XmDirection






XmDirection — Data type for the direction of widget
components



     #include <Xm/Xm.h>



     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_MASKXmLEFT_TO_RIGHT_MASKXmTOP_TO_BOTTOM_MASKXmBOTTOM_TO_TOP_MASKXmPRECEDENCE_HORIZ_MASKXmPRECEDENCE_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_MASKXmPRECEDENCE_MASKXmVERTICAL_MASK

     Motif also provides the following enumerated constants
for specifying various combinations of directions:











                             ‐2‐


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









                             ‐3‐


          right to left.  If vertical direction is
          important, do not use this constant.



     XmDirectionMatch(3), XmDirectionMatchPartial(3),
XmDirectionToStringDirection(3), XmString(3),
XmStringDirection(3), and XmStringDirectionToDirection(3).