Event-driven programming<

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Kids.net.au - Encyclopedia Computer programming -

See also eventb>-drivenb> programming, software, software documentation, programming language, computer science, software engineering, imperative programming, functional programming, cut and paste programming.
Programming is the act of creating a computer program, a concrete set of instructions for a computer to carry out.
The program is written in a programming language.

http://www.kidsseek.com/encyclopedia-wiki/pr/Programming (430 words)



Eventb>-drivenb> programming - Wikipedia, the free encyclopedia

Programming an eventb> drivenb> system is thus a matter of rewriting the default trigger functions of the system, to match the required behavior.
Eventb>-drivenb> programming stresses flexibility and asynchrony as virtues, and tries to be as modeless as possible.
Eventb>-drivenb> programs typically consist of a number of small programs called eventb> handlers, which are to be called in response to external events, and a dispatcher, which calls the eventb> handlers, often using an eventb> queue to hold unprocessed events.

http://en.wikipedia.org/wiki/Event-driven_programming (556 words)



Eventb> drivenb> programming language - Wikipedia, the free encyclopedia

Most eventb>-drivenb> programming environments already provide this main loop, so it needs not be rewritten.
An eventb> drivenb> programming language is a programming language in which events (mouse clicks, key presses) cause portions of the code to execute.
The third step in developing an eventb>-drivenb> program is to write the "main loop": a function that checks for events, and then calls the matching eventb> handler.

http://en.wikipedia.org/wiki/Event_driven_programming_language (365 words)



Encyclopedia: ML programming language

In computer science, imperative programming, as opposed to declarative programming, is a programming paradigm that describes computation in terms of a program state and statements that change the program state.
ML is often referred to as an impure functional language, because it permits side-effects, and therefore imperative programming, unlike purely functional programming languages such as Haskell.
ML is a general-purpose functional programming language developed by Robin Milner and others in the late 1970s at the University of Edinburgh, whose syntax is inspired by ISWIM.

http://www.nationmaster.com/encyclopedia/ML-programming-language (1980 words)



Fundamentals of Window Systems and Eventb> Drivenb> Programming

Eventb> Drivenb> Programming underlies all modern window systems such as X and the various Microsoft Windows.
Eventb> drivenb> programs have a structure that is quite different from batch programs and when run under a window system, they must rely on the window software facilities that tend to be quite complex.
Prerequisite: Programming experience in C. There are no theoretical prerequisites but the course will be fast paced and assume that students have already written nontrivial batch programs in C. Undergraduate CS majors interested in the course should send e-mail to the instructor about possible arrangments.

http://www.cs.sunysb.edu/~theo/s96.html (319 words)



Programming Overview

Visual Basic 6.0 is an eventb>-drivenb> programming language which has some of the elements of an object-oriented programming language, but not all of the features of an object-oriented programming language.
In the eventb>-drivenb> programming model the coded lines of the program are not written and executed in a sequential logic because the user action of clicking a key or checkbox or button triggers an eventb>.
XML (Extensible Markup Language) is not considered a programming language.

http://www.hitmill.com/programming/overview.html (683 words)



Eventb>-drivenb> programming - Wikipedia, the free encyclopedia

Programming an eventb> drivenb> system is thus a matter of rewriting the default trigger functions of the system, to match the required behavior.
Computer operating systems are another classic example of eventb>-drivenb> programs on at least two levels.
Eventb>-drivenb> programs typically consist of a number of small programs called eventb> handlers, which are to be called in response to external events, and a dispatcher, which calls the eventb> handlers, often using an eventb> queue to hold unprocessed events.

http://en.wikipedia.org/wiki/Event-driven_programming (527 words)



Introduction into eventb>-drivenb> programming

This program is already an example of eventb>-drivenb> programming.
It is a general-purpose eventb> queue, allowing to specify an arbitrary eventb> source, to manage eventb> handlers, and offering a system how the events are sent to the eventb> handlers that can process them.
Or, the program blocks because it waits until the output side is ready, but there have already input bytes arrived which cannot be read in because the program blocks.

http://www.ocaml-programming.de/packages/documentation/equeue/users-guide/c34.html (1079 words)



Logtalk user manual: eventb>-drivenb> programming

The need to associate computations to the occurrence of events was very early recognized in several knowledge representation languages, in some programming languages [Stefik 86, Moon 86], and in the implementation of operative systems [Tanenbaum 87] and graphical user interfaces.
The words eventb> and monitor have multiple meanings in computer science, so, to avoid misunderstandings, it is advisable that we start by defining them in the Logtalk context.
The task of generating events is accomplished, in a transparent way, by the message sending mechanism.

http://www.uc.pt/logtalk/manuals/userman/events.html (1447 words)



Eventb> drivenb> programming language - Wikipedia, the free encyclopedia

Most eventb>-drivenb> programming environments already provide this main loop, so it needs not be rewritten.
An eventb> drivenb> programming language is a programming language in which events (mouse clicks, key presses) cause portions of the code to execute.
An example of an EDP (Eventb> Drivenb> Programing) is Visual Basic or VisualAge.

http://en.wikipedia.org/wiki/Event_driven_programming_language (355 words)



Eventb>-drivenb> programming vs. multi-threaded programming

One of the tasks of eventb>-drivenb> programming is to avoid blocking situations, another is to schedule the processor activities.
The artificial eventb> carries the result of the operation, and is added to the eventb> system directly from the thread that executed the operation.
First of all, multi-threaded programming has the disadvantage that every line of the program must follow certain programming guidelines, especially shared storage must be protected by mutexes such that everything is "reentrant".

http://www.ocaml-programming.de/packages/documentation/equeue/users-guide/c483.html (603 words)



tutorial_details.aspx?tutorial_id=504

The meat of eventb>-drivenb> programming is in the eventb>-handlers.
Eventb>-drivenb> programming vastly improves on older models because it transfers the flow of the program from the programmer to the user.
This is probably the most important conceptual part of even-drivenb> programming: the user is in control of your code.

http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=504 (1416 words)



Eventb>-Drivenb> Programming with Twisted and Python Linux Journal

A new breed of frameworks for third-generation languages is taming the once complex world of eventb>-drivenb> programming.
In the eventb> of an error, self.outgoingProxyError is called with a Failure object, which brings us to error handling.
Plenty of explanations of asynchronous programming exist, but I think the best way to understand its benefits is to wait in line with an idle cashier.

http://www.linuxjournal.com/article/7871 (2629 words)



Object Oriented and Eventb> Drivenb> Programming

The early applications of object oriented programming included eventb>-drivenb> systems such as simulations and graphical user interfaces; those represent, to this day, the areas in which OOP techniques are most effective.
GUIed programs typically are created using eventb>-drivenb> systems where all sorts of "events" can result in (processing being done).
The idea of OOP is to encapsulate data and processing methods together, which is useful here in that the system can be informed that an eventb> has occurred, and then manage this by asking a method to act on the relevant piece of data.

http://cbbrowne.com/info/eventdriven.html (877 words)



Instructor Class Description

The development of a computer program involves rigorous thought about the decomposition of a problem into subproblems, the sequencing of steps, the use of visual objects on the screen, the selection of data structures, and the meaning of statements in a programming language.
The objective of all programming is to model or simulate some rationally describable process - in the real world or imaginary - as a logical and arithmetic procedure.
Programming Assignments are to be the result of individual work (they are not group or team activities).

http://www.washington.edu/students/icd/S/infosys/320burrows.html (611 words)



Visual Basic

In both cases, the code is written in a programming language that is intended to cater to the novice and be easy to use.
The approach for connecting the programming language to the graphical user interface is derived from a system called Tripod, originally developed by Alan Cooper, which was further developed by Cooper and his associates under contract to Microsoft.
Programmers who preferred to write 16-bit programs were pleased to find that Visual Basic 5.0 was able to import programs written in Visual Basic 4.0, and it was not difficult to convert Visual Basic 5.0 programs to be compatible with Visual Basic 4.0.

http://www.sciencedaily.com/encyclopedia/visual_basic (1647 words)



Applets and Eventb>-Drivenb> Programming

Eventb>-drivenb> programs sit and wait for events to happen.
Events are arranged in an eventb> hierarchy, delivered (or fired) by eventb> sources and handled by eventb> listeners.
Eventb> listeners must be registered with a source in order to receive a particular eventb> type.

http://www.cs.newpaltz.edu/~pletcha/EventDrivenProgramming.html (1699 words)



Eventb> drivenb> programming

Note that eventb>-drivenb> programming can be part of either an application or an applet.
The user’s action is referred to as an eventb>, which in turn activates a particular part of the program.
After the software has completed the necessary response to the eventb>, the program ‘waits’ for the next eventb>.

http://learning.unl.ac.uk/java1/lm_jav1_eventprog/lm_jav1_eventprog_t.htm (187 words)



Eventb>-Drivenb> Programming

An eventb> is something interesting that happens in the system
All communication from user to computer is done via events
Instead of the user waiting on program, have the program wait on the user

http://guir.berkeley.edu/courses/bmrc-courseware/cs160/fall00/Lectures/toolkit-details/sld026.htm (34 words)



Penn College Courses: Eventb>-Drivenb> Programming

This course is a comprehensive introduction to eventb>-drivenb> programming in which statements in a program execute in response to some user action.
These concepts are explored through lectures and programming assignments on a selected eventb>-drivenb> language.
Students learn properties, methods, and eventb> pertaining to an object and its interface.

http://www.pct.edu/catalog/courses/csc365.shtml (70 words)



The QP7 Programming Page: Visual Basic Tutorial

Everything in windows programming is set up in procedures because programs don't start from line 1 and end at line 300.
Events of a control are also called that object's procedure, as the menu boxes in the code module imply.
The Form_Load eventb> is called whenever a form loads (obviously), and is where you can initialize variables and set initial properties, like load a control a rray or create mulitple instances of a form (this will sound more like english in a couple more sections).

http://www.geocities.com/SiliconValley/Bay/5707/vbasic.html (10549 words)



Eventb> Drivenb> Programs

Recall that programs can be batch oriented, whereby they start, do something then stop, or eventb> drivenb> where they start, wait for events and only stop when told to do so - by an eventb>.
Creating an application class is quite common in OO eventb> drivenb> environments because there is a lot of synergy between the concepts of events being sent to a program and messages being sent to an object.
First we implement the eventb> handler function that will be called when a keypress is detected then the main program body which simply starts up the eventb> gathering loop and calls the eventb> handling function when a valid eventb> is detected.

http://www.freenetpages.co.uk/hp/alan.gauld/tutevent.htm (1441 words)



lisack-cobol.txt

The concept of eventb>-drivenb> programming is also explained, in which the computer system does the work of watching for an eventb> and triggering the execution of the code that goes with that eventb>.
Modularization is a natural concept to introduce, because the very nature of an eventb>-drivenb> programming environment forces the programmer to break the program into modules coinciding with the events of the program.
After considering several languages, the newly-released Delphi was selected because it is a true object-oriented language, and therefore object-oriented concepts could be introduced from the start of the first programming course.

http://www.cs.luc.edu/mcc96/papers/lisack-cobol.txt (2872 words)



8 Eventb>-Drivenb> Programming and Agents

This can be programmed by having an "eventb> loop", triggered for each eventb>, which performs massive decision-making (if "The latest eventb> was `left mouse click on button 23'" then "Appropriate instructions" else if...
The mechanism is not just simple; it's also independent of your application, since it doesn't need to know about any particular control, eventb> or operation (it will find them in the object structure).
So it can be programmed once and for all, as part of a library such as EiffelVision 2 for platform-independent graphics.

http://docs.eiffel.com/eiffelstudio/general/guided_tour/language/invitation-09.html (883 words)



Business

Visual Basic.NET is an object-oriented/eventb> drivenb> programming language and will be used to allow student to design applications, making use of variables and constants, selection structures, repetition structures, sub and function procedures, string manipulations, sequential and random access files, and arrays.
The distributed programming and security approach used in Java was developed with the Internet computing model in mind.
Students who learn to design programs properly learn to analyze a problem statement, express its essence abstractly, and with examples; formulate statements and comments in a precise language; evaluate and revise these activities in light of checks and tests; and pay attention to details.

http://www.bishoplynch.org/business_computers.htm (1331 words)



Bates College: The College Catalog: Mathematics and Computer Science: Courses in Computer Science

It introduces the student to a disciplined approach to algorithmic problem-solving in a modern programming environment using an object-based eventb>-drivenb> programming language.
Recent topics have included the mathematics and algorithms of computer graphics, in which students designed and built a computer-graphics system, and contemporary programming languages and their implementations, in which students explored new languages, in some cases using the Internet to obtain languages such as Oberon, Python, Haskell, and Dylan.
The department permits registration for this unit only after the student submits a written proposal for a full-time research project to be completed during the Short Term and obtains the sponsorship of a member of the department to direct the study and evaluate its results.

http://abacus.bates.edu/catalog00-01/COMP.html (796 words)



Chapter 12 Eventb>-Drivenb> Programming

In eventb>-drivent programming, code is executed when an eventb> occurs - such as a button click or a mouse movement.
The root class of the eventb> clases is java.util.EventObject.
Most eventb> classes are in java.awt.eventb> except ListSelectionEvent, which is in javax.swing.eventb>.

http://www.mines.edu/~crader/cs261j/Liang/Chap12JB.html (400 words)



Events And JavaScript: Part 1 - Eventb> Handling - The Web Developer's Journal

The idea behind this is to represent all the possibilities we may encounter in computer events.
This program captures and handles the onfocus eventb>.
We capture the eventb> in the element, and tell the computer to call the question() function.

http://www.webdevelopersjournal.com/articles/jsevents1/jsevents1.html (1584 words)



Beginners Corner (Part 4) - Eventb>-Drivenb> Programming

Once they understand the mechanics of eventb>-drivenb> programming, they can find their own way to come to terms with object-oriented programming.
When programmers take on a strictly visual encapsulation metaphor mindset, they often tend to, in effect, give up on computer science and think less about their own new generic algorithms and ways of programming the machine, and much more about whats efficient in terms of how to code quickly in the operating system environment.
The basic reason for this difficulty is that procedural programmers are accustomed to an entirely different perspective on programming from that which the industry encourages in the way it speaks of OOP.

http://www.fghoche.com/dbulletin/bu15oop.htm (1296 words)



ISOM 2011 – USING COMPUTERS FOR

The objective is for the student to develop an understanding of how to analyze business requirements, design an effective GUI, code eventb> drivenb> VB programming language.
This course provides a study of fundamental concepts of Visual Basic 6.0 programming language including VB Development environment, elements of programming, program design, error trapping and debugging, database and file handling.
This course provides a study of fundamental concepts of Visual Basic 6.0 programming language including VB Development environment, elements of programming, program design, error trapping and debugging, database and file handling.

http://www.busn.ucok.edu/jcheng/syllubus_VB1_spring2003.htm (310 words)

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Topic: Event-driven <b>programming<

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