What is GUI ?
• The interface which replace cryptic command by their graphical representation are called as graphical user interface.
• Ex. Windows operating system is GUI based operating system.
• ADVANTAGES :
• It is not necessary to remember the commands and is meaning .
• User can run several programs simultaneously.
• User can communicate and exchange data between program without transferring and copying the data .
• Easy to use.
Features of GUI
• Replacement of command with icon :;
• Command are group together in various levels of hierarchy and when the user select a group , further commands in that group are displayed .
• This allow user to select command using cursor and simply clicking on it .
• User can select the command and use the application without first having to know about the computer and it working .
• provide online help :
• It provide HELP about various features of the application .
• Help can assists the user in knowing everything about the application.
Essential components :
• Menu bar : appear at the top.
• Scroll bar : allow user to scroll the window.
• Dialogue boxes : used to display information or to get input ,
1) Modeless dialogue box. Continue without response
2)Modal dialogue box. Continue with response < br>
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