A widget toolkit, widget library, GUI toolkit, or UX library is a library or a collection of libraries containing a set of graphical control elements (called widgets) used to construct the graphical user interface (GUI) of programs.
Most widget toolkits additionally include their own rendering engine. This engine can be specific to a certain operating system or windowing system or contain back-ends to interface with more multiple ones and also with rendering APIs such as OpenGL, OpenVG, or EGL.
The look and feel of the graphical control elements can be hard-coded or decoupled, allowing the graphical control elements to be themed/skinned.
Contents
1Overview
2Windowing systems
3See also
4References
Overview
Some toolkits may be used from other languages by employing language bindings. Graphical user interface builders such as e.g. Glade Interface Designer facilitate the authoring of GUIs in a WYSIWYG manner employing a user interface markup language such as in this case GtkBuilder.
The GUI of a program is commonly constructed in a cascading manner, with graphical control elements being added directly to on top of one another.
Most widget toolkits use event-driven programming as a model for interaction.[1] The toolkit handles user events, for example when the user clicks on a button. When an event is detected, it is passed on to the application where it is dealt with. The design of those toolkits has been criticized for promoting an oversimplified model of event-action, leading programmers to create error-prone, difficult to extend and excessively complex application code.[2]Finite State Machines and Hierarchical State Machines have been proposed as high-level models to represent the interactive state changes for reactive programs.
Windowing systems
A window is considered to be a graphical control element. In some windowing systems windows are added directly to the scene graph (canvas) by the window manager, and can be stacked and layered on top of each other through various means. Each window is associated with a particular application which controls the widgets added to its canvas, which can be watched and modified by their associated applications.
See also
WIMP (computing)
Layout manager
List of widget toolkits
References
^Past, Present and Future of User Interface Software Tools. Brad Myers, Scott E. Hudson, Randy Pausch, Y Pausch. ACM Transactions on Computer-Human Interaction, 2000. [1]
Florida Star v. B. J. F. From Wikipedia, the free encyclopedia Jump to navigation Jump to search United States Supreme Court case Florida Star v. B. J. F. Supreme Court of the United States Argued March 21, 1989 Decided June 21, 1989 Full case name The Florida Star v. B. J. F. Citations 491 U.S. 524 ( more ) 109 S. Ct. 2603; 105 L. Ed. 2d 443; 1989 U.S. LEXIS 3120; 57 U.S.L.W. 4816; 16 Media L. Rep. 1801 Prior history The Florida Star v. B.J.F., 530 So.2d 286 (1988) Supreme Court of Florida; Florida Star v. B.J.F., 499 So.2d 883 (1986) Fla. Dist. Court of Appeals Holding Florida Stat. § 794.03 is unconstitutional to the extent it makes the truthful reporting of information that was a matter of public record unlawful, as it violates the First Amendment. Court membership Chief Justice William Rehnquist Associate Justices William J. Brennan Jr. · Byron White Thurgood Marshall · Harry Blac...
Danny Elfman From Wikipedia, the free encyclopedia Jump to navigation Jump to search Danny Elfman Elfman at the 2010 San Diego Comic-Con Born Daniel Robert Elfman ( 1953-05-29 ) May 29, 1953 (age 65) Los Angeles, California, U.S. Spouse(s) Bridget Fonda ( m. 2003) Children 1 Musical career Genres Rock [1] ska [2] new wave film music video game music Occupation(s) Composer, singer, songwriter, record producer Instruments Trombone guitar percussion vocals keyboards [3] Years active 1972–present Associated acts Oingo Boingo James Newton Howard Daniel Robert Elfman (born May 29, 1953) is an American composer, singer, songwriter, and record producer. Elfman first became known for being the lead singer and songwriter for the band Oingo Boingo from 1974 to 1995. He is well known for scoring films and television shows, particularly his frequent collabora...
The Sandy Post From Wikipedia, the free encyclopedia Jump to navigation Jump to search The Sandy Post Type Weekly Newspaper Format Tabloid Owner(s) Community Newspapers/Pamplin Media Group Publisher J. Mark Garber Editor Steve Brown Founded 1937 ( 1937 ) Headquarters Sandy, Oregon Circulation 3,800 Website www.pamplinmedia.com/sandy-post-home/ This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (February 2010) (Learn how and when to remove this template message) The Sandy Post is a weekly newspaper, published in Sandy, Oregon, United States. The paper, founded in 1937, serves the communities of Sandy, Boring, the Villages at Mount Hood and the surrounding areas. The newspaper is owned by Community Newspapers/Pamplin Media Group, a company of ...
