USERUSER

INTERFACEINTERFACE

What is the User Interface?What is the User Interface?

The The user interfaceuser interface (or (or Human Human Computer InterfaceComputer Interface) is the aggregate ) is the aggregate of means by which people (theof means by which people (the users) users) interact with theinteract with the system (a particular system (a particular machine), device, computermachine), device, computer program program or other complex tools. or other complex tools.

The user interface provides:The user interface provides:

Input which allows the users’ to Input which allows the users’ to manipulate a system manipulate a system

Output which allows the system to Output which allows the system to produce the effects of the users' produce the effects of the users' manipulation.manipulation.

Types of User InterfacesTypes of User Interfaces Command drivenCommand driven Menu driven interfaceMenu driven interface Pull Down MenuPull Down Menu Pop-up MenuPop-up Menu IconsIcons Touch ScreenTouch Screen Anti-glare ScreenAnti-glare Screen

Command drivenCommand driven

The command driven interface The command driven interface requires the user to type requires the user to type commands using keywords that commands using keywords that tells the operating system what to tells the operating system what to do e.g. format or copy.do e.g. format or copy.

Give an example of a software that is Give an example of a software that is command driven?command driven?

ExampleExampleCopying a file from directory.Copying a file from directory.

Menu driven interfaceMenu driven interfaceTerm used to describe a software Term used to describe a software

program that is operated using file program that is operated using file menus (menu.htm) instead of using menus (menu.htm) instead of using commands. Menu driven interface commands. Menu driven interface allows the user the freedom of allows the user the freedom of manipulating the system without manipulating the system without having to memorise the different having to memorise the different commands. commands.

Menu-driven interface Cont’dMenu-driven interface Cont’d

Menu-driven interface is commonly Menu-driven interface is commonly easier for most users as it is a easier for most users as it is a graphical environment and allows graphical environment and allows the user to navigate using the the user to navigate using the mouse.mouse.

Give an example of a software that Give an example of a software that uses menu-driven interface?uses menu-driven interface?

Example of Menu InterfaceExample of Menu Interface

Example of web menu driven interfaceExample of web menu driven interface

Pull Down MenuPull Down MenuAlso called a Also called a drop-down menudrop-down menu that that

appears when you select an item with appears when you select an item with a mouse. The item you select is a mouse. The item you select is generally at the top of the display generally at the top of the display screen, and the menu appears just screen, and the menu appears just below it, as if you had pulled it down.below it, as if you had pulled it down.

Example of Example of Pull Down MenuPull Down Menu

Formatting a word documentFormatting a word document

Pop-up MenuPop-up MenuA group of options or selections offered A group of options or selections offered

to a user that appears as a result of to a user that appears as a result of pressing a special function key, pressing a special function key, clicking a button with the mouseclicking a button with the mouse. . Pop-Pop-up menus are used to display a list of up menus are used to display a list of articles for each section of a site that can articles for each section of a site that can help your Web visitors by saving them time help your Web visitors by saving them time and effort in their search for useful and effort in their search for useful information.information.

Example of Example of Pop-up MenuPop-up Menu

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What is an icon?What is an icon?An icon is a graphic image, a small An icon is a graphic image, a small

picture or object that represents a file, picture or object that represents a file, program, web page, or command. program, web page, or command. Icons help you execute commands, Icons help you execute commands, open programs or documents quickly. open programs or documents quickly. To execute a command by using an To execute a command by using an icon, click or double-click on the icon. icon, click or double-click on the icon. Give an example of an iconGive an example of an icon

Example of an Example of an IconIcon

Icons shown on an IPhoneIcons shown on an IPhone

Touch ScreenTouch Screen

A touch screen is a display which can A touch screen is a display which can detect the presence and location of a detect the presence and location of a touch within the display area. The touch within the display area. The term generally refers to touch or term generally refers to touch or contact to the display of the device by contact to the display of the device by a finger or hand.a finger or hand.

Example of Touch ScreenExample of Touch Screen

Anti-glare ScreenAnti-glare Screen

What is an anti-glare screen?

What is the main purpose of the anti-glare screen?

Anti-glare ScreenAnti-glare Screen

This is a monitor screen that is This is a monitor screen that is treated to reduce glare from light treated to reduce glare from light sources. sources.

It is a polarized screen attached to It is a polarized screen attached to the front of the monitor which the front of the monitor which reduces eye strainreduces eye strain

Example of Anti-glare screenExample of Anti-glare screen

Computer and anti-glare screenComputer and anti-glare screen

Class ActivityClass Activity What are the advantages and What are the advantages and

disadvantages of menu driven disadvantages of menu driven interface over command driven interface over command driven interface?interface?

Give one example of an operating Give one example of an operating system that uses a command driven system that uses a command driven interfaceinterface

Class DiscussionClass Discussion What would be the impact on our What would be the impact on our

society if we were still using the society if we were still using the command driven interface on our command driven interface on our operating systems? Discuss.operating systems? Discuss.