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Volume 6A: Motif Programming Manual
book

Volume 6A: Motif Programming Manual

by David Brennan, Dan Heller, Paula Ferguson
September 1993
Intermediate to advanced content levelIntermediate to advanced
1014 pages
28h 26m
English
O'Reilly Media, Inc.
Content preview from Volume 6A: Motif Programming Manual
keysym. This function allows an application that overrides the default XtKeyProc to handle Motif's virtual key
bindings. See Section #seventspec in Chapter 2, The Motif Programming Model, for more information on virtual
bindings. The new XmChangeColor() routine changes the foreground color, shadow colors, and select color for a
widget based on a background color. The XmNdarkThreshold, XmN-foregroundThreshold, and
XmNlightThreshold resources of the Screen object allow the application or the user to set values that affect the
default color calculation algorithm. The values for these resources indicate the levels of perceived brightness (between
0 and 100) that distinguish between a light color and a dark color. The XmNforegroundThreshold value is used
in calculating the default foreground and highlight colors, while the other two resources are used in calculating the
default shadow and select colors. See Section #scolor for a discussion of color resources in Motif. An application can
use the new XmWidgetGetBaselines() routine to get the position of the text baseline in a widget, while
XmWidgetGetDisplayRect() can be used to get the size and position of the bounding box for the widget. These
routines provide information that is useful in laying out and aligning components in an interface.
4.5.2 Specific Widget Changes
Motif 1.2 also introduces a number of new features, including resources and callback routines, for individual widget
classes. In Motif 1.2, the Frame widget can have two children: ...
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Publisher Resources

ISBN: 9780596000431