BTEC Extended Diploma for IT Practitioners Event Driven Programming (2010) ~ Unit 14 ~ Unit Code : F/601/7281 Level 3 14.P1 14.P2 14.P3 14.P4 14.P5 14.P6 14.M1 Explain the key features of event driven programs. Demonstrate the use of event driven tools and techniques. Design an event driven application to meet defined requirements. Implement a working event driven application to meet defined requirements. Test an event driven application. Create onscreen help to assist the users of a computer program
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D1 – Non-Graphical Event Driven Applications D1 requires you to be able to evaluate the suitability of event driven programs for non-graphical applications… Introduction Many electrical devices are “event driven”. An event simply means an input or output. For example‚ a computer is programmed to respond to a mouse click‚ or a keyboard press. When this event (input) happens‚ an action (output) will occur‚ for example opening of a window‚ or text appearing on a word processor. However some
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Suitability of event driven programs (for non-graphical applications) The washing machine sits idle waiting for a command from the user via the buttons (event triggers). It then identifies what button was pressed and then executes the code associated with that trigger. As the dial moves‚ it will hit the trigger point which will cause the next action however; the user can stop the process immediately with a certain button (trigger). A washing machine cannot assume because the code means that it
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Event driven program Event-driven programming is a flow of programs which are determined by events like user actions for example mouse clicks‚ sensor outputs‚ or messages from other programs. There are a lot of key features that are used in event driven program. Without these feature then certain event can’t happen. The key features of event driven programs are service oriented‚ time driven‚ event handlers‚ trigger functions‚ events‚ form‚ user interface‚ event loops‚ flexibility‚ suitability for
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Sequential vs. Event-driven Programming Reacting to the user Outline Sequential programming GUI program organization Event-driven programming Modes Sequential Programming In sequential programs‚ the program is under control The user must synchronize with the program: Program tells user it is ready for input User enters input and it is processed Examples: Command-line prompts (DOS‚ UNIX) LISP interpreters Shouldn’t the program be required to synchronize with the user? Sequential
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Feasibility study A procedure that identifies‚ describes‚ and evaluates candidates systems and selects the best system for the job. Depending on the results of the initial investigation‚ the survey is expanded to a more detailed feasibility study. Feasibility study is a test of system proposal according to its workability‚ impact on the organization‚ ability to meet user needs‚ and effective use of resources. It focuses on three major questions: 1) What are the user’s demonstrable needs and how
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Object-oriented Programming/Event-Driven Programming versus Procedural Programming Professor Computer Program Design Object-oriented Programming/Event-Driven Programming versus Procedural Programming There are many advantages of using Object-oriented Programming (OOP) over Procedural Programming (PP). When using inheritance‚ you can develop new classes more quickly by extending existing classes that already work; you need to concentrate only on new features added by the new class.
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jQUERY 1.4.2 VISUAL CHEAT SHEET = NEW IN jQUERY 1.4.x / ❉ = DEPRECATED / SELECTORS ✼ CORE ✼ ATTRIBUTES ✼ CSS ✼ TRAVERSING ✼ MANIPULATION ✼ EVENTS ✼ EFFECTS ✼ AJAX ✼ UTILITIES a = ARRAY / jQ = jQUERY / El = ELEMENT / 0-1 = BOOLEAN / Obj = OBJECT / NUM = NUMBER / Str = STRING ❉ SELECTORS / 1. BASIC All Selector (“*”) Selects all elements. a :first Selector Selects the first matched element. a [name$=value] Selects elements that have the specified
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IsValid property of individual validator controls and of the page. If the request is a postback‚ any event handlers are called. Load Rendering Before rendering‚ view state is saved for the page and all controls. During the rendering phase‚ the page calls the Render method for each control‚ providing a text writer that writes its output to the OutputStream of the page’s Response property. Control events Unload Unload is called after the page has been fully rendered‚ sent to the client‚ and is ready to
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features of event driven programming such as events‚ event loops and event handlers 2 P2 - Explain how development environment components (e.g. Solution Explorer‚ Forms‚ Toolbox‚ Code Editor‚ Debugger‚ and Property Window) simplify the development. 3 M1 - Describe the features of an event driven language that make it suitable for creating a GUI 5 D1 - Evaluate the suitability of event driven programs for non-graphical applications 6 References 7 P1 - Identify the key features of event driven
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