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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
Output of paned_win1.c
9.7.1 Pane Constraints
One problem with setting the maximum and minimum resources for a widget involves determining exactly what those
extents should be. The maximum size of 45 for the Label widgets in the source code is an arbitrary value that was
selected for demonstration purposes only. If other resources had been set on one of the Labels such that the widget
needed to be larger, the application would definitely look unbalanced. For example, an extremely high resolution
monitor might require the use of unusually large fonts in order for text to appear normal. There are two choices
available at this point. One is to specify the maximum and minimum values in a resolution−independent way and the
other is to ask the Label widget itself what height it wants to be.
Specifying resolution−independent dimensions requires you to carefully consider the type of application you are
creating. When you specify resolution−independent values, you must specify the values in either millimeters, inches,
points, or font units. The value of the XmN-unit-Type Manager resource controls the type of units that are used.
the source code demonstrates the use of resolution−independent dimensions. XtSetLanguageProc() is only
available in X11R5; there is no corresponding function in X11R4.
/* unit_types.c −−the same as paned_win1.c except that the
* Labels' minimum and maximum sizes are set to 1/4 inch and
* 1/2 inch respectively. These measurements are retained
* regardless of the pixels−per−inch ...
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Publisher Resources

ISBN: 9780596000431