More Graphics Concepts

GUI Graphical User Interface vs CLI (Command Line Interface)

• windows
• menus
• buttons

Layout Managers

• Flow Layout-Displays components left to right and then top to bottom
• Border Layout-Displays components "north", "south", "east", "west", or "center"
• GridLayout-Displays components in a "grid," with each component justified so that it fills its space in the grid.

Events, Handlers, and Listeners

• An event is something like: clicking the mouse, dragging, choosing a menu item, or pressing a key on the keyboard. In other words, an event is something that is intended to elicit a response.
• A listener is an object that detects an event. (For example, if you want to be able to click a button, that button will be associated with a listener to detect when it has been clicked.)
• A handler is a method that responds appropriately to the event.

Constructors
• TextField (int width) //empty textfield, with width columns
• TextField (String s) //textfield containing the string s
• TextField (String s, int width) //textfield with string s, width //columns

Methods
• getText() //returns a string from the textfield
• setText() //puts the given string in the textfield

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