XmDirection - Man Page

#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:

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XmRIGHT_TO_LEFT_MASK

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XmLEFT_TO_RIGHT_MASK

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XmTOP_TO_BOTTOM_MASK

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XmBOTTOM_TO_TOP_MASK

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XmPRECEDENCE_HORIZ_MASK

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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:

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XmHORIZONTAL_MASK

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XmPRECEDENCE_MASK

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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​.

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

XmDirectionMatch(3), XmDirectionMatchPartial(3), XmDirectionToStringDirection(3), XmManager(3), XmPrimitive(3), XmStringDirectionToDirection(3), XmStringGetNextTriple(3).