... open (EP, $file_name); # Print to the browser... print "Content-Type: text/html \n\n"; # Load the file and keep spitting it out to the browser... while () { chomp; print "$_ "; } # Close the file and go home... close EP #!/usr/bin/perl -w # # Copyright 2000 by Michael Coyle # Released under GPL. # # Call it with: # [an error occurred while processing this directive] # # Get the file name from the browser... $file_name = $ENV{'QUERY_STRING'}; # Open the file... open (EP, $file_name); # Print to the browser... print "Content-Type: text/html \n\n"; # Load the file and keep spitting it out to the browser... while () { chomp; print "$_ "; } # Close the file and go home... close EP