276) Is there a canvas widget or drawing widget for graphical

display?

[Last modified: Nov 96]

Answer:  (Loox added Nov 96) The LOOX dynamic graphics development tool
includes a Drawing Manager widget for the display of dynamic graphics screens.
Features include

 - display of intelligent graphics primitives (polylines, ellipses, pixmaps,
links)
 - easy animation, blinking etc of primitives
 - dynamic control objects (sliders, knobs, dials, toggles, multi-states,
digital display)
 - C and C++ APIs
 - LOOXMaker graphical editor for interactive primitive creation and animation

Contact:

        Loox Software Inc.
        4962 El Camino Real, # 206
        Los Altos, CA 94022
        voice : (415)903-0942
        fax: (415)903-9824
        url: http://www.loox.com
        email: sales@loox.com


Groupe Bull - Koala Project has a Motif Canvas [Knvas] Widget.  This widget is
intended to provide graphical display (lines, rectangles, icons,...) and
direct manipulation services (select, move, resize,...) for Xt based
applications. This widget is intended to be include in a MOTIF application,
but you can generate an Athena widget (though demos are only using MOTIF). The
widget is shipped with an objects library based on a C object oriented model
called KLONE (use of the Xt object model would dramaticaly increase
application load time and KLONE provides garbage collection).  Features:


                                    - 12 -


- uses an improved C small object-oriented model (garbage col. + polymorphism)
- multi-view: an object may be shared between two views (canvases)
- Multi-display: two views may be on different displays / screens
- double buffering for smooth animations
- easy to use "just know how to use widgets"
- small objects
- garbage collection
- Tag object to define graphical object appearance
- define tag's attributes with Xt resources
- dispatch mechanism uses Xt -> you can set Xt translations on a graphic obj
- Interactor objects to define a complete behavior
- unlimited Zoom / Unzoom
- classes: Line, Rect, Filled rect, Xpm Icon, Group, Ellipse, Anchor, Link
- mouse interactors: select, move, resize

More info available at:

        http://www.inria.fr/koala/jml/widgets/knvas.html
        ftp://avahi.inria.fr/pub/widgets/knvas-1.13.2.tar.gz

Requirements: MOTIF, XPM

Thanks to Jean-Michel.Leon@sophia.inria.fr.  Thanks to Joachim Fabini
(jo@vmars.tuwien.ac.at) for updating me on the name change from "canvas" to
"knvas" and the version change.