Widget Toolkit

Popular widget toolkits

• Low-level widget toolkits:
• Integrated in the operating system:
• The Mac OS toolbox, or Macintosh APIs, formerly located in ROM, but in "new world" Macs, on disk.
• The Windows API used in Microsoft Windows
• As a separate layer on top of the operating system:
• The X Window System contains primitive building blocks, but they are almost always accessed using either Motif, GTK+ or Qt.

• High-level widget toolkits:
• On Macintosh:
• Cocoa - used in Mac OS X (see also Aqua)
• MacApp Macintosh framework
• MacZoop Macintosh C++ framework
• Powerplant Macintosh framework
• On Microsoft Windows:
• The Microsoft Foundation Classes (MFC), used by Microsoft for its own programs (e.g. Microsoft Office) and by most developers on the Microsoft Windows platform
• The Object Windows Library is sort of Borland's alternative to MFC
• The Visual Component Library (VCL) is Borland's toolkit used in its C++ Builder and Delphi products
• The Windows Forms is .NET's set of classes that handle GUI controls
• On Unix, under the X Window System:
• Xaw, the Project Athena widget set for the X Window System
• Motif used in the Common Desktop Environment
• Lesstif, an open source (LGPL) version of Motif
• Cross-platform, based on the Java programming language:
• The Abstract Windowing Toolkit is used in Java applications. It typically uses another toolkit on the selected platform in turn.
• Swing is Sun Microsystems's replacement for AWT in newer Java versions.
• The Standard Widget Toolkit is a native widget toolkit for Java that was invented as part of the Eclipse project. SWT will use the running platforms widget toolkit (such as Windows API or GTK+) underneath.
• Cross-platform, based on the programming languages C or C++, often with bindings to other languages:
• Tk, a widget set accessed from Tcl and other high-level script languages.
• GTK+, open source (LGPL), primarily for the X Window System, ported to and emulated under other platforms; used in the GNOME desktop environment
• Qt, open source (GPL) under Linux / X Window, proprietary under Mac OS and MS Windows; used in KDE
• wxWidgets (formerly wxWindows), open source (relaxed LGPL), abstracts toolkits across several platforms for C++, Python and Perl
• FOX toolkit, open source (LGPL), genuinely cross-platform
• FLTK, open source (LGPL), cross-platform toolkit designed to be small and fast

• not yet categorized:
• GNUstep
• WINGs WINGs Is Not GNUstep
• MetaCard

External links

• A GUI Toolkit Framework Page
• Survey of Widget sets
• GUI Toolkits for The X Window System (Leslie Polzer, freshmeat.net, 27 July, 2003)

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