#!/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.

REALbasic for Dummies
by Erick Tejkowski

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Drawing a Simple Gradient by Seth Willits
02-07-04

Drawing a Gradient
There are four very simple parts to the code in this project. 1) choose your starting and ending colors, 2) a loop which iterates for each step of the gradient, 3) the algorithm to determine the color for each step of the gradient, and 4) draw the gradient! Take a look at the code below. Lines 5 and 6? We pick our colors. Yay! Lines 10 and 19? The loop for each step (each vertical pixel). Yay! Lines 13-15? We pick our the color of the current step. Yay! Line 18? We draw the step of the gradient. Yay!

Sub Paint(g as graphics)
    dim i as integer, ratio, endratio as Double
    dim StartColor, EndColor as Color

    // Pick our colors
    StartColor = RGB(255, 0, 0)
    EndColor = RGB(0, 0, 255)

    // Draw the gradient
    for i = g.Height DownTo 0

        // Determine the current line's color
        ratio = (i/g.Height)
        endratio = ((g.Height-i)/g.Height)
        g.ForeColor = RGB(EndColor.Red * endratio + StartColor.Red * ratio, EndColor.Green * endratio + StartColor.Green * ratio, EndColor.Blue * endratio + StartColor.Blue * ratio)

        // Draw the step
        g.DrawLine 0, i, g.Width, i
    next
End Sub

The Finished Product
That's all there is to it! I know it was a pretty short tutorial compared to some others I've done. Sue me! :^) On average they're longer than Erick's! lol. I just thought this up a few days ago anyway. I've never drawn a gradient before. I'm trying to imagine how you would do completely dynamic radial and angled gradients. That'd be cool. Well, with what's above you can easily do simple gradients like the Finder does in the Places sidebar. Anyway, you can download the project here.

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Drawing a Simple Gradient by Seth Willits 02-07-04

Drawing a Simple Gradient by Seth Willits
02-07-04