NAME
XmDirection — Data type for the direction of widget components
SYNOPSIS
#include <Xm/Xm.h>
DESCRIPTION
XmDirection is the data type specifying the direction in which the
system displays subwidgets, children of widgets, or other visual
components that are to be laid out. This data type also affects
traversal order within tab groups.
XmDirection is implemented as an unsigned char bit mask. The
horizontal and vertical directions can be specified independent of each
other. XmDirection also specifies the precedence of the horizontal and
vertical directions relative to each other. For example, a value of
XmRIGHT_TO_LEFT_TOP_TO_BOTTOM lays out a component horizontally from
right to left first, then vertically top to bottom.
XmDirection provides the following masks, each of which corresponds to
a particular bit in XmDirection:
· XmRIGHT_TO_LEFT_MASK
· XmLEFT_TO_RIGHT_MASK
· XmTOP_TO_BOTTOM_MASK
· XmBOTTOM_TO_TOP_MASK
· XmPRECEDENCE_HORIZ_MASK
· XmPRECEDENCE_VERT_MASK
In addition to the preceding single bit masks, XmDirection also
provides the following multiple bit masks. These multiple bit masks are
particularly useful as arguments to XmDirectionMatchPartial:
· XmHORIZONTAL_MASK
· XmPRECEDENCE_MASK
· XmVERTICAL_MASK
Motif also provides the following enumerated constants for specifying
various combinations of directions:
XmRIGHT_TO_LEFT_TOP_TO_BOTTOM
Specifies that the components are laid out from right to left
first, then top to bottom.
XmLEFT_TO_RIGHT_TOP_TO_BOTTOM
Specifies that the components are laid out from left to right
first, then top to bottom.
XmRIGHT_TO_LEFT_BOTTOM_TO_TOP
Specifies that the components are laid out from right to left
first, then bottom to top.
XmLEFT_TO_RIGHT_BOTTOM_TO_TOP
Specifies that the components are laid out from left to right
first, then bottom to top.
XmTOP_TO_BOTTOM_RIGHT_TO_LEFT
Specifies that the components are laid out from top to bottom
first, then right to left.
XmTOP_TO_BOTTOM_LEFT_TO_RIGHT
Specifies that the components are laid out from top to bottom
first, then left to right.
XmBOTTOM_TO_TOP_RIGHT_TO_LEFT
Specifies that the components are laid out from bottom to top
first, then right to left.
XmBOTTOM_TO_TOP_LEFT_TO_RIGHT
Specifies that the components are laid out from bottom to top
first, then left to right.
XmTOP_TO_BOTTOM
Specifies that the components are laid out from top to
bottom. If horizontal direction is important, do not use
this constant.
XmBOTTOM_TO_TOP
Specifies that the components are laid out from bottom to
top. If horizontal direction is important, do not use this
constant.
XmDEFAULT_DIRECTION
Specifies that the components are laid out according to the
default direction. (This constant is primarily for widget
writers.)
XmLEFT_TO_RIGHT
Specifies that the components are laid out from left to
right. If vertical direction is important, do not use this
constant.
XmRIGHT_TO_LEFT
Specifies that the components are laid out from right to
left. If vertical direction is important, do not use this
constant.
RELATED
XmDirectionMatch(3), XmDirectionMatchPartial(3),
XmDirectionToStringDirection(3), XmString(3), XmStringDirection(3), and
XmStringDirectionToDirection(3).
XmDirection(library call)