GUI - University of Texas at El Paso：桂-德克萨斯大学在埃尔帕索.ppt

GUIGraphical User InterfaceOutline?Introduction?ponents?Layout Manager?Events and Listeners?ExamplesIntroductionDefinition?Abbreviated GUI (pronounced GOO-ee). ?Programinterface that takes advantage of puter'sgraphics capabilities to make the program easier to use. ?User interface based on graphics (icons and pictures and menus) instead of text; uses a mouse as well as a keyboard as an input device.?Includes standard formats for representing text and ?Douglas Engelbart's Augmentation of Human Intellect project at SRI in the 1960s developed the On-Line System, which incorporated a mouse-driven cursor and multiple windows. ?The first GUI was designed by Xerox Corporation's Palo Alto Research Center in 1973.?Features: 3-button mouse, bit-mapped display,the use of graphical windows, work. ?Macintosh team at puter (included members of the Xerox PARC group) continued to develop such ideas in the mercially essful product to use a GUI, the Apple Macintosh, released in January 1984. ?One reason for their slow acceptance: require considerable CPU power and a high-quality GUI?GUI frameworks?Part of Java Foundation Classes (JFC)?Two important packages:?Abstract Window Toolkit (AWT). Provides the basic support for building GUIs.?Swing. Extension of AWT, provides extensive support for building high-quality GUIs.?Components, also known as widgets, are the building blocks of the visual aspect.?Each GUI is characterized by its visual appearance and its behavior pattern in response to user Window ToolkitWhat is it??Is a GUI toolkit that is supplied with all Java systems.?Provides the basic support for building graphical user interfaces ponents? provides the classes for the interfaces?AWT is designed to be portable and work across multiple ponents: represents something that has a position and size and can be painted on the screen and receive input events.?Component subclasses of ponent class.?Two types:?ponents: components th