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OpenSoft's Free Pascal
Widget Set

Author: Graeme Geldenhuys (graemeg at gmail dot com)

Introduction

The first version of my widget set was
based around a heavily modified LPTK.
I then discovered the discontinued fpGUI
and fpGFX
projects. I tried to contact the original author to no avail. The
fpGUI code hasn't been touched since early 2002. After studying the
code for a few weeks, I came to the conclusion that fpGUI is much
closer to what I strived to accomplish with my modified LPTK. A lot
was still missing from fpGUI though.

After thinking long and hard, I decided to
start my widget set again, but this time based on
the work done in fpGUI and fpGFX (after all, why reinvent the wheel).
I also added to the mix some good ideas I saw in Qt 4.1. So far I
have completed quite a few things missing in fpGUI, but I still need
to do a lot to get to the point where I left off in my first attempt
using LPTK. I set myself a list of things outstanding which should
get it to a usable level. I also added a lot of documentation as I
went (yes a programmer that documents) as there was no documentation
included with fpGUI and fpGFX. Documenation is important to attract
other developers in using the widget set.

So I guess you can say I am creating a fpGUI version 2. :-)

Pascal
Script™ 3.0






Pascal Script is a free scripting engine that allows you to use most of
the Object
Pascal language within your Delphi projects at runtime. Written completely
in Delphi,
it's composed of a set of units that can be compiled into your executable,
eliminating
the need to distribute any external files.






Pascal Script includes the following features:




• 
  Variables, Constants
  
• 
  Standard language constructs:
  
  • 
    Begin/End
    
  • 
    If/Then/Else
    
  • 
    For/To/Downto/Do
    
  • 
    Case x Of
    
  • 
    Repeat/Until
    
  • 
    While
    
  • 
    uses
    
  • 
    Exit
    
  • 
    Continue
    
  • 
    Break

TechInsite Object Persistence Framework

The TechInsite Object Persistence Framework (tiOPF) is an Open Source framework of Delphi code that simplifies the mapping of an object oriented business model into a relational database. The framework is mature and robust. It has been in use on production sites for over five years. It is free, open source, and available for immediate download with full source code. More details can be found here.

The latest stable, release build is available here.

The daily build (work in progress, possibly un-stable) is available here.

ArtFormula v.1.0b
FWS377 Kb15 Dec 2005By Artem Parlyuk. ArtFormula package contains two nonvisual Delphi componenst for symbolic expression parsing and evaluation. Provides runtime scripting engine for automating your programs.


Provides:


• 7 arithmetic operations
  
• 10 logical operations
  
• string concatenation
  
• 22 arithmetic functions
  
• 10 statistical functions
  
• 2 logical functions
  
• 15 string functions
  
• 13 date functions
  
• User defined constant
  
• Up to 255 user defined variables
  
• Up to 255 user defined functions (modules).
  
• Variables definitions and assigmnent statement
  
• Increment and Decrement operations
  
• Return function
  
• Compound statement (BEGIN... END)
  
• IF statement
  
• WHILE loop
  
• UNTIL loop
  
• FOR loop
  
• Interface functions: msg(’text’,’caption’,props), input(’caption’, ’text’, defvalue).
  

Fully functional
Source: Included
Exe-demo included


Download: D7

TMinimizer v.1.0
FWS306 Kb10 Feb 2006By Artem Parlyuk. Non-visual Delphi component for scientific calculation. It implements several methods of local minimization. The objective function can be specified in symbolical form.



Methods implemented:





• Rosenbrock method
  
• Quasi-Newton algorithms (Davidon-Fletcher-Powell, Fletcher, Broyden)
  
• Conjugate gradient algorithms (Fletcher-Reeves, Pshenichny, steepest descent)
  
• Newton method.
  

Fully functional
Source: Included
Exe-demo included


Download: D7

Units of Measurement v.1.0
FWS258 Kb06 Mar 2002By Agri Visser Consultancy. This package provides an easy way of converting most of the units of measurement found in
use around the World today.

Unit conversion factors are defined for:

• Mass
  
• Distance
  
• Time
  
• Force
  
• Temperature
  
• Angle
  
• RadioActivity
  
• Energy
  
• Area
  
• Volume
  
• Flow
  
• MassFlow
  
• Pressure
  
• Velocity
  
• Accelleration
  
• Power
  
• FuelConsumption
  
• Torque.
  

Fully functional
Source: Included
Exe-demo included


Download: D5 D6

TMathGrid and TMathCurve components help to display such objects as curves, lines, graphs, etc. TIntEdit and TFloatEdit components allow to edit integer and floating-point values......

Specialized component for parsing and evaluating mathematical expressions specified at runtime. Only 40-80% slower than the equivalent compiled expression......

TMinimizer is nonvisual Delphi component for scientific calculation. It implements several methods of local minimization (Rosenbrock method, Quasi-Newton algorithms (Davidon-Fletcher-Powell, Fletcher, Broyden), Conjugate gradient algorithms (Fletcher-Reeves, Pshenichny, steepest descent), Newton method).
Download